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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.cassandra.db;
import java.io.IOError;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.time.Instant;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.stream.StreamSupport;
import javax.management.openmbean.OpenDataException;
import javax.management.openmbean.TabularData;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.common.collect.HashMultimap;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.collect.SetMultimap;
import com.google.common.collect.Sets;
import com.google.common.io.ByteStreams;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.cql3.QueryProcessor;
import org.apache.cassandra.cql3.UntypedResultSet;
import org.apache.cassandra.cql3.statements.schema.CreateTableStatement;
import org.apache.cassandra.db.commitlog.CommitLog;
import org.apache.cassandra.db.commitlog.CommitLogPosition;
import org.apache.cassandra.db.compaction.CompactionHistoryTabularData;
import org.apache.cassandra.db.marshal.ByteBufferAccessor;
import org.apache.cassandra.db.marshal.BytesType;
import org.apache.cassandra.db.marshal.LongType;
import org.apache.cassandra.db.marshal.TimeUUIDType;
import org.apache.cassandra.db.marshal.TupleType;
import org.apache.cassandra.db.marshal.UTF8Type;
import org.apache.cassandra.db.marshal.UUIDType;
import org.apache.cassandra.db.partitions.PartitionUpdate;
import org.apache.cassandra.db.rows.Row;
import org.apache.cassandra.db.rows.Rows;
import org.apache.cassandra.dht.IPartitioner;
import org.apache.cassandra.dht.LocalPartitioner;
import org.apache.cassandra.dht.Range;
import org.apache.cassandra.dht.Token;
import org.apache.cassandra.exceptions.ConfigurationException;
import org.apache.cassandra.io.sstable.SSTableId;
import org.apache.cassandra.io.sstable.SequenceBasedSSTableId;
import org.apache.cassandra.io.util.DataInputBuffer;
import org.apache.cassandra.io.util.DataOutputBuffer;
import org.apache.cassandra.io.util.File;
import org.apache.cassandra.io.util.RebufferingInputStream;
import org.apache.cassandra.locator.IEndpointSnitch;
import org.apache.cassandra.locator.InetAddressAndPort;
import org.apache.cassandra.metrics.RestorableMeter;
import org.apache.cassandra.metrics.TopPartitionTracker;
import org.apache.cassandra.net.MessagingService;
import org.apache.cassandra.schema.CompactionParams;
import org.apache.cassandra.schema.KeyspaceMetadata;
import org.apache.cassandra.schema.KeyspaceParams;
import org.apache.cassandra.schema.Schema;
import org.apache.cassandra.schema.SchemaConstants;
import org.apache.cassandra.schema.TableId;
import org.apache.cassandra.schema.TableMetadata;
import org.apache.cassandra.schema.Tables;
import org.apache.cassandra.schema.Types;
import org.apache.cassandra.schema.UserFunctions;
import org.apache.cassandra.schema.Views;
import org.apache.cassandra.service.StorageService;
import org.apache.cassandra.service.paxos.Ballot;
import org.apache.cassandra.service.paxos.Commit;
import org.apache.cassandra.service.paxos.Commit.Accepted;
import org.apache.cassandra.service.paxos.Commit.AcceptedWithTTL;
import org.apache.cassandra.service.paxos.Commit.Committed;
import org.apache.cassandra.service.paxos.PaxosRepairHistory;
import org.apache.cassandra.service.paxos.PaxosState;
import org.apache.cassandra.service.paxos.uncommitted.PaxosRows;
import org.apache.cassandra.service.paxos.uncommitted.PaxosUncommittedIndex;
import org.apache.cassandra.streaming.StreamOperation;
import org.apache.cassandra.transport.ProtocolVersion;
import org.apache.cassandra.utils.ByteBufferUtil;
import org.apache.cassandra.utils.CassandraVersion;
import org.apache.cassandra.utils.FBUtilities;
import org.apache.cassandra.utils.MD5Digest;
import org.apache.cassandra.utils.Pair;
import org.apache.cassandra.utils.TimeUUID;
import org.apache.cassandra.utils.concurrent.Future;
import static java.lang.String.format;
import static java.util.Collections.emptyMap;
import static java.util.Collections.singletonMap;
import static org.apache.cassandra.config.Config.PaxosStatePurging.legacy;
import static org.apache.cassandra.config.DatabaseDescriptor.paxosStatePurging;
import static org.apache.cassandra.cql3.QueryProcessor.executeInternal;
import static org.apache.cassandra.cql3.QueryProcessor.executeInternalWithNowInSec;
import static org.apache.cassandra.cql3.QueryProcessor.executeOnceInternal;
import static org.apache.cassandra.service.paxos.Commit.latest;
import static org.apache.cassandra.utils.CassandraVersion.NULL_VERSION;
import static org.apache.cassandra.utils.CassandraVersion.UNREADABLE_VERSION;
import static org.apache.cassandra.utils.Clock.Global.currentTimeMillis;
import static org.apache.cassandra.utils.FBUtilities.now;
public final class SystemKeyspace
{
private SystemKeyspace()
{
}
private static final Logger logger = LoggerFactory.getLogger(SystemKeyspace.class);
public static final CassandraVersion CURRENT_VERSION = new CassandraVersion(FBUtilities.getReleaseVersionString());
public static final String BATCHES = "batches";
public static final String PAXOS = "paxos";
public static final String PAXOS_REPAIR_HISTORY = "paxos_repair_history";
public static final String PAXOS_REPAIR_STATE = "_paxos_repair_state";
public static final String BUILT_INDEXES = "IndexInfo";
public static final String LOCAL = "local";
public static final String PEERS_V2 = "peers_v2";
public static final String PEER_EVENTS_V2 = "peer_events_v2";
public static final String COMPACTION_HISTORY = "compaction_history";
public static final String SSTABLE_ACTIVITY_V2 = "sstable_activity_v2"; // v2 has modified generation column type (v1 - int, v2 - blob), see CASSANDRA-17048
public static final String TABLE_ESTIMATES = "table_estimates";
public static final String TABLE_ESTIMATES_TYPE_PRIMARY = "primary";
public static final String TABLE_ESTIMATES_TYPE_LOCAL_PRIMARY = "local_primary";
public static final String AVAILABLE_RANGES_V2 = "available_ranges_v2";
public static final String TRANSFERRED_RANGES_V2 = "transferred_ranges_v2";
public static final String VIEW_BUILDS_IN_PROGRESS = "view_builds_in_progress";
public static final String BUILT_VIEWS = "built_views";
public static final String PREPARED_STATEMENTS = "prepared_statements";
public static final String REPAIRS = "repairs";
public static final String TOP_PARTITIONS = "top_partitions";
/**
* By default the system keyspace tables should be stored in a single data directory to allow the server
* to handle more gracefully disk failures. Some tables through can be split accross multiple directories
* as the server can continue operating even if those tables lost some data.
*/
public static final Set TABLES_SPLIT_ACROSS_MULTIPLE_DISKS = ImmutableSet.of(BATCHES,
PAXOS,
COMPACTION_HISTORY,
PREPARED_STATEMENTS,
REPAIRS);
/** @deprecated See CASSANDRA-7544 */
@Deprecated(since = "4.0") public static final String LEGACY_PEERS = "peers";
/** @deprecated See CASSANDRA-7544 */
@Deprecated(since = "4.0") public static final String LEGACY_PEER_EVENTS = "peer_events";
/** @deprecated See CASSANDRA-7544 */
@Deprecated(since = "4.0") public static final String LEGACY_TRANSFERRED_RANGES = "transferred_ranges";
/** @deprecated See CASSANDRA-14404 */
@Deprecated(since = "4.0") public static final String LEGACY_AVAILABLE_RANGES = "available_ranges";
/** @deprecated See CASSANDRA-15637 */
@Deprecated(since = "4.0") public static final String LEGACY_SIZE_ESTIMATES = "size_estimates";
/** @deprecated See CASSANDRA-17048 */
@Deprecated(since = "4.1") public static final String LEGACY_SSTABLE_ACTIVITY = "sstable_activity";
// Names of all tables that could have been a part of a system keyspace. Useful for pre-flight checks.
