/*
* Copyright 2012 Research Studios Austria Forschungsges.m.b.H.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package won.bot.framework.eventbot.listener.impl;
import org.apache.jena.query.Dataset;
import won.bot.framework.eventbot.EventListenerContext;
import won.bot.framework.eventbot.event.ConnectionSpecificEvent;
import won.bot.framework.eventbot.event.Event;
import won.bot.framework.eventbot.event.impl.monitor.MessageDispatchStartedEvent;
import won.bot.framework.eventbot.event.impl.monitor.MessageDispatchedEvent;
import won.bot.framework.eventbot.filter.EventFilter;
import won.bot.framework.eventbot.listener.AbstractHandleFirstNEventsListener;
import won.protocol.exception.WonMessageBuilderException;
import won.protocol.message.WonMessage;
import won.protocol.message.WonMessageBuilder;
import won.protocol.service.WonNodeInformationService;
import won.protocol.util.WonRdfUtils;
import java.net.URI;
import java.util.Date;
/**
* Listener that responds to open and message events with automatic messages.
* Can be configured to apply a timeout (non-blocking) before sending messages.
* Can be configured to send a fixed number of messages and then unsubscribe from events.
*/
public class AutomaticMonitoredMessageResponderListener extends AbstractHandleFirstNEventsListener
{
private long millisTimeoutBeforeReply = 1000;
public AutomaticMonitoredMessageResponderListener(final EventListenerContext context, final int targetNumberOfMessages, final long millisTimeoutBeforeReply)
{
super(context, targetNumberOfMessages);
this.millisTimeoutBeforeReply = millisTimeoutBeforeReply;
}
public AutomaticMonitoredMessageResponderListener(final EventListenerContext context, final EventFilter eventFilter, final int targetCount, final long millisTimeoutBeforeReply)
{
super(context, eventFilter, targetCount);
this.millisTimeoutBeforeReply = millisTimeoutBeforeReply;
}
public AutomaticMonitoredMessageResponderListener(final EventListenerContext context, final String name, final int targetCount, final long millisTimeoutBeforeReply)
{
super(context, name, targetCount);
this.millisTimeoutBeforeReply = millisTimeoutBeforeReply;
}
public AutomaticMonitoredMessageResponderListener(final EventListenerContext context, final String name, final EventFilter eventFilter, final int targetCount, final long millisTimeoutBeforeReply)
{
super(context, name, eventFilter, targetCount);
this.millisTimeoutBeforeReply = millisTimeoutBeforeReply;
}
@Override
protected void handleFirstNTimes(final Event event) throws Exception
{
if (event instanceof ConnectionSpecificEvent){
handleMessageEvent((ConnectionSpecificEvent) event);
}
}
private void handleMessageEvent(final ConnectionSpecificEvent messageEvent){
getEventListenerContext().getTaskScheduler().schedule(new Runnable()
{
@Override
public void run()
{
EventListenerContext ctx = getEventListenerContext();
String message = createMessage();
URI connectionUri = messageEvent.getConnectionURI();
WonMessage wonMessage = createWonMessage(connectionUri, message);
logger.debug("sending message " + message);
try {
// fire start message sending monitor event (message sending includes signing)
ctx.getEventBus().publish(new MessageDispatchStartedEvent(wonMessage));
ctx.getWonMessageSender().sendWonMessage(wonMessage);
// fire message is sent monitor event
ctx.getEventBus().publish(new MessageDispatchedEvent(wonMessage));
} catch (Exception e) {
logger.warn("could not send message via connection {}", connectionUri, e);
}
}
}, new Date(System.currentTimeMillis() + this.millisTimeoutBeforeReply));
}
private String createMessage()
{
String message = "auto reply no " + (getCount());
if (getTargetCount() > 0){
message += " of " + getTargetCount();
}
message += "(delay: "+ millisTimeoutBeforeReply + " millis)";
return message;
}
@Override
protected void unsubscribe()
{
logger.debug("unsubscribing from all events");
getEventListenerContext().getEventBus().unsubscribe(this);
}
private WonMessage createWonMessage(URI connectionURI, String message ) throws WonMessageBuilderException {
WonNodeInformationService wonNodeInformationService =
getEventListenerContext().getWonNodeInformationService();
Dataset connectionRDF =
getEventListenerContext().getLinkedDataSource().getDataForResource(connectionURI);
URI remoteNeed = WonRdfUtils.ConnectionUtils.getRemoteNeedURIFromConnection(connectionRDF, connectionURI);
URI localNeed = WonRdfUtils.ConnectionUtils.getLocalNeedURIFromConnection(connectionRDF, connectionURI);
URI wonNode = WonRdfUtils.ConnectionUtils.getWonNodeURIFromConnection(connectionRDF, connectionURI);
Dataset remoteNeedRDF =
getEventListenerContext().getLinkedDataSource().getDataForResource(remoteNeed);
URI messageURI = wonNodeInformationService.generateEventURI(wonNode);
return WonMessageBuilder
.setMessagePropertiesForConnectionMessage(
messageURI,
connectionURI,
localNeed,
wonNode,
WonRdfUtils.ConnectionUtils.getRemoteConnectionURIFromConnection(connectionRDF, connectionURI),
remoteNeed,
WonRdfUtils.NeedUtils.getWonNodeURIFromNeed(remoteNeedRDF, remoteNeed),
message)
.build();
}
}