com.streamsets.pipeline.lib.udp.UDPMessageDeserializer.java Source code

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Here is the source code for com.streamsets.pipeline.lib.udp.UDPMessageDeserializer.java

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/*
 * Copyright 2017 StreamSets Inc.
 *
 * Licensed 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 com.streamsets.pipeline.lib.udp;

import com.streamsets.pipeline.api.impl.Utils;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.socket.DatagramPacket;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.net.InetSocketAddress;

public class UDPMessageDeserializer {

    public UDPMessageDeserializer() {
    }

    public UDPMessage deserialize(byte[] buffer) throws IOException {
        ByteArrayInputStream bais = new ByteArrayInputStream(buffer);
        ObjectInputStream ois = new ObjectInputStream(bais);
        int version = ois.readInt();
        if (version == UDPConstants.UDP_MESSAGE_VERSION) {
            int type = ois.readInt();
            long received = ois.readLong();
            String address = ois.readUTF();
            int port = ois.readInt();
            InetSocketAddress sender = new InetSocketAddress(address, port);
            address = ois.readUTF();
            port = ois.readInt();
            InetSocketAddress receiver = new InetSocketAddress(address, port);
            int dataLen = ois.readInt();
            byte[] data = new byte[dataLen];
            ois.readFully(data);
            ois.close();
            ByteBuf byteBuf = Unpooled.wrappedBuffer(data);
            DatagramPacket datagram = new DatagramPacket(byteBuf, receiver, sender);
            return new UDPMessage(type, received, datagram);
        } else {
            throw new IOException(Utils.format("Unsupported version '{}'", version));
        }
    }

}