/*
* Copyright © 2014 Cask Data, Inc.
*
* Licensed 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 co.cask.cdap.data2.transaction.queue.hbase.coprocessor;
/**
* Helper class for holding consumer groupId and instanceId for hash map lookup.
*
* NOTE: This class is not thread safe.
*/
public final class ConsumerInstance {
private long groupId;
private int instanceId;
private boolean hashCodeComputed;
private int hashCode;
public ConsumerInstance(long groupId, int instanceId) {
setGroupInstance(groupId, instanceId);
}
public void setGroupInstance(long groupId, int instanceId) {
this.groupId = groupId;
this.instanceId = instanceId;
this.hashCodeComputed = false;
}
@Override
public boolean equals(Object o) {
if (o == this) {
return true;
}
if (o == null || o.getClass() != ConsumerInstance.class) {
return false;
}
ConsumerInstance other = (ConsumerInstance) o;
return groupId == other.groupId && instanceId == other.instanceId;
}
@Override
public int hashCode() {
if (hashCodeComputed) {
return hashCode;
}
hashCode = (int) ((groupId ^ (groupId >> 32)) ^ instanceId);
hashCodeComputed = true;
return hashCode;
}
}