| /* |
| * 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.daemon.worker; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.Queue; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.locks.ReentrantReadWriteLock; |
| import org.apache.storm.Config; |
| import org.apache.storm.Constants; |
| import org.apache.storm.messaging.TaskMessage; |
| import org.apache.storm.policy.IWaitStrategy; |
| import org.apache.storm.serialization.ITupleSerializer; |
| import org.apache.storm.tuple.AddressedTuple; |
| import org.apache.storm.utils.JCQueue; |
| import org.apache.storm.utils.ObjectReader; |
| import org.apache.storm.utils.TransferDrainer; |
| import org.apache.storm.utils.Utils; |
| import org.apache.storm.utils.Utils.SmartThread; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| // Transfers messages destined to other workers |
| public class WorkerTransfer implements JCQueue.Consumer { |
| static final Logger LOG = LoggerFactory.getLogger(WorkerTransfer.class); |
| |
| private final TransferDrainer drainer; |
| private final WorkerState workerState; |
| |
| private final IWaitStrategy backPressureWaitStrategy; |
| |
| private JCQueue transferQueue; // [remoteTaskId] -> JCQueue. Some entries maybe null (if no emits to those tasksIds from this worker) |
| |
| private final AtomicBoolean[] remoteBackPressureStatus; // [[remoteTaskId] -> true/false : indicates if remote task is under BP. |
| |
| public WorkerTransfer(WorkerState workerState, Map<String, Object> topologyConf, int maxTaskIdInTopo) { |
| this.workerState = workerState; |
| this.backPressureWaitStrategy = IWaitStrategy.createBackPressureWaitStrategy(topologyConf); |
| this.drainer = new TransferDrainer(); |
| this.remoteBackPressureStatus = new AtomicBoolean[maxTaskIdInTopo + 1]; |
| for (int i = 0; i < remoteBackPressureStatus.length; i++) { |
| remoteBackPressureStatus[i] = new AtomicBoolean(false); |
| } |
| |
| Integer xferQueueSz = ObjectReader.getInt(topologyConf.get(Config.TOPOLOGY_TRANSFER_BUFFER_SIZE)); |
| Integer xferBatchSz = ObjectReader.getInt(topologyConf.get(Config.TOPOLOGY_TRANSFER_BATCH_SIZE)); |
| if (xferBatchSz > xferQueueSz / 2) { |
| throw new IllegalArgumentException(Config.TOPOLOGY_TRANSFER_BATCH_SIZE + ":" + xferBatchSz + " must be no more than half of " |
| + Config.TOPOLOGY_TRANSFER_BUFFER_SIZE + ":" + xferQueueSz); |
| } |
| |
| this.transferQueue = new JCQueue("worker-transfer-queue", xferQueueSz, 0, xferBatchSz, backPressureWaitStrategy, |
| workerState.getTopologyId(), Constants.SYSTEM_COMPONENT_ID, Collections.singletonList(-1), workerState.getPort(), |
| workerState.getMetricRegistry()); |
| } |
| |
| public JCQueue getTransferQueue() { |
| return transferQueue; |
| } |
| |
| AtomicBoolean[] getRemoteBackPressureStatus() { |
| return remoteBackPressureStatus; |
| } |
| |
| public SmartThread makeTransferThread() { |
| return Utils.asyncLoop(() -> { |
| if (transferQueue.consume(this) == 0) { |
| return 1L; |
| } |
| return 0L; |
| }); |
| } |
| |
| @Override |
| public void accept(Object tuple) { |
| TaskMessage tm = (TaskMessage) tuple; |
| drainer.add(tm); |
| } |
| |
| @Override |
| public void flush() throws InterruptedException { |
| ReentrantReadWriteLock.ReadLock readLock = workerState.endpointSocketLock.readLock(); |
| try { |
| readLock.lock(); |
| drainer.send(workerState.cachedTaskToNodePort.get(), workerState.cachedNodeToPortSocket.get()); |
| } finally { |
| readLock.unlock(); |
| } |
| drainer.clear(); |
| } |
| |
| /* Not a Blocking call. If cannot emit, will add 'tuple' to 'pendingEmits' and return 'false'. 'pendingEmits' can be null */ |
| public boolean tryTransferRemote(AddressedTuple addressedTuple, Queue<AddressedTuple> pendingEmits, ITupleSerializer serializer) { |
| if (pendingEmits != null && !pendingEmits.isEmpty()) { |
| pendingEmits.add(addressedTuple); |
| return false; |
| } |
| |
| if (!remoteBackPressureStatus[addressedTuple.dest].get()) { |
| TaskMessage tm = new TaskMessage(addressedTuple.getDest(), serializer.serialize(addressedTuple.getTuple())); |
| if (transferQueue.tryPublish(tm)) { |
| return true; |
| } |
| } else { |
| LOG.debug("Noticed Back Pressure in remote task {}", addressedTuple.dest); |
| } |
| if (pendingEmits != null) { |
| pendingEmits.add(addressedTuple); |
| } |
| return false; |
| } |
| |
| public void flushRemotes() throws InterruptedException { |
| transferQueue.flush(); |
| } |
| |
| public boolean tryFlushRemotes() { |
| return transferQueue.tryFlush(); |
| } |
| |
| |
| public void haltTransferThd() { |
| transferQueue.close(); |
| } |
| |
| } |