Examples with OrFilter won.bot.framework.eventbot.filter.impl.OrFilter used on opensource projects

Example 1 with OrFilter

use of won.bot.framework.eventbot.filter.impl.OrFilter in project webofneeds by researchstudio-sat.

the class CrawlConnectionDataBehaviour method onActivate.

@Override
protected void onActivate(Optional<Object> message) {
    logger.debug("activating crawling connection data for connection {}", command.getConnectionURI());
    logger.debug("will deactivate autmatically after " + abortTimeout);
    LinkedDataSource linkedDataSource = context.getLinkedDataSource();
    if (linkedDataSource instanceof CachingLinkedDataSource) {
        URI toInvalidate = WonLinkedDataUtils.getEventContainerURIforConnectionURI(command.getConnectionURI(), linkedDataSource);
        ((CachingLinkedDataSource) linkedDataSource).invalidate(toInvalidate);
        ((CachingLinkedDataSource) linkedDataSource).invalidate(toInvalidate, command.getNeedURI());
        URI remoteConnectionUri = WonLinkedDataUtils.getRemoteConnectionURIforConnectionURI(command.getConnectionURI(), linkedDataSource);
        toInvalidate = WonLinkedDataUtils.getEventContainerURIforConnectionURI(remoteConnectionUri, linkedDataSource);
        ((CachingLinkedDataSource) linkedDataSource).invalidate(toInvalidate);
        ((CachingLinkedDataSource) linkedDataSource).invalidate(toInvalidate, command.getNeedURI());
    }
    context.getTaskScheduler().schedule(new Runnable() {

        @Override
        public void run() {
            deactivate();
        }
    }, new Date(System.currentTimeMillis() + abortTimeout.toMillis()));
    ;
    List<Path> propertyPaths = new ArrayList<>();
    PrefixMapping pmap = new PrefixMappingImpl();
    pmap.withDefaultMappings(PrefixMapping.Standard);
    pmap.setNsPrefix("won", WON.getURI());
    pmap.setNsPrefix("msg", WONMSG.getURI());
    propertyPaths.add(PathParser.parse("won:hasEventContainer", pmap));
    propertyPaths.add(PathParser.parse("won:hasEventContainer/rdfs:member", pmap));
    CrawlCommandEvent crawlNeedCommandEvent = new CrawlCommandEvent(command.getNeedURI(), command.getNeedURI(), propertyPaths, 10000, 5);
    propertyPaths = new ArrayList();
    propertyPaths.add(PathParser.parse("won:hasEventContainer", pmap));
    propertyPaths.add(PathParser.parse("won:hasEventContainer/rdfs:member", pmap));
    propertyPaths.add(PathParser.parse("won:hasEventContainer/rdfs:member/msg:hasCorrespondingRemoteMessage", pmap));
    propertyPaths.add(PathParser.parse("won:hasRemoteNeed", pmap));
    propertyPaths.add(PathParser.parse("won:hasRemoteNeed/won:hasEventContainer", pmap));
    propertyPaths.add(PathParser.parse("won:hasRemoteNeed/won:hasEventContainer/rdfs:member", pmap));
    propertyPaths.add(PathParser.parse("won:hasRemoteConnection", pmap));
    propertyPaths.add(PathParser.parse("won:hasRemoteConnection/won:hasEventContainer", pmap));
    propertyPaths.add(PathParser.parse("won:hasRemoteConnection/won:hasEventContainer/rdfs:member", pmap));
    propertyPaths.add(PathParser.parse("won:hasRemoteConnection/won:hasEventContainer/rdfs:member/msg:hasCorrespondingRemoteMessage", pmap));
    CrawlCommandEvent crawlConnectionCommandEvent = new CrawlCommandEvent(command.getNeedURI(), command.getConnectionURI(), propertyPaths, 10000, 5);
    Dataset crawledData = DatasetFactory.createGeneral();
    // add crawlcommand listener
    this.subscribeWithAutoCleanup(CrawlCommandEvent.class, new ActionOnEventListener(context, new OrFilter(new SameEventFilter(crawlNeedCommandEvent), new SameEventFilter(crawlConnectionCommandEvent)), new CrawlAction(context)));
    // when the first crawl succeeds, start the second
    this.subscribeWithAutoCleanup(CrawlCommandSuccessEvent.class, new ActionOnEventListener(context, new CommandResultFilter(crawlNeedCommandEvent), new BaseEventBotAction(context) {

