| /** |
| * 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.storm.trident.spout; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import org.apache.storm.Config; |
| import org.apache.storm.spout.ISpoutOutputCollector; |
| import org.apache.storm.spout.SpoutOutputCollector; |
| import org.apache.storm.task.TopologyContext; |
| import org.apache.storm.topology.IRichSpout; |
| import org.apache.storm.trident.operation.TridentCollector; |
| import org.apache.storm.trident.topology.TransactionAttempt; |
| import org.apache.storm.trident.util.TridentUtils; |
| import org.apache.storm.tuple.Fields; |
| import org.apache.storm.utils.RotatingMap; |
| |
| public class RichSpoutBatchExecutor implements ITridentSpout<Object> { |
| public static final String MAX_BATCH_SIZE_CONF = "topology.spout.max.batch.size"; |
| |
| IRichSpout spout; |
| |
| public RichSpoutBatchExecutor(IRichSpout spout) { |
| this.spout = spout; |
| } |
| |
| @Override |
| public Map<String, Object> getComponentConfiguration() { |
| return spout.getComponentConfiguration(); |
| } |
| |
| @Override |
| public Fields getOutputFields() { |
| return TridentUtils.getSingleOutputStreamFields(spout); |
| |
| } |
| |
| @Override |
| public BatchCoordinator<Object> getCoordinator(String txStateId, Map<String, Object> conf, TopologyContext context) { |
| return new RichSpoutCoordinator(); |
| } |
| |
| @Override |
| public Emitter<Object> getEmitter(String txStateId, Map<String, Object> conf, TopologyContext context) { |
| return new RichSpoutEmitter(conf, context); |
| } |
| |
| private static class RichSpoutCoordinator implements ITridentSpout.BatchCoordinator<Object> { |
| @Override |
| public Object initializeTransaction(long txid, Object prevMetadata, Object currMetadata) { |
| return null; |
| } |
| |
| @Override |
| public void success(long txid) { |
| } |
| |
| @Override |
| public boolean isReady(long txid) { |
| return true; |
| } |
| |
| @Override |
| public void close() { |
| } |
| } |
| |
| static class CaptureCollector implements ISpoutOutputCollector { |
| |
| public List<Object> ids; |
| public int numEmitted; |
| public long pendingCount; |
| TridentCollector collector; |
| |
| public void reset(TridentCollector c) { |
| collector = c; |
| ids = new ArrayList<>(); |
| } |
| |
| @Override |
| public void reportError(Throwable t) { |
| collector.reportError(t); |
| } |
| |
| @Override |
| public List<Integer> emit(String stream, List<Object> values, Object id) { |
| if (id != null) { |
| ids.add(id); |
| } |
| numEmitted++; |
| collector.emit(values); |
| return null; |
| } |
| |
| @Override |
| public void emitDirect(int task, String stream, List<Object> values, Object id) { |
| throw new UnsupportedOperationException("Trident does not support direct streams"); |
| } |
| |
| @Override |
| public void flush() { |
| collector.flush(); |
| } |
| |
| @Override |
| public long getPendingCount() { |
| return pendingCount; |
| } |
| } |
| |
| class RichSpoutEmitter implements ITridentSpout.Emitter<Object> { |
| int maxBatchSize; |
| boolean prepared = false; |
| CaptureCollector collector; |
| RotatingMap<Long, List<Object>> idsMap; |
| Map conf; |
| TopologyContext context; |
| long lastRotate = System.currentTimeMillis(); |
| long rotateTime; |
| |
| RichSpoutEmitter(Map<String, Object> conf, TopologyContext context) { |
| this.conf = conf; |
| this.context = context; |
| Number batchSize = (Number) conf.get(MAX_BATCH_SIZE_CONF); |
| if (batchSize == null) { |
| batchSize = 1000; |
| } |
| maxBatchSize = batchSize.intValue(); |
| collector = new CaptureCollector(); |
| idsMap = new RotatingMap<>(3); |
| rotateTime = 1000L * ((Number) conf.get(Config.TOPOLOGY_MESSAGE_TIMEOUT_SECS)).intValue(); |
| } |
| |
| @Override |
| public void emitBatch(TransactionAttempt tx, Object coordinatorMeta, TridentCollector collector) { |
| long txid = tx.getTransactionId(); |
| |
| long now = System.currentTimeMillis(); |
| if (now - lastRotate > rotateTime) { |
| Map<Long, List<Object>> failed = idsMap.rotate(); |
| for (Long id : failed.keySet()) { |
| //TODO: this isn't right... it's not in the map anymore |
| fail(id); |
| } |
| lastRotate = now; |
| } |
| |
| if (idsMap.containsKey(txid)) { |
| fail(txid); |
| } |
| |
| this.collector.reset(collector); |
| if (!prepared) { |
| spout.open(conf, context, new SpoutOutputCollector(this.collector)); |
| prepared = true; |
| } |
| for (int i = 0; i < maxBatchSize; i++) { |
| spout.nextTuple(); |
| if (this.collector.numEmitted < i) { |
| break; |
| } |
| } |
| idsMap.put(txid, this.collector.ids); |
| this.collector.pendingCount = idsMap.size(); |
| |
| } |
| |
| @Override |
| public void success(TransactionAttempt tx) { |
| ack(tx.getTransactionId()); |
| } |
| |
| private void ack(long batchId) { |
| List<Object> ids = (List<Object>) idsMap.remove(batchId); |
| if (ids != null) { |
| for (Object id : ids) { |
| spout.ack(id); |
| } |
| } |
| } |
| |
| private void fail(long batchId) { |
| List<Object> ids = (List<Object>) idsMap.remove(batchId); |
| if (ids != null) { |
| for (Object id : ids) { |
| spout.fail(id); |
| } |
| } |
| } |
| |
| @Override |
| public void close() { |
| spout.close(); |
| } |
| |
| } |
| |
| } |