Examples of org.apache.cayenne.event.EventManager$Dispatch

org.apache.cayenne.event.EventManager
This class acts as bridge between an Object that wants to inform others about its current state or a change thereof (Publisher) and a list of objects interested in the Subject (Listeners). @author Dirk Olmes @author Holger Hoffstaette @author Andrus Adamchik

     *            Can't be null.
     * @param properties Properties map used to configure DataRowStore parameters. Can be
     *            null.
     */
    public DataRowStore(String name, Map properties) {
        this(name, properties, new EventManager());
    }

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        if (serverContext.hasChanges()) {
            serverContext.rollbackChanges();


            if (lifecycleEventsEnabled) {
                EventManager eventManager = getEventManager();
                if (eventManager != null) {
                    eventManager.postEvent(
                            new GraphEvent(this, null),
                            DataChannel.GRAPH_ROLLEDBACK_SUBJECT);
                }
            }
        }

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     */
    GraphDiff onFlush(GraphDiff childDiff) {
        childDiff.apply(new ChildDiffLoader(serverContext));


        if (lifecycleEventsEnabled) {
            EventManager eventManager = getEventManager();


            if (eventManager != null) {
                eventManager.postEvent(
                        new GraphEvent(this, childDiff),
                        DataChannel.GRAPH_CHANGED_SUBJECT);
            }
        }

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            diff.apply(clientConverter);
            returnClientDiff = clientConverter.getClientDiff();
        }


        if (lifecycleEventsEnabled) {
            EventManager eventManager = getEventManager();


            if (eventManager != null) {
                CompoundDiff notification = new CompoundDiff();
                notification.add(childDiff);
                notification.add(returnClientDiff);


                eventManager.postEvent(
                        new GraphEvent(this, notification),
                        DataChannel.GRAPH_FLUSHED_SUBJECT);
            }
        }

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                this.mergeHandler = null;
            }


            this.channel = channel;


            EventManager eventManager = (channel != null)
                    ? channel.getEventManager()
                    : null;
            if (eventManager != null) {
                this.mergeHandler = new CayenneContextMergeHandler(this);

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        this.configureLogging();


        // set domain configuration name
        this.setDomainConfigurationName(domainConfigurationName);


        this.eventManager = new EventManager();
    }

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    public ClientChannel(ClientConnection connection) {
        this(connection, false);
    }


    public ClientChannel(ClientConnection connection, boolean channelEventsEnabled) {
        this(connection, channelEventsEnabled, new EventManager(2));
    }

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    /**
     * Wraps GraphDiff in a GraphEvent and sends it via EventManager with specified
     * subject.
     */
    void send(GraphDiff diff, EventSubject subject, Object eventSource) {
        EventManager manager = (context.getChannel() != null) ? context
                .getChannel()
                .getEventManager() : null;


        if (manager != null) {
            GraphEvent e = new GraphEvent(context, eventSource, diff);
            manager.postEvent(e, subject);
        }
    }

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            // check flag again in the synced block...
            if (!dbRelationshipsRefreshNeeded) {
                return;
            }


            EventManager eventLoop = EventManager.getDefaultManager();


            // remove existing relationships
            Iterator removeIt = dbRelationships.iterator();
            while (removeIt.hasNext()) {
                DbRelationship relationship = (DbRelationship) removeIt.next();
                eventLoop.removeListener(
                        this,
                        DbRelationship.PROPERTY_DID_CHANGE,
                        relationship);


                removeIt.remove();
            }


            if (this.dbRelationshipPath != null) {


                ObjEntity entity = (ObjEntity) getSourceEntity();
                if (entity == null) {
                    throw new CayenneRuntimeException(
                            "Can't resolve DbRelationships, null source ObjEntity");
                }


                try {
                    // add new relationships from path
                    Iterator it = entity.resolvePathComponents(new ASTDbPath(
                            this.dbRelationshipPath));


                    while (it.hasNext()) {
                        DbRelationship relationship = (DbRelationship) it.next();


                        // listen for changes
                        eventLoop.addListener(
                                this,
                                "dbRelationshipDidChange",
                                RelationshipEvent.class,
                                DbRelationship.PROPERTY_DID_CHANGE,
                                relationship);

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                this.mergeHandler = null;
            }


            this.channel = channel;


            EventManager eventManager = (channel != null)
                    ? channel.getEventManager()
                    : null;
            if (eventManager != null) {
                this.mergeHandler = new CayenneContextMergeHandler(this);

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org.apache.cayenne.access.DataContextFlushEventHandler

org.apache.cayenne.access.DataContextSharedCacheEmpiricTest

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