        @Override
        protected void doRun(Event event, EventListener executingListener) throws Exception {
            logger.debug("finished crawling need data. ");
            Dataset dataset = ((CrawlCommandSuccessEvent) event).getCrawledData();
            RdfUtils.addDatasetToDataset(crawledData, dataset);
            // now crawl connection data
            context.getEventBus().publish(crawlConnectionCommandEvent);
        }
    }));
    // when we're done crawling, validate:
    this.subscribeWithAutoCleanup(CrawlCommandSuccessEvent.class, new ActionOnEventListener(context, new CommandResultFilter(crawlConnectionCommandEvent), new BaseEventBotAction(context) {

        @Override
        protected void doRun(Event event, EventListener executingListener) throws Exception {
            logger.debug("finished crawling need data for connection {}", command.getConnectionURI());
            Dataset dataset = ((CrawlCommandSuccessEvent) event).getCrawledData();
            RdfUtils.addDatasetToDataset(crawledData, dataset);
            context.getEventBus().publish(new CrawlConnectionCommandSuccessEvent(command, crawledData));
            deactivate();
        }
    }));
    // when something goes wrong, abort
    this.subscribeWithAutoCleanup(CrawlCommandFailureEvent.class, new ActionOnFirstEventListener(context, new OrFilter(new CommandResultFilter(crawlConnectionCommandEvent), new CommandResultFilter(crawlNeedCommandEvent)), new BaseEventBotAction(context) {

        @Override
        protected void doRun(Event event, EventListener executingListener) throws Exception {
            CrawlCommandFailureEvent failureEvent = (CrawlCommandFailureEvent) event;
            logger.debug("crawling failed for connection {}, message: {}", command.getConnectionURI(), failureEvent.getMessage());
            context.getEventBus().publish(new CrawlConnectionCommandFailureEvent(failureEvent.getMessage(), command));
            deactivate();
        }
    }));
    // start crawling the need  - connection will be crawled when need crawling is done
    context.getEventBus().publish(crawlNeedCommandEvent);
}

Example 2 with OrFilter

use of won.bot.framework.eventbot.filter.impl.OrFilter in project webofneeds by researchstudio-sat.

the class BAAtomicAdditionalParticipantsBaseBot method initializeEventListeners.

