Source Code Cross Referenced for SingleConnectionFactory102.java in  » J2EE » spring-framework-2.5 » org » springframework » jms » connection » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » spring framework 2.5 » org.springframework.jms.connection 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2002-2007 the original author or authors.
003:         *
004:         * Licensed under the Apache License, Version 2.0 (the "License");
005:         * you may not use this file except in compliance with the License.
006:         * You may obtain a copy of the License at
007:         *
008:         *      http://www.apache.org/licenses/LICENSE-2.0
009:         *
010:         * Unless required by applicable law or agreed to in writing, software
011:         * distributed under the License is distributed on an "AS IS" BASIS,
012:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         * See the License for the specific language governing permissions and
014:         * limitations under the License.
015:         */
016:
017:        package org.springframework.jms.connection;
018:
019:        import javax.jms.Connection;
020:        import javax.jms.ConnectionFactory;
021:        import javax.jms.JMSException;
022:        import javax.jms.QueueConnectionFactory;
023:        import javax.jms.TopicConnectionFactory;
024:
025:        /**
026:         * A subclass of {@link SingleConnectionFactory} for the JMS 1.0.2 specification,
027:         * not relying on JMS 1.1 methods like SingleConnectionFactory itself.
028:         * This class can be used for JMS 1.0.2 providers, offering the same API as
029:         * SingleConnectionFactory does for JMS 1.1 providers.
030:         *
031:         * <p>You need to set the {@link #setPubSubDomain "pubSubDomain" property},
032:         * since this class will always explicitly differentiate between a
033:         * {@link javax.jms.QueueConnection} and a {@link javax.jms.TopicConnection}.
034:         *
035:         * @author Juergen Hoeller
036:         * @since 1.1
037:         * @see #setTargetConnectionFactory
038:         * @see #setPubSubDomain
039:         */
040:        public class SingleConnectionFactory102 extends SingleConnectionFactory {
041:
042:            private boolean pubSubDomain = false;
043:
044:            /**
045:             * Create a new SingleConnectionFactory102 for bean-style usage.
046:             */
047:            public SingleConnectionFactory102() {
048:                super ();
049:            }
050:
051:            /**
052:             * Create a new SingleConnectionFactory102 that always returns a single
053:             * Connection that it will lazily create via the given target
054:             * ConnectionFactory.
055:             * @param connectionFactory the target ConnectionFactory
056:             * @param pubSubDomain whether the Publish/Subscribe domain (Topics) or
057:             * Point-to-Point domain (Queues) should be used
058:             */
059:            public SingleConnectionFactory102(
060:                    ConnectionFactory connectionFactory, boolean pubSubDomain) {
061:                setTargetConnectionFactory(connectionFactory);
062:                this .pubSubDomain = pubSubDomain;
063:                afterPropertiesSet();
064:            }
065:
066:            /**
067:             * Configure the factory with knowledge of the JMS domain used.
068:             * This tells the JMS 1.0.2 provider which class hierarchy to use for creating
069:             * Connections and Sessions.
070:             * <p>Default is Point-to-Point (Queues).
071:             * @param pubSubDomain <code>true</code> for Publish/Subscribe domain (Topics),
072:             * <code>false</code> for Point-to-Point domain (Queues)
073:             */
074:            public void setPubSubDomain(boolean pubSubDomain) {
075:                this .pubSubDomain = pubSubDomain;
076:            }
077:
078:            /**
079:             * Return whether the Publish/Subscribe domain (Topics) is used.
080:             * Otherwise, the Point-to-Point domain (Queues) is used.
081:             */
082:            public boolean isPubSubDomain() {
083:                return this .pubSubDomain;
084:            }
085:
086:            /**
087:             * In addition to checking whether the target ConnectionFactory is set,
088:             * make sure that the supplied factory is of the appropriate type for
089:             * the specified destination type: QueueConnectionFactory for queues,
090:             * TopicConnectionFactory for topics.
091:             */
092:            public void afterPropertiesSet() {
093:                super .afterPropertiesSet();
094:
095:                // Make sure that the ConnectionFactory passed is consistent.
096:                // Some provider implementations of the ConnectionFactory interface
097:                // implement both domain interfaces under the cover, so just check if
098:                // the selected domain is consistent with the type of connection factory.
099:                if (isPubSubDomain()) {
100:                    if (!(getTargetConnectionFactory() instanceof  TopicConnectionFactory)) {
101:                        throw new IllegalArgumentException(
102:                                "Specified a Spring JMS 1.0.2 SingleConnectionFactory for topics "
103:                                        + "but did not supply an instance of TopicConnectionFactory");
104:                    }
105:                } else {
106:                    if (!(getTargetConnectionFactory() instanceof  QueueConnectionFactory)) {
107:                        throw new IllegalArgumentException(
108:                                "Specified a Spring JMS 1.0.2 SingleConnectionFactory for queues "
109:                                        + "but did not supply an instance of QueueConnectionFactory");
110:                    }
111:                }
112:            }
113:
114:            /**
115:             * This implementation overrides the superclass method to use JMS 1.0.2 API.
116:             */
117:            protected Connection doCreateConnection() throws JMSException {
118:                if (isPubSubDomain()) {
119:                    return ((TopicConnectionFactory) getTargetConnectionFactory())
120:                            .createTopicConnection();
121:                } else {
122:                    return ((QueueConnectionFactory) getTargetConnectionFactory())
123:                            .createQueueConnection();
124:                }
125:            }
126:
127:        }
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