001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.camel.component.directvm; 018 019import java.util.ArrayList; 020import java.util.Collection; 021import java.util.Map; 022import java.util.concurrent.ConcurrentHashMap; 023import java.util.concurrent.ConcurrentMap; 024import java.util.concurrent.atomic.AtomicInteger; 025 026import org.apache.camel.Endpoint; 027import org.apache.camel.impl.UriEndpointComponent; 028 029/** 030 * Represents the component that manages {@link DirectVmEndpoint}. It holds the 031 * list of named direct-vm endpoints. 032 */ 033public class DirectVmComponent extends UriEndpointComponent { 034 035 private static final AtomicInteger START_COUNTER = new AtomicInteger(); 036 037 // must keep a map of consumers on the component to ensure endpoints can lookup old consumers 038 // later in case the DirectVmEndpoint was re-created due the old was evicted from the endpoints LRUCache 039 // on DefaultCamelContext 040 private static final ConcurrentMap<String, DirectVmConsumer> CONSUMERS = new ConcurrentHashMap<String, DirectVmConsumer>(); 041 private boolean block; 042 private long timeout = 30000L; 043 044 public DirectVmComponent() { 045 super(DirectVmEndpoint.class); 046 } 047 048 /** 049 * Gets all the consumer endpoints. 050 * 051 * @return consumer endpoints 052 */ 053 public static Collection<Endpoint> getConsumerEndpoints() { 054 Collection<Endpoint> endpoints = new ArrayList<Endpoint>(CONSUMERS.size()); 055 for (DirectVmConsumer consumer : CONSUMERS.values()) { 056 endpoints.add(consumer.getEndpoint()); 057 } 058 return endpoints; 059 } 060 061 @Override 062 protected Endpoint createEndpoint(String uri, String remaining, Map<String, Object> parameters) throws Exception { 063 DirectVmEndpoint answer = new DirectVmEndpoint(uri, this); 064 answer.setBlock(block); 065 answer.setTimeout(timeout); 066 answer.configureProperties(parameters); 067 return answer; 068 } 069 070 public DirectVmConsumer getConsumer(DirectVmEndpoint endpoint) { 071 String key = getConsumerKey(endpoint.getEndpointUri()); 072 return CONSUMERS.get(key); 073 } 074 075 public void addConsumer(DirectVmEndpoint endpoint, DirectVmConsumer consumer) { 076 String key = getConsumerKey(endpoint.getEndpointUri()); 077 DirectVmConsumer existing = CONSUMERS.putIfAbsent(key, consumer); 078 if (existing != null) { 079 String contextId = existing.getEndpoint().getCamelContext().getName(); 080 throw new IllegalStateException("A consumer " + existing + " already exists from CamelContext: " + contextId + ". Multiple consumers not supported"); 081 } 082 } 083 084 public void removeConsumer(DirectVmEndpoint endpoint, DirectVmConsumer consumer) { 085 String key = getConsumerKey(endpoint.getEndpointUri()); 086 CONSUMERS.remove(key); 087 } 088 089 private static String getConsumerKey(String uri) { 090 if (uri.contains("?")) { 091 // strip parameters 092 uri = uri.substring(0, uri.indexOf('?')); 093 } 094 return uri; 095 } 096 097 @Override 098 protected void doStart() throws Exception { 099 super.doStart(); 100 START_COUNTER.incrementAndGet(); 101 } 102 103 @Override 104 protected void doStop() throws Exception { 105 if (START_COUNTER.decrementAndGet() <= 0) { 106 // clear queues when no more direct-vm components in use 107 CONSUMERS.clear(); 108 } 109 super.doStop(); 110 } 111 112 public boolean isBlock() { 113 return block; 114 } 115 116 public void setBlock(boolean block) { 117 this.block = block; 118 } 119 120 public long getTimeout() { 121 return timeout; 122 } 123 124 public void setTimeout(long timeout) { 125 this.timeout = timeout; 126 } 127}