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/*
* Copyright 2016 The Netty Project
*
* The Netty Project 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:
*
* https://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.arangodb.shaded.netty.handler.codec;
import com.arangodb.shaded.netty.buffer.ByteBuf;
import com.arangodb.shaded.netty.channel.AddressedEnvelope;
import com.arangodb.shaded.netty.channel.ChannelHandlerContext;
import com.arangodb.shaded.netty.channel.ChannelPipeline;
import com.arangodb.shaded.netty.channel.ChannelPromise;
import com.arangodb.shaded.netty.channel.socket.DatagramPacket;
import com.arangodb.shaded.netty.handler.codec.protobuf.ProtobufEncoder;
import com.arangodb.shaded.netty.util.internal.StringUtil;
import static com.arangodb.shaded.netty.util.internal.ObjectUtil.checkNotNull;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.util.List;
/**
* An encoder that encodes the content in {@link AddressedEnvelope} to {@link DatagramPacket} using
* the specified message encoder. E.g.,
*
*
*
* Note: As UDP packets are out-of-order, you should make sure the encoded message size are not greater than
* the max safe packet size in your particular network path which guarantees no packet fragmentation.
*
* @param the type of message to be encoded
*/
public class DatagramPacketEncoder extends MessageToMessageEncoder> {
private final MessageToMessageEncoder encoder;
/**
* Create an encoder that encodes the content in {@link AddressedEnvelope} to {@link DatagramPacket} using
* the specified message encoder.
*
* @param encoder the specified message encoder
*/
public DatagramPacketEncoder(MessageToMessageEncoder encoder) {
this.encoder = checkNotNull(encoder, "encoder");
}
@Override
public boolean acceptOutboundMessage(Object msg) throws Exception {
if (super.acceptOutboundMessage(msg)) {
@SuppressWarnings("rawtypes")
AddressedEnvelope envelope = (AddressedEnvelope) msg;
return encoder.acceptOutboundMessage(envelope.content())
&& (envelope.sender() instanceof InetSocketAddress || envelope.sender() == null)
&& envelope.recipient() instanceof InetSocketAddress;
}
return false;
}
@Override
protected void encode(
ChannelHandlerContext ctx, AddressedEnvelope msg, List