/*
* Copyright 2012 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:
*
* 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 io.netty.handler.codec.sctp;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.MessageBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelOutboundByteHandlerAdapter;
import io.netty.channel.ChannelPromise;
import io.netty.channel.sctp.SctpMessage;
import io.netty.handler.codec.EncoderException;
/**
* A ChannelHandler which transform {@link ByteBuf} to {@link SctpMessage} and send it through a specific stream
* with given protocol identifier.
*
*/
public class SctpOutboundByteStreamHandler extends ChannelOutboundByteHandlerAdapter {
private final int streamIdentifier;
private final int protocolIdentifier;
/**
* @param streamIdentifier stream number, this should be >=0 or <= max stream number of the association.
* @param protocolIdentifier supported application protocol id.
*/
public SctpOutboundByteStreamHandler(int streamIdentifier, int protocolIdentifier) {
this.streamIdentifier = streamIdentifier;
this.protocolIdentifier = protocolIdentifier;
}
@Override
protected void flush(ChannelHandlerContext ctx, ByteBuf in, ChannelPromise promise) throws Exception {
try {
MessageBuf<Object> out = ctx.nextOutboundMessageBuffer();
ByteBuf payload = Unpooled.buffer(in.readableBytes());
payload.writeBytes(in);
out.add(new SctpMessage(streamIdentifier, protocolIdentifier, payload));
} catch (Throwable t) {
ctx.fireExceptionCaught(new EncoderException(t));
}
ctx.flush(promise);
}
}