org.springframework.jca.context

Class SpringContextResourceAdapter

java.lang.Object

org.springframework.jca.context.SpringContextResourceAdapter

public class SpringContextResourceAdapter
extends java.lang.Object

JCA 1.5 javax.resource.spi.ResourceAdapter implementation that loads a Spring ApplicationContext, starting and stopping Spring-managed beans as part of the ResourceAdapter's lifecycle.

Ideal for application contexts that do not need any HTTP entry points but rather just consist of message endpoints and scheduled jobs etc. Beans in such a context may use application server resources such as the JTA transaction manager and JNDI-bound JDBC DataSources and JMS ConnectionFactory instances, and may also register with the platform's JMX server - all through Spring's standard transaction management and JNDI and JMX support facilities.

If the need for scheduling asynchronous work arises, consider using Spring's WorkManagerTaskExecutor as a standard bean definition, to be injected into application beans through dependency injection. This WorkManagerTaskExecutor will automatically use the JCA WorkManager from the BootstrapContext that has been provided to this ResourceAdapter.

The JCA javax.resource.spi.BootstrapContext may also be accessed directly, through application components that implement the BootstrapContextAware interface. When deployed using this ResourceAdapter, the BootstrapContext is guaranteed to be passed on to such components.

This ResourceAdapter is to be defined in a "META-INF/ra.xml" file within a J2EE ".rar" deployment unit like as follows:

 <?xml version="1.0" encoding="UTF-8"?>
 <connector xmlns="http://java.sun.com/xml/ns/j2ee"
                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                 xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/connector_1_5.xsd"
                 version="1.5">
         <vendor-name>Spring Framework</vendor-name>
         <eis-type>Spring Connector</eis-type>
         <resourceadapter-version>1.0</resourceadapter-version>
         <resourceadapter>
                 <resourceadapter-class>org.springframework.jca.context.SpringContextResourceAdapter</resourceadapter-class>
                 <config-property>
                         <config-property-name>ContextConfigLocation</config-property-name>
                         <config-property-type>java.lang.String</config-property-type>
                         <config-property-value>META-INF/applicationContext.xml</config-property-value>
                 </config-property>
         </resourceadapter>
 </connector>

Note that "META-INF/applicationContext.xml" is the default context config location, so it doesn't have to specified unless you intend to specify different/additional config files. So in the default case, you may remove the entire config-property section above.

For simple deployment needs, all you need to do is the following: Package all application classes into a RAR file (which is just a standard JAR file with a different file extension), add all required library jars into the root of the RAR archive, add a "META-INF/ra.xml" deployment descriptor as shown above as well as the corresponding Spring XML bean definition file(s) (typically "META-INF/applicationContext.xml"), and drop the resulting RAR file into your application server's deployment directory!

Since:

2.5

Author:

Juergen Hoeller

See Also:

setContextConfigLocation(java.lang.String), loadBeanDefinitions(org.springframework.beans.factory.support.BeanDefinitionRegistry, java.lang.String[]), ResourceAdapterApplicationContext

Field Summary

Fields

Modifier and Type	Field and Description
private ConfigurableApplicationContext	applicationContext
static java.lang.String	CONFIG_LOCATION_DELIMITERS Any number of these characters are considered delimiters between multiple context config paths in a single String value.
private java.lang.String	contextConfigLocation
static java.lang.String	DEFAULT_CONTEXT_CONFIG_LOCATION
protected Log	logger

Constructor Summary

Constructors

Constructor and Description
SpringContextResourceAdapter()

