001// Copyright 2006, 2007, 2008, 2009 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.tapestry5.internal.services; 016 017import org.apache.tapestry5.services.*; 018 019import java.io.IOException; 020 021/** 022 * Processes component action events sent as requests from the client. Component events include an event type, identify 023 * a page and a component, and may provide additional context strings. 024 * 025 * @see org.apache.tapestry5.services.ComponentEventLinkEncoder 026 */ 027public class ComponentEventDispatcher implements Dispatcher 028{ 029 private final ComponentRequestHandler componentRequestHandler; 030 031 private final ComponentEventLinkEncoder linkEncoder; 032 033 public ComponentEventDispatcher(ComponentRequestHandler componentRequestHandler, 034 ComponentEventLinkEncoder linkEncoder) 035 { 036 this.componentRequestHandler = componentRequestHandler; 037 this.linkEncoder = linkEncoder; 038 } 039 040 public boolean dispatch(Request request, Response response) throws IOException 041 { 042 ComponentEventRequestParameters parameters = linkEncoder.decodeComponentEventRequest(request); 043 044 if (parameters == null) return false; 045 046 componentRequestHandler.handleComponentEvent(parameters); 047 048 return true; 049 } 050}