| /* |
| * 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.giraph.comm.requests; |
| |
| import org.apache.giraph.utils.UnsafeByteArrayInputStream; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.DataInput; |
| import java.io.DataInputStream; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| /** |
| * Abstract request which has a byte array as its data |
| */ |
| public abstract class ByteArrayRequest extends WritableRequest { |
| /** Request data */ |
| private byte[] data; |
| |
| /** |
| * Constructor |
| * |
| * @param data Request data |
| */ |
| ByteArrayRequest(byte[] data) { |
| this.data = data; |
| } |
| |
| /** |
| * Constructor used for reflection only |
| */ |
| ByteArrayRequest() { |
| } |
| |
| /** |
| * Get request data |
| * |
| * @return Request data |
| */ |
| public byte[] getData() { |
| return data; |
| } |
| |
| /** |
| * Get request data in the form of {@link DataInput} |
| * |
| * @return Request data as {@link DataInput} |
| */ |
| public DataInput getDataInput() { |
| return new DataInputStream(new ByteArrayInputStream(data)); |
| } |
| |
| /** |
| * Wraps the byte array with UnsafeByteArrayInputStream stream. |
| * @return UnsafeByteArrayInputStream |
| */ |
| public UnsafeByteArrayInputStream getUnsafeByteArrayInput() { |
| return new UnsafeByteArrayInputStream(data); |
| } |
| |
| @Override |
| void readFieldsRequest(DataInput input) throws IOException { |
| int dataLength = input.readInt(); |
| data = new byte[dataLength]; |
| input.readFully(data); |
| } |
| |
| @Override |
| void writeRequest(DataOutput output) throws IOException { |
| output.writeInt(data.length); |
| output.write(data); |
| } |
| |
| @Override |
| public int getSerializedSize() { |
| // 4 for the length of data, plus number of data bytes |
| return super.getSerializedSize() + 4 + data.length; |
| } |
| } |