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Server functionality for HBase
/*
* 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.hadoop.hbase.replication.master;
import static org.apache.hadoop.hbase.HConstants.NO_NONCE;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
import org.apache.hadoop.hbase.master.MasterServices;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.yetus.audience.InterfaceAudience;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This will create {@link #REPLICATION_SINK_TRACKER_TABLE_NAME_STR} table if
* hbase.regionserver.replication.sink.tracker.enabled config key is enabled and table not created
**/
@InterfaceAudience.Private
public final class ReplicationSinkTrackerTableCreator {
private static final Logger LOG =
LoggerFactory.getLogger(ReplicationSinkTrackerTableCreator.class);
private static final long TTL = TimeUnit.DAYS.toSeconds(365); // 1 year in seconds
public static final byte[] RS_COLUMN = Bytes.toBytes("region_server_name");
public static final byte[] WAL_NAME_COLUMN = Bytes.toBytes("wal_name");
public static final byte[] TIMESTAMP_COLUMN = Bytes.toBytes("timestamp");
public static final byte[] OFFSET_COLUMN = Bytes.toBytes("offset");
/** Will create {@link #REPLICATION_SINK_TRACKER_TABLE_NAME_STR} table if this conf is enabled **/
public static final String REPLICATION_SINK_TRACKER_ENABLED_KEY =
"hbase.regionserver.replication.sink.tracker.enabled";
public static final boolean REPLICATION_SINK_TRACKER_ENABLED_DEFAULT = false;
/** The {@link #REPLICATION_SINK_TRACKER_TABLE_NAME_STR} info family as a string */
private static final String REPLICATION_SINK_TRACKER_INFO_FAMILY_STR = "info";
/** The {@link #REPLICATION_SINK_TRACKER_TABLE_NAME_STR} info family in array of bytes */
public static final byte[] REPLICATION_SINK_TRACKER_INFO_FAMILY =
Bytes.toBytes(REPLICATION_SINK_TRACKER_INFO_FAMILY_STR);
public static final String REPLICATION_SINK_TRACKER_TABLE_NAME_STR = "REPLICATION.SINK_TRACKER";
/* Private default constructor */
private ReplicationSinkTrackerTableCreator() {
}
/**
* {@link #REPLICATION_SINK_TRACKER_TABLE_NAME_STR} table name - can be enabled with config -
* hbase.regionserver.replication.sink.tracker.enabled
*/
public static final TableName REPLICATION_SINK_TRACKER_TABLE_NAME =
TableName.valueOf(REPLICATION_SINK_TRACKER_TABLE_NAME_STR);
private static final TableDescriptorBuilder TABLE_DESCRIPTOR_BUILDER = TableDescriptorBuilder
.newBuilder(REPLICATION_SINK_TRACKER_TABLE_NAME).setRegionReplication(1)
.setColumnFamily(ColumnFamilyDescriptorBuilder.newBuilder(REPLICATION_SINK_TRACKER_INFO_FAMILY)
.setScope(HConstants.REPLICATION_SCOPE_LOCAL).setBlockCacheEnabled(false).setMaxVersions(1)
.setTimeToLive((int) TTL).build());
/*
* We will create this table only if hbase.regionserver.replication.sink.tracker.enabled is
* enabled and table doesn't exists already.
*/
public static void createIfNeededAndNotExists(Configuration conf, MasterServices masterServices)
throws IOException {
boolean replicationSinkTrackerEnabled = conf.getBoolean(REPLICATION_SINK_TRACKER_ENABLED_KEY,
REPLICATION_SINK_TRACKER_ENABLED_DEFAULT);
if (!replicationSinkTrackerEnabled) {
LOG.info("replication sink tracker requests logging to table {} is disabled." + " Quitting.",
REPLICATION_SINK_TRACKER_TABLE_NAME_STR);
return;
}
if (!masterServices.getTableDescriptors().exists(REPLICATION_SINK_TRACKER_TABLE_NAME)) {
LOG.info("{} table not found. Creating.", REPLICATION_SINK_TRACKER_TABLE_NAME_STR);
masterServices.createTable(TABLE_DESCRIPTOR_BUILDER.build(), null, 0L, NO_NONCE);
}
}
}