Java tutorial
/*********************************************************************************************************************** * Copyright (C) 2010-2014 by the Stratosphere project (http://stratosphere.eu) * * Licensed 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 eu.stratosphere.runtime.io.network.netty; import eu.stratosphere.core.memory.MemorySegment; import eu.stratosphere.nephele.jobgraph.JobID; import eu.stratosphere.runtime.io.Buffer; import eu.stratosphere.runtime.io.channels.ChannelID; import eu.stratosphere.runtime.io.network.Envelope; import io.netty.buffer.ByteBuf; import io.netty.channel.embedded.EmbeddedChannel; import junit.framework.Assert; import org.junit.Test; import java.nio.ByteBuffer; import java.util.Random; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.when; public class OutboundEnvelopeEncoderTest { private final long RANDOM_SEED = 520346508276087l; private final Random random = new Random(RANDOM_SEED); private static final int NUM_RANDOM_ENVELOPES = 512; private static final int MAX_EVENTS_SIZE = 1024; private static final int MAX_BUFFER_SIZE = 32768; @Test public void testEncodedSizeAndBufferRecycling() { final ByteBuffer events = ByteBuffer.allocate(MAX_EVENTS_SIZE); final MemorySegment segment = new MemorySegment(new byte[MAX_BUFFER_SIZE]); final Buffer buffer = mock(Buffer.class); when(buffer.getMemorySegment()).thenReturn(segment); final EmbeddedChannel channel = new EmbeddedChannel(new OutboundEnvelopeEncoder()); int numBuffers = 0; for (int i = 0; i < NUM_RANDOM_ENVELOPES; i++) { Envelope env = new Envelope(i, new JobID(), new ChannelID()); int expectedEncodedMsgSize = OutboundEnvelopeEncoder.HEADER_SIZE; if (random.nextBoolean()) { int eventsSize = random.nextInt(MAX_EVENTS_SIZE + 1); expectedEncodedMsgSize += eventsSize; events.clear(); events.limit(eventsSize); env.setEventsSerialized(events); } if (random.nextBoolean()) { numBuffers++; int bufferSize = random.nextInt(MAX_BUFFER_SIZE + 1); when(buffer.size()).thenReturn(bufferSize); env.setBuffer(buffer); expectedEncodedMsgSize += bufferSize; } Assert.assertTrue(channel.writeOutbound(env)); // -------------------------------------------------------------------- // verify encoded ByteBuf size // -------------------------------------------------------------------- ByteBuf encodedMsg = (ByteBuf) channel.readOutbound(); Assert.assertEquals(expectedEncodedMsgSize, encodedMsg.readableBytes()); encodedMsg.release(); } // -------------------------------------------------------------------- // verify buffers are recycled // -------------------------------------------------------------------- verify(buffer, times(numBuffers)).recycleBuffer(); } }