@Override
protected void initializeEventListeners() {
    final EventListenerContext ctx = getEventListenerContext();
    final AdditionalParticipantCoordinatorBotContextWrapper botContextWrapper = (AdditionalParticipantCoordinatorBotContextWrapper) getBotContextWrapper();
    final EventBus bus = getEventBus();
    logger.info("info1: No of needs: " + noOfNeeds);
    // wait for all needs to be created
    WaitForNEventsListener allNeedsCreatedListener = new WaitForNEventsListener(ctx, "waitForAllNeedsCreated", noOfNeeds);
    bus.subscribe(NeedCreatedEvent.class, allNeedsCreatedListener);
    // create needs every trigger execution until noOfNeeds are created
    this.participantNeedCreator = new ActionOnEventListener(ctx, "participantCreator", new CreateNeedWithFacetsAction(ctx, botContextWrapper.getParticipantListName(), getParticipantFacetType().getURI()), noOfNonDelayedNeeds - 1);
    bus.subscribe(ActEvent.class, this.participantNeedCreator);
    // create needs every trigger execution until noOfNeeds are created
    this.delayedParticipantNeedCreator = new ActionOnEventListener(ctx, "delayedParticipantCreator", new CreateNeedWithFacetsAction(ctx, botContextWrapper.getParticipantDelayedListName(), getParticipantFacetType().getURI()), noOfDelayedNeeds);
    bus.subscribe(ActEvent.class, this.delayedParticipantNeedCreator);
    // when done, create one coordinator need
    this.coordinatorNeedCreator = new ActionOnEventListener(ctx, "coordinatorCreator", new FinishedEventFilter(participantNeedCreator), new CreateNeedWithFacetsAction(ctx, botContextWrapper.getCoordinatorListName(), getCoordinatorFacetType().getURI()), 1);
    bus.subscribe(FinishedEvent.class, this.coordinatorNeedCreator);
    final Iterator<BATestBotScript> firstPhasescriptIterator = firstPhaseScripts.iterator();
    final Iterator<BATestBotScript> firstPhaseScriptWithDelayIterator = firstPhaseScriptsWithDelay.iterator();
    final Iterator<BATestBotScript> secondPhasescriptIterator = secondPhaseScripts.iterator();
    // final Iterator<BATestBotScript> secondPhasescriptWithDelayIterator = secondPhaseScripts.iterator();
    // make a composite filter, with one filter for each testScriptListener that wait
    // for the FinishedEvents the they emit. That filter will be used to shut
    // down all needs after all the scriptListeners have finished.
    final OrFilter firstPhaseScriptListenerFilter = new OrFilter();
    final OrFilter firstPhaseScriptWithDelayListenerFilter = new OrFilter();
    final OrFilter secondPhaseScriptListenerFilter = new OrFilter();
    // final OrFilter secondPhaseScriptWithDelayListenerFilter = new OrFilter();
    // create a callback that gets called immediately before the connection is established
    ConnectFromListToListAction.ConnectHook scriptConnectHook = new ConnectFromListToListAction.ConnectHook() {

        @Override
        public void onConnect(final URI fromNeedURI, final URI toNeedURI) {
            // create the listener that will execute the script actions
            BATestScriptListener testScriptListener = new BATestScriptListener(ctx, firstPhasescriptIterator.next(), fromNeedURI, toNeedURI, MILLIS_BETWEEN_MESSAGES);
            // remember it so we can check its state later
            firstPhasetestScriptListeners.add(testScriptListener);
            // subscribe it to the relevant events.
            bus.subscribe(ConnectFromOtherNeedEvent.class, testScriptListener);
            bus.subscribe(OpenFromOtherNeedEvent.class, testScriptListener);
            bus.subscribe(MessageFromOtherNeedEvent.class, testScriptListener);
            // add a filter that will wait for the FinishedEvent emitted by that listener
            // wrap it in an acceptance filter to make extra sure we count each listener only once.
            firstPhaseScriptListenerFilter.addFilter(new AcceptOnceFilter(new FinishedEventFilter(testScriptListener)));
            // now we create the listener that is only active in the second phase
            // remember it so we can check its state later
            BATestScriptListener secondPhaseTestScriptListener = new BATestScriptListener(ctx, secondPhasescriptIterator.next(), fromNeedURI, toNeedURI, MILLIS_BETWEEN_MESSAGES);
            secondPhasetestScriptListeners.add(secondPhaseTestScriptListener);
            secondPhaseScriptListenerFilter.addFilter(new AcceptOnceFilter(new FinishedEventFilter(secondPhaseTestScriptListener)));
        }
    };
    ConnectFromListToListAction.ConnectHook scriptConnectWithDelayHook = new ConnectFromListToListAction.ConnectHook() {

