| /** |
| * 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.camel.component.disruptor; |
| |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.util.ExchangeHelper; |
| |
| /** |
| * Implementation of the {@link SynchronizedExchange} interface that correctly handles all completion |
| * synchronisation courtesies for multiple consumers. |
| */ |
| public class MultipleConsumerSynchronizedExchange extends AbstractSynchronizedExchange { |
| |
| private final int expectedConsumers; |
| |
| private final AtomicInteger processedConsumers = new AtomicInteger(0); |
| |
| private final AtomicBoolean resultHandled = new AtomicBoolean(false); |
| |
| public MultipleConsumerSynchronizedExchange(Exchange exchange, int expectedConsumers) { |
| super(exchange); |
| this.expectedConsumers = expectedConsumers; |
| processedConsumers.set(0); |
| } |
| |
| |
| public void consumed(Exchange result) { |
| |
| if (processedConsumers.incrementAndGet() == expectedConsumers || result.getException() != null |
| && !resultHandled.getAndSet(true)) { |
| // all consumers are done processing or an exception occurred |
| |
| //SEDA Does not configure an aggregator in the internally used MulticastProcessor |
| //As a result, the behaviour of SEDA in case of multicast is to only copy the results on an error |
| if (result.getException() != null) { |
| ExchangeHelper.copyResults(getExchange(), result); |
| } |
| |
| performSynchronization(); |
| } |
| } |
| |
| @Override |
| public Exchange cancelAndGetOriginalExchange() { |
| resultHandled.set(true); |
| |
| return super.cancelAndGetOriginalExchange(); |
| } |
| } |