/**
* 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.spout;
import backtype.storm.spout.SpoutOutputCollectorCb;
import backtype.storm.task.ICollectorCallback;
import backtype.storm.tuple.Values;
import com.alibaba.jstorm.transactional.BatchSnapshot;
import com.alibaba.jstorm.transactional.TransactionCommon;
import com.alibaba.jstorm.transactional.utils.CountValue;
import com.alibaba.jstorm.utils.JStormUtils;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class TransactionSpoutOutputCollector extends SpoutOutputCollectorCb {
public static Logger LOG = LoggerFactory.getLogger(TransactionSpoutOutputCollector.class);
SpoutOutputCollectorCb delegate;
private TransactionSpout spout;
private long currBatchId;
private Map<Integer, CountValue> msgCount;
private class CollectorCallback implements ICollectorCallback {
@Override
public void execute(String stream, List<Integer> outTasks, List values) {
for (Integer task : outTasks) {
CountValue count = msgCount.get(task);
count.count++;
}
}
}
public TransactionSpoutOutputCollector(SpoutOutputCollectorCb delegate, TransactionSpout spout) {
this.delegate = delegate;
this.spout = spout;
}
public void init(long batchId, Set<Integer> targetTasks) {
setCurrBatchId(batchId);
initMsgCount(targetTasks);
LOG.info("Init output: batchId={}", currBatchId);
}
public void initMsgCount(Set<Integer> targetTasks) {
this.msgCount = new HashMap<>();
for (Integer task : targetTasks) {
this.msgCount.put(task, new CountValue());
}
}
public void setCurrBatchId(long batchId) {
this.currBatchId = batchId;
delegate.setBatchId(batchId);
}
public long getCurrBatchId() {
return currBatchId;
}
public void waitActive() {
while (!spout.isActive()) {
JStormUtils.sleepMs(1);
}
}
@Override
public List<Integer> emit(String streamId, List<Object> tuple, Object messageId) {
return emit(streamId, tuple, null, new CollectorCallback());
}
@Override
public void emitDirect(int taskId, String streamId, List<Object> tuple, Object messageId) {
emitDirect(taskId, streamId, tuple, null, new CollectorCallback());
}
@Override
public List<Integer> emit(String streamId, List<Object> tuple, Object messageId, ICollectorCallback callback) {
delegate.emit(streamId, tuple, null, (callback != null) ? callback : new CollectorCallback());
return null;
}
@Override
public void emitDirect(int taskId, String streamId, List<Object> tuple, Object messageId, ICollectorCallback callback) {
delegate.emitDirect(taskId, streamId, tuple, null, (callback != null) ? callback : new CollectorCallback());
}
public List<Integer> emitByDelegate(String streamId, List<Object> tuple, Object messageId) {
return emitByDelegate(streamId, tuple, null, null);
}
public List<Integer> emitByDelegate(String streamId, List<Object> tuple, Object messageId, ICollectorCallback callback) {
return delegate.emit(streamId, tuple, null, callback);
}
public void emitDirectByDelegate(int taskId, String streamId, List<Object> tuple, Object messageId) {
emitDirectByDelegate(taskId, streamId, tuple, null, null);
}
public void emitDirectByDelegate(int taskId, String streamId, List<Object> tuple, Object messageId, ICollectorCallback callback) {
delegate.emitDirect(taskId, streamId, tuple, null, callback);
}
@Override
public void emitDirectCtrl(int taskId, String streamId, List<Object> tuple, Object messageId) {
delegate.emitDirectCtrl(taskId, streamId, tuple, null);
}
@Override
public List<Integer> emitCtrl(String streamId, List<Object> tuple, Object messageId) {
return delegate.emitCtrl(streamId, tuple, null);
}
@Override
public void reportError(Throwable error) {
delegate.reportError(error);
}
@Override
public void emitBarrier() {
spout.commit();
}
public int flushBarrier() {
delegate.flush();
int ret = 0;
// Emit and flush barrier message to all downstream tasks
for (Entry<Integer, CountValue> entry : msgCount.entrySet()) {
int taskId = entry.getKey();
int count = entry.getValue().getValueAndSet(0);
ret += count;
BatchSnapshot barrierSnapshot = new BatchSnapshot(currBatchId, count);
emitDirectByDelegate(taskId, TransactionCommon.BARRIER_STREAM_ID, new Values(barrierSnapshot), null, null);
}
delegate.flush();
return ret;
}
public void moveToNextBatch() {
currBatchId++;
delegate.setBatchId(currBatchId);
}
public void flushInitBarrier() {
// flush pending message in outputCollector
delegate.flush();
delegate.setBatchId(TransactionCommon.INIT_BATCH_ID);
BatchSnapshot barrierSnapshot = new BatchSnapshot(TransactionCommon.INIT_BATCH_ID, 0);
for (Entry<Integer, CountValue> entry : msgCount.entrySet()) {
entry.getValue().setValue(0);
emitDirectByDelegate(entry.getKey(), TransactionCommon.BARRIER_STREAM_ID, new Values(barrierSnapshot), null, null);
}
delegate.flush();
delegate.setBatchId(currBatchId);
}
}