/** * 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.tez.runtime.library.common.shuffle.impl; import java.io.DataOutputStream; import java.io.IOException; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.hadoop.classification.InterfaceAudience; import org.apache.hadoop.classification.InterfaceStability; import org.apache.hadoop.io.BoundedByteArrayOutputStream; import org.apache.hadoop.io.WritableUtils; import org.apache.tez.runtime.library.common.sort.impl.IFile; import org.apache.tez.runtime.library.common.sort.impl.IFileOutputStream; import org.apache.tez.runtime.library.common.sort.impl.IFile.Writer; import static org.apache.tez.runtime.library.common.sort.impl.IFile.*; @InterfaceAudience.Private @InterfaceStability.Unstable public class InMemoryWriter extends Writer { private static final Log LOG = LogFactory.getLog(InMemoryWriter.class); // TODO Verify and fix counters if required. public InMemoryWriter(BoundedByteArrayOutputStream arrayStream) { super(null, null); this.out = new DataOutputStream(new IFileOutputStream(arrayStream)); } public void append(Object key, Object value) throws IOException { throw new UnsupportedOperationException ("InMemoryWriter.append(K key, V value"); } public void close() throws IOException { // Write EOF_MARKER for key/value length WritableUtils.writeVInt(out, IFile.EOF_MARKER); WritableUtils.writeVInt(out, IFile.EOF_MARKER); // Close the stream out.close(); out = null; } }