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package org.apache.james.protocols.impl;
import org.apache.james.protocols.api.LineHandler;
import org.apache.james.protocols.api.ProtocolSession;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.channel.ChannelUpstreamHandler;
import org.jboss.netty.channel.MessageEvent;
import org.jboss.netty.channel.SimpleChannelUpstreamHandler;
/**
* {@link ChannelUpstreamHandler} implementation which will call a given {@link LineHandler} implementation
*
* @param <Session>
*/
public class LineHandlerUpstreamHandler<Session extends ProtocolSession> extends SimpleChannelUpstreamHandler implements ChannelAttributeSupport{
private LineHandler<Session> handler;
public LineHandlerUpstreamHandler(LineHandler<Session> handler) {
this.handler = handler;
}
@SuppressWarnings("unchecked")
@Override
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
Session pSession = (Session) attributes.get(ctx.getChannel());
ChannelBuffer buf = (ChannelBuffer) e.getMessage();
byte[] line;
if (buf.hasArray()) {
line = buf.array();
} else {
// copy the ChannelBuffer to a byte array to process the LineHandler
line = new byte[buf.capacity()];
buf.getBytes(0, line);
}
boolean disconnect = handler.onLine(pSession, line);
if (disconnect) ctx.getChannel().disconnect();
}
}