/**
* 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 com.alibaba.jstorm.transactional;
import backtype.storm.generated.StreamInfo;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.tuple.Fields;
import backtype.storm.utils.Utils;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class TransactionOutputFieldsDeclarer implements OutputFieldsDeclarer {
private Map<String, StreamInfo> _fields = new HashMap<>();
public void declare(Fields fields) {
declare(false, fields);
}
public void declare(boolean direct, Fields fields) {
declareStream(Utils.DEFAULT_STREAM_ID, direct, fields);
}
public void declareStream(String streamId, Fields fields) {
declareStream(streamId, false, fields);
}
public void declareStream(String streamId, boolean direct, Fields fields) {
if (_fields.containsKey(streamId)) {
throw new IllegalArgumentException("Fields for " + streamId + " already set");
}
List<String> fieldList = new ArrayList<>();
fieldList.add(TransactionCommon.BATCH_GROUP_ID_FIELD);
fieldList.addAll(fields.toList());
_fields.put(streamId, new StreamInfo(fieldList, direct));
}
public Map<String, StreamInfo> getFieldsDeclaration() {
return _fields;
}
}