all=org.apache.dubbo.remoting.transport.dispatcher.all.AllDispatcher
direct=org.apache.dubbo.remoting.transport.dispatcher.direct.DirectDispatcher
message=org.apache.dubbo.remoting.transport.dispatcher.message.MessageOnlyDispatcher
execution=org.apache.dubbo.remoting.transport.dispatcher.execution.ExecutionDispatcher
connection=org.apache.dubbo.remoting.transport.dispatcher.connection.ConnectionOrderedDispatcher