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eFaps is a framework used to map objects with or without attached files to
a relational database and optional file systems (only for attaches files). Configurable access control can be provided down to object and attribute level depending on implementation and use case. Depending on requirements, events (like triggers) allow to implement business logic and to separate business logic from user interface.
The framework includes integrations (e.g. webdav, full text search) and a web application as 'simple' configurable user interface. Some best practises, example web application modules (e.g. team work module) support administrators and implementers using this framework.
/*
* Copyright 2003 - 2012 The eFaps Team
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Revision: $Rev: 7740 $
* Last Changed: $Date: 2012-07-03 18:40:05 -0500 (Tue, 03 Jul 2012) $
* Last Changed By: $Author: [email protected] $
*/
package org.efaps.jms;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.QueueConnection;
import javax.jms.QueueConnectionFactory;
import javax.jms.Session;
import javax.jms.Topic;
import javax.jms.TopicConnection;
import javax.jms.TopicConnectionFactory;
import javax.jms.TopicSession;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.efaps.admin.common.SystemConfiguration;
import org.efaps.admin.datamodel.Type;
import org.efaps.admin.program.esjp.EFapsClassLoader;
import org.efaps.ci.CIAdminCommon;
import org.efaps.db.MultiPrintQuery;
import org.efaps.db.QueryBuilder;
import org.efaps.db.SelectBuilder;
import org.efaps.util.EFapsException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* TODO comment!
*
* @author The eFaps Team
* @version $Id: JmsHandler.java 7740 2012-07-03 23:40:05Z [email protected] $
*/
public final class JmsHandler
{
/**
* Logger for this class.
*/
private static final Logger LOG = LoggerFactory.getLogger(JmsHandler.class);
/**
* Mapping of JNDI-Name of the ConnectionFactory to QueueConnection.
*/
private static final Map QUEUE2QUECONN = new HashMap();
/**
* Mapping of JNDI-Name of the ConnectionFactory to TopicConnection.
*/
private static final Map TOPIC2QUECONN = new HashMap();
/**
* Mapping of a name to a JmsDefinition.
*/
private static final Map NAME2DEF = new HashMap();
/**
* Create Singelton.
*/
private JmsHandler()
{
}
/**
* Initialize the Jms.
* @throws EFapsException on error
*/
public static void initialize()
throws EFapsException
{
try {
//Kernel-Configuration
final SystemConfiguration config = SystemConfiguration.get(
UUID.fromString("acf2b19b-f7c4-4e4a-a724-fb2d9ed30079"));
if (config != null) {
final int timeout = config.getAttributeValueAsInteger(JmsSession.SESSIONTIMEOUTKEY);
if (timeout > 0) {
JmsSession.setSessionTimeout(timeout);
}
}
// this check is necessary for first install and update
if (CIAdminCommon.JmsAbstract.getType() != null) {
// remove any existing
JmsHandler.stop();
final Context ctx = new InitialContext();
final QueryBuilder queryBldr = new QueryBuilder(CIAdminCommon.JmsAbstract);
final MultiPrintQuery multi = queryBldr.getPrint();
multi.addAttribute(CIAdminCommon.JmsAbstract.Type,
CIAdminCommon.JmsAbstract.Name,
CIAdminCommon.JmsAbstract.ConnectionFactoryJNDI,
CIAdminCommon.JmsAbstract.DestinationJNDI);
final SelectBuilder sel = new SelectBuilder().linkto(CIAdminCommon.JmsAbstract.ESJPLink)
.file().label();
multi.addSelect(sel);
if (multi.executeWithoutAccessCheck()) {
JmsResourceConfig.getResourceConfig().init();
}
while (multi.next()) {
final Type type = multi.getAttribute(CIAdminCommon.JmsAbstract.Type);
final String connectionFactoryJNDI = multi
.getAttribute(CIAdminCommon.JmsAbstract.ConnectionFactoryJNDI);
final String destinationJNDI = multi
.getAttribute(CIAdminCommon.JmsAbstract.DestinationJNDI);
final String name = multi.getAttribute(CIAdminCommon.JmsAbstract.Name);
final String esjp = multi.getSelect(sel);
Session session;
if (type.isKindOf(CIAdminCommon.JmsQueueAbstract.getType())) {
final QueueConnectionFactory queueConnectionFactory = (QueueConnectionFactory) ctx
.lookup(connectionFactoryJNDI);
final QueueConnection queueConnection;
if (JmsHandler.QUEUE2QUECONN.containsKey(connectionFactoryJNDI)) {
queueConnection = JmsHandler.QUEUE2QUECONN.get(connectionFactoryJNDI);
} else {
queueConnection = queueConnectionFactory.createQueueConnection();
}
JmsHandler.QUEUE2QUECONN.put(connectionFactoryJNDI, queueConnection);
session = queueConnection.createQueueSession(false,
