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.activemq.artemis.tests.integration.transports.netty;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Random;
  
  import io.netty.buffer.ByteBuf;
  import io.netty.buffer.Unpooled;
  import io.netty.channel.embedded.EmbeddedChannel;
  import org.apache.activemq.artemis.core.remoting.impl.netty.ActiveMQFrameDecoder2;
  import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
  import org.junit.jupiter.api.Test;
  
  public class ActiveMQFrameDecoder2Test extends ActiveMQTestBase {
  
     private static final int MSG_CNT = 10000;
  
     private static final int MSG_LEN = 1000;
  
     private static final int FRAGMENT_MAX_LEN = 1500;
  
     private static final Random rand = new Random();
  
     @Test
     public void testOrdinaryFragmentation() throws Exception {
        final EmbeddedChannel decoder = new EmbeddedChannel(new ActiveMQFrameDecoder2());
        final byte[] data = new byte[ActiveMQFrameDecoder2Test.MSG_LEN];
        ActiveMQFrameDecoder2Test.rand.nextBytes(data);
  
        ByteBuf src = Unpooled.buffer(ActiveMQFrameDecoder2Test.MSG_CNT * (ActiveMQFrameDecoder2Test.MSG_LEN + 4));
        while (src.writerIndex() < src.capacity()) {
           src.writeInt(ActiveMQFrameDecoder2Test.MSG_LEN);
           src.writeBytes(data);
        }
  
        List<ByteBuf> packets = new ArrayList<>();
        while (src.isReadable()) {
           int length = Math.min(ActiveMQFrameDecoder2Test.rand.nextInt(ActiveMQFrameDecoder2Test.FRAGMENT_MAX_LEN), src.readableBytes());
           packets.add(src.readBytes(length));
        }
  
        int cnt = 0;
        for (ByteBuf p : packets) {
           decoder.writeInbound(p);
           for (;;) {
              ByteBuf frame = (ByteBuf) decoder.readInbound();
              if (frame == null) {
                 break;
              }
              assertEquals(4, frame.readerIndex());
              assertEquals(ActiveMQFrameDecoder2Test.MSG_LEN, frame.readableBytes());
              assertEquals(Unpooled.wrappedBuffer(data), frame);
              cnt++;
              frame.release();
           }
        }
        assertEquals(ActiveMQFrameDecoder2Test.MSG_CNT, cnt);
     }
  
     @Test
     public void testExtremeFragmentation() throws Exception {
        final EmbeddedChannel decoder = new EmbeddedChannel(new ActiveMQFrameDecoder2());
  
        decoder.writeInbound(Unpooled.wrappedBuffer(new byte[]{0}));
        assertNull(decoder.readInbound());
        decoder.writeInbound(Unpooled.wrappedBuffer(new byte[]{0}));
        assertNull(decoder.readInbound());
        decoder.writeInbound(Unpooled.wrappedBuffer(new byte[]{0}));
        assertNull(decoder.readInbound());
        decoder.writeInbound(Unpooled.wrappedBuffer(new byte[]{4}));
        assertNull(decoder.readInbound());
        decoder.writeInbound(Unpooled.wrappedBuffer(new byte[]{5}));
        assertNull(decoder.readInbound());
        decoder.writeInbound(Unpooled.wrappedBuffer(new byte[]{6}));
        assertNull(decoder.readInbound());
        decoder.writeInbound(Unpooled.wrappedBuffer(new byte[]{7}));
        assertNull(decoder.readInbound());
        decoder.writeInbound(Unpooled.wrappedBuffer(new byte[]{8}));
  
        ByteBuf frame = (ByteBuf) decoder.readInbound();
        assertEquals(4, frame.readerIndex());
        assertEquals(4, frame.readableBytes());
        assertEquals(5, frame.getByte(4));
        assertEquals(6, frame.getByte(5));
        assertEquals(7, frame.getByte(6));
        assertEquals(8, frame.getByte(7));
        frame.release();
     }
  }
  