org.eclipse.smila.jobmanager.taskgenerator
Interface TaskGenerator

All Known Implementing Classes:

CombineInputWithAllTaskGenerator, DefaultTaskGenerator, TaskGeneratorBase

public interface TaskGenerator

Interface for TaskGenerator implementations. TaskGenerators are used to create (follow-up) tasks for a specifc workflow action/worker.

Method Summary

java.util.List<Task>	createRunOnceTasks(java.util.Map<java.lang.String,Bucket> inputBuckets, java.util.Map<java.lang.String,Bucket> outputBuckets, java.util.Map<java.lang.String,java.lang.String> parameters, java.lang.String workerName) Creates tasks for the RunOnce mode, i.e.
java.util.List<Task>	createTasks(java.util.Map<java.lang.String,java.util.List<BulkInfo>> changedInput, java.util.Map<java.lang.String,Bucket> inputBuckets, java.util.Map<java.lang.String,Bucket> outputBuckets, java.util.Map<java.lang.String,java.lang.String> parameters, java.lang.String workerName)
void	finishTask(Task task, TaskCompletionStatus taskState)
java.lang.String	getName()
void	validateParameters(java.util.Map<java.lang.String,java.lang.String> parameters) Check complex parameters in some task generators if desired.

Method Detail

getName

java.lang.String getName()

Returns:

name of generator, it is used in Worker descriptions to select the generator.

createTasks

java.util.List<Task> createTasks(java.util.Map<java.lang.String,java.util.List<BulkInfo>> changedInput,
                                 java.util.Map<java.lang.String,Bucket> inputBuckets,
                                 java.util.Map<java.lang.String,Bucket> outputBuckets,
                                 java.util.Map<java.lang.String,java.lang.String> parameters,
                                 java.lang.String workerName)
                                 throws TaskGeneratorException

Parameters:

changedInput - key: slot containing added bulks, value: added bulks

inputBuckets - key: input slot name, value: bucket for this slot

outputBuckets - key: output slot name, value: bucket for this slot

parameters - key: param name, value: (evaluated) param value

workerName - (action) worker for which to create new tasks

Returns:

a list of new generated tasks

Throws:

TaskGeneratorException - error while generating tasks

finishTask

void finishTask(Task task,
                TaskCompletionStatus taskState)
                throws TaskGeneratorException

Parameters:

task - The task to be cleaned up

taskState - TODO

Throws:

TaskGeneratorException - error while cleaning up for finished task

createRunOnceTasks

java.util.List<Task> createRunOnceTasks(java.util.Map<java.lang.String,Bucket> inputBuckets,
                                        java.util.Map<java.lang.String,Bucket> outputBuckets,
                                        java.util.Map<java.lang.String,java.lang.String> parameters,
                                        java.lang.String workerName)
                                        throws TaskGeneratorException

Creates tasks for the RunOnce mode, i.e. for all objects in the input bucket of the start action.

Parameters:

inputBuckets - key: input slot name, value: bucket for this slot

outputBuckets - key: output slot name, value: bucket for this slot

parameters - key: param name, value: (evaluated) param value

workerName - (action) worker for which to create new tasks

Returns:

a list of new generated tasks

Throws:

TaskGeneratorException - error while generating tasks

validateParameters

void validateParameters(java.util.Map<java.lang.String,java.lang.String> parameters)
                        throws TaskGeneratorException

Check complex parameters in some task generators if desired. Do nothing if no check desired.

Parameters:

parameters - The map with the parameters

Throws:

TaskGeneratorException - an exception if something is wrong with the parameters