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 */
032
033public class DirectComponent extends UriEndpointComponent {
034
035    // must keep a map of consumers on the component to ensure endpoints can lookup old consumers
036    // later in case the DirectEndpoint was re-created due the old was evicted from the endpoints LRUCache
037    // on DefaultCamelContext
038    private final Map<String, DirectConsumer> consumers = new HashMap<String, DirectConsumer>();
039    private boolean block;
040    @Metadata(defaultValue = "30000")
041    private long timeout = 30000L;
042
043    public DirectComponent() {
044        super(DirectEndpoint.class);
045    }
046
047    protected Endpoint createEndpoint(String uri, String remaining, Map<String, Object> parameters) throws Exception {
048        DirectEndpoint endpoint = new DirectEndpoint(uri, this, consumers);
049        endpoint.setBlock(block);
050        endpoint.setTimeout(timeout);
051        setProperties(endpoint, parameters);
052        return endpoint;
053    }
054
055    @Override
056    protected void doStop() throws Exception {
057        ServiceHelper.stopServices(consumers);
058        consumers.clear();
059        super.doStop();
060    }
061
062    public boolean isBlock() {
063        return block;
064    }
065
066    /**
067     * If sending a message to a direct endpoint which has no active consumer,
068     * then we can tell the producer to block and wait for the consumer to become active.
069     */
070    public void setBlock(boolean block) {
071        this.block = block;
072    }
073
074    public long getTimeout() {
075        return timeout;
076    }
077
078    /**
079     * The timeout value to use if block is enabled.
080     */
081    public void setTimeout(long timeout) {
082        this.timeout = timeout;
083    }
084}