org.drools.runtime.process
Interface ProcessRuntime

All Known Subinterfaces:

org.drools.runtime.process.InternalProcessRuntime, InternalProcessRuntime, KnowledgeRuntime, StatefulKnowledgeSession

All Known Implementing Classes:

ProcessRuntimeImpl, StatefulProcessSession

public interface ProcessRuntime

The ProcessRuntime is a super-interface for all StatefulKnowledgeSessions.

See Also:

StatefulKnowledgeSession

Method Summary

void	abortProcessInstance(long processInstanceId) Aborts the process instance with the given id.
ProcessInstance	createProcessInstance(String processId, Map<String,Object> parameters) Creates a new process instance (but does not yet start it).
ProcessInstance	getProcessInstance(long processInstanceId) Returns the process instance with the given id.
Collection<ProcessInstance>	getProcessInstances() Returns a collection of currently active process instances.
WorkItemManager	getWorkItemManager() Returns the WorkItemManager related to this session.
void	signalEvent(String type, Object event) Signals the engine that an event has occurred.
void	signalEvent(String type, Object event, long processInstanceId) Signals the process instance that an event has occurred.
ProcessInstance	startProcess(String processId) Start a new process instance.
ProcessInstance	startProcess(String processId, Map<String,Object> parameters) Start a new process instance.
ProcessInstance	startProcessInstance(long processInstanceId) Starts the given process instance (which was created by using createProcesInstance but not yet started).

Method Detail

startProcess

ProcessInstance startProcess(String processId)

Start a new process instance. The process (definition) that should be used is referenced by the given process id.

Parameters:

processId - The id of the process that should be started

Returns:

the ProcessInstance that represents the instance of the process that was started

startProcess

ProcessInstance startProcess(String processId,
                             Map<String,Object> parameters)

Start a new process instance. The process (definition) that should be used is referenced by the given process id. Parameters can be passed to the process instance (as name-value pairs), and these will be set as variables of the process instance.

Parameters:

processId - the id of the process that should be started

parameters - the process variables that should be set when starting the process instance

Returns:

the ProcessInstance that represents the instance of the process that was started

createProcessInstance

ProcessInstance createProcessInstance(String processId,
                                      Map<String,Object> parameters)

Creates a new process instance (but does not yet start it). The process (definition) that should be used is referenced by the given process id. Parameters can be passed to the process instance (as name-value pairs), and these will be set as variables of the process instance. You should only use this method if you need a reference to the process instance before actually starting it. Otherwise, use startProcess.

Parameters:

processId - the id of the process that should be started

parameters - the process variables that should be set when creating the process instance

Returns:

the ProcessInstance that represents the instance of the process that was created (but not yet started)

startProcessInstance

ProcessInstance startProcessInstance(long processInstanceId)

Starts the given process instance (which was created by using createProcesInstance but not yet started). This method can only be called once for each process instance. You should only use this method if you need a reference to the process instance before actually starting it. Otherwise, use startProcess.

Parameters:

processInstanceId - the id of the process instance that needs to be started

Returns:

the ProcessInstance that represents the instance of the process that was started

signalEvent

void signalEvent(String type,
                 Object event)

Signals the engine that an event has occurred. The type parameter defines which type of event and the event parameter can contain additional information related to the event. All process instances that are listening to this type of (external) event will be notified. For performance reasons, this type of event signaling should only be used if one process instance should be able to notify other process instances. For internal event within one process instance, use the signalEvent method that also include the processInstanceId of the process instance in question.

Parameters:

type - the type of event

event - the data associated with this event

signalEvent

void signalEvent(String type,
                 Object event,
                 long processInstanceId)

Signals the process instance that an event has occurred. The type parameter defines which type of event and the event parameter can contain additional information related to the event. All node instances inside the given process instance that are listening to this type of (internal) event will be notified. Note that the event will only be processed inside the given process instance. All other process instances waiting for this type of event will not be notified.

Parameters:

type - the type of event

event - the data associated with this event

processInstanceId - the id of the process instance that should be signaled

getProcessInstances

Collection<ProcessInstance> getProcessInstances()

Returns a collection of currently active process instances. Note that only process instances that are currently loaded and active inside the engine will be returned. When using persistence, it is likely not all running process instances will be loaded as their state will be stored persistently. It is recommended not to use this method to collect information about the state of your process instances but to use a history log for that purpose.

Returns:

a collection of process instances currently active in the session

getProcessInstance

ProcessInstance getProcessInstance(long processInstanceId)

Returns the process instance with the given id. Note that only active process instances will be returned. If a process instance has been completed already, this method will return null.

Parameters:

id - the id of the process instance

Returns:

the process instance with the given id or null if it cannot be found

abortProcessInstance

void abortProcessInstance(long processInstanceId)

Aborts the process instance with the given id. If the process instance has been completed (or aborted), or the process instance cannot be found, this method will throw an IllegalArgumentException.

Parameters:

id - the id of the process instance

getWorkItemManager

WorkItemManager getWorkItemManager()

Returns the WorkItemManager related to this session. This can be used to register new WorkItemHandlers or to complete (or abort) WorkItems.

Returns:

the WorkItemManager related to this session