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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.net;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.function.Supplier;
import java.util.function.ToLongFunction;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.ImmutableList;
import org.apache.cassandra.batchlog.Batch;
import org.apache.cassandra.batchlog.BatchRemoveVerbHandler;
import org.apache.cassandra.batchlog.BatchStoreVerbHandler;
import org.apache.cassandra.concurrent.Stage;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.db.CounterMutation;
import org.apache.cassandra.db.CounterMutationVerbHandler;
import org.apache.cassandra.db.Mutation;
import org.apache.cassandra.db.MutationVerbHandler;
import org.apache.cassandra.db.ReadCommand;
import org.apache.cassandra.db.ReadCommandVerbHandler;
import org.apache.cassandra.db.ReadRepairVerbHandler;
import org.apache.cassandra.db.ReadResponse;
import org.apache.cassandra.db.SnapshotCommand;
import org.apache.cassandra.db.TruncateResponse;
import org.apache.cassandra.db.TruncateVerbHandler;
import org.apache.cassandra.db.TruncateRequest;
import org.apache.cassandra.exceptions.RequestFailureReason;
import org.apache.cassandra.gms.GossipDigestAck;
import org.apache.cassandra.gms.GossipDigestAck2;
import org.apache.cassandra.gms.GossipDigestAck2VerbHandler;
import org.apache.cassandra.gms.GossipDigestAckVerbHandler;
import org.apache.cassandra.gms.GossipDigestSyn;
import org.apache.cassandra.gms.GossipDigestSynVerbHandler;
import org.apache.cassandra.gms.GossipShutdownVerbHandler;
import org.apache.cassandra.hints.HintMessage;
import org.apache.cassandra.hints.HintVerbHandler;
import org.apache.cassandra.io.IVersionedAsymmetricSerializer;
import org.apache.cassandra.repair.RepairMessageVerbHandler;
import org.apache.cassandra.repair.messages.CleanupMessage;
import org.apache.cassandra.repair.messages.FailSession;
import org.apache.cassandra.repair.messages.FinalizeCommit;
import org.apache.cassandra.repair.messages.FinalizePromise;
import org.apache.cassandra.repair.messages.FinalizePropose;
import org.apache.cassandra.repair.messages.PrepareConsistentRequest;
import org.apache.cassandra.repair.messages.PrepareConsistentResponse;
import org.apache.cassandra.repair.messages.PrepareMessage;
import org.apache.cassandra.repair.messages.SnapshotMessage;
import org.apache.cassandra.repair.messages.StatusRequest;
import org.apache.cassandra.repair.messages.StatusResponse;
import org.apache.cassandra.repair.messages.SyncResponse;
import org.apache.cassandra.repair.messages.SyncRequest;
import org.apache.cassandra.repair.messages.ValidationResponse;
import org.apache.cassandra.repair.messages.ValidationRequest;
import org.apache.cassandra.schema.SchemaMutationsSerializer;
import org.apache.cassandra.schema.SchemaPullVerbHandler;
import org.apache.cassandra.schema.SchemaPushVerbHandler;
import org.apache.cassandra.schema.SchemaVersionVerbHandler;
import org.apache.cassandra.service.paxos.PaxosCommit;
import org.apache.cassandra.service.paxos.PaxosCommitAndPrepare;
import org.apache.cassandra.service.paxos.PaxosPrepare;
import org.apache.cassandra.service.paxos.PaxosPrepareRefresh;
import org.apache.cassandra.service.paxos.PaxosPropose;
import org.apache.cassandra.service.paxos.PaxosRepair;
import org.apache.cassandra.service.paxos.cleanup.PaxosCleanupHistory;
import org.apache.cassandra.service.paxos.cleanup.PaxosCleanupRequest;
import org.apache.cassandra.service.paxos.cleanup.PaxosCleanupResponse;
import org.apache.cassandra.service.paxos.cleanup.PaxosCleanupComplete;
import org.apache.cassandra.service.paxos.cleanup.PaxosStartPrepareCleanup;
import org.apache.cassandra.service.paxos.cleanup.PaxosFinishPrepareCleanup;
import org.apache.cassandra.utils.BooleanSerializer;
import org.apache.cassandra.service.EchoVerbHandler;
import org.apache.cassandra.service.SnapshotVerbHandler;
import org.apache.cassandra.service.paxos.Commit;
import org.apache.cassandra.service.paxos.Commit.Agreed;
import org.apache.cassandra.service.paxos.PrepareResponse;
import org.apache.cassandra.service.paxos.v1.PrepareVerbHandler;
import org.apache.cassandra.service.paxos.v1.ProposeVerbHandler;
import org.apache.cassandra.streaming.ReplicationDoneVerbHandler;
import org.apache.cassandra.utils.ReflectionUtils;
import org.apache.cassandra.utils.TimeUUID;
import org.apache.cassandra.utils.UUIDSerializer;
import static java.util.concurrent.TimeUnit.NANOSECONDS;
import static org.apache.cassandra.concurrent.Stage.*;
import static org.apache.cassandra.net.VerbTimeouts.*;
import static org.apache.cassandra.net.Verb.Kind.*;
import static org.apache.cassandra.net.Verb.Priority.*;
/**
* Note that priorities except P0 are presently unused. P0 corresponds to urgent, i.e. what used to be the "Gossip" connection.
