| /** |
| * 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.storm.pacemaker.codec; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import org.apache.storm.generated.HBMessage; |
| import org.apache.storm.generated.HBServerMessageType; |
| import org.apache.storm.messaging.netty.ControlMessage; |
| import org.apache.storm.messaging.netty.SaslMessageToken; |
| import org.apache.storm.shade.io.netty.buffer.ByteBuf; |
| import org.apache.storm.shade.io.netty.channel.ChannelHandlerContext; |
| import org.apache.storm.shade.io.netty.handler.codec.ByteToMessageDecoder; |
| import org.apache.storm.utils.Utils; |
| |
| public class ThriftDecoder extends ByteToMessageDecoder { |
| |
| private static final int INTEGER_SIZE = 4; |
| |
| /** |
| * The maximum length in bytes that a serialized thrift message is allowed to be. |
| */ |
| private final int maxLength; |
| |
| /** |
| * Instantiate a ThriftDecoder that accepts serialized messages of at most maxLength bytes. |
| */ |
| public ThriftDecoder(final int maxLengthBytes) { |
| maxLength = maxLengthBytes; |
| } |
| |
| @Override |
| protected void decode(ChannelHandlerContext channelHandlerContext, ByteBuf buf, List<Object> out) throws Exception { |
| long available = buf.readableBytes(); |
| if (available < INTEGER_SIZE) { |
| return; |
| } |
| |
| buf.markReaderIndex(); |
| |
| int thriftLen = buf.readInt(); |
| if (thriftLen < 0 || thriftLen > maxLength) { |
| throw new IOException("Thrift message of length " + Integer.toString(thriftLen) |
| + " is greater than allowed " + maxLength |
| + " or less than 0."); |
| } |
| |
| available -= INTEGER_SIZE; |
| |
| if (available < thriftLen) { |
| // We haven't received the entire object yet, return and wait for more bytes. |
| buf.resetReaderIndex(); |
| return; |
| } |
| |
| byte[] serialized = new byte[thriftLen]; |
| buf.readBytes(serialized, 0, thriftLen); |
| HBMessage m = (HBMessage) Utils.thriftDeserialize(HBMessage.class, serialized); |
| |
| if (m.get_type() == HBServerMessageType.CONTROL_MESSAGE) { |
| ControlMessage cm = ControlMessage.read(m.get_data().get_message_blob()); |
| out.add(cm); |
| } else if (m.get_type() == HBServerMessageType.SASL_MESSAGE_TOKEN) { |
| SaslMessageToken sm = SaslMessageToken.read(m.get_data().get_message_blob()); |
| out.add(sm); |
| } else { |
| out.add(m); |
| } |
| } |
| } |