org.drools.runtime.process
Interface WorkItem

public interface WorkItem

Represents one unit of work that needs to be executed. It contains all the information that it necessary to execute this unit of work as parameters, and (possibly) results related to its execution. WorkItems represent a unit of work in an abstract, high-level and implementation-independent manner. They are created by the engine whenever an external task needs to be performed. The engine will delegate the work item to the appropriate WorkItemHandler for execution. Whenever a work item is completed (or whenever the work item cannot be executed and should be aborted), the work item manager should be notified. For example, a work item could be created whenever an email needs to be sent. This work item would have a name that represents the type of work that needs to be executed (e.g. "Email") and parameters related to its execution (e.g. "From" = "me@mail.com", "To" = ..., "Body" = ..., ...). Result parameters can contain results related to the execution of this work item (e.g. "Success" = true).

See Also:

WorkItemHandler, WorkItemManager

Field Summary

static int	ABORTED
static int	ACTIVE
static int	COMPLETED
static int	PENDING

Method Summary

long	getId() The unique id of this work item
String	getName() The name of the work item.
Object	getParameter(String name) Returns the value of the parameter with the given name.
Map<String,Object>	getParameters() Returns the map of parameters of this work item.
long	getProcessInstanceId() The id of the process instance that requested the execution of this work item
Object	getResult(String name) Returns the value of the result parameter with the given name.
Map<String,Object>	getResults() Returns the map of result parameters of this work item.
int	getState() The state of the work item.

Field Detail

PENDING

static final int PENDING

See Also:

Constant Field Values

ACTIVE

static final int ACTIVE

See Also:

Constant Field Values

COMPLETED

static final int COMPLETED

See Also:

Constant Field Values

ABORTED

static final int ABORTED

See Also:

Constant Field Values

Method Detail

getId

long getId()

The unique id of this work item

Returns:

the id of this work item

getName

String getName()

The name of the work item. This represents the type of work that should be executed.

Returns:

the name of the work item

getState

int getState()

The state of the work item.

Returns:

the state of the work item

getParameter

Object getParameter(String name)

Returns the value of the parameter with the given name. Parameters can be used to pass information necessary for the execution of this work item. Returns null if the parameter cannot be found.

Parameters:

name - the name of the parameter

Returns:

the value of the parameter

getParameters

Map<String,Object> getParameters()

Returns the map of parameters of this work item. Parameters can be used to pass information necessary for the execution of this work item.

Returns:

the map of parameters of this work item

getResult

Object getResult(String name)

Returns the value of the result parameter with the given name. Result parameters can be used to pass information related the result of the execution of this work item. Returns null if the result cannot be found.

Parameters:

name - the name of the result parameter

Returns:

the value of the result parameter

getResults

Map<String,Object> getResults()

Returns the map of result parameters of this work item. Result parameters can be used to pass information related the result of the execution of this work item.

Returns:

the map of results of this work item

getProcessInstanceId

long getProcessInstanceId()

The id of the process instance that requested the execution of this work item

Returns:

the id of the related process instance