TestWritableSerialization.java
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上传日期:2018-01-08
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文件大小:3k
源码类别:
网格计算
开发平台:
Java
- /**
- * 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.hadoop.io.serializer;
- import static org.apache.hadoop.io.TestGenericWritable.CONF_TEST_KEY;
- import static org.apache.hadoop.io.TestGenericWritable.CONF_TEST_VALUE;
- import junit.framework.TestCase;
- import org.apache.hadoop.conf.Configuration;
- import org.apache.hadoop.io.DataInputBuffer;
- import org.apache.hadoop.io.DataOutputBuffer;
- import org.apache.hadoop.io.Text;
- import org.apache.hadoop.io.TestGenericWritable.Baz;
- import org.apache.hadoop.io.TestGenericWritable.FooGenericWritable;
- import org.apache.hadoop.util.GenericsUtil;
- public class TestWritableSerialization extends TestCase {
- private static final Configuration conf = new Configuration();
- static {
- conf.set("io.serializations"
- , "org.apache.hadoop.io.serializer.WritableSerialization");
- }
- public void testWritableSerialization() throws Exception {
- Text before = new Text("test writable");
- testSerialization(conf, before);
- }
- public void testWritableConfigurable() throws Exception {
- //set the configuration parameter
- conf.set(CONF_TEST_KEY, CONF_TEST_VALUE);
- //reuse TestGenericWritable inner classes to test
- //writables that also implement Configurable.
- FooGenericWritable generic = new FooGenericWritable();
- generic.setConf(conf);
- Baz baz = new Baz();
- generic.set(baz);
- Baz result = testSerialization(conf, baz);
- assertNotNull(result.getConf());
- }
- /**
- * A utility that tests serialization/deserialization.
- * @param <K> the class of the item
- * @param conf configuration to use, "io.serializations" is read to
- * determine the serialization
- * @param before item to (de)serialize
- * @return deserialized item
- */
- public static<K> K testSerialization(Configuration conf, K before)
- throws Exception {
- SerializationFactory factory = new SerializationFactory(conf);
- Serializer<K> serializer
- = factory.getSerializer(GenericsUtil.getClass(before));
- Deserializer<K> deserializer
- = factory.getDeserializer(GenericsUtil.getClass(before));
- DataOutputBuffer out = new DataOutputBuffer();
- serializer.open(out);
- serializer.serialize(before);
- serializer.close();
- DataInputBuffer in = new DataInputBuffer();
- in.reset(out.getData(), out.getLength());
- deserializer.open(in);
- K after = deserializer.deserialize(null);
- deserializer.close();
- assertEquals(before, after);
- return after;
- }
- }