/***********************************************************************************************************************
* 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.serialization;
import eu.stratosphere.core.memory.MemorySegment;
import eu.stratosphere.runtime.io.Buffer;
import eu.stratosphere.runtime.io.serialization.RecordDeserializer.DeserializationResult;
import eu.stratosphere.runtime.io.serialization.types.SerializationTestType;
import eu.stratosphere.runtime.io.serialization.types.SerializationTestTypeFactory;
import eu.stratosphere.runtime.io.serialization.types.Util;
import junit.framework.Assert;
import org.junit.Test;
import java.util.ArrayDeque;
public class SpanningRecordSerializationTest {
@Test
public void testIntRecordsSpanningMultipleSegments() {
final int SEGMENT_SIZE = 1;
final int NUM_VALUES = 10;
try {
test(Util.randomRecords(NUM_VALUES, SerializationTestTypeFactory.INT), SEGMENT_SIZE);
} catch (Exception e) {
e.printStackTrace();
Assert.fail("Test encountered an unexpected exception.");
}
}
@Test
public void testIntRecordsWithAlignedBuffers () {
final int SEGMENT_SIZE = 64;
final int NUM_VALUES = 64;
try {
test(Util.randomRecords(NUM_VALUES, SerializationTestTypeFactory.INT), SEGMENT_SIZE);
} catch (Exception e) {
e.printStackTrace();
Assert.fail("Test encountered an unexpected exception.");
}
}
@Test
public void testIntRecordsWithUnalignedBuffers () {
final int SEGMENT_SIZE = 31;
final int NUM_VALUES = 248;
try {
test(Util.randomRecords(NUM_VALUES, SerializationTestTypeFactory.INT), SEGMENT_SIZE);
} catch (Exception e) {
e.printStackTrace();
Assert.fail("Test encountered an unexpected exception.");
}
}
@Test
public void testRandomRecords () {
final int SEGMENT_SIZE = 127;
final int NUM_VALUES = 10000;
try {
test(Util.randomRecords(NUM_VALUES), SEGMENT_SIZE);
} catch (Exception e) {
e.printStackTrace();
Assert.fail("Test encountered an unexpected exception.");
}
}
// -----------------------------------------------------------------------------------------------------------------
/**
* Iterates over the provided records and tests whether {@link SpanningRecordSerializer} and {@link AdaptiveSpanningRecordDeserializer}
* interact as expected.
* <p>
* Only a single {@link MemorySegment} will be allocated.
*
* @param records records to test
* @param segmentSize size for the {@link MemorySegment}
*/
private void test (Util.MockRecords records, int segmentSize) throws Exception {
final int SERIALIZATION_OVERHEAD = 4; // length encoding
final RecordSerializer<SerializationTestType> serializer = new SpanningRecordSerializer<SerializationTestType>();
final RecordDeserializer<SerializationTestType> deserializer = new AdaptiveSpanningRecordDeserializer<SerializationTestType>();
final Buffer buffer = new Buffer(new MemorySegment(new byte[segmentSize]), segmentSize, null);
final ArrayDeque<SerializationTestType> serializedRecords = new ArrayDeque<SerializationTestType>();
// -------------------------------------------------------------------------------------------------------------
serializer.setNextBuffer(buffer);
int numBytes = 0;
int numRecords = 0;
for (SerializationTestType record : records) {
serializedRecords.add(record);
numRecords++;
numBytes += record.length() + SERIALIZATION_OVERHEAD;
// serialize record
if (serializer.addRecord(record).isFullBuffer()) {
// buffer is full => start deserializing
deserializer.setNextMemorySegment(serializer.getCurrentBuffer().getMemorySegment(), segmentSize);
while (!serializedRecords.isEmpty()) {
SerializationTestType expected = serializedRecords.poll();
SerializationTestType actual = expected.getClass().newInstance();
if (deserializer.getNextRecord(actual).isFullRecord()) {
Assert.assertEquals(expected, actual);
numRecords--;
} else {
serializedRecords.addFirst(expected);
break;
}
}
while (serializer.setNextBuffer(buffer).isFullBuffer()) {
deserializer.setNextMemorySegment(serializer.getCurrentBuffer().getMemorySegment(), segmentSize);
}
}
}
// deserialize left over records
deserializer.setNextMemorySegment(serializer.getCurrentBuffer().getMemorySegment(), (numBytes % segmentSize));
serializer.clear();
while (!serializedRecords.isEmpty()) {
SerializationTestType expected = serializedRecords.poll();
SerializationTestType actual = expected.getClass().newInstance();
DeserializationResult result = deserializer.getNextRecord(actual);
Assert.assertTrue(result.isFullRecord());
Assert.assertEquals(expected, actual);
numRecords--;
}
// assert that all records have been serialized and deserialized
Assert.assertEquals(0, numRecords);
Assert.assertFalse(serializer.hasData());
Assert.assertFalse(deserializer.hasUnfinishedData());
}
}