/***********************************************************************************************************************
* 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.RecordSerializer.SerializationResult;
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.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.Random;
public class SpanningRecordSerializerTest {
@Test
public void testHasData() {
final int SEGMENT_SIZE = 16;
final SpanningRecordSerializer<SerializationTestType> serializer = new SpanningRecordSerializer<SerializationTestType>();
final Buffer buffer = new Buffer(new MemorySegment(new byte[SEGMENT_SIZE]), SEGMENT_SIZE, null);
final SerializationTestType randomIntRecord = Util.randomRecord(SerializationTestTypeFactory.INT);
Assert.assertFalse(serializer.hasData());
try {
serializer.addRecord(randomIntRecord);
Assert.assertTrue(serializer.hasData());
serializer.setNextBuffer(buffer);
Assert.assertTrue(serializer.hasData());
serializer.clear();
Assert.assertFalse(serializer.hasData());
serializer.setNextBuffer(buffer);
serializer.addRecord(randomIntRecord);
Assert.assertTrue(serializer.hasData());
serializer.addRecord(randomIntRecord);
Assert.assertTrue(serializer.hasData());
} catch (IOException e) {
e.printStackTrace();
}
}
@Test
public void testEmptyRecords() {
final int SEGMENT_SIZE = 11;
final SpanningRecordSerializer<SerializationTestType> serializer = new SpanningRecordSerializer<SerializationTestType>();
final Buffer buffer = new Buffer(new MemorySegment(new byte[SEGMENT_SIZE]), SEGMENT_SIZE, null);
try {
Assert.assertEquals(SerializationResult.FULL_RECORD, serializer.setNextBuffer(buffer));
} catch (IOException e) {
e.printStackTrace();
}
try {
SerializationTestType emptyRecord = new SerializationTestType() {
@Override
public SerializationTestType getRandom(Random rnd) {
throw new UnsupportedOperationException();
}
@Override
public int length() {
throw new UnsupportedOperationException();
}
@Override
public void write(DataOutput out) throws IOException {
}
@Override
public void read(DataInput in) throws IOException {
}
@Override
public int hashCode() {
throw new UnsupportedOperationException();
}
@Override
public boolean equals(Object obj) {
throw new UnsupportedOperationException();
}
};
SerializationResult result = serializer.addRecord(emptyRecord);
Assert.assertEquals(SerializationResult.FULL_RECORD, result);
result = serializer.addRecord(emptyRecord);
Assert.assertEquals(SerializationResult.FULL_RECORD, result);
result = serializer.addRecord(emptyRecord);
Assert.assertEquals(SerializationResult.PARTIAL_RECORD_MEMORY_SEGMENT_FULL, result);
result = serializer.setNextBuffer(buffer);
Assert.assertEquals(SerializationResult.FULL_RECORD, result);
} catch (IOException e) {
e.printStackTrace();
}
}
@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 testIntRecordsWithAlignedSegments() {
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 testIntRecordsWithUnalignedSegments() {
final int SEGMENT_SIZE = 31;
final int NUM_VALUES = 248; // least common multiple => last record should align
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 = 100000;
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 the {@link SpanningRecordSerializer} returns the expected
* {@link SerializationResult} values.
* <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 SpanningRecordSerializer<SerializationTestType> serializer = new SpanningRecordSerializer<SerializationTestType>();
final Buffer buffer = new Buffer(new MemorySegment(new byte[segmentSize]), segmentSize, null);
// -------------------------------------------------------------------------------------------------------------
serializer.setNextBuffer(buffer);
int numBytes = 0;
for (SerializationTestType record : records) {
SerializationResult result = serializer.addRecord(record);
numBytes += record.length() + SERIALIZATION_OVERHEAD;
if (numBytes < segmentSize) {
Assert.assertEquals(SerializationResult.FULL_RECORD, result);
} else if (numBytes == segmentSize) {
Assert.assertEquals(SerializationResult.FULL_RECORD_MEMORY_SEGMENT_FULL, result);
serializer.setNextBuffer(buffer);
numBytes = 0;
} else {
Assert.assertEquals(SerializationResult.PARTIAL_RECORD_MEMORY_SEGMENT_FULL, result);
while (result.isFullBuffer()) {
numBytes -= segmentSize;
result = serializer.setNextBuffer(buffer);
}
}
}
}
}