001/* 002 * The MIT License 003 * Copyright (c) 2012 Microsoft Corporation 004 * 005 * Permission is hereby granted, free of charge, to any person obtaining a copy 006 * of this software and associated documentation files (the "Software"), to deal 007 * in the Software without restriction, including without limitation the rights 008 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 009 * copies of the Software, and to permit persons to whom the Software is 010 * furnished to do so, subject to the following conditions: 011 * 012 * The above copyright notice and this permission notice shall be included in 013 * all copies or substantial portions of the Software. 014 * 015 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 016 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 017 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 018 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 019 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 020 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 021 * THE SOFTWARE. 022 */ 023 024package microsoft.exchange.webservices.data.core.request; 025 026import microsoft.exchange.webservices.data.core.ExchangeService; 027import microsoft.exchange.webservices.data.core.enumeration.misc.TraceFlags; 028import microsoft.exchange.webservices.data.core.exception.service.remote.ServiceRequestException; 029import microsoft.exchange.webservices.data.misc.AsyncCallback; 030import microsoft.exchange.webservices.data.misc.AsyncExecutor; 031import microsoft.exchange.webservices.data.misc.AsyncRequestResult; 032import microsoft.exchange.webservices.data.misc.CallableMethod; 033import microsoft.exchange.webservices.data.misc.IAsyncResult; 034 035import java.io.IOException; 036import java.util.concurrent.Callable; 037import java.util.concurrent.Future; 038 039/** 040 * Defines the SimpleServiceRequestBase class. 041 */ 042public abstract class SimpleServiceRequestBase<T> extends ServiceRequestBase<T> { 043 044 /** 045 * Initializes a new instance of the SimpleServiceRequestBase class. 046 */ 047 protected SimpleServiceRequestBase(ExchangeService service) 048 throws Exception { 049 super(service); 050 } 051 052 /** 053 * Executes this request. 054 * 055 * @return response object 056 * @throws Exception on error 057 */ 058 protected T internalExecute() throws Exception { 059 HttpWebRequest response = null; 060 061 try { 062 response = this.validateAndEmitRequest(); 063 return this.readResponse(response); 064 } catch (IOException ex) { 065 // Wrap exception. 066 throw new ServiceRequestException(String. 067 format("The request failed. %s", ex.getMessage()), ex); 068 } catch (Exception e) { 069 if (response != null) { 070 this.getService().processHttpResponseHeaders(TraceFlags. 071 EwsResponseHttpHeaders, response); 072 } 073 074 throw new ServiceRequestException(String.format("The request failed. %s", e.getMessage()), e); 075 } 076 } 077 078 /** 079 * Ends executing this async request. 080 * 081 * @param asyncResult The async result 082 * @return Service response object 083 * @throws Exception on error 084 */ 085 protected T endInternalExecute(IAsyncResult asyncResult) throws Exception { 086 HttpWebRequest response = (HttpWebRequest) asyncResult.get(); 087 return this.readResponse(response); 088 } 089 090 /** 091 * Begins executing this async request. 092 * 093 * @param callback The AsyncCallback delegate. 094 * @return An IAsyncResult that references the asynchronous request. 095 * @throws Exception on error 096 */ 097 public AsyncRequestResult beginExecute(AsyncCallback callback) throws Exception { 098 this.validate(); 099 100 HttpWebRequest request = this.buildEwsHttpWebRequest(); 101 AsyncExecutor es = new AsyncExecutor(); 102 Callable<?> cl = new CallableMethod(request); 103 Future<?> task = es.submit(cl, callback); 104 es.shutdown(); 105 106 return new AsyncRequestResult(this, request, task, null); 107 } 108 109}