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.distributed;
  
  import java.io.IOException;
  import java.util.function.Consumer;
  
  import org.apache.cassandra.db.ColumnFamilyStore;
  import org.apache.cassandra.db.Keyspace;
  import org.apache.cassandra.distributed.api.*;
  import org.apache.cassandra.distributed.impl.AbstractCluster;
  import org.apache.cassandra.distributed.impl.Instance;
  import org.apache.cassandra.distributed.shared.Versions;
  import org.apache.cassandra.net.Message;
  
  import static org.apache.cassandra.utils.LocalizeString.toLowerCaseLocalized;
  
  /**
   * A simple cluster supporting only the 'current' Cassandra version, offering easy access to the convenience methods
   * of IInvokableInstance on each node.
   */
  public class Cluster extends AbstractCluster<IInvokableInstance>
  {
      private Cluster(Builder builder)
      {
          super(builder);
      }
  
      protected IInvokableInstance newInstanceWrapper(Versions.Version version, IInstanceConfig config)
      {
          return new Wrapper(version, config);
      }
  
      public static Builder build()
      {
          return new Builder();
      }
  
      public static Builder build(int nodeCount)
      {
          return build().withNodes(nodeCount);
      }
  
      public static Cluster create(int nodeCount, Consumer<IInstanceConfig> configUpdater) throws IOException
      {
          return build(nodeCount).withConfig(configUpdater).start();
      }
  
      public static Cluster create(int nodeCount) throws Throwable
      {
          return build(nodeCount).start();
      }
  
      public static final class Builder extends AbstractBuilder<IInvokableInstance, Cluster, Builder>
      {
          public Builder()
          {
              super(Cluster::new);
              withVersion(CURRENT_VERSION);
          }
      }
  
      public void forEach(IIsolatedExecutor.SerializableRunnable runnable)
      {
          forEach(i -> i.runOnInstance(runnable));
      }
  
      public void enableMessageLogging()
      {
          filters().allVerbs().inbound().messagesMatching((from, to, msg) -> {
              if (!get(1).isShutdown())
              {
                  get(1).acceptsOnInstance((IIsolatedExecutor.SerializableConsumer<IMessage>) (msgPassed) -> {
                      Message decoded = Instance.deserializeMessage(msgPassed);
                      if (!toLowerCaseLocalized(decoded.verb().toString()).contains("gossip"))
                          System.out.println(String.format("MSG %d -> %d: %s | %s", from, to, decoded, decoded.payload));
                  }).accept(msg);
              }
              return false;
          }).drop().on();
      }
  
      @Override
      public void disableAutoCompaction(String keyspace)
      {
          stream().forEach(i -> {
              i.acceptsOnInstance(new DisableAutoCompaction()).accept(keyspace);
          });
      }
  
      // Without this class, lambda is trying to capture too much of the Cluster object, which leads to
      // an attempt to capture unshareable class instances.
      private static class DisableAutoCompaction implements IIsolatedExecutor.SerializableConsumer<String>
      {
          public void accept(String ks)
          {
              for (ColumnFamilyStore cs : Keyspace.open(ks).getColumnFamilyStores())
                  cs.disableAutoCompaction();
          }
      }
  }
  
  