        @Override
        public void onConnect(final URI fromNeedURI, final URI toNeedURI) {
            // create the listener that will execute the script actions
            BATestScriptListener testScriptListener = new BATestScriptListener(ctx, firstPhaseScriptWithDelayIterator.next(), fromNeedURI, toNeedURI, MILLIS_BETWEEN_MESSAGES);
            // remember it so we can check its state later
            firstPhasetestScriptWithDelayListeners.add(testScriptListener);
            // subscribe it to the relevant events.
            bus.subscribe(ConnectFromOtherNeedEvent.class, testScriptListener);
            bus.subscribe(OpenFromOtherNeedEvent.class, testScriptListener);
            bus.subscribe(MessageFromOtherNeedEvent.class, testScriptListener);
            // add a filter that will wait for the FinishedEvent emitted by that listener
            // wrap it in an acceptance filter to make extra sure we count each listener only once.
            firstPhaseScriptWithDelayListenerFilter.addFilter(new AcceptOnceFilter(new FinishedEventFilter(testScriptListener)));
            // now we create the listener that is only active in the second phase
            // remember it so we can check its state later
            BATestScriptListener secondPhaseTestScriptListener = new BATestScriptListener(ctx, secondPhasescriptIterator.next(), fromNeedURI, toNeedURI, MILLIS_BETWEEN_MESSAGES);
            secondPhasetestScriptListeners.add(secondPhaseTestScriptListener);
            secondPhaseScriptListenerFilter.addFilter(new AcceptOnceFilter(new FinishedEventFilter(secondPhaseTestScriptListener)));
        }
    };
    // when done, connect the participants to the coordinator
    this.needConnector = new ActionOnEventListener(ctx, "needConnector", new FinishedEventFilter(allNeedsCreatedListener), new ConnectFromListToListAction(ctx, botContextWrapper.getCoordinatorListName(), botContextWrapper.getParticipantListName(), getCoordinatorFacetType().getURI(), getParticipantFacetType().getURI(), MILLIS_BETWEEN_MESSAGES, scriptConnectHook, "Hi!"), 1);
    bus.subscribe(FinishedEvent.class, this.needConnector);
    // wait until the non-delayed participants are connected and done with their scripts
    BaseEventListener waitForNonDelayedConnectsListener = new WaitForNEventsListener(ctx, firstPhaseScriptListenerFilter, noOfNonDelayedNeeds - 1);
    bus.subscribe(FinishedEvent.class, waitForNonDelayedConnectsListener);
    FinishedEventFilter allNonDelayedConnectedFilter = new FinishedEventFilter(waitForNonDelayedConnectsListener);
    this.needConnectorWithDelay = new ActionOnEventListener(ctx, "needConnectorWithDelay", allNonDelayedConnectedFilter, new ConnectFromListToListAction(ctx, botContextWrapper.getCoordinatorListName(), botContextWrapper.getParticipantDelayedListName(), getCoordinatorFacetType().getURI(), getParticipantFacetType().getURI(), MILLIS_BETWEEN_MESSAGES, scriptConnectWithDelayHook, "Hi!"), 1);
    // TODO: MAKE THIS SO URI_LIST_NAME_PARTICIPANT_DELAYED "delayedParticipants" works again
    bus.subscribe(FinishedEvent.class, this.needConnectorWithDelay);
    // for each group member, there are 2 listeners waiting for messages. when they are all finished, we're done.
    this.firstPhaseWithDelayDoneListener = new ActionOnceAfterNEventsListener(ctx, "firstPhaseDoneWithDelayListener", firstPhaseScriptWithDelayListenerFilter, noOfDelayedNeeds, new BaseEventBotAction(ctx) {

