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   * 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.transport;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import org.junit.Assert;
  import org.junit.Before;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.exceptions.InvalidRequestException;
  import org.apache.cassandra.net.FrameEncoder;
  import org.apache.cassandra.transport.messages.QueryMessage;
  import org.assertj.core.api.Assertions;
  
  public class MessageSizeLimitTest extends NativeProtocolLimitsTestBase
  {
      private static final int MAX_CQL_MESSAGE_SIZE = FrameEncoder.Payload.MAX_SIZE * 3;
      private static final int TOO_BIG_MESSAGE_SIZE = MAX_CQL_MESSAGE_SIZE * 2;
      private static final int NORMAL_MESSAGE_SIZE = MAX_CQL_MESSAGE_SIZE - 500;
  
      @BeforeClass
      public static void setUp()
      {
          DatabaseDescriptor.setNativeTransportReceiveQueueCapacityInBytes(1);
          DatabaseDescriptor.setNativeTransportMaxRequestDataInFlightPerIpInBytes(MAX_CQL_MESSAGE_SIZE);
          DatabaseDescriptor.setNativeTransportConcurrentRequestDataInFlightInBytes(MAX_CQL_MESSAGE_SIZE);
          DatabaseDescriptor.setNativeTransportMaxMessageSizeInBytes(MAX_CQL_MESSAGE_SIZE);
          requireNetwork();
      }
  
      @Before
      public void setLimits()
      {
          ClientResourceLimits.setGlobalLimit(MAX_CQL_MESSAGE_SIZE);
          ClientResourceLimits.setEndpointLimit(MAX_CQL_MESSAGE_SIZE);
      }
  
      @Test
      public void sendMessageWithSizeMoreThanMaxMessageSize()
      {
          runClientLogic((client) ->
                 {
                     QueryMessage tooBigQueryMessage = queryMessage(TOO_BIG_MESSAGE_SIZE);
                     Assertions.assertThatThrownBy(() -> client.execute(tooBigQueryMessage))
                               .hasCauseInstanceOf(InvalidRequestException.class);
                     // InvalidRequestException: CQL Message of size 524362 bytes exceeds allowed maximum of 262144 bytes
  
                     // we send one more message to check that the server continues to process new messages in the opened connection
                     QueryMessage queryMessage = queryMessage(NORMAL_MESSAGE_SIZE);
                     client.execute(queryMessage);
                 }
          );
      }
  
      @Test(timeout = 30_000)
      public void checkThatThereIsNoStarvationForMultiFrameMessages() throws InterruptedException
      {
          runClientLogic((client) -> {}, true); // to create table
          AtomicInteger completedSuccessfully = new AtomicInteger(0);
          int threadsCount = 2;
          List<Thread> threads = new ArrayList<>();
          for (int i = 0; i < threadsCount; i++)
          {
              threads.add(new Thread(() -> runClientLogic((client) -> {
                      sendMessages(client, 100, NORMAL_MESSAGE_SIZE);
                      completedSuccessfully.incrementAndGet();
                  }, false))
              );
          }
          for (Thread thread : threads)
              thread.start();
  
          for (Thread thread : threads)
              thread.join();
  
          Assert.assertEquals("not all messages were sent successfully by all threads",
                              threadsCount, completedSuccessfully.get());
      }
  
      private void sendMessages(SimpleClient client, int messagesCount, int messageSize)
      {
          for (int i = 0; i < messagesCount; i++)
          {
              QueryMessage queryMessage1 = queryMessage(messageSize);
              client.execute(queryMessage1);
          }
      }
  
      @Test
      public void sendMessageWithSizeBelowLimit()
      {
          runClientLogic((client) ->
                 {
                     QueryMessage queryMessage = queryMessage(NORMAL_MESSAGE_SIZE);
                     client.execute(queryMessage);
  
                     // run one more time, to validate that the connection is still alive
                     queryMessage = queryMessage(NORMAL_MESSAGE_SIZE);
                     client.execute(queryMessage);
                 }
          );
      }
  }
  