| /******************************************************************************* |
| * 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.ofbiz.service; |
| |
| import java.util.Map; |
| |
| import org.apache.ofbiz.base.util.Debug; |
| |
| /** |
| * Generic Result Waiter Class |
| */ |
| @SuppressWarnings("serial") |
| public class GenericResultWaiter implements GenericRequester { |
| |
| public static final String module = GenericResultWaiter.class.getName(); |
| |
| /** Status code for a running service */ |
| public static final int SERVICE_RUNNING = -1; |
| /** Status code for a failed service */ |
| public static final int SERVICE_FAILED = 0; |
| /** Status code for a successful service */ |
| public static final int SERVICE_FINISHED = 1; |
| |
| private boolean completed = false; |
| private int status = -1; |
| private Map<String, Object> result = null; |
| private Throwable t = null; |
| |
| /** |
| * @see org.apache.ofbiz.service.GenericRequester#receiveResult(java.util.Map) |
| */ |
| public synchronized void receiveResult(Map<String, Object> result) { |
| this.result = result; |
| completed = true; |
| status = SERVICE_FINISHED; |
| notify(); |
| if (Debug.verboseOn()) |
| Debug.logVerbose("Received Result (" + completed + ") -- " + result, module); |
| } |
| |
| /** |
| * @see org.apache.ofbiz.service.GenericRequester#receiveThrowable(java.lang.Throwable) |
| */ |
| public synchronized void receiveThrowable(Throwable t) { |
| this.t = t; |
| completed = true; |
| status = SERVICE_FAILED; |
| notify(); |
| } |
| |
| /** |
| * Returns the status of the service. |
| * @return int Status code |
| */ |
| public synchronized int status() { |
| return this.status; |
| } |
| |
| /** |
| * If the service has completed return true |
| * @return boolean |
| */ |
| public synchronized boolean isCompleted() { |
| return completed; |
| } |
| |
| /** |
| * Returns the exception which was thrown or null if none |
| * @return Exception |
| */ |
| public synchronized Throwable getThrowable() { |
| if (!isCompleted()) |
| throw new java.lang.IllegalStateException("Cannot return exception, synchronous call has not completed."); |
| return this.t; |
| } |
| |
| /** |
| * Gets the results of the service or null if none |
| * @return Map |
| */ |
| public synchronized Map<String, Object> getResult() { |
| if (!isCompleted()) |
| throw new java.lang.IllegalStateException("Cannot return result, asynchronous call has not completed."); |
| return result; |
| } |
| |
| /** |
| * Waits for the service to complete |
| * @return Map |
| */ |
| public synchronized Map<String, Object> waitForResult() { |
| return this.waitForResult(10); |
| } |
| |
| /** |
| * Waits for the service to complete, check the status ever n milliseconds |
| * @param milliseconds |
| * @return Map |
| */ |
| public synchronized Map<String, Object> waitForResult(long milliseconds) { |
| if (Debug.verboseOn()) Debug.logVerbose("Waiting for results...", module); |
| while (!isCompleted()) { |
| try { |
| this.wait(milliseconds); |
| if (Debug.verboseOn()) Debug.logVerbose("Waiting...", module); |
| } catch (java.lang.InterruptedException e) { |
| Debug.logError(e, module); |
| } |
| } |
| return this.getResult(); |
| } |
| } |
| |