/**
    * Copyright 2005-2014 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.rice.ksb.messaging;
  
  import org.junit.Test;
  import org.kuali.rice.ksb.api.KsbApiServiceLocator;
  import org.kuali.rice.ksb.messaging.bam.BAMTargetEntry;
  import org.kuali.rice.ksb.messaging.bam.service.BAMService;
  import org.kuali.rice.ksb.messaging.callbacks.SimpleCallback;
  import org.kuali.rice.ksb.messaging.service.KSBJavaService;
  import org.kuali.rice.ksb.service.KSBServiceLocator;
  import org.kuali.rice.ksb.test.KSBTestCase;
  
  import javax.xml.namespace.QName;
  import java.util.List;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  /**
   * Tests distributed Queue scenarios
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   * 
   */
  public class DistributedQueueTest extends KSBTestCase {
  
      private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(DistributedQueueTest.class);
      
      public boolean startClient1() {
          return true;
      }
  
      public boolean startClient2() {
          return true;
      }
  
      /**
       * If calling a queue with multiple subscribers only one subscriber should be called.
       * 
       * @throws Exception
       */
      @Test
      public void testSuccessfullyCallingQueueOnce() throws Exception {
          QName serviceName = new QName("testAppsSharedQueue", "sharedQueue");
          KSBJavaService testJavaAsyncService = (KSBJavaService) KsbApiServiceLocator.getMessageHelper().getServiceAsynchronously(serviceName);
          testJavaAsyncService.invoke(new ClientAppServiceSharedPayloadObj("message content", false));
          verifyServiceCalls(serviceName);
  
      }
  
      @Test
      public void testCallingQueueAsnyc() throws Exception {
          KSBTestUtils.setMessagingToAsync();
          // Execute this 100 times, previously when only running a single iteration, this test would pass most of the
          // time but then would occasionally fail, it was possible to reproduce the failure every time by adding
          // these iterations, this allowed us to fix the underlying problem (an issue with KSB callbacks)
          for (int i = 0; i < 100; i++) {
              LOG.info("testCallingQueueAsnyc, iteration: " + i);
              QName serviceName = new QName("testAppsSharedQueue", "sharedQueue");
              SimpleCallback callback = new SimpleCallback();
              KSBJavaService testJavaAsyncService = (KSBJavaService) KsbApiServiceLocator.getMessageHelper().getServiceAsynchronously(serviceName, callback);
              synchronized (callback) {
                  testJavaAsyncService.invoke(new ClientAppServiceSharedPayloadObj("message content", false));
                  callback.waitForAsyncCall();
              }
              verifyServiceCalls(serviceName);
              KSBServiceLocator.getBAMService().clearBAMTables();
          }
      }
  
      private void verifyServiceCalls(QName serviceName) throws Exception {
          BAMService bamService = KSBServiceLocator.getBAMService();
          List<BAMTargetEntry> bamCalls = bamService.getCallsForService(serviceName);
          assertTrue("No service call recorded", bamCalls.size() > 0);
          boolean foundClientCall = false;
          boolean foundServiceCall = false;
          for (BAMTargetEntry bamEntry : bamCalls) {
              if (bamEntry.getServerInvocation()) {
                  foundServiceCall = true;
              } else {
                  foundClientCall = true;
              }
          }
          assertTrue("No client call recorded", foundClientCall);
          assertTrue("No service call recorded", foundServiceCall);
         assertEquals("Wrong number of calls recorded", 2, bamCalls.size());
     }
 
 }