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.direct;
018
019import java.util.HashMap;
020import java.util.Map;
021
022import org.apache.camel.Endpoint;
023import org.apache.camel.impl.UriEndpointComponent;
024import org.apache.camel.spi.Metadata;
025import org.apache.camel.util.ServiceHelper;
026
027/**
028 * The <a href="http://camel.apache.org/direct.html">Direct Component</a> manages {@link DirectEndpoint} and holds the list of named direct endpoints.
029 *
030 * @version
031 */
032public class DirectComponent extends UriEndpointComponent {
033
034    // must keep a map of consumers on the component to ensure endpoints can lookup old consumers
035    // later in case the DirectEndpoint was re-created due the old was evicted from the endpoints LRUCache
036    // on DefaultCamelContext
037    private final Map<String, DirectConsumer> consumers = new HashMap<String, DirectConsumer>();
038    private boolean block;
039    @Metadata(defaultValue = "30000")
040    private long timeout = 30000L;
041
042    public DirectComponent() {
043        super(DirectEndpoint.class);
044    }
045
046    protected Endpoint createEndpoint(String uri, String remaining, Map<String, Object> parameters) throws Exception {
047        DirectEndpoint endpoint = new DirectEndpoint(uri, this, consumers);
048        endpoint.setBlock(block);
049        endpoint.setTimeout(timeout);
050        setProperties(endpoint, parameters);
051        return endpoint;
052    }
053
054    @Override
055    protected void doStop() throws Exception {
056        ServiceHelper.stopServices(consumers);
057        consumers.clear();
058        super.doStop();
059    }
060
061    public boolean isBlock() {
062        return block;
063    }
064
065    /**
066     * If sending a message to a direct endpoint which has no active consumer,
067     * then we can tell the producer to block and wait for the consumer to become active.
068     */
069    public void setBlock(boolean block) {
070        this.block = block;
071    }
072
073    public long getTimeout() {
074        return timeout;
075    }
076
077    /**
078     * The timeout value to use if block is enabled.
079     */
080    public void setTimeout(long timeout) {
081        this.timeout = timeout;
082    }
083}