        @Override
        protected void doRun(final Event event, EventListener executingListener) throws Exception {
            logger.debug("starting second phase");
            logger.debug("non-delayed listeners: {}", firstPhasetestScriptListeners.size());
            logger.debug("delayed listeners: {}", firstPhasetestScriptWithDelayListeners.size());
            Iterator<BATestScriptListener> firstPhaseListeners = firstPhasetestScriptListeners.iterator();
            Iterator<BATestScriptListener> firstPhaseWithDelayListeners = firstPhasetestScriptWithDelayListeners.iterator();
            Iterator<BATestScriptListener> combinedFirstPhaseListeners = Iterators.concat(firstPhaseListeners, firstPhaseWithDelayListeners);
            logger.debug("# of listeners in second phase: {}", secondPhasetestScriptListeners.size());
            for (BATestScriptListener listener : secondPhasetestScriptListeners) {
                logger.debug("subscribing second phase listener {}", listener);
                // subscribe it to the relevant events.
                bus.subscribe(MessageFromOtherNeedEvent.class, listener);
                bus.subscribe(SecondPhaseStartedEvent.class, listener);
                BATestScriptListener correspondingFirstPhaseListener = combinedFirstPhaseListeners.next();
                listener.setCoordinatorSideConnectionURI(correspondingFirstPhaseListener.getCoordinatorSideConnectionURI());
                listener.setParticipantSideConnectionURI(correspondingFirstPhaseListener.getParticipantSideConnectionURI());
                listener.updateFilterForBothConnectionURIs();
                bus.publish(new SecondPhaseStartedEvent(correspondingFirstPhaseListener.getCoordinatorURI(), correspondingFirstPhaseListener.getCoordinatorSideConnectionURI(), correspondingFirstPhaseListener.getParticipantURI()));
            }
        }
    });
    bus.subscribe(FinishedEvent.class, this.firstPhaseWithDelayDoneListener);
    // for each group member, there are 2 listeners waiting for messages. when they are all finished, we're done.
    this.scriptsDoneListener = new ActionOnceAfterNEventsListener(ctx, "scriptsDoneListener", secondPhaseScriptListenerFilter, noOfNeeds - 1, new DeactivateAllNeedsOfListAction(ctx, botContextWrapper.getParticipantListName()));
    bus.subscribe(FinishedEvent.class, this.scriptsDoneListener);
    // When the needs are deactivated, all connections are closed. wait for the close events and signal work done.
    this.workDoneSignaller = new ActionOnceAfterNEventsListener(ctx, "workDoneSignaller", noOfNeeds - 1, new SignalWorkDoneAction(ctx));
    bus.subscribe(CloseFromOtherNeedEvent.class, this.workDoneSignaller);
}

Example 3 with OrFilter

use of won.bot.framework.eventbot.filter.impl.OrFilter in project webofneeds by researchstudio-sat.

the class BAAtomicBaseBot method initializeEventListeners.

@Override
protected void initializeEventListeners() {
    final EventListenerContext ctx = getEventListenerContext();
    final EventBus bus = getEventBus();
    ParticipantCoordinatorBotContextWrapper botContextWrapper = (ParticipantCoordinatorBotContextWrapper) getBotContextWrapper();
    // create needs every trigger execution until noOfNeeds are created
    this.participantNeedCreator = new ActionOnEventListener(ctx, "participantCreator", new CreateNeedWithFacetsAction(ctx, botContextWrapper.getParticipantListName(), getParticipantFacetType().getURI()), noOfNeeds - 1);
    bus.subscribe(ActEvent.class, this.participantNeedCreator);
    // when done, create one coordinator need
    this.coordinatorNeedCreator = new ActionOnEventListener(ctx, "coordinatorCreator", new FinishedEventFilter(participantNeedCreator), new CreateNeedWithFacetsAction(ctx, botContextWrapper.getCoordinatorListName(), getCoordinatorFacetType().getURI()), 1);
    bus.subscribe(FinishedEvent.class, this.coordinatorNeedCreator);
    FinishedEventFilter coordinatorCreatorFilter = new FinishedEventFilter(coordinatorNeedCreator);
    final Iterator<TwoPhaseScript> scriptIterator = scripts.iterator();
    // make a composite filter, with one filter for each testScriptListener that wait
    // for the FinishedEvents the they emit. That filter will be used to shut
    // down all needs after all the scriptListeners have finished.
    final OrFilter firstPhaseScriptListenerFilter = new OrFilter();
    final OrFilter secondPhaseScriptListenerFilter = new OrFilter();
    // create a callback that gets called immediately before the connection is established
    ConnectFromListToListAction.ConnectHook scriptConnectHook = new ConnectFromListToListAction.ConnectHook() {

