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.arrow.memory.netty;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertInstanceOf;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertNull;
  
  import org.apache.arrow.memory.AllocationManager;
  import org.apache.arrow.memory.ArrowBuf;
  import org.apache.arrow.memory.BufferAllocator;
  import org.apache.arrow.memory.BufferLedger;
  import org.apache.arrow.memory.RootAllocator;
  import org.junit.jupiter.api.Test;
  
  /** Test cases for {@link NettyAllocationManager}. */
  public class TestNettyAllocationManager {
  
    static int CUSTOMIZED_ALLOCATION_CUTOFF_VALUE = 1024;
  
    private RootAllocator createCustomizedAllocator() {
      return new RootAllocator(
          RootAllocator.configBuilder()
              .allocationManagerFactory(
                  new AllocationManager.Factory() {
                    @Override
                    public AllocationManager create(BufferAllocator accountingAllocator, long size) {
                      return new NettyAllocationManager(
                          accountingAllocator, size, CUSTOMIZED_ALLOCATION_CUTOFF_VALUE);
                    }
  
                    @Override
                    public ArrowBuf empty() {
                      return null;
                    }
                  })
              .build());
    }
  
    private void readWriteArrowBuf(ArrowBuf buffer) {
      // write buffer
      for (long i = 0; i < buffer.capacity() / 8; i++) {
        buffer.setLong(i * 8, i);
      }
  
      // read buffer
      for (long i = 0; i < buffer.capacity() / 8; i++) {
        long val = buffer.getLong(i * 8);
        assertEquals(i, val);
      }
    }
  
    /** Test the allocation strategy for small buffers.. */
    @Test
    public void testSmallBufferAllocation() {
      final long bufSize = CUSTOMIZED_ALLOCATION_CUTOFF_VALUE - 512L;
      try (RootAllocator allocator = createCustomizedAllocator();
          ArrowBuf buffer = allocator.buffer(bufSize)) {
  
        assertInstanceOf(BufferLedger.class, buffer.getReferenceManager());
        BufferLedger bufferLedger = (BufferLedger) buffer.getReferenceManager();
  
        // make sure we are using netty allocation manager
        AllocationManager allocMgr = bufferLedger.getAllocationManager();
        assertInstanceOf(NettyAllocationManager.class, allocMgr);
        NettyAllocationManager nettyMgr = (NettyAllocationManager) allocMgr;
  
        // for the small buffer allocation strategy, the chunk is not null
        assertNotNull(nettyMgr.getMemoryChunk());
  
        readWriteArrowBuf(buffer);
      }
    }
  
    /** Test the allocation strategy for large buffers.. */
    @Test
    public void testLargeBufferAllocation() {
      final long bufSize = CUSTOMIZED_ALLOCATION_CUTOFF_VALUE + 1024L;
      try (RootAllocator allocator = createCustomizedAllocator();
          ArrowBuf buffer = allocator.buffer(bufSize)) {
        assertInstanceOf(BufferLedger.class, buffer.getReferenceManager());
        BufferLedger bufferLedger = (BufferLedger) buffer.getReferenceManager();
  
        // make sure we are using netty allocation manager
        AllocationManager allocMgr = bufferLedger.getAllocationManager();
        assertInstanceOf(NettyAllocationManager.class, allocMgr);
        NettyAllocationManager nettyMgr = (NettyAllocationManager) allocMgr;
  
        // for the large buffer allocation strategy, the chunk is null
        assertNull(nettyMgr.getMemoryChunk());
  
        readWriteArrowBuf(buffer);
      }
    }
  }
  