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/**
* Copyright (c) 2005-2012 EBM WebSourcing, 2012-2017 Linagora
*
* This program/library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2.1 of the License, or (at your
* option) any later version.
*
* This program/library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program/library; If not, see http://www.gnu.org/licenses/
* for the GNU Lesser General Public License version 2.1.
*/
package org.ow2.petals.bc.jms.connection;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.JMSSecurityException;
import javax.jms.Session;
import javax.naming.Context;
import javax.naming.NamingException;
import org.ow2.petals.component.framework.api.exception.PEtALSCDKException;
import com.ebmwebsourcing.easycommons.lang.StringHelper;
/**
* This class is used to create a JMS consumer or producer.
* @author Olivier Fabre - EBM WebSourcing
* @author Adrien Louis - EBM WebSourcing
*/
public abstract class AbstractJMSConnection {
private Context context;
private String connectionFactoryName;
private String destinationName;
private String user;
private String password;
private Connection connection;
protected Session session;
protected Destination destination;
private boolean transacted;
/**
* Constructor. All required information to create the producer or consumer
* are set here.
*
* @param jndiContext
* the context where the connectionFactory and the destination
* can be retrieved.
* @param connectionFactoryName
* name of the jms connectionfactory
* @param destinationName
* name of the destination (queue or topic)
* @param transacted
* created a transacted session or not
* @param user
* user to use to connect to the connection factory if required
* @param password
* password to use to connect to the connection factory if
* required
*/
public AbstractJMSConnection(Context jndiContext, String connectionFactoryName,
String destinationName, boolean transacted, String user, String password) {
this.context = jndiContext;
this.connectionFactoryName = connectionFactoryName;
this.destinationName = destinationName;
this.user = user;
this.password = password;
this.transacted = transacted;
}
/**
* Retrieve the connection factory and the destination from the JNDI
* context. Create a connection, using user/pwd if required, but do not
* start it. Create the jms session using connection. Create a
* consumer/producer, using the specified transacted mode.
*
* @throws TechnicalException
*/
protected void init() throws PEtALSCDKException {
ConnectionFactory connFact = AbstractJMSConnection.lookupConnectionFactory(this.context,
this.connectionFactoryName);
this.destination = AbstractJMSConnection.lookupDestination(this.context,
this.destinationName);
this.connection = AbstractJMSConnection
.createConnection(connFact, this.user, this.password);
try {
this.session = this.connection.createSession(this.transacted, Session.AUTO_ACKNOWLEDGE);
} catch (JMSException e) {
throw new PEtALSCDKException("Can not JMS session", e);
}
createJMSConsumerOrProducer();
}
/**
* Start the jms connection.
*
* @throws TechnicalException
* jmsException on starting connection
*/
public void start() throws PEtALSCDKException {
try {
this.connection.start();
} catch (JMSException e) {
throw new PEtALSCDKException("Can not start the JMS connection.", e);
}
}
public abstract void createJMSConsumerOrProducer() throws PEtALSCDKException;
/**
* Close messageConsumer/messageProducer, session and connection.
*
* @throws TechnicalException
* JmsException on connection stopping
*/
public void stop() throws PEtALSCDKException {
try {
connection.stop();
} catch (JMSException e) {
throw new PEtALSCDKException("Can not stop the JMS connection.", e);
}
}
/**
* Close messageConsumer/messageProducer, session and connection.
*
* @throws TechnicalException
* JmsException on connection closing
*/
public void close() throws PEtALSCDKException {
try {
connection.close();
} catch (JMSException e) {
throw new PEtALSCDKException("Can not close the JMS connection.", e);
}
}
public Session getSession() {
return this.session;
}
public String getDestinationName() {
return this.destinationName;
}
public boolean isTransacted() {
return this.transacted;
}
/**
* Retrieve the connectionFactory in the JNDI context
*
* @param ctx
* must be connected, must be non null
* @param connectionFactoryName
* must be non null
* @return the connectionFactory
* @throws TechnicalException
* the factory is not found
*/
private static ConnectionFactory lookupConnectionFactory(Context ctx,
String connectionFactoryName) throws PEtALSCDKException {
ConnectionFactory connFact = null;
try {
connFact = (ConnectionFactory) ctx.lookup(connectionFactoryName);
} catch (NamingException e) {
throw new PEtALSCDKException("ConnectionFactory '" + connectionFactoryName
+ "' not found in the JNDI context.", e);
}
return connFact;
}
/**
* Retrieve the destination in the JNDI context
*
* @param ctx
* must be connected, must be non null
* @param destination
* must be non null
* @return the destination
* @throws TechnicalException
* the destination is not found
*/
private static Destination lookupDestination(Context ctx, String destinationName)
throws PEtALSCDKException {
Destination dest = null;
try {
dest = (Destination) ctx.lookup(destinationName);
} catch (NamingException e) {
throw new PEtALSCDKException("Destination '" + destinationName
+ "' not found in the JNDI context.", e);
}
return dest;
}
/**
* Create a JMS Connection.
* If user is null, call a connectionFactory.createConnection()
* .
* If user is not null, call a
* connectionFactory.createConnection(user,password).
*
* @param connectionFactory
* must be non null
* @param user
* can be null
* @param password
* can be null
* @return a JMS connection
* @throws TechnicalException
* JMS security exception or connectionfactory exception
*/
private static Connection createConnection(ConnectionFactory connectionFactory, String user,
String password) throws PEtALSCDKException {
Connection conn = null;
try {
if (StringHelper.isNullOrEmpty(user)) {
conn = connectionFactory.createConnection();
} else {
conn = connectionFactory.createConnection(user, password);
}
} catch (JMSSecurityException e) {
throw new PEtALSCDKException(
"Invalid user/password to connect to the JMS connectionFactory.", e);
} catch (JMSException e) {
throw new PEtALSCDKException("JMS connectionFactory error.", e);
}
return conn;
}
}
