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https://issues.apache.org/jira/browse/KAFKA-97?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jun Rao closed KAFKA-97.
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> SocketServer.scala refers to Handler-specific variables
> -------------------------------------------------------
>
> Key: KAFKA-97
> URL: https://issues.apache.org/jira/browse/KAFKA-97
> Project: Kafka
> Issue Type: Bug
> Reporter: Jay Kreps
> Assignee: Jun Rao
> Priority: Minor
> Fix For: 0.8
>
>
> There is meant to be a separation between the socket server and the kafka
> server. The socket server doesn't know anything about kafka, it is a set of
> classes that take a request handler implementation, reads requests and writes
> responses. It is like a 300 line version of netty. Some logging slipped in
> that is specific to the KafkaHandler implementation. This is a violation of
> concerns and should be fixed, it is kind of like the map/reduce framework
> referencing stuff in a particular map/reduce job. If we want to refactor the
> handlers to better be able to give the name to a particular request that is
> good, but nothing in kafka.network should depend on anything but kafka.utils.
> Having worked on projects where we screwed this up i am a little
> sensitive--the network stuff is complex enough even if we don't mix it in
> with kafka logic, we want it to be testable on its own.
> Here is the code (beginning on SocketServer.scala, line 267):
> if(requestLogger.isTraceEnabled) {
> requestTypeId match {
> case RequestKeys.Produce =>
> requestLogger.trace("Handling produce request from " +
> channelFor(key).socket.getRemoteSocketAddress())
> case RequestKeys.Fetch =>
> requestLogger.trace("Handling fetch request from " +
> channelFor(key).socket.getRemoteSocketAddress())
> case RequestKeys.MultiFetch =>
> requestLogger.trace("Handling multi-fetch request from " +
> channelFor(key).socket.getRemoteSocketAddress())
> case RequestKeys.MultiProduce =>
> requestLogger.trace("Handling multi-produce request from " +
> channelFor(key).socket.getRemoteSocketAddress())
> case RequestKeys.Offsets =>
> requestLogger.trace("Handling offset request from " +
> channelFor(key).socket.getRemoteSocketAddress())
> case _ => throw new InvalidRequestException("No mapping found for
> handler id " + requestTypeId)
> }
> }
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