/*
* 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 org.apache.hadoop.hive.llap.daemon.impl;
/**
* An identifier for a query, which is unique.
*
* This is based on the AppId and dagId.
*
* At the moment, It's possible for Hive to use the same "hive.query.id" if a single query
* is split into stages - which prevents this identifier being used as the unique id.
*
* Not exposing getters to allow this to evolve - i.e. retain the uniqueness constraint.
*
*/
public final class QueryIdentifier {
private final String appIdentifier;
private final int dagIdentifier;
public QueryIdentifier(String appIdentifier, int dagIdentifier) {
this.appIdentifier = appIdentifier;
this.dagIdentifier = dagIdentifier;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || !getClass().isAssignableFrom(o.getClass())) {
return false;
}
QueryIdentifier that = (QueryIdentifier) o;
if (dagIdentifier != that.dagIdentifier) {
return false;
}
return appIdentifier.equals(that.appIdentifier);
}
@Override
public int hashCode() {
int result = appIdentifier.hashCode();
result = 31 * result + dagIdentifier;
return result;
}
@Override
public String toString() {
return "QueryIdentifier{" +
"appIdentifier='" + appIdentifier + '\'' +
", dagIdentifier=" + dagIdentifier +
'}';
}
}