        @Override
        public void onConnect(final URI fromNeedURI, final URI toNeedURI) {
            TwoPhaseScript script = scriptIterator.next();
            // create the listener that will execute the script actions
            BATestScriptListener testScriptListener = new BATestScriptListener(ctx, script.getFirstPhaseScript(), fromNeedURI, toNeedURI, MILLIS_BETWEEN_MESSAGES);
            // subscribe it to the relevant events.
            bus.subscribe(ConnectFromOtherNeedEvent.class, testScriptListener);
            bus.subscribe(OpenFromOtherNeedEvent.class, testScriptListener);
            bus.subscribe(MessageFromOtherNeedEvent.class, testScriptListener);
            // add a filter that will wait for the FinishedEvent emitted by that listener
            // wrap it in an acceptance filter to make extra sure we count each listener only once.
            firstPhaseScriptListenerFilter.addFilter(new AcceptOnceFilter(new FinishedEventFilter(testScriptListener)));
            // now we create the listener that is only active in the second phase
            // remember it so we can check its state later
            BATestScriptListener secondPhaseTestScriptListener = new BATestScriptListener(ctx, script.getSecondPhaseScript(), fromNeedURI, toNeedURI, MILLIS_BETWEEN_MESSAGES);
            // remember both listeners as a pair as we'll need them together later
            TwoPhaseScriptListener twoPhaseScriptListener = new TwoPhaseScriptListener(testScriptListener, secondPhaseTestScriptListener);
            scriptListeners.add(twoPhaseScriptListener);
            secondPhaseScriptListenerFilter.addFilter(new AcceptOnceFilter(new FinishedEventFilter(secondPhaseTestScriptListener)));
        }
    };
    // when done, connect the participants to the coordinator
    this.needConnector = new ActionOnceAfterNEventsListener(ctx, "needConnector", noOfNeeds, new ConnectFromListToListAction(ctx, botContextWrapper.getCoordinatorListName(), botContextWrapper.getParticipantListName(), getCoordinatorFacetType().getURI(), getParticipantFacetType().getURI(), MILLIS_BETWEEN_MESSAGES, scriptConnectHook, "Hi!"));
    bus.subscribe(NeedCreatedEvent.class, this.needConnector);
    // for each group member, there are 2 listeners waiting for messages. when they are all finished, we're done.
    this.firstPhaseDoneListener = new ActionOnceAfterNEventsListener(ctx, "firstPhaseDoneListener", firstPhaseScriptListenerFilter, noOfNeeds - 1, new BaseEventBotAction(ctx) {

        @Override
        protected void doRun(final Event event, EventListener executingListener) throws Exception {
            logger.debug("starting second phase");
            for (TwoPhaseScriptListener listener : scriptListeners) {
                logger.debug("subscribing second phase listener {}", listener);
                // subscribe it to the relevant events.
                bus.subscribe(MessageFromOtherNeedEvent.class, listener.getSecondPhaseListener());
                bus.subscribe(SecondPhaseStartedEvent.class, listener.getSecondPhaseListener());
                listener.getSecondPhaseListener().setCoordinatorSideConnectionURI(listener.getFirstPhaseListener().getCoordinatorSideConnectionURI());
                listener.getSecondPhaseListener().setParticipantSideConnectionURI(listener.getFirstPhaseListener().getParticipantSideConnectionURI());
                listener.getSecondPhaseListener().updateFilterForBothConnectionURIs();
                bus.publish(new SecondPhaseStartedEvent(listener.getFirstPhaseListener().getCoordinatorURI(), listener.getFirstPhaseListener().getCoordinatorSideConnectionURI(), listener.getFirstPhaseListener().getParticipantURI()));
            }
        }
    });
    bus.subscribe(FinishedEvent.class, this.firstPhaseDoneListener);
    // for each group member, there are 2 listeners waiting for messages. when they are all finished, we're done.
    this.scriptsDoneListener = new ActionOnceAfterNEventsListener(ctx, "scriptsDoneListener", secondPhaseScriptListenerFilter, noOfNeeds - 1, new DeactivateAllNeedsOfListAction(ctx, botContextWrapper.getParticipantListName()));
    bus.subscribe(FinishedEvent.class, this.scriptsDoneListener);
    // When the needs are deactivated, all connections are closed. wait for the close events and signal work done.
    this.workDoneSignaller = new ActionOnceAfterNEventsListener(ctx, "workDoneSignaller", noOfNeeds - 1, new SignalWorkDoneAction(ctx));
    bus.subscribe(CloseFromOtherNeedEvent.class, this.workDoneSignaller);
}

Example 4 with OrFilter

use of won.bot.framework.eventbot.filter.impl.OrFilter in project webofneeds by researchstudio-sat.

the class BABaseBot method initializeEventListeners.

