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 java.io.Serializable;
  import java.util.HashMap;
  import java.util.UUID;
  import javax.annotation.Nullable;
  
  import org.apache.cassandra.diag.DiagnosticEvent;
  import org.apache.cassandra.locator.InetAddressAndPort;
  
  /**
   * DiagnosticEvent implementation for hinted handoff.
   */
  final class HintEvent extends DiagnosticEvent
  {
      enum HintEventType
      {
          DISPATCHING_STARTED,
          DISPATCHING_PAUSED,
          DISPATCHING_RESUMED,
          DISPATCHING_SHUTDOWN,
  
          DISPATCHER_CREATED,
          DISPATCHER_CLOSED,
  
          DISPATCHER_PAGE,
          DISPATCHER_HINT_RESULT,
  
          ABORT_REQUESTED
      }
  
      enum HintResult
      {
          PAGE_SUCCESS, PAGE_FAILURE
      }
  
      private final HintEventType type;
      private final HintsDispatcher dispatcher;
      private final UUID targetHostId;
      private final InetAddressAndPort targetAddress;
      @Nullable
      private final HintResult dispatchResult;
      @Nullable
      private final Long pageHintsSuccessful;
      @Nullable
      private final Long pageHintsFailed;
      @Nullable
      private final Long pageHintsTimeout;
      @Nullable
      private final Long pageHintsRetryDifferentSystem;
  
      HintEvent(HintEventType type, HintsDispatcher dispatcher, UUID targetHostId, InetAddressAndPort targetAddress,
                @Nullable HintResult dispatchResult, @Nullable Long pageHintsSuccessful,
                @Nullable Long pageHintsFailed, @Nullable Long pageHintsTimeout,
                @Nullable Long pageHintsRetryDifferentSystem)
      {
          this.type = type;
          this.dispatcher = dispatcher;
          this.targetHostId = targetHostId;
          this.targetAddress = targetAddress;
          this.dispatchResult = dispatchResult;
          this.pageHintsSuccessful = pageHintsSuccessful;
          this.pageHintsFailed = pageHintsFailed;
          this.pageHintsTimeout = pageHintsTimeout;
          this.pageHintsRetryDifferentSystem = pageHintsRetryDifferentSystem;
      }
  
      public Enum<HintEventType> getType()
      {
          return type;
      }
  
      public HashMap<String, Serializable> toMap()
      {
          // be extra defensive against nulls and bugs
          HashMap<String, Serializable> ret = new HashMap<>();
          ret.put("targetHostId", targetHostId);
          ret.put("targetAddress", targetAddress.getHostAddressAndPort());
          if (dispatchResult != null) ret.put("dispatchResult", dispatchResult.name());
          if (pageHintsSuccessful != null || pageHintsFailed != null || pageHintsTimeout != null)
          {
              ret.put("hint.page.hints_succeeded", pageHintsSuccessful);
              ret.put("hint.page.hints_failed", pageHintsFailed);
              ret.put("hint.page.hints_timed_out", pageHintsTimeout);
              ret.put("hint.page.hints_retry_different_system", pageHintsRetryDifferentSystem);
          }
          return ret;
      }
  }
  