// For details, see CASSANDRA-17777
public static final Set ALL_TABLE_NAMES = ImmutableSet.of(
BATCHES, PAXOS, PAXOS_REPAIR_HISTORY, PAXOS_REPAIR_STATE, BUILT_INDEXES, LOCAL, PEERS_V2, PEER_EVENTS_V2,
COMPACTION_HISTORY, SSTABLE_ACTIVITY_V2, TABLE_ESTIMATES, TABLE_ESTIMATES_TYPE_PRIMARY,
TABLE_ESTIMATES_TYPE_LOCAL_PRIMARY, AVAILABLE_RANGES_V2, TRANSFERRED_RANGES_V2, VIEW_BUILDS_IN_PROGRESS,
BUILT_VIEWS, PREPARED_STATEMENTS, REPAIRS, TOP_PARTITIONS, LEGACY_PEERS, LEGACY_PEER_EVENTS,
LEGACY_TRANSFERRED_RANGES, LEGACY_AVAILABLE_RANGES, LEGACY_SIZE_ESTIMATES, LEGACY_SSTABLE_ACTIVITY);
public static final Set TABLE_NAMES = ImmutableSet.of(
BATCHES, PAXOS, PAXOS_REPAIR_HISTORY, BUILT_INDEXES, LOCAL, PEERS_V2, PEER_EVENTS_V2,
COMPACTION_HISTORY, SSTABLE_ACTIVITY_V2, TABLE_ESTIMATES, AVAILABLE_RANGES_V2, TRANSFERRED_RANGES_V2, VIEW_BUILDS_IN_PROGRESS,
BUILT_VIEWS, PREPARED_STATEMENTS, REPAIRS, TOP_PARTITIONS, LEGACY_PEERS, LEGACY_PEER_EVENTS,
LEGACY_TRANSFERRED_RANGES, LEGACY_AVAILABLE_RANGES, LEGACY_SIZE_ESTIMATES, LEGACY_SSTABLE_ACTIVITY);
public static final TableMetadata Batches =
parse(BATCHES,
"batches awaiting replay",
"CREATE TABLE %s ("
+ "id timeuuid,"
+ "mutations list,"
+ "version int,"
+ "PRIMARY KEY ((id)))")
.partitioner(new LocalPartitioner(TimeUUIDType.instance))
.compaction(CompactionParams.stcs(singletonMap("min_threshold", "2")))
.build();
private static final TableMetadata Paxos =
parse(PAXOS,
"in-progress paxos proposals",
"CREATE TABLE %s ("
+ "row_key blob,"
+ "cf_id UUID,"
+ "in_progress_ballot timeuuid,"
+ "in_progress_read_ballot timeuuid,"
+ "most_recent_commit blob,"
+ "most_recent_commit_at timeuuid,"
+ "most_recent_commit_version int,"
+ "proposal blob,"
+ "proposal_ballot timeuuid,"
+ "proposal_version int,"
+ "PRIMARY KEY ((row_key), cf_id))")
.compaction(CompactionParams.lcs(emptyMap()))
.indexes(PaxosUncommittedIndex.indexes())
.build();
private static final TableMetadata BuiltIndexes =
parse(BUILT_INDEXES,
"built column indexes",
"CREATE TABLE \"%s\" ("
+ "table_name text," // table_name here is the name of the keyspace - don't be fooled
+ "index_name text,"
+ "value blob," // Table used to be compact in previous versions
+ "PRIMARY KEY ((table_name), index_name)) ")
.build();
private static final TableMetadata PaxosRepairHistoryTable =
parse(PAXOS_REPAIR_HISTORY,
"paxos repair history",
"CREATE TABLE %s ("
+ "keyspace_name text,"
+ "table_name text,"
+ "points frozen>>, "
+ "PRIMARY KEY (keyspace_name, table_name))"
+ "WITH COMMENT='Last successful paxos repairs by range'")
.build();
private static final TableMetadata Local =
parse(LOCAL,
"information about the local node",
"CREATE TABLE %s ("
+ "key text,"
+ "bootstrapped text,"
+ "broadcast_address inet,"
+ "broadcast_port int,"
+ "cluster_name text,"
+ "cql_version text,"
+ "data_center text,"
+ "gossip_generation int,"
+ "host_id uuid,"
+ "listen_address inet,"
+ "listen_port int,"
+ "native_protocol_version text,"
+ "partitioner text,"
+ "rack text,"
+ "release_version text,"
+ "rpc_address inet,"
+ "rpc_port int,"
+ "schema_version uuid,"
+ "tokens set,"
+ "truncated_at map,"
+ "PRIMARY KEY ((key)))"
).recordDeprecatedSystemColumn("thrift_version", UTF8Type.instance)
.build();
private static final TableMetadata PeersV2 =
parse(PEERS_V2,
"information about known peers in the cluster",
"CREATE TABLE %s ("
+ "peer inet,"
+ "peer_port int,"
+ "data_center text,"
+ "host_id uuid,"
+ "preferred_ip inet,"
+ "preferred_port int,"
+ "rack text,"
+ "release_version text,"
+ "native_address inet,"
+ "native_port int,"
+ "schema_version uuid,"
+ "tokens set,"
+ "PRIMARY KEY ((peer), peer_port))")
.build();
private static final TableMetadata PeerEventsV2 =
parse(PEER_EVENTS_V2,
"events related to peers",
"CREATE TABLE %s ("
+ "peer inet,"
+ "peer_port int,"
+ "hints_dropped map,"
+ "PRIMARY KEY ((peer), peer_port))")
.build();
private static final TableMetadata CompactionHistory =
parse(COMPACTION_HISTORY,
"week-long compaction history",
"CREATE TABLE %s ("
+ "id timeuuid,"
+ "bytes_in bigint,"
+ "bytes_out bigint,"
+ "columnfamily_name text,"
+ "compacted_at timestamp,"
+ "keyspace_name text,"
+ "rows_merged map,"
+ "compaction_properties frozen>,"
+ "PRIMARY KEY ((id)))")
.defaultTimeToLive((int) TimeUnit.DAYS.toSeconds(7))
.build();
private static final TableMetadata LegacySSTableActivity =
parse(LEGACY_SSTABLE_ACTIVITY,
"historic sstable read rates",
"CREATE TABLE %s ("
+ "keyspace_name text,"
+ "columnfamily_name text,"
+ "generation int,"
+ "rate_120m double,"
+ "rate_15m double,"
+ "PRIMARY KEY ((keyspace_name, columnfamily_name, generation)))")
.build();
private static final TableMetadata SSTableActivity =
parse(SSTABLE_ACTIVITY_V2,
"historic sstable read rates",
"CREATE TABLE %s ("
+ "keyspace_name text,"
+ "table_name text,"
+ "id text,"
+ "rate_120m double,"
+ "rate_15m double,"
+ "PRIMARY KEY ((keyspace_name, table_name, id)))")
.build();
/** @deprecated See CASSANDRA-15637 */
@Deprecated(since = "4.0")
private static final TableMetadata LegacySizeEstimates =
parse(LEGACY_SIZE_ESTIMATES,
"per-table primary range size estimates, table is deprecated in favor of " + TABLE_ESTIMATES,
"CREATE TABLE %s ("
+ "keyspace_name text,"
+ "table_name text,"
+ "range_start text,"
+ "range_end text,"
+ "mean_partition_size bigint,"
+ "partitions_count bigint,"
+ "PRIMARY KEY ((keyspace_name), table_name, range_start, range_end))")
.build();
private static final TableMetadata TableEstimates =
parse(TABLE_ESTIMATES,
"per-table range size estimates",
"CREATE TABLE %s ("
+ "keyspace_name text,"
+ "table_name text,"
+ "range_type text,"
+ "range_start text,"
+ "range_end text,"
+ "mean_partition_size bigint,"
+ "partitions_count bigint,"
+ "PRIMARY KEY ((keyspace_name), table_name, range_type, range_start, range_end))")
.build();
private static final TableMetadata AvailableRangesV2 =
parse(AVAILABLE_RANGES_V2,
"available keyspace/ranges during bootstrap/replace that are ready to be served",
"CREATE TABLE %s ("
+ "keyspace_name text,"
+ "full_ranges set,"
+ "transient_ranges set,"
+ "PRIMARY KEY ((keyspace_name)))")
.build();
private static final TableMetadata TransferredRangesV2 =
parse(TRANSFERRED_RANGES_V2,
"record of transferred ranges for streaming operation",
"CREATE TABLE %s ("
+ "operation text,"
+ "peer inet,"
+ "peer_port int,"
+ "keyspace_name text,"
+ "ranges set,"
+ "PRIMARY KEY ((operation, keyspace_name), peer, peer_port))")
.build();
private static final TableMetadata ViewBuildsInProgress =
parse(VIEW_BUILDS_IN_PROGRESS,
"views builds current progress",
"CREATE TABLE %s ("
+ "keyspace_name text,"
+ "view_name text,"
+ "start_token varchar,"
+ "end_token varchar,"
+ "last_token varchar,"
+ "keys_built bigint,"
+ "PRIMARY KEY ((keyspace_name), view_name, start_token, end_token))")
.build();
private static final TableMetadata BuiltViews =
parse(BUILT_VIEWS,
"built views",
"CREATE TABLE %s ("
+ "keyspace_name text,"
+ "view_name text,"
+ "status_replicated boolean,"
+ "PRIMARY KEY ((keyspace_name), view_name))")
.build();
private static final TableMetadata TopPartitions =
parse(TOP_PARTITIONS,
"Stores the top partitions",
"CREATE TABLE %s ("
+ "keyspace_name text,"
+ "table_name text,"
+ "top_type text,"
+ "top frozen>>,"
+ "last_update timestamp,"
+ "PRIMARY KEY (keyspace_name, table_name, top_type))")
.build();
private static final TableMetadata PreparedStatements =
parse(PREPARED_STATEMENTS,
"prepared statements",
"CREATE TABLE %s ("
+ "prepared_id blob,"
+ "logged_keyspace text,"
+ "query_string text,"
+ "PRIMARY KEY ((prepared_id)))")
.build();
private static final TableMetadata Repairs =
parse(REPAIRS,
"repairs",
"CREATE TABLE %s ("