*/
public enum Verb
{
MUTATION_RSP (60, P1, writeTimeout, REQUEST_RESPONSE, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
MUTATION_REQ (0, P3, writeTimeout, MUTATION, () -> Mutation.serializer, () -> MutationVerbHandler.instance, MUTATION_RSP ),
HINT_RSP (61, P1, writeTimeout, REQUEST_RESPONSE, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
HINT_REQ (1, P4, writeTimeout, MUTATION, () -> HintMessage.serializer, () -> HintVerbHandler.instance, HINT_RSP ),
READ_REPAIR_RSP (62, P1, writeTimeout, REQUEST_RESPONSE, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
READ_REPAIR_REQ (2, P1, writeTimeout, MUTATION, () -> Mutation.serializer, () -> ReadRepairVerbHandler.instance, READ_REPAIR_RSP ),
BATCH_STORE_RSP (65, P1, writeTimeout, REQUEST_RESPONSE, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
BATCH_STORE_REQ (5, P3, writeTimeout, MUTATION, () -> Batch.serializer, () -> BatchStoreVerbHandler.instance, BATCH_STORE_RSP ),
BATCH_REMOVE_RSP (66, P1, writeTimeout, REQUEST_RESPONSE, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
BATCH_REMOVE_REQ (6, P3, writeTimeout, MUTATION, () -> TimeUUID.Serializer.instance, () -> BatchRemoveVerbHandler.instance, BATCH_REMOVE_RSP ),
PAXOS_PREPARE_RSP (93, P2, writeTimeout, REQUEST_RESPONSE, () -> PrepareResponse.serializer, () -> ResponseVerbHandler.instance ),
PAXOS_PREPARE_REQ (33, P2, writeTimeout, MUTATION, () -> Commit.serializer, () -> PrepareVerbHandler.instance, PAXOS_PREPARE_RSP ),
PAXOS_PROPOSE_RSP (94, P2, writeTimeout, REQUEST_RESPONSE, () -> BooleanSerializer.serializer, () -> ResponseVerbHandler.instance ),
PAXOS_PROPOSE_REQ (34, P2, writeTimeout, MUTATION, () -> Commit.serializer, () -> ProposeVerbHandler.instance, PAXOS_PROPOSE_RSP ),
PAXOS_COMMIT_RSP (95, P2, writeTimeout, REQUEST_RESPONSE, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
PAXOS_COMMIT_REQ (35, P2, writeTimeout, MUTATION, () -> Agreed.serializer, () -> PaxosCommit.requestHandler, PAXOS_COMMIT_RSP ),
TRUNCATE_RSP (79, P0, truncateTimeout, REQUEST_RESPONSE, () -> TruncateResponse.serializer, () -> ResponseVerbHandler.instance ),
TRUNCATE_REQ (19, P0, truncateTimeout, MUTATION, () -> TruncateRequest.serializer, () -> TruncateVerbHandler.instance, TRUNCATE_RSP ),
COUNTER_MUTATION_RSP (84, P1, counterTimeout, REQUEST_RESPONSE, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
COUNTER_MUTATION_REQ (24, P2, counterTimeout, COUNTER_MUTATION, () -> CounterMutation.serializer, () -> CounterMutationVerbHandler.instance, COUNTER_MUTATION_RSP),
READ_RSP (63, P2, readTimeout, REQUEST_RESPONSE, () -> ReadResponse.serializer, () -> ResponseVerbHandler.instance ),
READ_REQ (3, P3, readTimeout, READ, () -> ReadCommand.serializer, () -> ReadCommandVerbHandler.instance, READ_RSP ),
RANGE_RSP (69, P2, rangeTimeout, REQUEST_RESPONSE, () -> ReadResponse.serializer, () -> ResponseVerbHandler.instance ),
RANGE_REQ (9, P3, rangeTimeout, READ, () -> ReadCommand.serializer, () -> ReadCommandVerbHandler.instance, RANGE_RSP ),
