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.simulator;
  
  import java.util.concurrent.TimeUnit;
  
  import org.apache.cassandra.distributed.api.IInvokableInstance;
  import org.apache.cassandra.distributed.api.IMessage;
  import org.apache.cassandra.simulator.systems.SimulatedTime;
  
  /**
   * Action scheduler that simulates ideal networking conditions. Useful to rule out
   * timeouts in some of the verbs to test only a specific subset of Cassandra.
   */
  public class AlwaysDeliverNetworkScheduler implements FutureActionScheduler
  {
      private final SimulatedTime time;
  
      private final long delayNanos;
  
      public AlwaysDeliverNetworkScheduler(SimulatedTime time)
      {
          this(time, TimeUnit.MILLISECONDS.toNanos(10));
      }
      public AlwaysDeliverNetworkScheduler(SimulatedTime time, long delayNanos)
      {
          this.time = time;
          this.delayNanos = delayNanos;
      }
      public DeliverResult shouldDeliver(int from, int to, IInvokableInstance invoker, IMessage message)
      {
          return DELIVER_UNPROTECTED_RESULT;
      }
  
      public long messageDeadlineNanos(int from, int to, boolean protectedMessage)
      {
          return time.nanoTime() + delayNanos;
      }
  
      public long messageTimeoutNanos(long expiresAfterNanos, long expirationIntervalNanos, boolean protectedMessage)
      {
          return expiresAfterNanos + 1;
      }
  
      public long messageFailureNanos(int from, int to, boolean protectedMessage)
      {
          throw new IllegalStateException();
      }
  
      public long schedulerDelayNanos()
      {
          return 1;
      }
  }
  