| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.sling.launchpad.testservices.events; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import javax.servlet.ServletException; |
| |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Properties; |
| import org.apache.felix.scr.annotations.Property; |
| import org.apache.felix.scr.annotations.Service; |
| import org.apache.felix.utils.json.JSONWriter; |
| import org.apache.sling.api.SlingConstants; |
| import org.apache.sling.api.SlingHttpServletRequest; |
| import org.apache.sling.api.SlingHttpServletResponse; |
| import org.apache.sling.api.servlets.SlingSafeMethodsServlet; |
| import org.osgi.service.event.Event; |
| import org.osgi.service.event.EventHandler; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** Count the number of OSGi events that we receive on specific topics, and |
| * report them to clients. |
| */ |
| @SuppressWarnings("serial") |
| @Component(immediate=true, metatype=false) |
| @Service |
| @Properties({ |
| @Property(name="service.description", value="Paths Test Servlet"), |
| @Property(name="service.vendor", value="The Apache Software Foundation"), |
| @Property(name="sling.servlet.paths", value="/testing/EventsCounter"), |
| @Property(name="sling.servlet.extensions", value="json"), |
| @Property( |
| name=org.osgi.service.event.EventConstants.EVENT_TOPIC, |
| value= { |
| SlingConstants.TOPIC_RESOURCE_ADDED, |
| SlingConstants.TOPIC_RESOURCE_RESOLVER_MAPPING_CHANGED |
| }) |
| }) |
| public class EventsCounterImpl extends SlingSafeMethodsServlet implements EventHandler,EventsCounter { |
| |
| private final Map<String, AtomicInteger> counters = new HashMap<String, AtomicInteger>(); |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| public synchronized void handleEvent(Event event) { |
| final String topic = event.getTopic(); |
| AtomicInteger counter = counters.get(topic); |
| if(counter == null) { |
| counter = new AtomicInteger(); |
| counters.put(topic, counter); |
| } |
| counter.incrementAndGet(); |
| log.debug("{} counter is now {}", topic, counter.get()); |
| } |
| |
| public synchronized int getEventsCount(String topic) { |
| final AtomicInteger counter = counters.get(topic); |
| if(counter == null) { |
| log.debug("getEventsCount({}) returns 0, counter not found", topic); |
| return 0; |
| } |
| return counter.get(); |
| } |
| |
| @Override |
| protected void doGet(SlingHttpServletRequest request,SlingHttpServletResponse response) |
| throws ServletException, IOException { |
| response.setContentType("application/json"); |
| response.setCharacterEncoding("UTF-8"); |
| try { |
| final JSONWriter w = new JSONWriter(response.getWriter()); |
| w.object(); |
| for(Map.Entry<String, AtomicInteger> entry : counters.entrySet()) { |
| w.key(entry.getKey()).value(entry.getValue()); |
| } |
| w.endObject(); |
| w.flush(); |
| } catch(IOException je) { |
| throw (IOException)new IOException("JSONException in doGet").initCause(je); |
| } |
| } |
| } |