Session.AUTO_ACKNOWLEDGE);
queueConnection.start();
} else {
final TopicConnectionFactory topicConnectionFactory = (TopicConnectionFactory) ctx
.lookup(connectionFactoryJNDI);
final TopicConnection topicConn;
if (JmsHandler.TOPIC2QUECONN.containsKey(connectionFactoryJNDI)) {
topicConn = JmsHandler.TOPIC2QUECONN.get(connectionFactoryJNDI);
} else {
topicConn = topicConnectionFactory.createTopicConnection();
}
JmsHandler.TOPIC2QUECONN.put(connectionFactoryJNDI, topicConn);
if (type.isKindOf(CIAdminCommon.JmsTopicDurableConsumer.getType())) {
topicConn.setClientID(org.efaps.db.Context.getThreadContext().getPath() + ":" + name);
}
session = topicConn.createTopicSession(true, Session.AUTO_ACKNOWLEDGE);
topicConn.start();
}
final Destination dest = (Destination) ctx.lookup(destinationJNDI);
if (type.isKindOf(CIAdminCommon.JmsQueueProducer.getType())
|| type.isKindOf(CIAdminCommon.JmsTopicProducer.getType())) {
final MessageProducer producer;
if (type.isKindOf(CIAdminCommon.JmsQueueProducer.getType())) {
producer = session.createProducer(dest);
} else {
producer = ((TopicSession) session).createPublisher((Topic) dest);
}
producer.setDeliveryMode(DeliveryMode.PERSISTENT);
JmsHandler.NAME2DEF.put(name, new JmsDefinition(name, producer, session));
} else {
final MessageConsumer consumer;
if (type.isKindOf(CIAdminCommon.JmsQueueConsumer.getType())) {
consumer = session.createConsumer(dest);
} else if (type.isKindOf(CIAdminCommon.JmsTopicDurableConsumer.getType())) {
consumer = session.createDurableSubscriber((Topic) dest, name);
} else {
consumer = ((TopicSession) session).createSubscriber((Topic) dest);
}
@SuppressWarnings("unchecked")
final Class clazz = (Class) Class.forName(
esjp.trim(), false, EFapsClassLoader.getInstance());
final MessageListener myListener = clazz.newInstance();
consumer.setMessageListener(myListener);
}
}
}
} catch (final NamingException e) {
// this means that a definition cannot be found.
JmsHandler.LOG.error("Naming exception in JMS:", e);
} catch (final JMSException e) {
throw new EFapsException("JMSException", e);
} catch (final ClassNotFoundException e) {
throw new EFapsException("ClassNotFoundException", e);
} catch (final InstantiationException e) {
throw new EFapsException("InstantiationException", e);
} catch (final IllegalAccessException e) {
throw new EFapsException("IllegalAccessException", e);
}
}
/**
* @param _name anme of the definition
* @return JmsDefinition for the given name
*/
public static JmsDefinition getJmsDefinition(final String _name)
{
return JmsHandler.NAME2DEF.get(_name);
}
/**
* @param _jmsDefinition JmsDefinition to add
*/
public static void addJmsDefintion(final JmsDefinition _jmsDefinition)
{
JmsHandler.NAME2DEF.put(_jmsDefinition.getName(), _jmsDefinition);
}
/**
* Stop the jms.
* @throws EFapsException
*/
public static void stop()
throws EFapsException
{
for (final QueueConnection queCon : JmsHandler.QUEUE2QUECONN.values()) {
try {
queCon.close();
} catch (final JMSException e) {
throw new EFapsException("JMSException", e);
}
}
for (final TopicConnection queCon : JmsHandler.TOPIC2QUECONN.values()) {
try {
queCon.close();
} catch (final JMSException e) {
throw new EFapsException("JMSException", e);
}
}
JmsHandler.TOPIC2QUECONN.clear();
JmsHandler.QUEUE2QUECONN.clear();
JmsHandler.NAME2DEF.clear();
}
/**
* A definition of Jms for eFaps.
*/
public static class JmsDefinition
{
/**
* Name of the Definition.
*/
private final String name;
/**
* the related MessageProducer.
*/
private final MessageProducer messageProducer;
/**
* The related Session.
*/
private final Session session;
/**
* @param _name name
* @param _producer MessageProducer
* @param _session Session
*/
public JmsDefinition(final String _name,
final MessageProducer _producer,
final Session _session)
{
this.name = _name;
this.messageProducer = _producer;
this.session = _session;
}
/**
* This is the getter method for instance variable {@link #session}.
*
* @return value of instance variable {@link #session}
* @see #parameters
*/
public Session getSession()
{
return this.session;
}
/**
* This is the getter method for instance variable {@link #messageProducer}.
*
* @return value of instance variable {@link #messageProducer}
* @see #parameters
*/
public MessageProducer getMessageProducer()
{
return this.messageProducer;
}
/**
* This is the getter method for instance variable {@link #name}.
*
* @return value of instance variable {@link #name}
* @see #parameters
*/
public String getName()
{
return this.name;
}
}
}