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.gms;
  
  import java.io.Serializable;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  import javax.annotation.Nullable;
  
  import org.apache.cassandra.diag.DiagnosticEvent;
  import org.apache.cassandra.locator.InetAddressAndPort;
  
  /**
   * DiagnosticEvent implementation for {@link Gossiper} activities.
   */
  public final class GossiperEvent extends DiagnosticEvent
  {
      private final InetAddressAndPort endpoint;
      @Nullable
      private final Long quarantineExpiration;
      @Nullable
      private final EndpointState localState;
  
      private final Map<InetAddressAndPort, EndpointState> endpointStateMap;
      private final boolean inShadowRound;
      private final Map<InetAddressAndPort, Long> justRemovedEndpoints;
      private final long lastProcessedMessageAt;
      private final Set<InetAddressAndPort> liveEndpoints;
      private final List<String> seeds;
      @Deprecated(since = "CEP-21")
      private final Set<InetAddressAndPort> seedsInShadowRound;
      private final Map<InetAddressAndPort, Long> unreachableEndpoints;
  
  
      public enum GossiperEventType
      {
          MARKED_AS_SHUTDOWN,
          CONVICTED,
          REPLACEMENT_QUARANTINE,
          REPLACED_ENDPOINT,
          EVICTED_FROM_MEMBERSHIP,
          REMOVED_ENDPOINT,
          QUARANTINED_ENDPOINT,
          MARKED_ALIVE,
          REAL_MARKED_ALIVE,
          MARKED_DEAD,
          MAJOR_STATE_CHANGE_HANDLED,
          SEND_GOSSIP_DIGEST_SYN
      }
  
      public GossiperEventType type;
  
  
      GossiperEvent(GossiperEventType type, Gossiper gossiper, InetAddressAndPort endpoint,
                    @Nullable Long quarantineExpiration, @Nullable EndpointState localState)
      {
          this.type = type;
          this.endpoint = endpoint;
          this.quarantineExpiration = quarantineExpiration;
          this.localState = localState;
  
          this.endpointStateMap = gossiper.getEndpointStateMap();
          this.inShadowRound = false; // todo; gossiper.isInShadowRound();
          this.justRemovedEndpoints = gossiper.getJustRemovedEndpoints();
          this.lastProcessedMessageAt = gossiper.getLastProcessedMessageAt();
          this.liveEndpoints = gossiper.getLiveMembers();
          this.seeds = gossiper.getSeeds();
          // Implementation of shadow round has changed with CEP-21, so this is no longer relevant but remains for compatibility
          this.seedsInShadowRound = Collections.emptySet();
          this.unreachableEndpoints = gossiper.getUnreachableEndpoints();
      }
  
      public Enum<GossiperEventType> getType()
      {
          return type;
      }
  
      public HashMap<String, Serializable> toMap()
      {
          // be extra defensive against nulls and bugs
          HashMap<String, Serializable> ret = new HashMap<>();
          if (endpoint != null) ret.put("endpoint", endpoint.getHostAddressAndPort());
          ret.put("quarantineExpiration", quarantineExpiration);
          ret.put("localState", String.valueOf(localState));
          ret.put("endpointStateMap", String.valueOf(endpointStateMap));
          ret.put("inShadowRound", inShadowRound);
          ret.put("justRemovedEndpoints", String.valueOf(justRemovedEndpoints));
          ret.put("lastProcessedMessageAt", lastProcessedMessageAt);
          ret.put("liveEndpoints", String.valueOf(liveEndpoints));
          ret.put("seeds", String.valueOf(seeds));
          ret.put("seedsInShadowRound", String.valueOf(seedsInShadowRound));
          ret.put("unreachableEndpoints", String.valueOf(unreachableEndpoints));
          return ret;
      }
  }
  