Created
September 1, 2011 11:43
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Memcache Codec with Quit Support
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| import com.twitter.finagle.{Codec, Service} | |
| import com.twitter.finagle.memcached.protocol.{Command, Response, Quit => MemcacheQuit, NoOp} | |
| import com.twitter.finagle.memcached.protocol.text.{Encoder, Memcached, ResponseToEncoding} | |
| import com.twitter.finagle.memcached.protocol.text.server.{Decoder => ServerDecoder, DecodingToCommand} | |
| import com.twitter.logging.Logger | |
| import com.twitter.util.Future | |
| import org.jboss.netty.buffer.{ChannelBuffer, ChannelBuffers} | |
| import org.jboss.netty.channel._ | |
| import org.jboss.netty.util.CharsetUtil | |
| // Simple ChannelHandler that deals with the protocol specified quit message | |
| class MemcacheChannelHandler extends SimpleChannelHandler { | |
| override def messageReceived(ctx: ChannelHandlerContext, e: MessageEvent) { | |
| e.getMessage() match { | |
| case MemcacheQuit() => | |
| ctx.getChannel().close() | |
| case _ => super.messageReceived(ctx, e) | |
| } | |
| } | |
| } | |
| class MemcachedQuitCodec extends Memcached { | |
| implicit def str2cb(str: String): ChannelBuffer = ChannelBuffers.copiedBuffer(str, CharsetUtil.UTF_8) | |
| private[this] val storageCommands = collection.Set[ChannelBuffer]( | |
| "set", "add", "replace", "append", "prepend") | |
| override def server = Function.const { | |
| new Codec[Command, Response] { | |
| def pipelineFactory = new ChannelPipelineFactory { | |
| def getPipeline() = { | |
| val pipeline = Channels.pipeline() | |
| pipeline.addLast("decoder", new ServerDecoder(storageCommands)) | |
| pipeline.addLast("decoding2command", new DecodingToCommand) | |
| // NOTE This is the only change to the parent class | |
| pipeline.addLast("handleQuitCommand", new MemcacheChannelHandler) | |
| pipeline.addLast("encoder", new Encoder) | |
| pipeline.addLast("response2encoding", new ResponseToEncoding) | |
| pipeline | |
| } | |
| } | |
| } // new Codec | |
| } // server | |
| } // class |
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