com.amazonaws.services.simpleworkflow.flow.pojo

Class POJOWorkflowDefinition

java.lang.Object

com.amazonaws.services.simpleworkflow.flow.generic.WorkflowDefinition

com.amazonaws.services.simpleworkflow.flow.pojo.POJOWorkflowDefinition

public class POJOWorkflowDefinition
extends WorkflowDefinition

Constructor Summary

Constructors

Constructor and Description
POJOWorkflowDefinition(Object workflowImplmentationInstance, com.amazonaws.services.simpleworkflow.flow.pojo.MethodConverterPair workflowImplementationMethod, Map<String,com.amazonaws.services.simpleworkflow.flow.pojo.MethodConverterPair> signals, com.amazonaws.services.simpleworkflow.flow.pojo.MethodConverterPair getStateMethod, DataConverter converter, DecisionContext context)

Method Summary

Methods

Modifier and Type	Method and Description
Promise<String>	execute(String input) Asynchronous method that implements workflow business logic.
Object	getImplementationInstance()
String	getWorkflowState() Return state that is inserted decision completion through RespondDecisionTaskCompletedRequest.setExecutionContext(String) and later can be retrieved through AmazonSimpleWorkflow.describeWorkflowExecution(com.amazonaws.services.simpleworkflow.model.DescribeWorkflowExecutionRequest) visibility call.
void	signalRecieved(String signalName, String details) Asynchronous method that implements signals handling logic.

Methods inherited from class java.lang.Object

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

Constructor Detail

POJOWorkflowDefinition

public POJOWorkflowDefinition(Object workflowImplmentationInstance,
                      com.amazonaws.services.simpleworkflow.flow.pojo.MethodConverterPair workflowImplementationMethod,
                      Map<String,com.amazonaws.services.simpleworkflow.flow.pojo.MethodConverterPair> signals,
                      com.amazonaws.services.simpleworkflow.flow.pojo.MethodConverterPair getStateMethod,
                      DataConverter converter,
                      DecisionContext context)
                       throws ClassNotFoundException,
                              SecurityException,
                              NoSuchMethodException,
                              NoSuchFieldException

Throws:

ClassNotFoundException

SecurityException

NoSuchMethodException

NoSuchFieldException

Method Detail

execute

public Promise<String> execute(String input)
                        throws WorkflowException

Description copied from class: WorkflowDefinition

Asynchronous method that implements workflow business logic. This method invocation is surrounded by TryCatchFinally. Workflow is completed when TryCatchFinally.doFinally() is executed. So even if return Promise of the method is ready but there is some asynchronous task or activity still not completed workflow is not going to complete.

Specified by:

execute in class WorkflowDefinition

Parameters:

input - Data passed to the worklfow instance during start instance call.

Returns:

Throws:

WorkflowException - Prefer throwing WorkflowException.

signalRecieved

public void signalRecieved(String signalName,
                  String details)
                    throws WorkflowException

Description copied from class: WorkflowDefinition

Asynchronous method that implements signals handling logic. This method invocation is surrounded by the same doTry of TryCatchFinally that is used to execute workflow. It means that non handled failure inside this method causes workflow execution failure.

Specified by:

signalRecieved in class WorkflowDefinition

Throws:

WorkflowException

getWorkflowState

public String getWorkflowState()
                        throws WorkflowException

Description copied from class: WorkflowDefinition

Return state that is inserted decision completion through RespondDecisionTaskCompletedRequest.setExecutionContext(String) and later can be retrieved through AmazonSimpleWorkflow.describeWorkflowExecution(com.amazonaws.services.simpleworkflow.model.DescribeWorkflowExecutionRequest) visibility call. Implementation of this call is expected to be synchronous and is not allowed to invoke any asynchronous operations like creation of new Task or calling methods marked with Asynchronous annotation. It is also expected to be read only operation which is not allowed to modify state of workflow in any way.

Specified by:

getWorkflowState in class WorkflowDefinition

Returns:

current state of the workflow execution.

Throws:

WorkflowException

getImplementationInstance

public Object getImplementationInstance()