/*
* Copyright 2002-2008 the original author or authors.
*
* 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.
*/
package org.springframework.jms.listener.endpoint;
import javax.jms.Session;
import javax.resource.spi.ResourceAdapter;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.BeanWrapper;
/**
* Default implementation of the {@link JmsActivationSpecFactory} interface.
* Supports the standard JMS properties as defined by the JMS 1.5 specification,
* as well as Spring's extended "maxConcurrency" and "prefetchSize" settings
* through autodetection of well-known vendor-specific provider properties.
*
* <p>An ActivationSpec factory is effectively dependent on the concrete
* JMS provider, e.g. on ActiveMQ. This default implementation simply
* guesses the ActivationSpec class name from the provider's class name
* ("ActiveMQResourceAdapter" -> "ActiveMQActivationSpec" in the same package,
* or "ActivationSpecImpl" in the same package as the ResourceAdapter class),
* and populates the ActivationSpec properties as suggested by the
* JCA 1.5 specification (Appendix B). Specify the 'activationSpecClass'
* property explicitly if these default naming rules do not apply.
*
* <p>Note: ActiveMQ, JORAM and WebSphere are supported in terms of extended
* settings (through the detection of their bean property naming conventions).
* The default ActivationSpec class detection rules may apply to other
* JMS providers as well.
*
* <p>Thanks to Agim Emruli and Laurie Chan for pointing out WebSphere MQ
* settings and contributing corresponding tests!
*
* @author Juergen Hoeller
* @since 2.5
* @see #setActivationSpecClass
*/
public class DefaultJmsActivationSpecFactory extends StandardJmsActivationSpecFactory {
private static final String RESOURCE_ADAPTER_SUFFIX = "ResourceAdapter";
private static final String RESOURCE_ADAPTER_IMPL_SUFFIX = "ResourceAdapterImpl";
private static final String ACTIVATION_SPEC_SUFFIX = "ActivationSpec";
private static final String ACTIVATION_SPEC_IMPL_SUFFIX = "ActivationSpecImpl";
/** Logger available to subclasses */
protected final Log logger = LogFactory.getLog(getClass());
/**
* This implementation guesses the ActivationSpec class name from the
* provider's class name: e.g. "ActiveMQResourceAdapter" ->
* "ActiveMQActivationSpec" in the same package, or a class named
* "ActivationSpecImpl" in the same package as the ResourceAdapter class.
*/
protected Class determineActivationSpecClass(ResourceAdapter adapter) {
String adapterClassName = adapter.getClass().getName();
if (adapterClassName.endsWith(RESOURCE_ADAPTER_SUFFIX)) {
// e.g. ActiveMQ
String providerName =
adapterClassName.substring(0, adapterClassName.length() - RESOURCE_ADAPTER_SUFFIX.length());
String specClassName = providerName + ACTIVATION_SPEC_SUFFIX;
try {
return adapter.getClass().getClassLoader().loadClass(specClassName);
}
catch (ClassNotFoundException ex) {
logger.debug("No default <Provider>ActivationSpec class found: " + specClassName);
}
}
else if (adapterClassName.endsWith(RESOURCE_ADAPTER_IMPL_SUFFIX)){
//e.g. WebSphere
String providerName =
adapterClassName.substring(0, adapterClassName.length() - RESOURCE_ADAPTER_IMPL_SUFFIX.length());
String specClassName = providerName + ACTIVATION_SPEC_IMPL_SUFFIX;
try {
return adapter.getClass().getClassLoader().loadClass(specClassName);
}
catch (ClassNotFoundException ex) {
logger.debug("No default <Provider>ActivationSpecImpl class found: " + specClassName);
}
}
// e.g. JORAM
String providerPackage = adapterClassName.substring(0, adapterClassName.lastIndexOf('.') + 1);
String specClassName = providerPackage + ACTIVATION_SPEC_IMPL_SUFFIX;
try {
return adapter.getClass().getClassLoader().loadClass(specClassName);
}
catch (ClassNotFoundException ex) {
logger.debug("No default ActivationSpecImpl class found in provider package: " + specClassName);
}
// ActivationSpecImpl class in "inbound" subpackage (WebSphere MQ 6.0.2.1)
specClassName = providerPackage + "inbound." + ACTIVATION_SPEC_IMPL_SUFFIX;
try {
return adapter.getClass().getClassLoader().loadClass(specClassName);
}
catch (ClassNotFoundException ex) {
logger.debug("No default ActivationSpecImpl class found in inbound subpackage: " + specClassName);
}
throw new IllegalStateException("No ActivationSpec class defined - " +
"specify the 'activationSpecClass' property or override the 'determineActivationSpecClass' method");
}
/**
* This implementation supports Spring's extended "maxConcurrency"
* and "prefetchSize" settings through detecting corresponding
* ActivationSpec properties: "maxSessions"/"maxNumberOfWorks" and
* "maxMessagesPerSessions"/"maxMessages", respectively
* (following ActiveMQ's and JORAM's naming conventions).
*/
protected void populateActivationSpecProperties(BeanWrapper bw, JmsActivationSpecConfig config) {
super.populateActivationSpecProperties(bw, config);
if (config.getMaxConcurrency() > 0) {
if (bw.isWritableProperty("maxSessions")) {
// ActiveMQ
bw.setPropertyValue("maxSessions", Integer.toString(config.getMaxConcurrency()));
}
else if (bw.isWritableProperty("maxNumberOfWorks")) {
// JORAM
bw.setPropertyValue("maxNumberOfWorks", Integer.toString(config.getMaxConcurrency()));
}
else if (bw.isWritableProperty("maxConcurrency")){
// WebSphere
bw.setPropertyValue("maxConcurrency", Integer.toString(config.getMaxConcurrency()));
}
}
if (config.getPrefetchSize() > 0) {
if (bw.isWritableProperty("maxMessagesPerSessions")) {
// ActiveMQ
bw.setPropertyValue("maxMessagesPerSessions", Integer.toString(config.getPrefetchSize()));
}
else if (bw.isWritableProperty("maxMessages")) {
// JORAM
bw.setPropertyValue("maxMessages", Integer.toString(config.getPrefetchSize()));
}
else if(bw.isWritableProperty("maxBatchSize")){
// WebSphere
bw.setPropertyValue("maxBatchSize", Integer.toString(config.getPrefetchSize()));
}
}
}
/**
* This implementation maps <code>SESSION_TRANSACTED</code> onto an
* ActivationSpec property named "useRAManagedTransaction", if available
* (following ActiveMQ's naming conventions).
*/
protected void applyAcknowledgeMode(BeanWrapper bw, int ackMode) {
if (ackMode == Session.SESSION_TRANSACTED && bw.isWritableProperty("useRAManagedTransaction")) {
// ActiveMQ
bw.setPropertyValue("useRAManagedTransaction", "true");
}
else {
super.applyAcknowledgeMode(bw, ackMode);
}
}
}
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