Method Summary

Modifier and Type	Method and Description
protected ConfigurableApplicationContext	createApplicationContext(BootstrapContext bootstrapContext) Build a Spring ApplicationContext for the given JCA BootstrapContext.
protected ConfigurableEnvironment	createEnvironment() Return a new StandardEnvironment.
void	endpointActivation(MessageEndpointFactory messageEndpointFactory, ActivationSpec activationSpec) This implementation always throws a NotSupportedException.
void	endpointDeactivation(MessageEndpointFactory messageEndpointFactory, ActivationSpec activationSpec) This implementation does nothing.
boolean	equals(java.lang.Object obj)
protected java.lang.String	getContextConfigLocation() Return the specified context configuration files.
javax.transaction.xa.XAResource[]	getXAResources(ActivationSpec[] activationSpecs) This implementation always returns null.
int	hashCode()
protected void	loadBeanDefinitions(BeanDefinitionRegistry registry, java.lang.String[] configLocations) Load the bean definitions into the given registry, based on the specified configuration files.
void	setContextConfigLocation(java.lang.String contextConfigLocation) Set the location of the context configuration files, within the resource adapter's deployment unit.
void	start(BootstrapContext bootstrapContext) This implementation loads a Spring ApplicationContext through the createApplicationContext(BootstrapContext) template method.
void	stop() This implementation closes the Spring ApplicationContext.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

CONFIG_LOCATION_DELIMITERS

public static final java.lang.String CONFIG_LOCATION_DELIMITERS

Any number of these characters are considered delimiters between multiple context config paths in a single String value.

See Also:

setContextConfigLocation(java.lang.String), Constant Field Values

DEFAULT_CONTEXT_CONFIG_LOCATION

public static final java.lang.String DEFAULT_CONTEXT_CONFIG_LOCATION

See Also:

Constant Field Values

logger

protected final Log logger

contextConfigLocation

private java.lang.String contextConfigLocation

applicationContext

private ConfigurableApplicationContext applicationContext

Constructor Detail

SpringContextResourceAdapter

public SpringContextResourceAdapter()

Method Detail

setContextConfigLocation

public void setContextConfigLocation(java.lang.String contextConfigLocation)

Set the location of the context configuration files, within the resource adapter's deployment unit. This can be a delimited String that consists of multiple resource location, separated by commas, semicolons, whitespace, or line breaks.

This can be specified as "ContextConfigLocation" config property in the ra.xml deployment descriptor.

The default is "classpath:META-INF/applicationContext.xml".

getContextConfigLocation

protected java.lang.String getContextConfigLocation()

Return the specified context configuration files.

createEnvironment

protected ConfigurableEnvironment createEnvironment()

Return a new StandardEnvironment.

Subclasses may override this method in order to supply a custom ConfigurableEnvironment implementation.

start

public void start(BootstrapContext bootstrapContext)
           throws ResourceAdapterInternalException

This implementation loads a Spring ApplicationContext through the createApplicationContext(BootstrapContext) template method.

Throws:

ResourceAdapterInternalException

createApplicationContext

protected ConfigurableApplicationContext createApplicationContext(BootstrapContext bootstrapContext)

Build a Spring ApplicationContext for the given JCA BootstrapContext.

The default implementation builds a ResourceAdapterApplicationContext and delegates to loadBeanDefinitions(org.springframework.beans.factory.support.BeanDefinitionRegistry, java.lang.String[]) for actually parsing the specified configuration files.

Parameters:

bootstrapContext - this ResourceAdapter's BootstrapContext

Returns:

the Spring ApplicationContext instance

loadBeanDefinitions

protected void loadBeanDefinitions(BeanDefinitionRegistry registry,
                                   java.lang.String[] configLocations)

Load the bean definitions into the given registry, based on the specified configuration files.

Parameters:

registry - the registry to load into

configLocations - the parsed config locations

See Also:

setContextConfigLocation(java.lang.String)

stop

public void stop()

This implementation closes the Spring ApplicationContext.

endpointActivation

public void endpointActivation(MessageEndpointFactory messageEndpointFactory,
                               ActivationSpec activationSpec)
                        throws ResourceException

This implementation always throws a NotSupportedException.

Throws:

ResourceException

endpointDeactivation

public void endpointDeactivation(MessageEndpointFactory messageEndpointFactory,
                                 ActivationSpec activationSpec)

This implementation does nothing.

getXAResources

public javax.transaction.xa.XAResource[] getXAResources(ActivationSpec[] activationSpecs)
                                                 throws ResourceException

This implementation always returns null.

Throws:

ResourceException

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object