org.camunda.bpm.application

Class AbstractProcessApplication

java.lang.Object

org.camunda.bpm.application.AbstractProcessApplication

All Implemented Interfaces:

ProcessApplicationInterface

Direct Known Subclasses:

EjbProcessApplication, EmbeddedProcessApplication, ServletProcessApplication, SpringProcessApplication

public abstract class AbstractProcessApplication
extends Object
implements ProcessApplicationInterface

Author:

Daniel Meyer

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	isDeployed
protected BeanELResolver	processApplicationBeanElResolver
protected ELResolver	processApplicationElResolver
protected ProcessApplicationScriptEnvironment	processApplicationScriptEnvironment
protected VariableSerializers	variableSerializers

Constructor Summary

Constructors

Constructor and Description
AbstractProcessApplication()

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract String	autodetectProcessApplicationName() Override this method to autodetect an application name in case the ProcessApplication annotation was used but without parameter.
void	createDeployment(String processArchiveName, DeploymentBuilder deploymentBuilder) Override this method in order to programmatically add resources to the deployment created by this process application.
void	deploy() Deploy this process application into the runtime container.
<T> T	execute(Callable<T> callable) The default implementation simply modifies the Context ClassLoader
<T> T	execute(Callable<T> callable, InvocationContext invocationContext) Is invoked instead of ProcessApplicationInterface.execute(Callable) if a context is available.
BeanELResolver	getBeanElResolver() Returns an instance of BeanELResolver that a process application caches.
ELResolver	getElResolver() This allows the process application to provide a custom ElResolver to the process engine.
Map<String,List<ExecutableScript>>	getEnvironmentScripts() see ProcessApplicationScriptEnvironment.getEnvironmentScripts()
ExecutionListener	getExecutionListener() Allows the process application to provide an ExecutionListener which is notified about all execution events in all of the process instances deployed by this process application.
String	getName()
ClassLoader	getProcessApplicationClassloader() Override this method to provide an environment-specific ClassLoader to be used by the process engine for loading resources from the process application
protected ProcessApplicationScriptEnvironment	getProcessApplicationScriptEnvironment()
Map<String,String>	getProperties() override this method in order to provide a map of properties.
ProcessApplicationInterface	getRawObject() Since ProcessApplicationInterface.getReference() may return a proxy object, this method returs the actual, unproxied object and is meant to be called from the ProcessApplicationInterface.execute(Callable) method.
ScriptEngine	getScriptEngineForName(String name, boolean cache) see ProcessApplicationScriptEnvironment.getScriptEngineForName(String, boolean)
TaskListener	getTaskListener() Allows the process application to provide a TaskListener which is notified about all Task events in all of the process instances deployed by this process application.
VariableSerializers	getVariableSerializers()
protected ELResolver	initProcessApplicationElResolver() Initializes the process application provided ElResolver.
void	setVariableSerializers(VariableSerializers variableSerializers)
void	undeploy() Undeploy this process application from the runtime container.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.camunda.bpm.application.ProcessApplicationInterface

getReference

Field Detail

processApplicationElResolver

protected ELResolver processApplicationElResolver

processApplicationBeanElResolver

protected BeanELResolver processApplicationBeanElResolver

processApplicationScriptEnvironment

protected ProcessApplicationScriptEnvironment processApplicationScriptEnvironment

variableSerializers

protected VariableSerializers variableSerializers

isDeployed

protected boolean isDeployed

Constructor Detail

AbstractProcessApplication

public AbstractProcessApplication()

Method Detail

deploy

public void deploy()

Description copied from interface: ProcessApplicationInterface

Deploy this process application into the runtime container.

NOTE: on some containers (like JBoss AS 7) the deployment of the process application is performed asynchronously and via introspection at deployment time. This means that there is no guarantee that the process application is fully deployed after this method returns.

If you need a post deployment hook, use the @PostDeploy annotation.

Specified by:

deploy in interface ProcessApplicationInterface

undeploy

public void undeploy()

Description copied from interface: ProcessApplicationInterface

Undeploy this process application from the runtime container.

If your application needs to be notified of the undeployment, add a @PreUndeploy method to your subclass.

Specified by:

undeploy in interface ProcessApplicationInterface

createDeployment

public void createDeployment(String processArchiveName,
                    DeploymentBuilder deploymentBuilder)

Description copied from interface: ProcessApplicationInterface

Override this method in order to programmatically add resources to the deployment created by this process application.

This method is invoked at deployment time once for each process archive deployed by this process application.

NOTE: this method must NOT call the DeploymentBuilder.deploy() method.

