org.axonframework.eventhandling
Class AbstractClusterSelector
java.lang.Object
org.axonframework.eventhandling.AbstractClusterSelector
- All Implemented Interfaces:
- ClusterSelector
- Direct Known Subclasses:
- AnnotationClusterSelector, ClassNamePatternClusterSelector, ClassNamePrefixClusterSelector
public abstract class AbstractClusterSelector
- extends Object
- implements ClusterSelector
Abstract implementation of the ClusterSelector interface that detects proxies and passes the actual Class of the
Event Listener implementation. Typically, this occurs when annotated event handlers are used. The doSelectCluster(org.axonframework.eventhandling.EventListener, Class)
method, in such case, returns the Class of
the annotated listener.
- Since:
- 2.0
- Author:
- Allard Buijze
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
AbstractClusterSelector
public AbstractClusterSelector()
selectCluster
public Cluster selectCluster(EventListener eventListener)
- Description copied from interface:
ClusterSelector
- Selects the cluster instance that the given
eventListener
should be member of. This may be an existing
(or pre-configured) cluster, as well as a newly created cluster.
When null
is returned, this may cause the Event Listener not to be subscribed to any cluster at all.
- Specified by:
selectCluster
in interface ClusterSelector
- Parameters:
eventListener
- the event listener to select a cluster for
- Returns:
- The Cluster assigned to the listener
doSelectCluster
protected abstract Cluster doSelectCluster(EventListener eventListener,
Class<?> listenerType)
- Select a cluster for the given
eventListener
, which has the actual class listenerType
.
Note that the given listenerType
does not have to be assignable to EventListener
, as
it is possible that the eventListener
acts as a proxy to an instance of listenerType
.
- Parameters:
eventListener
- The listener instance handling the events, possibly a proxylistenerType
- The actual type of the Event Listener
- Returns:
- the cluster to assign the Event Listener to
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