public class DefaultEventManager extends Object implements EventManager
EventManager
.Modifier and Type | Field and Description |
---|---|
protected List<org.apache.cayenne.event.DefaultEventManager.Dispatch> |
eventQueue |
protected boolean |
singleThread |
protected boolean |
stopped |
protected Map<EventSubject,org.apache.cayenne.event.DispatchQueue> |
subjects |
Constructor and Description |
---|
DefaultEventManager()
Creates a multithreaded EventManager using default thread count.
|
DefaultEventManager(int dispatchThreadCount)
Creates an EventManager starting the specified number of threads for multithreaded
dispatching.
|
Modifier and Type | Method and Description |
---|---|
void |
addListener(Object listener,
String methodName,
Class<?> eventParameterClass,
EventSubject subject)
Register an
EventListener for events sent by any sender. |
void |
addListener(Object listener,
String methodName,
Class<?> eventParameterClass,
EventSubject subject,
Object sender)
Register an
EventListener for events sent by a specific sender. |
protected void |
addListener(Object listener,
String methodName,
Class<?> eventParameterClass,
EventSubject subject,
Object sender,
boolean blocking) |
void |
addNonBlockingListener(Object listener,
String methodName,
Class<?> eventParameterClass,
EventSubject subject) |
void |
addNonBlockingListener(Object listener,
String methodName,
Class<?> eventParameterClass,
EventSubject subject,
Object sender) |
boolean |
isSingleThreaded()
Returns true if this EventManager is single-threaded.
|
boolean |
isStopped()
Returns true if the EventManager was stopped via
shutdown() method. |
void |
postEvent(EventObject event,
EventSubject subject)
Sends an event to all registered objects about a particular subject.
|
void |
postNonBlockingEvent(EventObject event,
EventSubject subject)
Sends an event to all registered objects about a particular subject.
|
boolean |
removeAllListeners(EventSubject subject)
Removes all listeners for a given subject.
|
boolean |
removeListener(Object listener)
Unregister the specified listener from all event subjects handled by this manager
instance.
|
boolean |
removeListener(Object listener,
EventSubject subject)
Unregister the specified listener for the events about the given subject.
|
boolean |
removeListener(Object listener,
EventSubject subject,
Object sender)
Unregister the specified listener for the events about the given subject and the
given sender.
|
void |
shutdown()
Stops event threads.
|
protected Map<EventSubject,org.apache.cayenne.event.DispatchQueue> subjects
protected List<org.apache.cayenne.event.DefaultEventManager.Dispatch> eventQueue
protected boolean singleThread
protected volatile boolean stopped
public DefaultEventManager()
public DefaultEventManager(int dispatchThreadCount)
public boolean isStopped()
shutdown()
method.public boolean isSingleThreaded()
isSingleThreaded
in interface EventManager
@BeforeScopeEnd public void shutdown()
public void addListener(Object listener, String methodName, Class<?> eventParameterClass, EventSubject subject)
EventListener
for events sent by any sender.addListener
in interface EventManager
RuntimeException
- if methodName
is not foundaddListener(Object, String, Class, EventSubject, Object)
public void addNonBlockingListener(Object listener, String methodName, Class<?> eventParameterClass, EventSubject subject)
addNonBlockingListener
in interface EventManager
public void addListener(Object listener, String methodName, Class<?> eventParameterClass, EventSubject subject, Object sender)
EventListener
for events sent by a specific sender.addListener
in interface EventManager
listener
- the object to be notified about eventsmethodName
- the name of the listener method to be invokedeventParameterClass
- the class of the single event argument passed to
methodName
subject
- the event subject that the listener is interested insender
- the object whose events the listener is interested in;
null
means 'any sender'.RuntimeException
- if methodName
is not foundpublic void addNonBlockingListener(Object listener, String methodName, Class<?> eventParameterClass, EventSubject subject, Object sender)
addNonBlockingListener
in interface EventManager
protected void addListener(Object listener, String methodName, Class<?> eventParameterClass, EventSubject subject, Object sender, boolean blocking)
public boolean removeListener(Object listener)
removeListener
in interface EventManager
listener
- the object to be unregisteredtrue
if listener
could be removed for any
existing subjects, else returns false
.public boolean removeAllListeners(EventSubject subject)
removeAllListeners
in interface EventManager
public boolean removeListener(Object listener, EventSubject subject)
removeListener
in interface EventManager
listener
- the object to be unregisteredsubject
- the subject from which the listener is to be unregisteredtrue
if listener
could be removed for the given
subject, else returns false
.public boolean removeListener(Object listener, EventSubject subject, Object sender)
removeListener
in interface EventManager
listener
- the object to be unregisteredsubject
- the subject from which the listener is to be unregisteredsender
- the object whose events the listener was interested in;
null
means 'any sender'.true
if listener
could be removed for the given
subject, else returns false
.public void postEvent(EventObject event, EventSubject subject)
postEvent
in interface EventManager
event
- the event to be posted to the observerssubject
- the subject about which observers will be notifiedIllegalArgumentException
- if event or subject are nullpublic void postNonBlockingEvent(EventObject event, EventSubject subject)
postNonBlockingEvent
in interface EventManager
event
- the event to be posted to the observerssubject
- the subject about which observers will be notifiedIllegalArgumentException
- if event or subject are nullCopyright © 2001–2017 Apache Cayenne. All rights reserved.