| /* |
| * 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.beam.sdk.io.amqp; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.nio.BufferOverflowException; |
| import org.apache.beam.sdk.coders.CoderException; |
| import org.apache.beam.sdk.coders.CustomCoder; |
| import org.apache.beam.sdk.util.VarInt; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.io.ByteStreams; |
| import org.apache.qpid.proton.message.Message; |
| |
| /** A coder for AMQP message. */ |
| public class AmqpMessageCoder extends CustomCoder<Message> { |
| |
| private static final int[] MESSAGE_SIZES = |
| new int[] {8 * 1024, 64 * 1024, 1 * 1024 * 1024, 64 * 1024 * 1024}; |
| |
| static AmqpMessageCoder of() { |
| return new AmqpMessageCoder(); |
| } |
| |
| @Override |
| public void encode(Message value, OutputStream outStream) throws CoderException, IOException { |
| for (int maxMessageSize : MESSAGE_SIZES) { |
| try { |
| encode(value, outStream, maxMessageSize); |
| return; |
| } catch (Exception e) { |
| continue; |
| } |
| } |
| throw new CoderException("Message is larger than the max size supported by the coder"); |
| } |
| |
| private void encode(Message value, OutputStream outStream, int messageSize) |
| throws IOException, BufferOverflowException { |
| byte[] data = new byte[messageSize]; |
| int bytesWritten = value.encode(data, 0, data.length); |
| VarInt.encode(bytesWritten, outStream); |
| outStream.write(data, 0, bytesWritten); |
| } |
| |
| @Override |
| public Message decode(InputStream inStream) throws CoderException, IOException { |
| Message message = Message.Factory.create(); |
| int bytesToRead = VarInt.decodeInt(inStream); |
| byte[] encodedMessage = new byte[bytesToRead]; |
| ByteStreams.readFully(inStream, encodedMessage); |
| message.decode(encodedMessage, 0, encodedMessage.length); |
| return message; |
| } |
| } |