/*
* Copyright 2012 The Solmix Project
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.gnu.org/licenses/
* or see the FSF site: http://www.fsf.org.
*/
package org.solmix.eventweb;
import java.io.IOException;
import java.io.OutputStream;
import java.io.StringWriter;
import java.nio.charset.Charset;
import java.util.Map;
import org.atmosphere.cpr.AtmosphereHandler;
import org.atmosphere.cpr.AtmosphereRequest;
import org.atmosphere.cpr.AtmosphereResource;
import org.atmosphere.cpr.Serializer;
import org.atmosphere.handler.AbstractReflectorAtmosphereHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.solmix.runtime.SystemContext;
import org.solmix.runtime.event.EventManager;
import org.solmix.api.exception.SlxException;
import org.solmix.api.serialize.JSParser;
import org.solmix.commons.util.IOUtils;
import org.solmix.fmk.SlxContext;
import org.solmix.fmk.serialize.JSParserFactoryImpl;
/**
* This is a bridge between Solmix Event service and Atmosphere framework.
*
* @author solmix.f@gmail.com
* @version $Id$ 2013-9-30
*/
public class SolmixEventHandler extends AbstractReflectorAtmosphereHandler implements AtmosphereHandler
{
static final Logger logger = LoggerFactory.getLogger("AtmosphereHandler");
private String eventTopics;
private JSParser jsonParser;
/**
* {@inheritDoc}
*
* @see org.atmosphere.cpr.AtmosphereHandler#onRequest(org.atmosphere.cpr.AtmosphereResource)
*/
@Override
public void onRequest(AtmosphereResource r) throws IOException {
AtmosphereRequest request = r.getRequest();
String httpMethod = request.getMethod();
if (httpMethod.equalsIgnoreCase("GET")) {
doGet(r);
} else if (httpMethod.equalsIgnoreCase("POST")) {
doPost(r);
}
}
/**
* @param r
*/
protected void doGet(final AtmosphereResource r) {
r.getResponse().setCharacterEncoding(r.getRequest().getCharacterEncoding());
r.getResponse().setContentType("application/json");
r.setSerializer(new Serializer() {
Charset charset = Charset.forName(r.getResponse().getCharacterEncoding());
@Override
public void write(OutputStream os, Object o) throws IOException {
try {
if (logger.isDebugEnabled())
logger.debug("Writing object to JSON outputstream with charset: " + charset.displayName());
StringWriter out = new StringWriter();
getJSParser().toJSON(out, o);
os.write(out.toString().getBytes(charset));
os.flush();
} catch (SlxException e) {
throw new IOException("Failed to serialize object to JSON", e);
}
}
});
r.suspend();
}
/**
* @return
*/
protected JSParser getJSParser() {
if (jsonParser == null) {
jsonParser = JSParserFactoryImpl.getInstance().get();
}
return jsonParser;
}
/**
* Deliver the event to Solmix Event-Manager service.
*
* @param r
*/
@SuppressWarnings("unchecked")
protected void doPost(AtmosphereResource r) {
StringWriter out = new StringWriter();
try {
IOUtils.copyCharacterStreams(r.getRequest().getReader(), out);
} catch (IOException e) {
logger.error("Can't read data from request", e);
}
String queryStr = out.toString();
DelegateClientEvent event = null;
try {
Map<String, Object> data = getJSParser().toJavaObject(queryStr, Map.class);
if (data != null && data.size() != 0) {
event = new DelegateClientEvent(data);
event.setBroadcasterID(r.getBroadcaster().getID());
SystemContext sc = SlxContext.getThreadSystemContext();
EventManager em = sc.getExtension(EventManager.class);
em.postEvent(event);
}
} catch (SlxException e) {
logger.error("Can't parser string to JavaObject", e);
}
}
/**
* {@inheritDoc}
*
* @see org.atmosphere.cpr.AtmosphereHandler#destroy()
*/
@Override
public void destroy() {
// TODO Auto-generated method stub
}
/**
* @return the eventTopic
*/
public String getEventTopics() {
return eventTopics;
}
/**
* @param eventTopic the eventTopic to set
*/
public void setEventTopic(String eventTopics) {
this.eventTopics = eventTopics;
}
}