Specified by:

createDeployment in interface ProcessApplicationInterface

Parameters:

processArchiveName - the name of the processArchive which is currently being deployed.

deploymentBuilder - the DeploymentBuilder used to construct the deployment.

getName

public String getName()

Specified by:

getName in interface ProcessApplicationInterface

Returns:

the name of this process application

autodetectProcessApplicationName

protected abstract String autodetectProcessApplicationName()

Override this method to autodetect an application name in case the ProcessApplication annotation was used but without parameter.

execute

public <T> T execute(Callable<T> callable)
          throws ProcessApplicationExecutionException

Description copied from interface: ProcessApplicationInterface

The default implementation simply modifies the Context ClassLoader

Specified by:

execute in interface ProcessApplicationInterface

Parameters:

callable - to be executed "within" the context of this process application.

Returns:

the result of the callback

Throws:

ProcessApplicationExecutionException

execute

public <T> T execute(Callable<T> callable,
            InvocationContext invocationContext)
          throws ProcessApplicationExecutionException

Description copied from interface: ProcessApplicationInterface

Is invoked instead of ProcessApplicationInterface.execute(Callable) if a context is available. The default implementation simply forward the call to ProcessApplicationInterface.execute(Callable). A custom implementation can override the method to hook into the invocation.

Specified by:

execute in interface ProcessApplicationInterface

Parameters:

callable - to be executed "within" the context of this process application.

invocationContext - of the current invocation, can be null

Returns:

the result of the callback

Throws:

ProcessApplicationExecutionException

getProcessApplicationClassloader

public ClassLoader getProcessApplicationClassloader()

Description copied from interface: ProcessApplicationInterface

Override this method to provide an environment-specific ClassLoader to be used by the process engine for loading resources from the process application

NOTE: the process engine must never cache any references to this ClassLoader or to classes obtained through this ClassLoader.

Specified by:

getProcessApplicationClassloader in interface ProcessApplicationInterface

Returns:

the ClassLoader that can be used to load classes and resources from this process application.

getRawObject

public ProcessApplicationInterface getRawObject()

Description copied from interface: ProcessApplicationInterface

Since ProcessApplicationInterface.getReference() may return a proxy object, this method returs the actual, unproxied object and is meant to be called from the ProcessApplicationInterface.execute(Callable) method. (ie. from a Callable implementation passed to the method.).

Specified by:

getRawObject in interface ProcessApplicationInterface

getProperties

public Map<String,String> getProperties()

Description copied from interface: ProcessApplicationInterface

override this method in order to provide a map of properties.

The properties are made available globally through the ProcessApplicationService

Specified by:

getProperties in interface ProcessApplicationInterface

See Also:

ProcessApplicationService, ProcessApplicationInfo.getProperties()

getElResolver

public ELResolver getElResolver()

Description copied from interface: ProcessApplicationInterface

This allows the process application to provide a custom ElResolver to the process engine.

The process engine will use this ElResolver whenever it is executing a process in the context of this process application.

The process engine must only call this method from Callable implementations passed to ProcessApplicationInterface.execute(Callable)

Specified by:

getElResolver in interface ProcessApplicationInterface

getBeanElResolver

public BeanELResolver getBeanElResolver()

Description copied from interface: ProcessApplicationInterface

Returns an instance of BeanELResolver that a process application caches.

Has to be managed by the process application since BeanELResolver keeps hard references to classes in a cache.

Specified by:

getBeanElResolver in interface ProcessApplicationInterface

initProcessApplicationElResolver

protected ELResolver initProcessApplicationElResolver()

Initializes the process application provided ElResolver. This implementation uses the Java SE ServiceLoader facilities for resolving implementations of ProcessApplicationElResolver.

If you want to provide a custom implementation in your application, place a file named META-INF/org.camunda.bpm.application.ProcessApplicationElResolver inside your application which contains the fully qualified classname of your implementation. Or simply override this method.

Returns:

the process application ElResolver.

getExecutionListener

public ExecutionListener getExecutionListener()

Description copied from interface: ProcessApplicationInterface

Allows the process application to provide an ExecutionListener which is notified about all execution events in all of the process instances deployed by this process application.

If this method returns 'null', the process application is not notified about execution events.

Specified by:

getExecutionListener in interface ProcessApplicationInterface

Returns:

an ExecutionListener or null.

getTaskListener

public TaskListener getTaskListener()

Description copied from interface: ProcessApplicationInterface

Allows the process application to provide a TaskListener which is notified about all Task events in all of the process instances deployed by this process application.

If this method returns 'null', the process application is not notified about Task events.

Specified by:

getTaskListener in interface ProcessApplicationInterface

Returns:

a TaskListener or null.

getScriptEngineForName

public ScriptEngine getScriptEngineForName(String name,
                                  boolean cache)

see ProcessApplicationScriptEnvironment.getScriptEngineForName(String, boolean)

getEnvironmentScripts

public Map<String,List<ExecutableScript>> getEnvironmentScripts()

see ProcessApplicationScriptEnvironment.getEnvironmentScripts()

getProcessApplicationScriptEnvironment

protected ProcessApplicationScriptEnvironment getProcessApplicationScriptEnvironment()

getVariableSerializers

public VariableSerializers getVariableSerializers()

setVariableSerializers

public void setVariableSerializers(VariableSerializers variableSerializers)