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From "flavio.donze" <flavio.do...@gmail.com>
Subject Jackrabbit JCA transaction handling
Date Wed, 21 Dec 2011 09:03:51 GMT
Hello

I’m using Jackrabbit handling transactions through JCA.

I’m not clear on how I should use the Jackrabbit API that it works correctly
with the rest of my framework, without any leaks and unnecessary work.

This is my spring application context where I declare the Jackrabbit beans,
plus “com.softmodeler.repository.service.impl.RepositoryService” which is my
own service.

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
       					   http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">


	<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="properties">
			<props>
				<prop key="jcr.homeDir" />
				<prop key="jcr.rmiPort" />
				<prop key="jcr.type" />
			</props>
		</property>
		<property name="systemPropertiesModeName">
			<value>SYSTEM_PROPERTIES_MODE_OVERRIDE</value>
		</property>
	</bean>

	<bean id="jcrConnectionManager"
class="org.jencks.factory.ConnectionManagerFactoryBean">
		<property name="transactionManager" ref="transactionManager"/>
		<property name="transaction" value="xa"/>
	</bean>

	<bean id="repositoryFactory"
class="org.apache.jackrabbit.core.RepositoryFactoryImpl"/>

	<bean id="repositoryManagedConnectionFactory"
class="org.apache.jackrabbit.jca.JCAManagedConnectionFactory"
destroy-method="finalize">
		<property name="configFile" value="classpath:${jcr.type}_repository.xml"/>
		<property name="homeDir" value="${jcr.homeDir}"/>
	</bean>

	<bean id="repository"
class="org.jencks.factory.ConnectionFactoryFactoryBean">
		<property name="managedConnectionFactory"
ref="repositoryManagedConnectionFactory"/>
		<property name="connectionManager" ref="jcrConnectionManager"/>
	</bean>

	

	<bean id="repositoryService"
class="com.softmodeler.repository.service.impl.RepositoryService">
		<property name="repository" ref="repository"/>
	</bean>

	

	<bean id="rmiRegistry"
class="org.springframework.remoting.rmi.RmiRegistryFactoryBean">
		<property name="port" value="${jcr.rmiPort}"/>
	</bean>

	<bean id="rmiServer"
class="org.springframework.extensions.jcr.jackrabbit.RmiServerRepositoryFactoryBean">
		<property name="repository" ref="repository"/>
		<property name="remoteAdapterFactory">
			<bean class="org.apache.jackrabbit.rmi.server.ServerAdapterFactory"/>
		</property>
		<property name="registry" ref="rmiRegistry"/>
		<property name="rmiName" value="jackrabbit"/>
	</bean>
</beans>


In the RepositoryService I then do the following:

/**
 * returns the session handle
 * 
 * @return
 */
protected Session getSession() {
	try {
		// login if session handle has not been created
		Session session = repository.login(CREDENTIALS, WORKSPACE);
		return session;
	} catch (Exception e) {
		logger.error("error receiving jcr session", e); //$NON-NLS-1$
		throw new IllegalStateException(e);
	}
}

@Transactional(propagation = Propagation.REQUIRED, rollbackFor =
Exception.class)
public void storeStream(String path, InputStream stream, STORE_TYPE type)
throws ServerException {
	Assert.isNotNull(path);
	Assert.isNotNull(stream);
	Assert.isNotNull(type);

	Session session = getSession();
	try {
		logger.debug("storing stream into {}", path); //$NON-NLS-1$

		Node root = session.getRootNode();
		Node typeNode = getOrCreateDirectoryNode(root, type.toString());
		Node containerNode = createStructure(typeNode, path, true);
		String name = path.substring(path.lastIndexOf(SEP) + 1, path.length());
		createOrUpdateFileNode(containerNode, stream, name);

		session.save();
	} catch (Exception e) {
		ServerUtil.throwServerException(e);
	} finally {
		session.logout();
	}
}

Is this the right way to get a session? Is the session.logout() correct, is
it required or will it be done by the transaction handling. 
Is there some documentation about this?

Greets
Flavio



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