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.core.xml;
018    
019    import javax.xml.bind.annotation.XmlAccessType;
020    import javax.xml.bind.annotation.XmlAccessorType;
021    import javax.xml.bind.annotation.XmlAttribute;
022    import javax.xml.bind.annotation.XmlRootElement;
023    import javax.xml.bind.annotation.XmlTransient;
024    import javax.xml.bind.annotation.XmlType;
025    
026    import org.apache.camel.CamelContext;
027    import org.apache.camel.CamelContextAware;
028    import org.apache.camel.ConsumerTemplate;
029    import org.apache.camel.impl.DefaultConsumerTemplate;
030    import org.apache.camel.model.IdentifiedType;
031    import org.apache.camel.util.ServiceHelper;
032    
033    /**
034     * A factory for creating a new {@link org.apache.camel.ConsumerTemplate}
035     * instance with a minimum of XML
036     *
037     * @version $Revision: 934375 $
038     */
039    @XmlAccessorType(XmlAccessType.FIELD)
040    public abstract class AbstractCamelConsumerTemplateFactoryBean extends IdentifiedType implements CamelContextAware {
041        @XmlTransient
042        private ConsumerTemplate template;
043        @XmlAttribute
044        private String camelContextId;
045        @XmlTransient
046        private CamelContext camelContext;
047        @XmlAttribute
048        private Integer maximumCacheSize;
049    
050        public void afterPropertiesSet() throws Exception {
051            if (camelContext == null && camelContextId != null) {
052                camelContext = getCamelContextWithId(camelContextId);
053            }
054            if (camelContext == null) {
055                throw new IllegalArgumentException("A CamelContext or a CamelContextId must be injected!");
056            }
057        }
058    
059        protected abstract CamelContext getCamelContextWithId(String camelContextId);
060    
061        public Object getObject() throws Exception {
062            template = new DefaultConsumerTemplate(camelContext);
063    
064            // set custom cache size if provided
065            if (maximumCacheSize != null) {
066                template.setMaximumCacheSize(maximumCacheSize);
067            }
068    
069            // must start it so its ready to use
070            ServiceHelper.startService(template);
071            return template;
072        }
073    
074        public Class getObjectType() {
075            return DefaultConsumerTemplate.class;
076        }
077    
078        public boolean isSingleton() {
079            return true;
080        }
081    
082        public void destroy() throws Exception {
083            ServiceHelper.stopService(template);
084        }
085    
086        // Properties
087        // -------------------------------------------------------------------------
088    
089        public CamelContext getCamelContext() {
090            return camelContext;
091        }
092    
093        public void setCamelContext(CamelContext camelContext) {
094            this.camelContext = camelContext;
095        }
096    
097        public String getCamelContextId() {
098            return camelContextId;
099        }
100    
101        public void setCamelContextId(String camelContextId) {
102            this.camelContextId = camelContextId;
103        }
104    
105        public Integer getMaximumCacheSize() {
106            return maximumCacheSize;
107        }
108    
109        public void setMaximumCacheSize(Integer maximumCacheSize) {
110            this.maximumCacheSize = maximumCacheSize;
111        }
112    }