+ "parent_id timeuuid, "
+ "started_at timestamp, "
+ "last_update timestamp, "
+ "repaired_at timestamp, "
+ "state int, "
+ "coordinator inet, "
+ "coordinator_port int,"
+ "participants set,"
+ "participants_wp set,"
+ "ranges set, "
+ "cfids set, "
+ "PRIMARY KEY (parent_id))").build();
/** @deprecated See CASSANDRA-7544 */
@Deprecated(since = "4.0")
private static final TableMetadata LegacyPeers =
parse(LEGACY_PEERS,
"information about known peers in the cluster",
"CREATE TABLE %s ("
+ "peer inet,"
+ "data_center text,"
+ "host_id uuid,"
+ "preferred_ip inet,"
+ "rack text,"
+ "release_version text,"
+ "rpc_address inet,"
+ "schema_version uuid,"
+ "tokens set,"
+ "PRIMARY KEY ((peer)))")
.build();
/** @deprecated See CASSANDRA-7544 */
@Deprecated(since = "4.0")
private static final TableMetadata LegacyPeerEvents =
parse(LEGACY_PEER_EVENTS,
"events related to peers",
"CREATE TABLE %s ("
+ "peer inet,"
+ "hints_dropped map,"
+ "PRIMARY KEY ((peer)))")
.build();
/** @deprecated See CASSANDRA-7544 */
@Deprecated(since = "4.0")
private static final TableMetadata LegacyTransferredRanges =
parse(LEGACY_TRANSFERRED_RANGES,
"record of transferred ranges for streaming operation",
"CREATE TABLE %s ("
+ "operation text,"
+ "peer inet,"
+ "keyspace_name text,"
+ "ranges set,"
+ "PRIMARY KEY ((operation, keyspace_name), peer))")
.build();
/** @deprecated See CASSANDRA-14404 */
@Deprecated(since = "4.0")
private static final TableMetadata LegacyAvailableRanges =
parse(LEGACY_AVAILABLE_RANGES,
"available keyspace/ranges during bootstrap/replace that are ready to be served",
"CREATE TABLE %s ("
+ "keyspace_name text,"
+ "ranges set,"
+ "PRIMARY KEY ((keyspace_name)))")
.build();
private static TableMetadata.Builder parse(String table, String description, String cql)
{
return CreateTableStatement.parse(format(cql, table), SchemaConstants.SYSTEM_KEYSPACE_NAME)
.id(TableId.forSystemTable(SchemaConstants.SYSTEM_KEYSPACE_NAME, table))
.gcGraceSeconds(0)
.memtableFlushPeriod((int) TimeUnit.HOURS.toMillis(1))
.comment(description);
}
public static KeyspaceMetadata metadata()
{
return KeyspaceMetadata.create(SchemaConstants.SYSTEM_KEYSPACE_NAME, KeyspaceParams.local(), tables(), Views.none(), Types.none(), UserFunctions.none());
}
private static Tables tables()
{
return Tables.of(BuiltIndexes,
Batches,
Paxos,
PaxosRepairHistoryTable,
Local,
PeersV2,
LegacyPeers,
PeerEventsV2,
LegacyPeerEvents,
CompactionHistory,
LegacySSTableActivity,
SSTableActivity,
LegacySizeEstimates,
TableEstimates,
AvailableRangesV2,
LegacyAvailableRanges,
TransferredRangesV2,
LegacyTransferredRanges,
ViewBuildsInProgress,
BuiltViews,
PreparedStatements,
Repairs,
TopPartitions);
}
private static volatile Map> truncationRecords;
public enum BootstrapState
{
NEEDS_BOOTSTRAP,
COMPLETED,
IN_PROGRESS,
DECOMMISSIONED
}
public static void persistLocalMetadata()
{
persistLocalMetadata(UUID::randomUUID);
}
@VisibleForTesting
public static void persistLocalMetadata(Supplier nodeIdSupplier)
{
String req = "INSERT INTO system.%s (" +
"key," +
"cluster_name," +
"release_version," +
"cql_version," +
"native_protocol_version," +
"data_center," +
"rack," +
"partitioner," +
"rpc_address," +
"rpc_port," +
"broadcast_address," +
"broadcast_port," +
"listen_address," +
"listen_port" +
") VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";
IEndpointSnitch snitch = DatabaseDescriptor.getEndpointSnitch();
executeOnceInternal(format(req, LOCAL),
LOCAL,
DatabaseDescriptor.getClusterName(),
FBUtilities.getReleaseVersionString(),
QueryProcessor.CQL_VERSION.toString(),
String.valueOf(ProtocolVersion.CURRENT.asInt()),
snitch.getLocalDatacenter(),
snitch.getLocalRack(),
DatabaseDescriptor.getPartitioner().getClass().getName(),
FBUtilities.getJustBroadcastNativeAddress(),
DatabaseDescriptor.getNativeTransportPort(),
FBUtilities.getJustBroadcastAddress(),
DatabaseDescriptor.getStoragePort(),
FBUtilities.getJustLocalAddress(),
DatabaseDescriptor.getStoragePort());
// We should store host ID as soon as possible in the system.local table and flush that table to disk so that
// we can be sure that those changes are stored in sstable and not in the commit log (see CASSANDRA-18153).
// It is very unlikely that when upgrading the host id is not flushed to disk, but if that's the case, we limit
// this change only to the new installations or the user should just flush system.local table.
if (!CommitLog.instance.hasFilesToReplay())
SystemKeyspace.getOrInitializeLocalHostId(nodeIdSupplier);
}
public static void updateCompactionHistory(TimeUUID taskId,
String ksname,
String cfname,
long compactedAt,
long bytesIn,
long bytesOut,
Map rowsMerged,
Map compactionProperties)
{
// don't write anything when the history table itself is compacted, since that would in turn cause new compactions
if (ksname.equals("system") && cfname.equals(COMPACTION_HISTORY))
return;
String req = "INSERT INTO system.%s (id, keyspace_name, columnfamily_name, compacted_at, bytes_in, bytes_out, rows_merged, compaction_properties) VALUES (?, ?, ?, ?, ?, ?, ?, ?)";
executeInternal(format(req, COMPACTION_HISTORY),
taskId,
ksname,
cfname,
ByteBufferUtil.bytes(compactedAt),
bytesIn,
bytesOut,
rowsMerged,
compactionProperties);
}
public static TabularData getCompactionHistory() throws OpenDataException
{
UntypedResultSet queryResultSet = executeInternal(format("SELECT * from system.%s", COMPACTION_HISTORY));
return CompactionHistoryTabularData.from(queryResultSet);
}
public static boolean isViewBuilt(String keyspaceName, String viewName)
{
String req = "SELECT view_name FROM %s.\"%s\" WHERE keyspace_name=? AND view_name=?";
UntypedResultSet result = executeInternal(format(req, SchemaConstants.SYSTEM_KEYSPACE_NAME, BUILT_VIEWS), keyspaceName, viewName);
return !result.isEmpty();
}
public static boolean isViewStatusReplicated(String keyspaceName, String viewName)
{
String req = "SELECT status_replicated FROM %s.\"%s\" WHERE keyspace_name=? AND view_name=?";
UntypedResultSet result = executeInternal(format(req, SchemaConstants.SYSTEM_KEYSPACE_NAME, BUILT_VIEWS), keyspaceName, viewName);
if (result.isEmpty())
return false;
UntypedResultSet.Row row = result.one();
return row.has("status_replicated") && row.getBoolean("status_replicated");
}
public static void setViewBuilt(String keyspaceName, String viewName, boolean replicated)
{
if (isViewBuilt(keyspaceName, viewName) && isViewStatusReplicated(keyspaceName, viewName) == replicated)
return;
String req = "INSERT INTO %s.\"%s\" (keyspace_name, view_name, status_replicated) VALUES (?, ?, ?)";
executeInternal(format(req, SchemaConstants.SYSTEM_KEYSPACE_NAME, BUILT_VIEWS), keyspaceName, viewName, replicated);
forceBlockingFlush(BUILT_VIEWS);
}
public static void setViewRemoved(String keyspaceName, String viewName)
{
String buildReq = "DELETE FROM %s.%s WHERE keyspace_name = ? AND view_name = ?";
executeInternal(String.format(buildReq, SchemaConstants.SYSTEM_KEYSPACE_NAME, VIEW_BUILDS_IN_PROGRESS), keyspaceName, viewName);
String builtReq = "DELETE FROM %s.\"%s\" WHERE keyspace_name = ? AND view_name = ? IF EXISTS";
executeInternal(String.format(builtReq, SchemaConstants.SYSTEM_KEYSPACE_NAME, BUILT_VIEWS), keyspaceName, viewName);
forceBlockingFlush(VIEW_BUILDS_IN_PROGRESS, BUILT_VIEWS);
}
public static void finishViewBuildStatus(String ksname, String viewName)
{
// We flush the view built first, because if we fail now, we'll restart at the last place we checkpointed
// view build.
// If we flush the delete first, we'll have to restart from the beginning.
// Also, if writing to the built_view succeeds, but the view_builds_in_progress deletion fails, we will be able
// to skip the view build next boot.