GOSSIP_DIGEST_SYN (14, P0, longTimeout, GOSSIP, () -> GossipDigestSyn.serializer, () -> GossipDigestSynVerbHandler.instance ),
GOSSIP_DIGEST_ACK (15, P0, longTimeout, GOSSIP, () -> GossipDigestAck.serializer, () -> GossipDigestAckVerbHandler.instance ),
GOSSIP_DIGEST_ACK2 (16, P0, longTimeout, GOSSIP, () -> GossipDigestAck2.serializer, () -> GossipDigestAck2VerbHandler.instance ),
GOSSIP_SHUTDOWN (29, P0, rpcTimeout, GOSSIP, () -> NoPayload.serializer, () -> GossipShutdownVerbHandler.instance ),
ECHO_RSP (91, P0, rpcTimeout, GOSSIP, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
ECHO_REQ (31, P0, rpcTimeout, GOSSIP, () -> NoPayload.serializer, () -> EchoVerbHandler.instance, ECHO_RSP ),
PING_RSP (97, P1, pingTimeout, GOSSIP, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
PING_REQ (37, P1, pingTimeout, GOSSIP, () -> PingRequest.serializer, () -> PingVerbHandler.instance, PING_RSP ),
// P1 because messages can be arbitrarily large or aren't crucial
SCHEMA_PUSH_RSP (98, P1, rpcTimeout, MIGRATION, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
SCHEMA_PUSH_REQ (18, P1, rpcTimeout, MIGRATION, () -> SchemaMutationsSerializer.instance, () -> SchemaPushVerbHandler.instance, SCHEMA_PUSH_RSP ),
SCHEMA_PULL_RSP (88, P1, rpcTimeout, MIGRATION, () -> SchemaMutationsSerializer.instance, () -> ResponseVerbHandler.instance ),
SCHEMA_PULL_REQ (28, P1, rpcTimeout, MIGRATION, () -> NoPayload.serializer, () -> SchemaPullVerbHandler.instance, SCHEMA_PULL_RSP ),
SCHEMA_VERSION_RSP (80, P1, rpcTimeout, MIGRATION, () -> UUIDSerializer.serializer, () -> ResponseVerbHandler.instance ),
SCHEMA_VERSION_REQ (20, P1, rpcTimeout, MIGRATION, () -> NoPayload.serializer, () -> SchemaVersionVerbHandler.instance, SCHEMA_VERSION_RSP ),
// repair; mostly doesn't use callbacks and sends responses as their own request messages, with matching sessions by uuid; should eventually harmonize and make idiomatic
REPAIR_RSP (100, P1, repairTimeout, REQUEST_RESPONSE, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
VALIDATION_RSP (102, P1, longTimeout, ANTI_ENTROPY, () -> ValidationResponse.serializer, () -> RepairMessageVerbHandler.instance, REPAIR_RSP ),
VALIDATION_REQ (101, P1, repairTimeout, ANTI_ENTROPY, () -> ValidationRequest.serializer, () -> RepairMessageVerbHandler.instance, REPAIR_RSP ),
SYNC_RSP (104, P1, repairTimeout, ANTI_ENTROPY, () -> SyncResponse.serializer, () -> RepairMessageVerbHandler.instance, REPAIR_RSP ),
SYNC_REQ (103, P1, repairTimeout, ANTI_ENTROPY, () -> SyncRequest.serializer, () -> RepairMessageVerbHandler.instance, REPAIR_RSP ),
PREPARE_MSG (105, P1, repairTimeout, ANTI_ENTROPY, () -> PrepareMessage.serializer, () -> RepairMessageVerbHandler.instance, REPAIR_RSP ),
SNAPSHOT_MSG (106, P1, repairTimeout, ANTI_ENTROPY, () -> SnapshotMessage.serializer, () -> RepairMessageVerbHandler.instance, REPAIR_RSP ),
CLEANUP_MSG (107, P1, repairTimeout, ANTI_ENTROPY, () -> CleanupMessage.serializer, () -> RepairMessageVerbHandler.instance, REPAIR_RSP ),
PREPARE_CONSISTENT_RSP (109, P1, repairTimeout, ANTI_ENTROPY, () -> PrepareConsistentResponse.serializer, () -> RepairMessageVerbHandler.instance, REPAIR_RSP ),
