/*
* 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.phoenix.hbase.index.master;
import java.io.IOException;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.coprocessor.BaseMasterObserver;
import org.apache.hadoop.hbase.coprocessor.MasterCoprocessorEnvironment;
import org.apache.hadoop.hbase.coprocessor.ObserverContext;
import org.apache.hadoop.hbase.master.LoadBalancer;
import org.apache.phoenix.hbase.index.balancer.IndexLoadBalancer;
/**
* Defines of coprocessor hooks(to support secondary indexing) of operations on
* {@link org.apache.hadoop.hbase.master.HMaster} process.
*/
public class IndexMasterObserver extends BaseMasterObserver {
IndexLoadBalancer balancer = null;
@Override
public void preMasterInitialization(ObserverContext<MasterCoprocessorEnvironment> ctx)
throws IOException {
LoadBalancer loadBalancer =
ctx.getEnvironment().getMasterServices().getAssignmentManager().getBalancer();
if (loadBalancer instanceof IndexLoadBalancer) {
balancer = (IndexLoadBalancer) loadBalancer;
}
super.preMasterInitialization(ctx);
}
@Override
public void preCreateTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
HTableDescriptor desc, HRegionInfo[] regions) throws IOException {
TableName userTableName = null;
if (balancer != null && desc.getValue(IndexLoadBalancer.PARENT_TABLE_KEY) != null) {
userTableName =
TableName.valueOf(desc.getValue(IndexLoadBalancer.PARENT_TABLE_KEY));
balancer.addTablesToColocate(userTableName, desc.getTableName());
}
if (userTableName != null) balancer.populateRegionLocations(userTableName);
super.preCreateTableHandler(ctx, desc, regions);
}
@Override
public void postDeleteTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
TableName tableName) throws IOException {
if (balancer != null && balancer.isTableColocated(tableName)) {
balancer.removeTablesFromColocation(tableName);
}
}
}