setViewBuilt(ksname, viewName, false);
executeInternal(String.format("DELETE FROM system.%s WHERE keyspace_name = ? AND view_name = ?", VIEW_BUILDS_IN_PROGRESS), ksname, viewName);
forceBlockingFlush(VIEW_BUILDS_IN_PROGRESS);
}
public static void setViewBuiltReplicated(String ksname, String viewName)
{
setViewBuilt(ksname, viewName, true);
}
public static void updateViewBuildStatus(String ksname, String viewName, Range range, Token lastToken, long keysBuilt)
{
String req = "INSERT INTO system.%s (keyspace_name, view_name, start_token, end_token, last_token, keys_built) VALUES (?, ?, ?, ?, ?, ?)";
Token.TokenFactory factory = ViewBuildsInProgress.partitioner.getTokenFactory();
executeInternal(format(req, VIEW_BUILDS_IN_PROGRESS),
ksname,
viewName,
factory.toString(range.left),
factory.toString(range.right),
factory.toString(lastToken),
keysBuilt);
}
public static Map, Pair> getViewBuildStatus(String ksname, String viewName)
{
String req = "SELECT start_token, end_token, last_token, keys_built FROM system.%s WHERE keyspace_name = ? AND view_name = ?";
Token.TokenFactory factory = ViewBuildsInProgress.partitioner.getTokenFactory();
UntypedResultSet rs = executeInternal(format(req, VIEW_BUILDS_IN_PROGRESS), ksname, viewName);
if (rs == null || rs.isEmpty())
return Collections.emptyMap();
Map, Pair> status = new HashMap<>();
for (UntypedResultSet.Row row : rs)
{
Token start = factory.fromString(row.getString("start_token"));
Token end = factory.fromString(row.getString("end_token"));
Range range = new Range<>(start, end);
Token lastToken = row.has("last_token") ? factory.fromString(row.getString("last_token")) : null;
long keysBuilt = row.has("keys_built") ? row.getLong("keys_built") : 0;
status.put(range, Pair.create(lastToken, keysBuilt));
}
return status;
}
public static synchronized void saveTruncationRecord(ColumnFamilyStore cfs, long truncatedAt, CommitLogPosition position)
{
String req = "UPDATE system.%s SET truncated_at = truncated_at + ? WHERE key = '%s'";
executeInternal(format(req, LOCAL, LOCAL), truncationAsMapEntry(cfs, truncatedAt, position));
truncationRecords = null;
forceBlockingFlush(LOCAL);
}
/**
* This method is used to remove information about truncation time for specified column family
*/
public static synchronized void removeTruncationRecord(TableId id)
{
Pair truncationRecord = getTruncationRecord(id);
if (truncationRecord == null)
return;
String req = "DELETE truncated_at[?] from system.%s WHERE key = '%s'";
executeInternal(format(req, LOCAL, LOCAL), id.asUUID());
truncationRecords = null;
forceBlockingFlush(LOCAL);
}
private static Map truncationAsMapEntry(ColumnFamilyStore cfs, long truncatedAt, CommitLogPosition position)
{
try (DataOutputBuffer out = DataOutputBuffer.scratchBuffer.get())
{
CommitLogPosition.serializer.serialize(position, out);
out.writeLong(truncatedAt);
return singletonMap(cfs.metadata.id.asUUID(), out.asNewBuffer());
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
public static CommitLogPosition getTruncatedPosition(TableId id)
{
Pair record = getTruncationRecord(id);
return record == null ? null : record.left;
}
public static long getTruncatedAt(TableId id)
{
Pair record = getTruncationRecord(id);
return record == null ? Long.MIN_VALUE : record.right;
}
private static synchronized Pair getTruncationRecord(TableId id)
{
if (truncationRecords == null)
truncationRecords = readTruncationRecords();
return truncationRecords.get(id);
}
private static Map> readTruncationRecords()
{
UntypedResultSet rows = executeInternal(format("SELECT truncated_at FROM system.%s WHERE key = '%s'", LOCAL, LOCAL));
Map> records = new HashMap<>();
if (!rows.isEmpty() && rows.one().has("truncated_at"))
{
Map map = rows.one().getMap("truncated_at", UUIDType.instance, BytesType.instance);
for (Map.Entry entry : map.entrySet())
records.put(TableId.fromUUID(entry.getKey()), truncationRecordFromBlob(entry.getValue()));
}
return records;
}
private static Pair truncationRecordFromBlob(ByteBuffer bytes)
{
try (RebufferingInputStream in = new DataInputBuffer(bytes, true))
{
return Pair.create(CommitLogPosition.serializer.deserialize(in), in.available() > 0 ? in.readLong() : Long.MIN_VALUE);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
/**
* Record tokens being used by another node
*/
public static synchronized void updateTokens(InetAddressAndPort ep, Collection tokens)
{
if (ep.equals(FBUtilities.getBroadcastAddressAndPort()))
return;
String req = "INSERT INTO system.%s (peer, tokens) VALUES (?, ?)";
executeInternal(String.format(req, LEGACY_PEERS), ep.getAddress(), tokensAsSet(tokens));
req = "INSERT INTO system.%s (peer, peer_port, tokens) VALUES (?, ?, ?)";
executeInternal(String.format(req, PEERS_V2), ep.getAddress(), ep.getPort(), tokensAsSet(tokens));
}
public static synchronized boolean updatePreferredIP(InetAddressAndPort ep, InetAddressAndPort preferred_ip)
{
if (preferred_ip.equals(getPreferredIP(ep)))
return false;
String req = "INSERT INTO system.%s (peer, preferred_ip) VALUES (?, ?)";
executeInternal(String.format(req, LEGACY_PEERS), ep.getAddress(), preferred_ip.getAddress());
req = "INSERT INTO system.%s (peer, peer_port, preferred_ip, preferred_port) VALUES (?, ?, ?, ?)";
executeInternal(String.format(req, PEERS_V2), ep.getAddress(), ep.getPort(), preferred_ip.getAddress(), preferred_ip.getPort());
forceBlockingFlush(LEGACY_PEERS, PEERS_V2);
return true;
}
public static synchronized void updatePeerInfo(InetAddressAndPort ep, String columnName, Object value)
{
if (ep.equals(FBUtilities.getBroadcastAddressAndPort()))
return;
String req = "INSERT INTO system.%s (peer, %s) VALUES (?, ?)";
executeInternal(String.format(req, LEGACY_PEERS, columnName), ep.getAddress(), value);
//This column doesn't match across the two tables
if (columnName.equals("rpc_address"))
{
columnName = "native_address";
}
req = "INSERT INTO system.%s (peer, peer_port, %s) VALUES (?, ?, ?)";
executeInternal(String.format(req, PEERS_V2, columnName), ep.getAddress(), ep.getPort(), value);
}
public static synchronized void updatePeerNativeAddress(InetAddressAndPort ep, InetAddressAndPort address)
{
if (ep.equals(FBUtilities.getBroadcastAddressAndPort()))
return;
String req = "INSERT INTO system.%s (peer, rpc_address) VALUES (?, ?)";
executeInternal(String.format(req, LEGACY_PEERS), ep.getAddress(), address.getAddress());
req = "INSERT INTO system.%s (peer, peer_port, native_address, native_port) VALUES (?, ?, ?, ?)";
executeInternal(String.format(req, PEERS_V2), ep.getAddress(), ep.getPort(), address.getAddress(), address.getPort());
}
public static synchronized void updateHintsDropped(InetAddressAndPort ep, TimeUUID timePeriod, int value)
{
// with 30 day TTL
String req = "UPDATE system.%s USING TTL 2592000 SET hints_dropped[ ? ] = ? WHERE peer = ?";
executeInternal(String.format(req, LEGACY_PEER_EVENTS), timePeriod, value, ep.getAddress());
req = "UPDATE system.%s USING TTL 2592000 SET hints_dropped[ ? ] = ? WHERE peer = ? AND peer_port = ?";
executeInternal(String.format(req, PEER_EVENTS_V2), timePeriod, value, ep.getAddress(), ep.getPort());
}
public static synchronized void updateSchemaVersion(UUID version)
{
String req = "INSERT INTO system.%s (key, schema_version) VALUES ('%s', ?)";
executeInternal(format(req, LOCAL, LOCAL), version);
}
private static Set tokensAsSet(Collection tokens)
{
if (tokens.isEmpty())
return Collections.emptySet();
Token.TokenFactory factory = StorageService.instance.getTokenFactory();
Set s = new HashSet<>(tokens.size());
for (Token tk : tokens)
s.add(factory.toString(tk));
return s;
}
private static Collection deserializeTokens(Collection tokensStrings)
{
Token.TokenFactory factory = StorageService.instance.getTokenFactory();
List tokens = new ArrayList<>(tokensStrings.size());
for (String tk : tokensStrings)
tokens.add(factory.fromString(tk));
return tokens;
}
/**
* Remove stored tokens being used by another node
*/
public static synchronized void removeEndpoint(InetSocketAddress ep)
{
String req = "DELETE FROM system.%s WHERE peer = ?";
executeInternal(String.format(req, LEGACY_PEERS), ep.getAddress());
req = String.format("DELETE FROM system.%s WHERE peer = ? AND peer_port = ?", PEERS_V2);
executeInternal(req, ep.getAddress(), ep.getPort());
forceBlockingFlush(LEGACY_PEERS, PEERS_V2);
}
/**
* This method is used to update the System Keyspace with the new tokens for this node
*/
public static synchronized void updateTokens(Collection tokens)
{
assert !tokens.isEmpty() : "removeEndpoint should be used instead";
Collection savedTokens = getSavedTokens();
if (tokens.containsAll(savedTokens) && tokens.size() == savedTokens.size())
return;
String req = "INSERT INTO system.%s (key, tokens) VALUES ('%s', ?)";
executeInternal(format(req, LOCAL, LOCAL), tokensAsSet(tokens));
forceBlockingFlush(LOCAL);
}
public static void forceBlockingFlush(String ...cfnames)
{
if (!DatabaseDescriptor.isUnsafeSystem())
{
List> futures = new ArrayList<>();
for (String cfname : cfnames)
{
futures.add(Keyspace.open(SchemaConstants.SYSTEM_KEYSPACE_NAME)
.getColumnFamilyStore(cfname)
.forceFlush(ColumnFamilyStore.FlushReason.INTERNALLY_FORCED));
}
FBUtilities.waitOnFutures(futures);
}
}
/**
* Return a map of stored tokens to IP addresses
*
*/
public static SetMultimap loadTokens()
{
SetMultimap tokenMap = HashMultimap.create();
for (UntypedResultSet.Row row : executeInternal("SELECT peer, peer_port, tokens FROM system." + PEERS_V2))
{
InetAddress address = row.getInetAddress("peer");
Integer port = row.getInt("peer_port");
InetAddressAndPort peer = InetAddressAndPort.getByAddressOverrideDefaults(address, port);
if (row.has("tokens"))
tokenMap.putAll(peer, deserializeTokens(row.getSet("tokens", UTF8Type.instance)));
}
return tokenMap;
}
/**
* Return a map of store host_ids to IP addresses
*
*/
public static Map loadHostIds()
{
Map hostIdMap = new HashMap<>();
for (UntypedResultSet.Row row : executeInternal("SELECT peer, peer_port, host_id FROM system." + PEERS_V2))
{
InetAddress address = row.getInetAddress("peer");
Integer port = row.getInt("peer_port");
InetAddressAndPort peer = InetAddressAndPort.getByAddressOverrideDefaults(address, port);
if (row.has("host_id"))
{
hostIdMap.put(peer, row.getUUID("host_id"));
}
}
return hostIdMap;
}
/**
* Get preferred IP for given endpoint if it is known. Otherwise this returns given endpoint itself.