PREPARE_CONSISTENT_REQ (108, P1, repairTimeout, ANTI_ENTROPY, () -> PrepareConsistentRequest.serializer, () -> RepairMessageVerbHandler.instance, REPAIR_RSP ),
FINALIZE_PROPOSE_MSG (110, P1, repairTimeout, ANTI_ENTROPY, () -> FinalizePropose.serializer, () -> RepairMessageVerbHandler.instance, REPAIR_RSP ),
FINALIZE_PROMISE_MSG (111, P1, repairTimeout, ANTI_ENTROPY, () -> FinalizePromise.serializer, () -> RepairMessageVerbHandler.instance, REPAIR_RSP ),
FINALIZE_COMMIT_MSG (112, P1, repairTimeout, ANTI_ENTROPY, () -> FinalizeCommit.serializer, () -> RepairMessageVerbHandler.instance, REPAIR_RSP ),
FAILED_SESSION_MSG (113, P1, repairTimeout, ANTI_ENTROPY, () -> FailSession.serializer, () -> RepairMessageVerbHandler.instance, REPAIR_RSP ),
STATUS_RSP (115, P1, repairTimeout, ANTI_ENTROPY, () -> StatusResponse.serializer, () -> RepairMessageVerbHandler.instance, REPAIR_RSP ),
STATUS_REQ (114, P1, repairTimeout, ANTI_ENTROPY, () -> StatusRequest.serializer, () -> RepairMessageVerbHandler.instance, REPAIR_RSP ),
REPLICATION_DONE_RSP (82, P0, rpcTimeout, MISC, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
REPLICATION_DONE_REQ (22, P0, rpcTimeout, MISC, () -> NoPayload.serializer, () -> ReplicationDoneVerbHandler.instance, REPLICATION_DONE_RSP),
SNAPSHOT_RSP (87, P0, rpcTimeout, MISC, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
SNAPSHOT_REQ (27, P0, rpcTimeout, MISC, () -> SnapshotCommand.serializer, () -> SnapshotVerbHandler.instance, SNAPSHOT_RSP ),
PAXOS2_COMMIT_REMOTE_REQ (38, P2, writeTimeout, MUTATION, () -> Mutation.serializer, () -> MutationVerbHandler.instance, MUTATION_RSP ),
PAXOS2_COMMIT_REMOTE_RSP (39, P2, writeTimeout, REQUEST_RESPONSE, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
PAXOS2_PREPARE_RSP (50, P2, writeTimeout, REQUEST_RESPONSE, () -> PaxosPrepare.responseSerializer, () -> ResponseVerbHandler.instance ),
PAXOS2_PREPARE_REQ (40, P2, writeTimeout, MUTATION, () -> PaxosPrepare.requestSerializer, () -> PaxosPrepare.requestHandler, PAXOS2_PREPARE_RSP ),
PAXOS2_PREPARE_REFRESH_RSP (51, P2, writeTimeout, REQUEST_RESPONSE, () -> PaxosPrepareRefresh.responseSerializer, () -> ResponseVerbHandler.instance ),
PAXOS2_PREPARE_REFRESH_REQ (41, P2, writeTimeout, MUTATION, () -> PaxosPrepareRefresh.requestSerializer, () -> PaxosPrepareRefresh.requestHandler, PAXOS2_PREPARE_REFRESH_RSP ),
PAXOS2_PROPOSE_RSP (52, P2, writeTimeout, REQUEST_RESPONSE, () -> PaxosPropose.responseSerializer, () -> ResponseVerbHandler.instance ),
PAXOS2_PROPOSE_REQ (42, P2, writeTimeout, MUTATION, () -> PaxosPropose.requestSerializer, () -> PaxosPropose.requestHandler, PAXOS2_PROPOSE_RSP ),
PAXOS2_COMMIT_AND_PREPARE_RSP (53, P2, writeTimeout, REQUEST_RESPONSE, () -> PaxosPrepare.responseSerializer, () -> ResponseVerbHandler.instance ),
PAXOS2_COMMIT_AND_PREPARE_REQ (43, P2, writeTimeout, MUTATION, () -> PaxosCommitAndPrepare.requestSerializer, () -> PaxosCommitAndPrepare.requestHandler, PAXOS2_COMMIT_AND_PREPARE_RSP ),
