| /* |
| * 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.felix.eventadmin.impl.tasks; |
| |
| import org.apache.felix.eventadmin.impl.handler.EventHandlerProxy; |
| import org.osgi.service.event.Event; |
| |
| /** |
| * A task that processes an event handler |
| * |
| */ |
| public class HandlerTask implements Runnable |
| { |
| private final EventHandlerProxy task; |
| |
| private final Event event; |
| |
| private final long timeout; |
| |
| private final DenylistLatch handlerLatch; |
| |
| private volatile long startTime; |
| |
| private volatile long endTime; |
| |
| /** |
| * |
| * |
| * @param task Proxy to the event handler |
| * @param event The event to send to the handler |
| * @param timeout Timeout for handler denying |
| * @param handlerLatch The latch used to ensure events fire in proper order |
| */ |
| public HandlerTask(final EventHandlerProxy task, final Event event, final long timeout, final DenylistLatch handlerLatch) |
| { |
| this.task = task; |
| this.event = event; |
| this.timeout = timeout; |
| this.handlerLatch = handlerLatch; |
| this.startTime = -1l; |
| this.endTime = -1l; |
| } |
| |
| /** |
| * Run Hander Event |
| */ |
| @Override |
| public void run() |
| { |
| try |
| { |
| startTime = System.currentTimeMillis(); |
| // execute the task |
| task.sendEvent(event); |
| endTime = System.currentTimeMillis(); |
| checkForDenylist(); |
| } |
| finally |
| { |
| handlerLatch.countDown(); |
| } |
| } |
| |
| public void runWithoutDenylistTiming() |
| { |
| task.sendEvent(event); |
| handlerLatch.countDown(); |
| } |
| |
| /** |
| * This method defines if a timeout handling should be used for the |
| * task. |
| */ |
| public boolean useTimeout() |
| { |
| // we only check the proxy if a timeout is configured |
| if ( this.timeout > 0) |
| { |
| return task.useTimeout(); |
| } |
| return false; |
| } |
| |
| /** |
| * Check to see if we need to deny this handler |
| * |
| */ |
| public void checkForDenylist() |
| { |
| if (useTimeout() && getTaskTime() > this.timeout) |
| { |
| task.denyEventHandler(); |
| } |
| } |
| |
| /** |
| * |
| * Determine the amount of time spent running this task |
| * |
| * @return |
| */ |
| private long getTaskTime() |
| { |
| if (startTime < 0l) |
| { |
| return 0l; |
| } |
| else if(endTime < 0l) |
| { |
| return System.currentTimeMillis() - startTime; |
| } |
| return endTime - startTime; |
| |
| } |
| |
| } |