*
* @param ep endpoint address to check
* @return Preferred IP for given endpoint if present, otherwise returns given ep
*/
public static InetAddressAndPort getPreferredIP(InetAddressAndPort ep)
{
Preconditions.checkState(DatabaseDescriptor.isDaemonInitialized()); // Make sure being used as a daemon, not a tool
String req = "SELECT preferred_ip, preferred_port FROM system.%s WHERE peer=? AND peer_port = ?";
UntypedResultSet result = executeInternal(String.format(req, PEERS_V2), ep.getAddress(), ep.getPort());
if (!result.isEmpty() && result.one().has("preferred_ip"))
{
UntypedResultSet.Row row = result.one();
return InetAddressAndPort.getByAddressOverrideDefaults(row.getInetAddress("preferred_ip"), row.getInt("preferred_port"));
}
return ep;
}
/**
* Return a map of IP addresses containing a map of dc and rack info
*/
public static Map> loadDcRackInfo()
{
Map> result = new HashMap<>();
for (UntypedResultSet.Row row : executeInternal("SELECT peer, peer_port, data_center, rack from system." + PEERS_V2))
{
InetAddress address = row.getInetAddress("peer");
Integer port = row.getInt("peer_port");
InetAddressAndPort peer = InetAddressAndPort.getByAddressOverrideDefaults(address, port);
if (row.has("data_center") && row.has("rack"))
{
Map dcRack = new HashMap<>();
dcRack.put("data_center", row.getString("data_center"));
dcRack.put("rack", row.getString("rack"));
result.put(peer, dcRack);
}
}
return result;
}
/**
* Get release version for given endpoint.
* If release version is unknown, then this returns null.
*
* @param ep endpoint address to check
* @return Release version or null if version is unknown.
*/
public static CassandraVersion getReleaseVersion(InetAddressAndPort ep)
{
try
{
if (FBUtilities.getBroadcastAddressAndPort().equals(ep))
{
return CURRENT_VERSION;
}
String req = "SELECT release_version FROM system.%s WHERE peer=? AND peer_port=?";
UntypedResultSet result = executeInternal(String.format(req, PEERS_V2), ep.getAddress(), ep.getPort());
if (result != null && result.one().has("release_version"))
{
return new CassandraVersion(result.one().getString("release_version"));
}
// version is unknown
return null;
}
catch (IllegalArgumentException e)
{
// version string cannot be parsed
return null;
}
}
/**
* One of three things will happen if you try to read the system keyspace:
* 1. files are present and you can read them: great
* 2. no files are there: great (new node is assumed)
* 3. files are present but you can't read them: bad
* @throws ConfigurationException
*/
public static void checkHealth() throws ConfigurationException
{
Keyspace keyspace;
try
{
keyspace = Keyspace.open(SchemaConstants.SYSTEM_KEYSPACE_NAME);
}
catch (AssertionError err)
{
// this happens when a user switches from OPP to RP.
ConfigurationException ex = new ConfigurationException("Could not read system keyspace!");
ex.initCause(err);
throw ex;
}
ColumnFamilyStore cfs = keyspace.getColumnFamilyStore(LOCAL);
String req = "SELECT cluster_name FROM system.%s WHERE key='%s'";
UntypedResultSet result = executeInternal(format(req, LOCAL, LOCAL));
if (result.isEmpty() || !result.one().has("cluster_name"))
{
// this is a brand new node
if (!cfs.getLiveSSTables().isEmpty())
throw new ConfigurationException("Found system keyspace files, but they couldn't be loaded!");
// no system files. this is a new node.
return;
}
String savedClusterName = result.one().getString("cluster_name");
if (!DatabaseDescriptor.getClusterName().equals(savedClusterName))
throw new ConfigurationException("Saved cluster name " + savedClusterName + " != configured name " + DatabaseDescriptor.getClusterName());
}
public static Collection getSavedTokens()
{
String req = "SELECT tokens FROM system.%s WHERE key='%s'";
UntypedResultSet result = executeInternal(format(req, LOCAL, LOCAL));
return result.isEmpty() || !result.one().has("tokens")
? Collections.emptyList()
: deserializeTokens(result.one().getSet("tokens", UTF8Type.instance));
}
public static int incrementAndGetGeneration()
{
String req = "SELECT gossip_generation FROM system.%s WHERE key='%s'";
UntypedResultSet result = executeInternal(format(req, LOCAL, LOCAL));
int generation;
if (result.isEmpty() || !result.one().has("gossip_generation"))
{
// seconds-since-epoch isn't a foolproof new generation
// (where foolproof is "guaranteed to be larger than the last one seen at this ip address"),
// but it's as close as sanely possible
generation = (int) (currentTimeMillis() / 1000);
}
else
{
// Other nodes will ignore gossip messages about a node that have a lower generation than previously seen.
final int storedGeneration = result.one().getInt("gossip_generation") + 1;
final int now = (int) (currentTimeMillis() / 1000);
if (storedGeneration >= now)
{
logger.warn("Using stored Gossip Generation {} as it is greater than current system time {}. See CASSANDRA-3654 if you experience problems",
storedGeneration, now);
generation = storedGeneration;
}
else
{
generation = now;
}
}
req = "INSERT INTO system.%s (key, gossip_generation) VALUES ('%s', ?)";
executeInternal(format(req, LOCAL, LOCAL), generation);
forceBlockingFlush(LOCAL);
return generation;
}
public static BootstrapState getBootstrapState()
{
String req = "SELECT bootstrapped FROM system.%s WHERE key='%s'";
UntypedResultSet result = executeInternal(format(req, LOCAL, LOCAL));
if (result.isEmpty() || !result.one().has("bootstrapped"))
return BootstrapState.NEEDS_BOOTSTRAP;
return BootstrapState.valueOf(result.one().getString("bootstrapped"));
}
public static boolean bootstrapComplete()
{
return getBootstrapState() == BootstrapState.COMPLETED;
}
public static boolean bootstrapInProgress()
{
return getBootstrapState() == BootstrapState.IN_PROGRESS;
}
public static boolean wasDecommissioned()
{
return getBootstrapState() == BootstrapState.DECOMMISSIONED;
}
public static void setBootstrapState(BootstrapState state)
{
if (getBootstrapState() == state)
return;
String req = "INSERT INTO system.%s (key, bootstrapped) VALUES ('%s', ?)";
executeInternal(format(req, LOCAL, LOCAL), state.name());
forceBlockingFlush(LOCAL);
}
public static boolean isIndexBuilt(String keyspaceName, String indexName)
{
String req = "SELECT index_name FROM %s.\"%s\" WHERE table_name=? AND index_name=?";
UntypedResultSet result = executeInternal(format(req, SchemaConstants.SYSTEM_KEYSPACE_NAME, BUILT_INDEXES), keyspaceName, indexName);
return !result.isEmpty();
}
public static void setIndexBuilt(String keyspaceName, String indexName)
{
String req = "INSERT INTO %s.\"%s\" (table_name, index_name) VALUES (?, ?) IF NOT EXISTS;";
executeInternal(String.format(req, SchemaConstants.SYSTEM_KEYSPACE_NAME, BUILT_INDEXES), keyspaceName, indexName);
forceBlockingFlush(BUILT_INDEXES);
}
public static void setIndexRemoved(String keyspaceName, String indexName)
{
String req = "DELETE FROM %s.\"%s\" WHERE table_name = ? AND index_name = ? IF EXISTS";
executeInternal(String.format(req, SchemaConstants.SYSTEM_KEYSPACE_NAME, BUILT_INDEXES), keyspaceName, indexName);
forceBlockingFlush(BUILT_INDEXES);
}
public static List getBuiltIndexes(String keyspaceName, Set indexNames)
{
List names = new ArrayList<>(indexNames);
String req = "SELECT index_name from %s.\"%s\" WHERE table_name=? AND index_name IN ?";
UntypedResultSet results = executeInternal(format(req, SchemaConstants.SYSTEM_KEYSPACE_NAME, BUILT_INDEXES), keyspaceName, names);
return StreamSupport.stream(results.spliterator(), false)
.map(r -> r.getString("index_name"))
.collect(Collectors.toList());
}
/**
* Read the host ID from the system keyspace.
*/
public static UUID getLocalHostId()
{
String req = "SELECT host_id FROM system.%s WHERE key='%s'";
UntypedResultSet result = executeInternal(format(req, LOCAL, LOCAL));
// Look up the Host UUID (return it if found)
if (result != null && !result.isEmpty() && result.one().has("host_id"))
return result.one().getUUID("host_id");
return null;
}
/**
* Read the host ID from the system keyspace, creating (and storing) one if
* none exists.
*/
public static synchronized UUID getOrInitializeLocalHostId()
{
return getOrInitializeLocalHostId(UUID::randomUUID);
}
private static synchronized UUID getOrInitializeLocalHostId(Supplier nodeIdSupplier)
{
UUID hostId = getLocalHostId();
if (hostId != null)
return hostId;
// ID not found, generate a new one, persist, and then return it.
hostId = nodeIdSupplier.get();
logger.warn("No host ID found, created {} (Note: This should happen exactly once per node).", hostId);
return setLocalHostId(hostId);
}
/**
* Sets the local host ID explicitly. Should only be called outside of SystemTable when replacing a node.