PAXOS2_REPAIR_RSP (54, P2, writeTimeout, PAXOS_REPAIR, () -> PaxosRepair.responseSerializer, () -> ResponseVerbHandler.instance ),
PAXOS2_REPAIR_REQ (44, P2, writeTimeout, PAXOS_REPAIR, () -> PaxosRepair.requestSerializer, () -> PaxosRepair.requestHandler, PAXOS2_REPAIR_RSP ),
PAXOS2_CLEANUP_START_PREPARE_RSP (55, P2, repairTimeout, PAXOS_REPAIR, () -> PaxosCleanupHistory.serializer, () -> ResponseVerbHandler.instance ),
PAXOS2_CLEANUP_START_PREPARE_REQ (45, P2, repairTimeout, PAXOS_REPAIR, () -> PaxosStartPrepareCleanup.serializer, () -> PaxosStartPrepareCleanup.verbHandler, PAXOS2_CLEANUP_START_PREPARE_RSP ),
PAXOS2_CLEANUP_RSP (56, P2, repairTimeout, PAXOS_REPAIR, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
PAXOS2_CLEANUP_REQ (46, P2, repairTimeout, PAXOS_REPAIR, () -> PaxosCleanupRequest.serializer, () -> PaxosCleanupRequest.verbHandler, PAXOS2_CLEANUP_RSP ),
PAXOS2_CLEANUP_RSP2 (57, P2, repairTimeout, PAXOS_REPAIR, () -> PaxosCleanupResponse.serializer, () -> PaxosCleanupResponse.verbHandler ),
PAXOS2_CLEANUP_FINISH_PREPARE_RSP(58, P2, repairTimeout, PAXOS_REPAIR, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
PAXOS2_CLEANUP_FINISH_PREPARE_REQ(47, P2, repairTimeout, IMMEDIATE, () -> PaxosCleanupHistory.serializer, () -> PaxosFinishPrepareCleanup.verbHandler, PAXOS2_CLEANUP_FINISH_PREPARE_RSP),
PAXOS2_CLEANUP_COMPLETE_RSP (59, P2, repairTimeout, PAXOS_REPAIR, () -> NoPayload.serializer, () -> ResponseVerbHandler.instance ),
PAXOS2_CLEANUP_COMPLETE_REQ (48, P2, repairTimeout, PAXOS_REPAIR, () -> PaxosCleanupComplete.serializer, () -> PaxosCleanupComplete.verbHandler, PAXOS2_CLEANUP_COMPLETE_RSP ),
// generic failure response
FAILURE_RSP (99, P0, noTimeout, REQUEST_RESPONSE, () -> RequestFailureReason.serializer, () -> ResponseVerbHandler.instance ),
// dummy verbs
_TRACE (30, P1, rpcTimeout, TRACING, () -> NoPayload.serializer, () -> null ),
_SAMPLE (49, P1, rpcTimeout, INTERNAL_RESPONSE, () -> NoPayload.serializer, () -> null ),
_TEST_1 (10, P0, writeTimeout, IMMEDIATE, () -> NoPayload.serializer, () -> null ),
_TEST_2 (11, P1, rpcTimeout, IMMEDIATE, () -> NoPayload.serializer, () -> null ),
@Deprecated
REQUEST_RSP (4, P1, rpcTimeout, REQUEST_RESPONSE, () -> null, () -> ResponseVerbHandler.instance ),
@Deprecated
INTERNAL_RSP (23, P1, rpcTimeout, INTERNAL_RESPONSE, () -> null, () -> ResponseVerbHandler.instance ),
// largest used ID: 116
// CUSTOM VERBS
UNUSED_CUSTOM_VERB (CUSTOM,
0, P1, rpcTimeout, INTERNAL_RESPONSE, () -> null, () -> null ),
;
public static final List VERBS = ImmutableList.copyOf(Verb.values());
public enum Priority
{
P0, // sends on the urgent connection (i.e. for Gossip, Echo)
P1, // small or empty responses
P2, // larger messages that can be dropped but who have a larger impact on system stability (e.g. READ_REPAIR, READ_RSP)
P3,
P4
}
public enum Kind
{
NORMAL,
CUSTOM
}
public final int id;
public final Priority priority;
public final Stage stage;
public final Kind kind;
/**
* Messages we receive from peers have a Verb that tells us what kind of message it is.
