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 */
017 package org.apache.camel.component.directvm;
018
019 import java.util.ArrayList;
020 import java.util.Collection;
021 import java.util.Map;
022 import java.util.concurrent.ConcurrentHashMap;
023 import java.util.concurrent.ConcurrentMap;
024 import java.util.concurrent.atomic.AtomicInteger;
025
026 import org.apache.camel.Endpoint;
027 import 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 */
033 public 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 }