*/
public static synchronized UUID setLocalHostId(UUID hostId)
{
String req = "INSERT INTO system.%s (key, host_id) VALUES ('%s', ?)";
executeInternal(format(req, LOCAL, LOCAL), hostId);
forceBlockingFlush(LOCAL);
return hostId;
}
/**
* Gets the schema version or null if missing
*/
public static UUID getSchemaVersion()
{
String req = "SELECT schema_version FROM system.%s WHERE key='%s'";
UntypedResultSet result = executeInternal(format(req, LOCAL, LOCAL));
if (!result.isEmpty() && result.one().has("schema_version"))
return result.one().getUUID("schema_version");
return null;
}
/**
* Gets the stored rack for the local node, or null if none have been set yet.
*/
public static String getRack()
{
String req = "SELECT rack FROM system.%s WHERE key='%s'";
UntypedResultSet result = executeInternal(format(req, LOCAL, LOCAL));
// Look up the Rack (return it if found)
if (!result.isEmpty() && result.one().has("rack"))
return result.one().getString("rack");
return null;
}
/**
* Gets the stored data center for the local node, or null if none have been set yet.
*/
public static String getDatacenter()
{
String req = "SELECT data_center FROM system.%s WHERE key='%s'";
UntypedResultSet result = executeInternal(format(req, LOCAL, LOCAL));
// Look up the Data center (return it if found)
if (!result.isEmpty() && result.one().has("data_center"))
return result.one().getString("data_center");
return null;
}
/**
* Load the current paxos state for the table and key
*/
public static PaxosState.Snapshot loadPaxosState(DecoratedKey partitionKey, TableMetadata metadata, long nowInSec)
{
String cql = "SELECT * FROM system." + PAXOS + " WHERE row_key = ? AND cf_id = ?";
List results = QueryProcessor.executeInternalRawWithNow(nowInSec, cql, partitionKey.getKey(), metadata.id.asUUID()).get(partitionKey);
if (results == null || results.isEmpty())
{
Committed noneCommitted = Committed.none(partitionKey, metadata);
return new PaxosState.Snapshot(Ballot.none(), Ballot.none(), null, noneCommitted);
}
Row row = results.get(0);
Ballot promisedWrite = PaxosRows.getWritePromise(row);
Ballot promised = latest(promisedWrite, PaxosRows.getPromise(row));
// either we have both a recently accepted ballot and update or we have neither
Accepted accepted = PaxosRows.getAccepted(row);
Committed committed = PaxosRows.getCommitted(metadata, partitionKey, row);
// fix a race with TTL/deletion resolution, where TTL expires after equal deletion is inserted; TTL wins the resolution, and is read using an old ballot's nowInSec
if (accepted != null && !accepted.isAfter(committed))
accepted = null;
return new PaxosState.Snapshot(promised, promisedWrite, accepted, committed);
}
public static int legacyPaxosTtlSec(TableMetadata metadata)
{
// keep paxos state around for at least 3h
return Math.max(3 * 3600, metadata.params.gcGraceSeconds);
}
public static void savePaxosWritePromise(DecoratedKey key, TableMetadata metadata, Ballot ballot)
{
if (paxosStatePurging() == legacy)
{
String cql = "UPDATE system." + PAXOS + " USING TIMESTAMP ? AND TTL ? SET in_progress_ballot = ? WHERE row_key = ? AND cf_id = ?";
executeInternal(cql,
ballot.unixMicros(),
legacyPaxosTtlSec(metadata),
ballot,
key.getKey(),
metadata.id.asUUID());
}
else
{
String cql = "UPDATE system." + PAXOS + " USING TIMESTAMP ? SET in_progress_ballot = ? WHERE row_key = ? AND cf_id = ?";
executeInternal(cql,
ballot.unixMicros(),
ballot,
key.getKey(),
metadata.id.asUUID());
}
}
public static void savePaxosReadPromise(DecoratedKey key, TableMetadata metadata, Ballot ballot)
{
if (paxosStatePurging() == legacy)
{
String cql = "UPDATE system." + PAXOS + " USING TIMESTAMP ? AND TTL ? SET in_progress_read_ballot = ? WHERE row_key = ? AND cf_id = ?";
executeInternal(cql,
ballot.unixMicros(),
legacyPaxosTtlSec(metadata),
ballot,
key.getKey(),
metadata.id.asUUID());
}
else
{
String cql = "UPDATE system." + PAXOS + " USING TIMESTAMP ? SET in_progress_read_ballot = ? WHERE row_key = ? AND cf_id = ?";
executeInternal(cql,
ballot.unixMicros(),
ballot,
key.getKey(),
metadata.id.asUUID());
}
}
public static void savePaxosProposal(Commit proposal)
{
if (proposal instanceof AcceptedWithTTL)
{
long localDeletionTime = ((Commit.AcceptedWithTTL) proposal).localDeletionTime;
int ttlInSec = legacyPaxosTtlSec(proposal.update.metadata());
long nowInSec = localDeletionTime - ttlInSec;
String cql = "UPDATE system." + PAXOS + " USING TIMESTAMP ? AND TTL ? SET proposal_ballot = ?, proposal = ?, proposal_version = ? WHERE row_key = ? AND cf_id = ?";
executeInternalWithNowInSec(cql,
nowInSec,
proposal.ballot.unixMicros(),
ttlInSec,
proposal.ballot,
PartitionUpdate.toBytes(proposal.update, MessagingService.current_version),
MessagingService.current_version,
proposal.update.partitionKey().getKey(),
proposal.update.metadata().id.asUUID());
}
else
{
String cql = "UPDATE system." + PAXOS + " USING TIMESTAMP ? SET proposal_ballot = ?, proposal = ?, proposal_version = ? WHERE row_key = ? AND cf_id = ?";
executeInternal(cql,
proposal.ballot.unixMicros(),
proposal.ballot,
PartitionUpdate.toBytes(proposal.update, MessagingService.current_version),
MessagingService.current_version,
proposal.update.partitionKey().getKey(),
proposal.update.metadata().id.asUUID());
}
}
public static void savePaxosCommit(Commit commit)
{
// We always erase the last proposal (with the commit timestamp to no erase more recent proposal in case the commit is old)
// even though that's really just an optimization since SP.beginAndRepairPaxos will exclude accepted proposal older than the mrc.
if (commit instanceof Commit.CommittedWithTTL)
{
long localDeletionTime = ((Commit.CommittedWithTTL) commit).localDeletionTime;
int ttlInSec = legacyPaxosTtlSec(commit.update.metadata());
long nowInSec = localDeletionTime - ttlInSec;
String cql = "UPDATE system." + PAXOS + " USING TIMESTAMP ? AND TTL ? SET proposal_ballot = null, proposal = null, proposal_version = null, most_recent_commit_at = ?, most_recent_commit = ?, most_recent_commit_version = ? WHERE row_key = ? AND cf_id = ?";
executeInternalWithNowInSec(cql,
nowInSec,
commit.ballot.unixMicros(),
ttlInSec,
commit.ballot,
PartitionUpdate.toBytes(commit.update, MessagingService.current_version),
MessagingService.current_version,
commit.update.partitionKey().getKey(),
commit.update.metadata().id.asUUID());
}
else
{
String cql = "UPDATE system." + PAXOS + " USING TIMESTAMP ? SET proposal_ballot = null, proposal = null, proposal_version = null, most_recent_commit_at = ?, most_recent_commit = ?, most_recent_commit_version = ? WHERE row_key = ? AND cf_id = ?";
executeInternal(cql,
commit.ballot.unixMicros(),
commit.ballot,
PartitionUpdate.toBytes(commit.update, MessagingService.current_version),
MessagingService.current_version,
commit.update.partitionKey().getKey(),
commit.update.metadata().id.asUUID());
}
}
@VisibleForTesting
public static void savePaxosRepairHistory(String keyspace, String table, PaxosRepairHistory history, boolean flush)
{
String cql = "INSERT INTO system.%s (keyspace_name, table_name, points) VALUES (?, ?, ?)";
executeInternal(String.format(cql, PAXOS_REPAIR_HISTORY), keyspace, table, history.toTupleBufferList());
if (flush)
flushPaxosRepairHistory();
}
public static void flushPaxosRepairHistory()
{
Schema.instance.getColumnFamilyStoreInstance(PaxosRepairHistoryTable.id)
.forceBlockingFlush(ColumnFamilyStore.FlushReason.INTERNALLY_FORCED);
}
public static PaxosRepairHistory loadPaxosRepairHistory(String keyspace, String table)
{
if (SchemaConstants.LOCAL_SYSTEM_KEYSPACE_NAMES.contains(keyspace))
return PaxosRepairHistory.EMPTY;
UntypedResultSet results = executeInternal(String.format("SELECT * FROM system.%s WHERE keyspace_name=? AND table_name=?", PAXOS_REPAIR_HISTORY), keyspace, table);
if (results.isEmpty())
return PaxosRepairHistory.EMPTY;
UntypedResultSet.Row row = Iterables.getOnlyElement(results);
List points = row.getList("points", BytesType.instance);
return PaxosRepairHistory.fromTupleBufferList(points);
}
/**
* Returns a RestorableMeter tracking the average read rate of a particular SSTable, restoring the last-seen rate
* from values in system.sstable_activity if present.
