send_message() and send_message_oneway() are almost identical, implement
the later in terms of the former. The patch also fixes send_message() to
work properly with MsgIn = void.
Reviewed-by: Asias He <asias@cloudius-systems.com>
With the next patch "gossip: Add storage_service_value_factory helper"
in this series.
[asias@hjpc urchin]$ ninja-build
[8/10] LINK build/release/seastar
build/release/gms/gossiper.o: In function
`gms::versioned_value::versioned_value_factory::removing_nonlocal(utils::UUID
const&)':
/home/asias/src/cloudius-systems/urchin/./gms/versioned_value.hh:201:
undefined reference to `gms::versioned_value::DELIMITER_STR'
build/release/gms/gossiper.o: In function
`gms::versioned_value::versioned_value_factory::removal_coordinator(utils::UUID
const&)':
/home/asias/src/cloudius-systems/urchin/./gms/versioned_value.hh:211:
undefined reference to `gms::versioned_value::DELIMITER_STR'
build/release/gms/gossiper.o: In function
`gms::versioned_value::versioned_value_factory::removed_nonlocal(utils::UUID
const&, long)':
/home/asias/src/cloudius-systems/urchin/./gms/versioned_value.hh:206:
undefined reference to `gms::versioned_value::DELIMITER_STR'
/home/asias/src/cloudius-systems/urchin/./gms/versioned_value.hh:206:
undefined reference to `gms::versioned_value::DELIMITER_STR'
collect2: error: ld returned 1 exit status
Fix by defining the symbol in gms/versioned_value.cc.
There is one gossiper instance per node and it runs on cpu0 only. We can
not guarantee there will always be a core to core tcp connection within
messaging service, so messaging service needs to listen on all cpus.
When a remote node connects to local node with a connection bound to cpu
other than cpu0, we need to forward this message to cpu0.
Some subscribers are allocated statically, so it is a churn to make
shared pointers from them. And since registered subscribers have to be
unregister before been destroyed anyway there is no lifetime issue here
that require use of a smart pointer.
Register the handler of gossip verbs using ms::register_handler.
Implement send_gossip using ms::send_message. The handlers are only
placeholders for now. Will implement them later.
A periodic timer (1 seconds) is added to send gossip message
periodically.
This makes it possible to call get_local_failure_detector() in gossiper.
Otherwise there is a cyclic dependency between gms/gossiper.hh and
gms/failure_detector.hh
