Hi All, I have been working on an implementation for internode compression (CASSANDRA-3127.) https://issues.apache.org/jira/browse/CASSANDRA-3127
I have written code that "works," but I'm looking for some advice on how to write unit tests for it. At the moment it compresses where: interrnode_message_compression_threshold > 0 means it compress messages larger than it compresses all messags if it is == 0 and compresses none if less than 0 The code itself has been tested in an environment outside of cassandra (i.e. a few mock classes, and a heavily modified OutboundTcpConnection and IncomingTcpConnection.) and inside of Cassandra all of the current unit tests are passing. Since I can't inject a mocked MessagingService into IncomingTcpConnection, I'm guessing I have to do the testing from the outside of MessagingService, but the MessagingService itself checks to see if you are sending messages to yourself, and doesn't put them over the connection. Are there any tricks to letting me mock different endpoints from within a unit test? Can this only be tested in a distributed fashion at the OS level? Also the internode_message_compression_threshold is set through the cassandra.yaml file--is it possible to set these properties at runtime? Can I just change the public entry for it in the static Config class directly, or will that break other things? Thanks for you help and time, Zach
