[infinispan-dev] Remoting package refactor

Hello, As many of you should know, I'm refactoring the remoting package. I was trying and testing what can be done and it's time for an update. Finally, I got a working version (needs some cleanups) that can be found here [1]. The goal is to reduce the complexity from CommandAwareRpcDispatcher and InboundInvocationHandler. This classes are getting full of "if command is type T, then do this" and it will get worse when ISPN-2849 [2] and ISPN-4610 [3] is done. Also, it decouples the Transport from the processing remote commands logic. The main idea is to have one global inbound invocations handler and a per cache inbound invocations handler. The first one will handle the non-cache rpc commands and the later the cache rpc commands. Since each cache has a different configuration, multiple per cache inbound invocation handlers will be implemented. Currently, I have the non-total order and a total order implementation. After ISPN-2849 and ISPN-4610, I'll probably add more, for example: TO tx and TO non-tx, pessimistic, optimistic and default non-tx implementations. change details: * remove total order remote executor service. The remote executor service can be used and it has exactly the same goal. * added a single thread remote executor service. This will handle the FIFO deliver commands. Previously, they were handled by JGroups incoming threads and with a new executor service, each cache can process their own FIFO commands concurrently. * currently the non-blocking cache rpc commands are processed directly in JGroups threads. Not sure if it is ok, but I think we can add another remote executor service for these commands. The advantage is that the JGroups threads no longer will execute remote commands. * the Transport is decoupled. May be useful for the test suite. * possibly remove the TotalOrder*Command (TotalOrderPrepareCommand and similar) (needs to double check). Since we have a total order inbound invocation handler for total order transactions, it is not necessary a special command to identify when the transaction is in total order or not. Comments, ideas, feedback are welcome. Cheers, Pedro [1] https://github.com/pruivo/infinispan/compare/remoting_refactor [2] https://issues.jboss.org/browse/ISPN-2849 => don't keep thread blocked waiting for locks [3] https://issues.jboss.org/browse/ISPN-4610 => non transactional total order