org.eclipse.smila.processing.bpel
Class ExtensionManager

java.lang.Object
  org.eclipse.smila.processing.bpel.ExtensionManager

Direct Known Subclasses:

PipeletManager, ProcessingServiceManager

public abstract class ExtensionManager
extends java.lang.Object

Utility class with methods needed in implementating ODE extension actitivities for SMILA.

Author:

jschumacher

Constructor Summary

ExtensionManager()

Method Summary

abstract void	checkAvailability(ExtensionAdapter adapter, ODEWorkflowProcessor processor) check if element invoked by the adapter is already available.
void	copyAnnotations(Blackboard blackboard, ProcessorMessage message, Annotatable annotatable) copy annotations from annotable object to each record on blackboard identified by the given Ids.
protected CompilationMessage	createErrorCompilationMessage(java.lang.String key, java.lang.String message) utility method for subclasses to use for creating error messages during activity registration.
abstract ProcessorMessage	doInvoke(ExtensionAdapter adapter, ODEWorkflowProcessor processor, Blackboard blackboard, ProcessorMessage request) actually invoke the adapter.
abstract ExtensionAdapter	doRegisterActivity(OProcess pipelineProcess, OExtensionActivity activity, org.w3c.dom.Element content, java.lang.String key) register extension actvity.
java.lang.String	getActivityKey(OActivity activity) create unique name for given key.
java.util.Collection<ExtensionAdapter>	getAdapters()
java.lang.String	getAttributeOfElement(org.w3c.dom.Element content, java.lang.String localName, java.lang.String attribute) find element with given local name (proc: namespace) and return value of given attribute. return null, if not found.
ExtensionAdapter	getExtensionAdapter(java.lang.String key) get extension adapter for key.
abstract java.lang.String	getExtensionName()
ODEWorkflowProcessor	getProcessor(OActivity activity)
void	invokeActivity(ExtensionContext context, org.w3c.dom.Element element) invoke extension activity from BPEL process.
void	parseAnnotations(org.w3c.dom.Element content, AnnotatableImpl annotatable) parse annotations from given element and attach them to annotatble object.
void	registerActivity(OExtensionActivity activity, ExtensibleElement element) create adapter for detected extension actitity.
void	registerPipeline(ODEWorkflowProcessor processor, javax.xml.namespace.QName processName) register owner of pipeline.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExtensionManager

public ExtensionManager()

Method Detail

registerActivity

public void registerActivity(OExtensionActivity activity,
                             ExtensibleElement element)

create adapter for detected extension actitity. Throws a org.apache.ode.bpel.compiler.api.CompilationException if an error occurs.

Parameters:

activity - the activity to register

element - DOM element from BPEL describing the actvity

doRegisterActivity

public abstract ExtensionAdapter doRegisterActivity(OProcess pipelineProcess,
                                                    OExtensionActivity activity,
                                                    org.w3c.dom.Element content,
                                                    java.lang.String key)

register extension actvity. Should throw a org.apache.ode.bpel.compiler.api.CompilationException if an error occurs.

Parameters:

pipelineProcess - process that contains the activity.

activity - the activity to register

content - XML content of actvity

key - key of actvity

Returns:

adapter for activity.

registerPipeline

public void registerPipeline(ODEWorkflowProcessor processor,
                             javax.xml.namespace.QName processName)

register owner of pipeline.

Parameters:

processor - ODE processor that owns this pipeline.

processName - pipeline to register

getExtensionName

public abstract java.lang.String getExtensionName()

Returns:

local name of tag of watched extension activities

invokeActivity

public void invokeActivity(ExtensionContext context,
                           org.w3c.dom.Element element)

invoke extension activity from BPEL process.

Parameters:

context - BPEL extension context.

element - DOM representation of extension element.

checkAvailability

public abstract void checkAvailability(ExtensionAdapter adapter,
                                       ODEWorkflowProcessor processor)
                                throws ProcessingException

check if element invoked by the adapter is already available.

Parameters:

adapter - adapter to check

processor - associated processor

Throws:

ProcessingException - if elements represented by adapter cannot be invoked.

doInvoke

public abstract ProcessorMessage doInvoke(ExtensionAdapter adapter,
                                          ODEWorkflowProcessor processor,
                                          Blackboard blackboard,
                                          ProcessorMessage request)
                                   throws ProcessingException

actually invoke the adapter.

Parameters:

adapter - adapter to invoke

processor - associated processor

blackboard - blackboard instance to work on.

request - record Ids of request.

Returns:

Ids of result records

Throws:

ProcessingException - error while processing.

getActivityKey

public java.lang.String getActivityKey(OActivity activity)

create unique name for given key.

Parameters:

activity - a ODE activity

Returns:

unique name.

getAdapters

public java.util.Collection<ExtensionAdapter> getAdapters()

Returns:

an unmodifiable collection of all currently known adapters.

getExtensionAdapter

public ExtensionAdapter getExtensionAdapter(java.lang.String key)
                                     throws ProcessingException

get extension adapter for key.

Parameters:

key - activity key

Returns:

associated adapter, if any.

Throws:

ProcessingException - no adapter found.

getProcessor

public ODEWorkflowProcessor getProcessor(OActivity activity)
                                  throws ProcessingException

Parameters:

activity - an extension activity

Returns:

processor owning the process containing this activity.

Throws:

ProcessingException - no processor found.

getAttributeOfElement

public java.lang.String getAttributeOfElement(org.w3c.dom.Element content,
                                              java.lang.String localName,
                                              java.lang.String attribute)

find element with given local name (proc: namespace) and return value of given attribute. return null, if not found.

Parameters:

content - an element to search in.

localName - local name of element to look for.

attribute - attribute name.

Returns:

attribute value if found, else null.

parseAnnotations

public void parseAnnotations(org.w3c.dom.Element content,
                             AnnotatableImpl annotatable)

parse annotations from given element and attach them to annotatble object.

Parameters:

content - DOM objects to search for annotations

annotatable - object to attach annotations to.

copyAnnotations

public void copyAnnotations(Blackboard blackboard,
                            ProcessorMessage message,
                            Annotatable annotatable)
                     throws BlackboardAccessException

copy annotations from annotable object to each record on blackboard identified by the given Ids.

Parameters:

blackboard - blackboard

message - target record Ids.

annotatable - annotation source.

Throws:

BlackboardAccessException - error copying annotations

createErrorCompilationMessage

protected CompilationMessage createErrorCompilationMessage(java.lang.String key,
                                                           java.lang.String message)

utility method for subclasses to use for creating error messages during activity registration. They must throw a org.apache.ode.bpel.compiler.api.CompilationException which needs to be created with a CompilationMessage. The causing exception can be added to the org.apache.ode.bpel.compiler.api.CompilationException itself.

Parameters:

key - activity key

message - message describing the error.

Returns:

CompilationMessage describing an error in phase=0.