* @param keyspace the keyspace the sstable belongs to
* @param table the table the sstable belongs to
* @param id the generation id for the sstable
*/
public static RestorableMeter getSSTableReadMeter(String keyspace, String table, SSTableId id)
{
UntypedResultSet results = readSSTableActivity(keyspace, table, id);
if (results.isEmpty())
return new RestorableMeter();
UntypedResultSet.Row row = results.one();
double m15rate = row.getDouble("rate_15m");
double m120rate = row.getDouble("rate_120m");
return new RestorableMeter(m15rate, m120rate);
}
@VisibleForTesting
public static UntypedResultSet readSSTableActivity(String keyspace, String table, SSTableId id)
{
String cql = "SELECT * FROM system.%s WHERE keyspace_name=? and table_name=? and id=?";
return executeInternal(format(cql, SSTABLE_ACTIVITY_V2), keyspace, table, id.toString());
}
/**
* Writes the current read rates for a given SSTable to system.sstable_activity
*/
public static void persistSSTableReadMeter(String keyspace, String table, SSTableId id, RestorableMeter meter)
{
// Store values with a one-day TTL to handle corner cases where cleanup might not occur
String cql = "INSERT INTO system.%s (keyspace_name, table_name, id, rate_15m, rate_120m) VALUES (?, ?, ?, ?, ?) USING TTL 864000";
executeInternal(format(cql, SSTABLE_ACTIVITY_V2),
keyspace,
table,
id.toString(),
meter.fifteenMinuteRate(),
meter.twoHourRate());
if (!DatabaseDescriptor.isUUIDSSTableIdentifiersEnabled() && id instanceof SequenceBasedSSTableId)
{
// we do this in order to make it possible to downgrade until we switch in cassandra.yaml to UUID based ids
// see the discussion on CASSANDRA-17048
cql = "INSERT INTO system.%s (keyspace_name, columnfamily_name, generation, rate_15m, rate_120m) VALUES (?, ?, ?, ?, ?) USING TTL 864000";
executeInternal(format(cql, LEGACY_SSTABLE_ACTIVITY),
keyspace,
table,
((SequenceBasedSSTableId) id).generation,
meter.fifteenMinuteRate(),
meter.twoHourRate());
}
}
/**
* Clears persisted read rates from system.sstable_activity for SSTables that have been deleted.
*/
public static void clearSSTableReadMeter(String keyspace, String table, SSTableId id)
{
String cql = "DELETE FROM system.%s WHERE keyspace_name=? AND table_name=? and id=?";
executeInternal(format(cql, SSTABLE_ACTIVITY_V2), keyspace, table, id.toString());
if (!DatabaseDescriptor.isUUIDSSTableIdentifiersEnabled() && id instanceof SequenceBasedSSTableId)
{
// we do this in order to make it possible to downgrade until we switch in cassandra.yaml to UUID based ids
// see the discussion on CASSANDRA-17048
cql = "DELETE FROM system.%s WHERE keyspace_name=? AND columnfamily_name=? and generation=?";
executeInternal(format(cql, LEGACY_SSTABLE_ACTIVITY), keyspace, table, ((SequenceBasedSSTableId) id).generation);
}
}
/**
* Writes the current partition count and size estimates into SIZE_ESTIMATES_CF
*/
public static void updateSizeEstimates(String keyspace, String table, Map, Pair> estimates)
{
long timestamp = FBUtilities.timestampMicros();
long nowInSec = FBUtilities.nowInSeconds();
PartitionUpdate.Builder update = new PartitionUpdate.Builder(LegacySizeEstimates, UTF8Type.instance.decompose(keyspace), LegacySizeEstimates.regularAndStaticColumns(), estimates.size());
// delete all previous values with a single range tombstone.
update.add(new RangeTombstone(Slice.make(LegacySizeEstimates.comparator, table), DeletionTime.build(timestamp - 1, nowInSec)));
// add a CQL row for each primary token range.
for (Map.Entry, Pair> entry : estimates.entrySet())
{
Range range = entry.getKey();
Pair values = entry.getValue();
update.add(Rows.simpleBuilder(LegacySizeEstimates, table, range.left.toString(), range.right.toString())
.timestamp(timestamp)
.add("partitions_count", values.left)
.add("mean_partition_size", values.right)
.build());
}
new Mutation(update.build()).apply();
}
/**
* Writes the current partition count and size estimates into table_estimates
*/
public static void updateTableEstimates(String keyspace, String table, String type, Map, Pair> estimates)
{
long timestamp = FBUtilities.timestampMicros();
long nowInSec = FBUtilities.nowInSeconds();
PartitionUpdate.Builder update = new PartitionUpdate.Builder(TableEstimates, UTF8Type.instance.decompose(keyspace), TableEstimates.regularAndStaticColumns(), estimates.size());
// delete all previous values with a single range tombstone.
update.add(new RangeTombstone(Slice.make(TableEstimates.comparator, table, type), DeletionTime.build(timestamp - 1, nowInSec)));
// add a CQL row for each primary token range.
for (Map.Entry, Pair> entry : estimates.entrySet())
{
Range range = entry.getKey();
Pair values = entry.getValue();
update.add(Rows.simpleBuilder(TableEstimates, table, type, range.left.toString(), range.right.toString())
.timestamp(timestamp)
.add("partitions_count", values.left)
.add("mean_partition_size", values.right)
.build());
}
new Mutation(update.build()).apply();
}
/**
* Clears size estimates for a table (on table drop)
*/
public static void clearEstimates(String keyspace, String table)
{
String cqlFormat = "DELETE FROM %s WHERE keyspace_name = ? AND table_name = ?";
String cql = format(cqlFormat, LegacySizeEstimates.toString());
executeInternal(cql, keyspace, table);
cql = String.format(cqlFormat, TableEstimates.toString());
executeInternal(cql, keyspace, table);
}
/**
* truncates size_estimates and table_estimates tables
*/
public static void clearAllEstimates()
{
for (String table : Arrays.asList(LEGACY_SIZE_ESTIMATES, TABLE_ESTIMATES))
{
ColumnFamilyStore cfs = Keyspace.open(SchemaConstants.SYSTEM_KEYSPACE_NAME).getColumnFamilyStore(table);
cfs.truncateBlockingWithoutSnapshot();
}
}
public static synchronized void updateAvailableRanges(String keyspace, Collection> completedFullRanges, Collection> completedTransientRanges)
{
String cql = "UPDATE system.%s SET full_ranges = full_ranges + ?, transient_ranges = transient_ranges + ? WHERE keyspace_name = ?";
executeInternal(format(cql, AVAILABLE_RANGES_V2),
completedFullRanges.stream().map(SystemKeyspace::rangeToBytes).collect(Collectors.toSet()),
completedTransientRanges.stream().map(SystemKeyspace::rangeToBytes).collect(Collectors.toSet()),
keyspace);
}
/**
* List of the streamed ranges, where transientness is encoded based on the source, where range was streamed from.
*/
public static synchronized AvailableRanges getAvailableRanges(String keyspace, IPartitioner partitioner)
{
String query = "SELECT * FROM system.%s WHERE keyspace_name=?";
UntypedResultSet rs = executeInternal(format(query, AVAILABLE_RANGES_V2), keyspace);
ImmutableSet.Builder> full = new ImmutableSet.Builder<>();
ImmutableSet.Builder> trans = new ImmutableSet.Builder<>();
for (UntypedResultSet.Row row : rs)
{
Optional.ofNullable(row.getSet("full_ranges", BytesType.instance))
.ifPresent(full_ranges -> full_ranges.stream()
.map(buf -> byteBufferToRange(buf, partitioner))
.forEach(full::add));
Optional.ofNullable(row.getSet("transient_ranges", BytesType.instance))
.ifPresent(transient_ranges -> transient_ranges.stream()
.map(buf -> byteBufferToRange(buf, partitioner))
.forEach(trans::add));
}
return new AvailableRanges(full.build(), trans.build());
}
public static class AvailableRanges
{
public Set> full;
public Set> trans;
private AvailableRanges(Set> full, Set> trans)
{
this.full = full;
this.trans = trans;
}
}
public static void resetAvailableStreamedRanges()
{
ColumnFamilyStore availableRanges = Keyspace.open(SchemaConstants.SYSTEM_KEYSPACE_NAME).getColumnFamilyStore(AVAILABLE_RANGES_V2);
availableRanges.truncateBlockingWithoutSnapshot();
}
public static void resetAvailableStreamedRangesForKeyspace(String keyspace)
{
String cql = "DELETE FROM %s.%s WHERE keyspace_name = ?";
executeInternal(format(cql, SchemaConstants.SYSTEM_KEYSPACE_NAME, AVAILABLE_RANGES_V2), keyspace);
}
public static synchronized void updateTransferredRanges(StreamOperation streamOperation,
InetAddressAndPort peer,
String keyspace,
Collection> streamedRanges)
{
String cql = "UPDATE system.%s SET ranges = ranges + ? WHERE operation = ? AND peer = ? AND keyspace_name = ?";
Set rangesToUpdate = new HashSet<>(streamedRanges.size());
for (Range range : streamedRanges)
{
rangesToUpdate.add(rangeToBytes(range));
}
executeInternal(format(cql, LEGACY_TRANSFERRED_RANGES), rangesToUpdate, streamOperation.getDescription(), peer.getAddress(), keyspace);
cql = "UPDATE system.%s SET ranges = ranges + ? WHERE operation = ? AND peer = ? AND peer_port = ? AND keyspace_name = ?";
executeInternal(String.format(cql, TRANSFERRED_RANGES_V2), rangesToUpdate, streamOperation.getDescription(), peer.getAddress(), peer.getPort(), keyspace);
}
public static synchronized Map>> getTransferredRanges(String description, String keyspace, IPartitioner partitioner)
{
Map>> result = new HashMap<>();
String query = "SELECT * FROM system.%s WHERE operation = ? AND keyspace_name = ?";
UntypedResultSet rs = executeInternal(String.format(query, TRANSFERRED_RANGES_V2), description, keyspace);
for (UntypedResultSet.Row row : rs)
{
InetAddress peerAddress = row.getInetAddress("peer");
int port = row.getInt("peer_port");
InetAddressAndPort peer = InetAddressAndPort.getByAddressOverrideDefaults(peerAddress, port);
Set rawRanges = row.getSet("ranges", BytesType.instance);
Set> ranges = Sets.newHashSetWithExpectedSize(rawRanges.size());
for (ByteBuffer rawRange : rawRanges)
{
ranges.add(byteBufferToRange(rawRange, partitioner));
}
result.put(peer, ranges);
}
return ImmutableMap.copyOf(result);
}
/**
* Compare the release version in the system.local table with the one included in the distro.