* Most of the time, this is enough to determine how to deserialize the message payload.
* The exception is the REQUEST_RSP verb, which just means "a response to something you told me to do."
* Traditionally, this was fine since each VerbHandler knew what type of payload it expected, and
* handled the deserialization itself. Now that we do that in ITC, to avoid the extra copy to an
* intermediary byte[] (See CASSANDRA-3716), we need to wire that up to the CallbackInfo object
* (see below).
*
* NOTE: we use a Supplier to avoid loading the dependent classes until necessary.
*/
private final Supplier> serializer;
private final Supplier> handler;
public final Verb responseVerb;
private final ToLongFunction expiration;
/**
* Verbs it's okay to drop if the request has been queued longer than the request timeout. These
* all correspond to client requests or something triggered by them; we don't want to
* drop internal messages like bootstrap or repair notifications.
*/
Verb(int id, Priority priority, ToLongFunction expiration, Stage stage, Supplier> serializer, Supplier> handler)
{
this(id, priority, expiration, stage, serializer, handler, null);
}
Verb(int id, Priority priority, ToLongFunction expiration, Stage stage, Supplier> serializer, Supplier> handler, Verb responseVerb)
{
this(NORMAL, id, priority, expiration, stage, serializer, handler, responseVerb);
}
Verb(Kind kind, int id, Priority priority, ToLongFunction expiration, Stage stage, Supplier> serializer, Supplier> handler)
{
this(kind, id, priority, expiration, stage, serializer, handler, null);
}
Verb(Kind kind, int id, Priority priority, ToLongFunction expiration, Stage stage, Supplier> serializer, Supplier> handler, Verb responseVerb)
{
this.stage = stage;
if (id < 0)
throw new IllegalArgumentException("Verb id must be non-negative, got " + id + " for verb " + name());
if (kind == CUSTOM)
{
if (id > MAX_CUSTOM_VERB_ID)
throw new AssertionError("Invalid custom verb id " + id + " - we only allow custom ids between 0 and " + MAX_CUSTOM_VERB_ID);
this.id = idForCustomVerb(id);
}
else
{
if (id > CUSTOM_VERB_START - MAX_CUSTOM_VERB_ID)
throw new AssertionError("Invalid verb id " + id + " - we only allow ids between 0 and " + (CUSTOM_VERB_START - MAX_CUSTOM_VERB_ID));
this.id = id;
}
this.priority = priority;
this.serializer = serializer;
this.handler = handler;
this.responseVerb = responseVerb;
this.expiration = expiration;
this.kind = kind;
}
public IVersionedAsymmetricSerializer serializer()
{
return (IVersionedAsymmetricSerializer) serializer.get();
}
public IVerbHandler handler()
{
return (IVerbHandler) handler.get();
}
public long expiresAtNanos(long nowNanos)
{
return nowNanos + expiresAfterNanos();
}
public long expiresAfterNanos()
{
return expiration.applyAsLong(NANOSECONDS);
}
// this is a little hacky, but reduces the number of parameters up top
public boolean isResponse()
{
return handler.get() == ResponseVerbHandler.instance;
}
@VisibleForTesting
Supplier> unsafeSetHandler(Supplier> handler) throws NoSuchFieldException, IllegalAccessException
{
Supplier> original = this.handler;
Field field = Verb.class.getDeclaredField("handler");
field.setAccessible(true);
Field modifiers = ReflectionUtils.getModifiersField();
modifiers.setAccessible(true);
modifiers.setInt(field, field.getModifiers() & ~Modifier.FINAL);
field.set(this, handler);
return original;
}
@VisibleForTesting
public Supplier> unsafeSetSerializer(Supplier> serializer) throws NoSuchFieldException, IllegalAccessException
{
Supplier> original = this.serializer;
Field field = Verb.class.getDeclaredField("serializer");
field.setAccessible(true);
Field modifiers = ReflectionUtils.getModifiersField();
modifiers.setAccessible(true);
modifiers.setInt(field, field.getModifiers() & ~Modifier.FINAL);
field.set(this, serializer);
return original;
}
@VisibleForTesting
ToLongFunction unsafeSetExpiration(ToLongFunction expiration) throws NoSuchFieldException, IllegalAccessException
{
ToLongFunction original = this.expiration;
Field field = Verb.class.getDeclaredField("expiration");
field.setAccessible(true);
Field modifiers = ReflectionUtils.getModifiersField();
modifiers.setAccessible(true);
modifiers.setInt(field, field.getModifiers() & ~Modifier.FINAL);
field.set(this, expiration);
return original;
}
// This is the largest number we can store in 2 bytes using VIntCoding (1 bit per byte is used to indicate if there is more data coming).
