org.imixs.workflow.engine

Class AsyncEventScheduler

java.lang.Object

org.imixs.workflow.engine.AsyncEventScheduler

@DeclareRoles(value="org.imixs.ACCESSLEVEL.MANAGERACCESS")
 @RunAs(value="org.imixs.ACCESSLEVEL.MANAGERACCESS")
public class AsyncEventScheduler
extends Object

The AsyncEventScheduler starts a scheduler service to process async events in an asynchronous way by calling the AsyncEventService.

The AsyncEventScheduler runs on a non-persistent ejb timer with the interval 'ASYNCEVENT_PROCESSOR_INTERVAL' and an optional delay defined by 'ASYNCEVENT_PROCESSOR_INITIALDELAY'. To enable the processor 'ASYNCEVENT_PROCESSOR_ENABLED' must be set to true (default=false). 'ASYNCEVENT_PROCESSOR_DEADLOCK' deadlock timeout

In a clustered environment this timer runs in each cluster member that contains the EJB. So this means the non-persistent EJB Timer scales horizontal within a clustered environment – e.g. a Kubernetes cluster.

Version:

1.1

Author:

rsoika

See Also:

AsyncEventService

Field Summary

Fields

Modifier and Type	Field and Description
static String	ASYNCEVENT_PROCESSOR_DEADLOCK
static String	ASYNCEVENT_PROCESSOR_ENABLED
static String	ASYNCEVENT_PROCESSOR_INITIALDELAY
static String	ASYNCEVENT_PROCESSOR_INTERVAL
static String	EVENTLOG_TOPIC_ASYNC_EVENT

Constructor Summary

Constructors

Constructor and Description
AsyncEventScheduler()

Method Summary

Modifier and Type	Method and Description
void	init()
void	run(javax.ejb.Timer timer) The method delegates the event processing to the stateless ejb AsyncEventProcessor.

Methods inherited from class java.lang.Object

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

Field Detail

ASYNCEVENT_PROCESSOR_ENABLED

public static final String ASYNCEVENT_PROCESSOR_ENABLED

See Also:

Constant Field Values

ASYNCEVENT_PROCESSOR_INTERVAL

public static final String ASYNCEVENT_PROCESSOR_INTERVAL

See Also:

Constant Field Values

ASYNCEVENT_PROCESSOR_INITIALDELAY

public static final String ASYNCEVENT_PROCESSOR_INITIALDELAY

See Also:

Constant Field Values

ASYNCEVENT_PROCESSOR_DEADLOCK

public static final String ASYNCEVENT_PROCESSOR_DEADLOCK

See Also:

Constant Field Values

EVENTLOG_TOPIC_ASYNC_EVENT

public static final String EVENTLOG_TOPIC_ASYNC_EVENT

See Also:

Constant Field Values

Constructor Detail

AsyncEventScheduler

public AsyncEventScheduler()

Method Detail

init

@PostConstruct
public void init()

run

public void run(javax.ejb.Timer timer)

The method delegates the event processing to the stateless ejb AsyncEventProcessor.

Before processing the eventLog the method releases possible dead locks first. Both methods are running in separate transactions