Prior to this change, in the send function, the packet is forced to
use emqx:serialize to serialize packet, it is a wrong design because
other plugins which need to transform the mqtt packet to other packets
can not use their own serialize function to serialize packet.
This change solve the problem issued above.
Prior to this change, when the plugin like emqx_sn_gateway which has
no zone run the init_proc_mng_policy function, it would trigger error
and application crash.
This change add a case to avoid crash.
Prior to this change, Prior to this change, the validation for the mqtt5.0 publish packet
which both contains zero-length topic name and topic alias is wrong.
Prior to this change, if a producer session produces to two
or more shared subscriber groups, the previously picked subscriber
for sticky strategy may not be a valid member for the next group.
This is done by moving coveralls send to after_success section
in .travis.yml.
having it in after_success should not make the build fail if
coveralls send fails due to server being overloaded etc.
Before this change, eqmx_mock_client uses a shared ets table
to store last received message, this causes troulbe when we
want to start / stop two or more clients in one test case
the ets table gets owned by the first spanwed client and
gets closed when the owner client dies.
Now it keeps the last received message in process state
and a gen_server call is added to retrieve it for verification
Along with this change in emqx_mock_client, it made possible
to write test case to verify the actual subscriber pid
used in shared subscription strategy, so test cases were
added (and modified) to verify different strategies
The hibernation behaviour is also changed (implicitly) in this commit:
Prior to this change, connection/session always hibernates after
the stats timer expires regardless of messages in mailbox.
After this commit, connection/session process only goes to hibernate
when the timer expires AND there is nothing left in the mailbox to
process
