/**
* 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.hive.ql.exec;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* After this job closed, some data (feedbacks) can be passed to descendant jobs.
* Currently the feedbacks is a generic data structure that has a key (FeedBackType)
* and an object as value. The type of the object depends on the key.
**/
public class JobCloseFeedBack {
// list of feedback types
public static enum FeedBackType {
DYNAMIC_PARTITIONS, // list of dynamic partitions generated by this MR job
NONE
};
Map<FeedBackType, List<Object>> feedBacks; // one type corresponds to a list of values
public JobCloseFeedBack() {
feedBacks = new HashMap<FeedBackType, List<Object>>();
}
public void append(FeedBackType t, Object v) {
List<Object> vals = feedBacks.get(t);
if (vals == null) {
vals = new ArrayList<Object>();
}
vals.add(v);
feedBacks.put(t, vals);
}
public List<Object> get(FeedBackType t) {
return feedBacks.get(t);
}
}