content: /*
   * 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.cassandra.hints;
  
  import org.apache.cassandra.diag.DiagnosticEventService;
  import org.apache.cassandra.hints.HintEvent.HintEventType;
  import org.apache.cassandra.hints.HintEvent.HintResult;
  
  /**
   * Utility methods for DiagnosticEvents around hinted handoff.
   */
  final class HintDiagnostics
  {
      private static final DiagnosticEventService service = DiagnosticEventService.instance();
  
      private HintDiagnostics()
      {
      }
  
      static void dispatcherCreated(HintsDispatcher dispatcher)
      {
          if (isEnabled(HintEventType.DISPATCHER_CREATED))
              service.publish(new HintEvent(HintEventType.DISPATCHER_CREATED, dispatcher,
                                            dispatcher.hostId, dispatcher.address, null, null, null, null, null));
      }
  
      static void dispatcherClosed(HintsDispatcher dispatcher)
      {
          if (isEnabled(HintEventType.DISPATCHER_CLOSED))
              service.publish(new HintEvent(HintEventType.DISPATCHER_CLOSED, dispatcher,
                                            dispatcher.hostId, dispatcher.address, null, null, null, null, null));
      }
  
      static void dispatchPage(HintsDispatcher dispatcher)
      {
          if (isEnabled(HintEventType.DISPATCHER_PAGE))
              service.publish(new HintEvent(HintEventType.DISPATCHER_PAGE, dispatcher,
                                            dispatcher.hostId, dispatcher.address, null, null, null, null, null));
      }
  
      static void abortRequested(HintsDispatcher dispatcher)
      {
          if (isEnabled(HintEventType.ABORT_REQUESTED))
              service.publish(new HintEvent(HintEventType.ABORT_REQUESTED, dispatcher,
                                            dispatcher.hostId, dispatcher.address, null, null, null, null, null));
      }
  
      static void pageSuccessResult(HintsDispatcher dispatcher, long success, long failures, long timeouts, long retryDifferentSystem)
      {
          if (isEnabled(HintEventType.DISPATCHER_HINT_RESULT))
              service.publish(new HintEvent(HintEventType.DISPATCHER_HINT_RESULT, dispatcher,
                                            dispatcher.hostId, dispatcher.address, HintResult.PAGE_SUCCESS,
                                            success, failures, timeouts, retryDifferentSystem));
      }
  
      static void pageFailureResult(HintsDispatcher dispatcher, long success, long failures, long timeouts, long retryDifferentSystem)
      {
          if (isEnabled(HintEventType.DISPATCHER_HINT_RESULT))
              service.publish(new HintEvent(HintEventType.DISPATCHER_HINT_RESULT, dispatcher,
                                            dispatcher.hostId, dispatcher.address, HintResult.PAGE_FAILURE,
                                            success, failures, timeouts, retryDifferentSystem));
      }
  
      private static boolean isEnabled(HintEventType type)
      {
          return service.isEnabled(HintEvent.class, type);
      }
  
  }
  