@Override
protected void initializeEventListeners() {
    final EventListenerContext ctx = getEventListenerContext();
    final EventBus bus = getEventBus();
    ParticipantCoordinatorBotContextWrapper botContextWrapper = (ParticipantCoordinatorBotContextWrapper) getBotContextWrapper();
    // create needs every trigger execution until noOfNeeds are created
    this.participantNeedCreator = new ActionOnEventListener(ctx, "participantCreator", new CreateNeedWithFacetsAction(ctx, botContextWrapper.getParticipantListName(), getParticipantFacetType().getURI()), noOfNeeds - 1);
    bus.subscribe(ActEvent.class, this.participantNeedCreator);
    // when done, create one coordinator need
    this.coordinatorNeedCreator = new ActionOnEventListener(ctx, "coordinatorCreator", new FinishedEventFilter(participantNeedCreator), new CreateNeedWithFacetsAction(ctx, botContextWrapper.getCoordinatorListName(), getCoordinatorFacetType().getURI()), 1);
    bus.subscribe(FinishedEvent.class, this.coordinatorNeedCreator);
    final Iterator<BATestBotScript> scriptIterator = scripts.iterator();
    // make a composite filter, with one filter for each testScriptListener that wait
    // for the FinishedEvents the they emit. That filter will be used to shut
    // down all needs after all the scriptListeners have finished.
    final OrFilter mainScriptListenerFilter = new OrFilter();
    // create a callback that gets called immediately before the connection is established
    ConnectFromListToListAction.ConnectHook scriptConnectHook = new ConnectFromListToListAction.ConnectHook() {

        @Override
        public void onConnect(final URI fromNeedURI, final URI toNeedURI) {
            // create the listener that will execute the script actions
            BATestScriptListener testScriptListener = new BATestScriptListener(ctx, scriptIterator.next(), fromNeedURI, toNeedURI, MILLIS_BETWEEN_MESSAGES);
            // remember it so we can check its state later
            testScriptListeners.add(testScriptListener);
            // subscribe it to the relevant events.
            bus.subscribe(ConnectFromOtherNeedEvent.class, testScriptListener);
            bus.subscribe(OpenFromOtherNeedEvent.class, testScriptListener);
            bus.subscribe(MessageFromOtherNeedEvent.class, testScriptListener);
            // add a filter that will wait for the FinishedEvent emitted by that listener
            // wrap it in an acceptance filter to make extra sure we count each listener only once.
            mainScriptListenerFilter.addFilter(new AcceptOnceFilter(new FinishedEventFilter(testScriptListener)));
        }
    };
    // when done, connect the participants to the coordinator
    this.needConnector = new ActionOnceAfterNEventsListener(ctx, "needConnector", noOfNeeds, new ConnectFromListToListAction(ctx, botContextWrapper.getCoordinatorListName(), botContextWrapper.getParticipantListName(), getCoordinatorFacetType().getURI(), getParticipantFacetType().getURI(), MILLIS_BETWEEN_MESSAGES, scriptConnectHook, "Hi!"));
    bus.subscribe(NeedCreatedEvent.class, this.needConnector);
    // for each group member, there are 2 listeners waiting for messages. when they are all finished, we're done.
    this.scriptsDoneListener = new ActionOnceAfterNEventsListener(ctx, "scriptsDoneListener", mainScriptListenerFilter, noOfNeeds - 1, new DeactivateAllNeedsOfListAction(ctx, botContextWrapper.getParticipantListName()));
    bus.subscribe(FinishedEvent.class, this.scriptsDoneListener);
    // When the needs are deactivated, all connections are closed. wait for the close events and signal work done.
    this.workDoneSignaller = new ActionOnceAfterNEventsListener(ctx, "workDoneSignaller", noOfNeeds - 1, new SignalWorkDoneAction(ctx));
    bus.subscribe(CloseFromOtherNeedEvent.class, this.workDoneSignaller);
}