// When generating ids we count *down* from this number
private static final int CUSTOM_VERB_START = (1 << (7 * 2)) - 1;
// Sanity check for the custom verb ids - avoids someone mistakenly adding a custom verb id close to the normal verbs which
// could cause a conflict later when new normal verbs are added.
private static final int MAX_CUSTOM_VERB_ID = 1000;
private static final Verb[] idToVerbMap;
private static final Verb[] idToCustomVerbMap;
private static final int minCustomId;
static
{
Verb[] verbs = values();
int max = -1;
int minCustom = Integer.MAX_VALUE;
for (Verb v : verbs)
{
switch (v.kind)
{
case NORMAL:
max = Math.max(v.id, max);
break;
case CUSTOM:
minCustom = Math.min(v.id, minCustom);
break;
default:
throw new AssertionError("Unsupported Verb Kind: " + v.kind + " for verb " + v);
}
}
minCustomId = minCustom;
if (minCustom <= max)
throw new IllegalStateException("Overlapping verb ids are not allowed");
Verb[] idMap = new Verb[max + 1];
int customCount = minCustom < Integer.MAX_VALUE ? CUSTOM_VERB_START - minCustom : 0;
Verb[] customIdMap = new Verb[customCount + 1];
for (Verb v : verbs)
{
switch (v.kind)
{
case NORMAL:
if (idMap[v.id] != null)
throw new IllegalArgumentException("cannot have two verbs that map to the same id: " + v + " and " + idMap[v.id]);
idMap[v.id] = v;
break;
case CUSTOM:
int relativeId = idForCustomVerb(v.id);
if (customIdMap[relativeId] != null)
throw new IllegalArgumentException("cannot have two custom verbs that map to the same id: " + v + " and " + customIdMap[relativeId]);
customIdMap[relativeId] = v;
break;
default:
throw new AssertionError("Unsupported Verb Kind: " + v.kind + " for verb " + v);
}
}
idToVerbMap = idMap;
idToCustomVerbMap = customIdMap;
}
public static Verb fromId(int id)
{
Verb[] verbs = idToVerbMap;
if (id >= minCustomId)
{
id = idForCustomVerb(id);
verbs = idToCustomVerbMap;
}
Verb verb = id >= 0 && id < verbs.length ? verbs[id] : null;
if (verb == null)
throw new IllegalArgumentException("Unknown verb id " + id);
return verb;
}
/**
* calculate an id for a custom verb
*/
private static int idForCustomVerb(int id)
{
return CUSTOM_VERB_START - id;
}
}
@SuppressWarnings("unused")
class VerbTimeouts
{
static final ToLongFunction rpcTimeout = DatabaseDescriptor::getRpcTimeout;
static final ToLongFunction writeTimeout = DatabaseDescriptor::getWriteRpcTimeout;
static final ToLongFunction readTimeout = DatabaseDescriptor::getReadRpcTimeout;
static final ToLongFunction rangeTimeout = DatabaseDescriptor::getRangeRpcTimeout;
static final ToLongFunction counterTimeout = DatabaseDescriptor::getCounterWriteRpcTimeout;
static final ToLongFunction truncateTimeout = DatabaseDescriptor::getTruncateRpcTimeout;
static final ToLongFunction repairTimeout = DatabaseDescriptor::getRepairRpcTimeout;
static final ToLongFunction pingTimeout = DatabaseDescriptor::getPingTimeout;
static final ToLongFunction longTimeout = units -> Math.max(DatabaseDescriptor.getRpcTimeout(units), units.convert(5L, TimeUnit.MINUTES));
static final ToLongFunction noTimeout = units -> { throw new IllegalStateException(); };
}
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