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 com.datastax.oss.driver.internal.core.metadata;
  
  import com.datastax.oss.driver.api.core.metadata.Node;
  import com.datastax.oss.driver.internal.core.context.InternalDriverContext;
  import com.datastax.oss.driver.shaded.guava.common.annotations.VisibleForTesting;
  import com.datastax.oss.driver.shaded.guava.common.collect.ImmutableList;
  import com.datastax.oss.driver.shaded.guava.common.collect.ImmutableMap;
  import java.net.InetSocketAddress;
  import java.util.Map;
  import java.util.UUID;
  import net.jcip.annotations.ThreadSafe;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  @ThreadSafe
  public class RemoveNodeRefresh extends NodesRefresh {
  
    private static final Logger LOG = LoggerFactory.getLogger(RemoveNodeRefresh.class);
  
    @VisibleForTesting final InetSocketAddress broadcastRpcAddressToRemove;
  
    RemoveNodeRefresh(InetSocketAddress broadcastRpcAddressToRemove) {
      this.broadcastRpcAddressToRemove = broadcastRpcAddressToRemove;
    }
  
    @Override
    public Result compute(
        DefaultMetadata oldMetadata, boolean tokenMapEnabled, InternalDriverContext context) {
  
      String logPrefix = context.getSessionName();
  
      Map<UUID, Node> oldNodes = oldMetadata.getNodes();
  
      ImmutableMap.Builder<UUID, Node> newNodesBuilder = ImmutableMap.builder();
      Node removedNode = null;
      for (Node node : oldNodes.values()) {
        if (node.getBroadcastRpcAddress().isPresent()
            && node.getBroadcastRpcAddress().get().equals(broadcastRpcAddressToRemove)) {
          removedNode = node;
        } else {
          assert node.getHostId() != null; // nodes in metadata.getNodes() always have their id set
          newNodesBuilder.put(node.getHostId(), node);
        }
      }
  
      if (removedNode == null) {
        // This should never happen because we already check the event in NodeStateManager, but handle
        // just in case.
        LOG.debug("[{}] Couldn't find node {} to remove", logPrefix, broadcastRpcAddressToRemove);
        return new Result(oldMetadata);
      } else {
        LOG.debug("[{}] Removing node {}", logPrefix, removedNode);
        return new Result(
            oldMetadata.withNodes(newNodesBuilder.build(), tokenMapEnabled, false, null, context),
            ImmutableList.of(NodeStateEvent.removed((DefaultNode) removedNode)));
      }
    }
  }
  