* If they don't match, snapshot all tables in the system and schema keyspaces. This is intended
* to be called at startup to create a backup of the system tables during an upgrade
*
* @throws IOException
*/
public static void snapshotOnVersionChange() throws IOException
{
String previous = getPreviousVersionString();
String next = FBUtilities.getReleaseVersionString();
FBUtilities.setPreviousReleaseVersionString(previous);
// if we're restarting after an upgrade, snapshot the system and schema keyspaces
if (!previous.equals(NULL_VERSION.toString()) && !previous.equals(next))
{
logger.info("Detected version upgrade from {} to {}, snapshotting system keyspaces", previous, next);
String snapshotName = Keyspace.getTimestampedSnapshotName(format("upgrade-%s-%s",
previous,
next));
Instant creationTime = now();
for (String keyspace : SchemaConstants.LOCAL_SYSTEM_KEYSPACE_NAMES)
Keyspace.open(keyspace).snapshot(snapshotName, null, false, null, null, creationTime);
}
}
/**
* Try to determine what the previous version, if any, was installed on this node.
* Primary source of truth is the release version in system.local. If the previous
* version cannot be determined by looking there then either:
* * the node never had a C* install before
* * the was a very old version (pre 1.2) installed, which did not include system.local
*
* @return either a version read from the system.local table or one of two special values
* indicating either no previous version (SystemUpgrade.NULL_VERSION) or an unreadable,
* legacy version (SystemUpgrade.UNREADABLE_VERSION).
*/
private static String getPreviousVersionString()
{
String req = "SELECT release_version FROM system.%s WHERE key='%s'";
UntypedResultSet result = executeInternal(format(req, SystemKeyspace.LOCAL, SystemKeyspace.LOCAL));
if (result.isEmpty() || !result.one().has("release_version"))
{
// it isn't inconceivable that one might try to upgrade a node straight from <= 1.1 to whatever
// the current version is. If we couldn't read a previous version from system.local we check for
// the existence of the legacy system.Versions table. We don't actually attempt to read a version
// from there, but it informs us that this isn't a completely new node.
for (File dataDirectory : Directories.getKSChildDirectories(SchemaConstants.SYSTEM_KEYSPACE_NAME))
{
if (dataDirectory.name().equals("Versions") && dataDirectory.tryList().length > 0)
{
logger.trace("Found unreadable versions info in pre 1.2 system.Versions table");
return UNREADABLE_VERSION.toString();
}
}
// no previous version information found, we can assume that this is a new node
return NULL_VERSION.toString();
}
// report back whatever we found in the system table
return result.one().getString("release_version");
}
@VisibleForTesting
public static Set> rawRangesToRangeSet(Set rawRanges, IPartitioner partitioner)
{
return rawRanges.stream().map(buf -> byteBufferToRange(buf, partitioner)).collect(Collectors.toSet());
}
@VisibleForTesting
public static ByteBuffer rangeToBytes(Range range)
{
try (DataOutputBuffer out = new DataOutputBuffer())
{
// The format with which token ranges are serialized in the system tables is the pre-3.0 serialization
// formot for ranges, so we should maintain that for now. And while we don't really support pre-3.0
// messaging versions, we know AbstractBounds.Serializer still support it _exactly_ for this use case, so we
// pass 0 as the version to trigger that legacy code.
// In the future, it might be worth switching to a stable text format for the ranges to 1) save that and 2)
// be more user friendly (the serialization format we currently use is pretty custom).
Range.tokenSerializer.serialize(range, out, 0);
return out.buffer();
}
catch (IOException e)
{
throw new IOError(e);
}
}
@SuppressWarnings("unchecked")
private static Range byteBufferToRange(ByteBuffer rawRange, IPartitioner partitioner)
{
try
{
// See rangeToBytes above for why version is 0.
return (Range) Range.tokenSerializer.deserialize(ByteStreams.newDataInput(ByteBufferUtil.getArray(rawRange)),
partitioner,
0);
}
catch (IOException e)
{
throw new IOError(e);
}
}
public static void writePreparedStatement(String loggedKeyspace, MD5Digest key, String cql)
{
executeInternal(format("INSERT INTO %s (logged_keyspace, prepared_id, query_string) VALUES (?, ?, ?)",
PreparedStatements.toString()),
loggedKeyspace, key.byteBuffer(), cql);
logger.debug("stored prepared statement for logged keyspace '{}': '{}'", loggedKeyspace, cql);
}
public static void removePreparedStatement(MD5Digest key)
{
executeInternal(format("DELETE FROM %s WHERE prepared_id = ?", PreparedStatements.toString()),
key.byteBuffer());
}
public static void resetPreparedStatements()
{
ColumnFamilyStore preparedStatements = Keyspace.open(SchemaConstants.SYSTEM_KEYSPACE_NAME).getColumnFamilyStore(PREPARED_STATEMENTS);
preparedStatements.truncateBlockingWithoutSnapshot();
}
public static int loadPreparedStatements(TriFunction onLoaded)
{
String query = String.format("SELECT prepared_id, logged_keyspace, query_string FROM %s.%s", SchemaConstants.SYSTEM_KEYSPACE_NAME, PREPARED_STATEMENTS);
UntypedResultSet resultSet = executeOnceInternal(query);
int counter = 0;
for (UntypedResultSet.Row row : resultSet)
{
if (onLoaded.accept(MD5Digest.wrap(row.getByteArray("prepared_id")),
row.getString("query_string"),
row.has("logged_keyspace") ? row.getString("logged_keyspace") : null))
counter++;
}
return counter;
}
public static int loadPreparedStatement(MD5Digest digest, TriFunction onLoaded)
{
String query = String.format("SELECT prepared_id, logged_keyspace, query_string FROM %s.%s WHERE prepared_id = ?", SchemaConstants.SYSTEM_KEYSPACE_NAME, PREPARED_STATEMENTS);
UntypedResultSet resultSet = executeOnceInternal(query, digest.byteBuffer());
int counter = 0;
for (UntypedResultSet.Row row : resultSet)
{
if (onLoaded.accept(MD5Digest.wrap(row.getByteArray("prepared_id")),
row.getString("query_string"),
row.has("logged_keyspace") ? row.getString("logged_keyspace") : null))
counter++;
}
return counter;
}
public static interface TriFunction {
D accept(A var1, B var2, C var3);
}
public static void saveTopPartitions(TableMetadata metadata, String topType, Collection topPartitions, long lastUpdate)
{
String cql = String.format("INSERT INTO %s.%s (keyspace_name, table_name, top_type, top, last_update) values (?, ?, ?, ?, ?)", SchemaConstants.SYSTEM_KEYSPACE_NAME, TOP_PARTITIONS);
List tupleList = new ArrayList<>(topPartitions.size());
topPartitions.forEach(tp -> {
String key = metadata.partitionKeyType.getString(tp.key.getKey());
tupleList.add(TupleType.buildValue(new ByteBuffer[] { UTF8Type.instance.decompose(key),
LongType.instance.decompose(tp.value)}));
});
executeInternal(cql, metadata.keyspace, metadata.name, topType, tupleList, Date.from(Instant.ofEpochMilli(lastUpdate)));
}
public static TopPartitionTracker.StoredTopPartitions getTopPartitions(TableMetadata metadata, String topType)
{
try
{
String cql = String.format("SELECT top, last_update FROM %s.%s WHERE keyspace_name = ? and table_name = ? and top_type = ?", SchemaConstants.SYSTEM_KEYSPACE_NAME, TOP_PARTITIONS);
UntypedResultSet res = executeInternal(cql, metadata.keyspace, metadata.name, topType);
if (res == null || res.isEmpty())
return TopPartitionTracker.StoredTopPartitions.EMPTY;
UntypedResultSet.Row row = res.one();
long lastUpdated = row.getLong("last_update");
List top = row.getList("top", BytesType.instance);
if (top == null || top.isEmpty())
return TopPartitionTracker.StoredTopPartitions.EMPTY;
List topPartitions = new ArrayList<>(top.size());
TupleType tupleType = new TupleType(Lists.newArrayList(UTF8Type.instance, LongType.instance));
for (ByteBuffer bb : top)
{
ByteBuffer[] components = tupleType.split(ByteBufferAccessor.instance, bb);
String keyStr = UTF8Type.instance.compose(components[0]);
long value = LongType.instance.compose(components[1]);
topPartitions.add(new TopPartitionTracker.TopPartition(metadata.partitioner.decorateKey(metadata.partitionKeyType.fromString(keyStr)), value));
}
return new TopPartitionTracker.StoredTopPartitions(topPartitions, lastUpdated);
}
catch (Exception e)
{
logger.warn("Could not load stored top {} partitions for {}.{}", topType, metadata.keyspace, metadata.name, e);
return TopPartitionTracker.StoredTopPartitions.EMPTY;
}
}
}