query_options is needlessy organized as a class hierarchy, even though it's
really a simple value type.
Fix by folding all the derived classes into it.
It is built on top of seastar rpc infrastructure. I've sorted out all
the message VERBs which Origin use. All of them can be implemented using
this messaging_service.
Each Verb contains a handler. There are two types of handlers, one
will return a message back to sender, the other will not. The former
can be registered using ms.register_handler(), the latter can be
registered using ms.register_handler_oneway().
Usage example:
To use messaging_service to send a message. All you need is:
messaging_service& ms = get_local_messaging_service();
1) To register a message hander:
ms.register_handler(messaging_verb::ECHO, [] (int x, long y) {
print("Server got echo msg = (%d, %ld) \n", x, y);
std::tuple<int, long> ret(x*x, y*y);
return make_ready_future<decltype(ret)>(std::move(ret));
});
ms.register_handler_oneway(messaging_verb::GOSSIP_SHUTDOWN, [] (empty_msg msg) {
print("Server got shutdown msg = %s\n", msg);
return messaging_service::no_wait();
});
2) To send a message:
using RetMsg = std::tuple<int, long>;
return ms.send_message<RetMsg>(messaging_verb::ECHO, id, msg1, msg2).then([] (RetMsg msg) {
print("Client sent echo got reply = (%d , %ld)\n", std::get<0>(msg), std::get<1>(msg));
return sleep(100ms).then([]{
return make_ready_future<>();
});
});
return ms.send_message_oneway<void>(messaging_verb::GOSSIP_SHUTDOWN, std::move(id), std::move(msg)).then([] () {
print("Client sent gossip_shutdown got reply = void\n");
return make_ready_future<>();
});
Tests:
send to cpu 0
$ ./message --server 127.0.0.1 --cpuid 0 --smp 2
send to cpu 1
$ ./message --server 127.0.0.1 --cpuid 1 --smp 2
All basic_sstring writes the same way. Using sstring as the signature would
require other users that are using other variants of basic_sstring to add their
own signatures.
This general version will cover those use cases as well.
Signed-off-by: Glauber Costa <glommer@cloudius-systems.com>
byteorder.hh's "net::packed<T>" subclassed the basic unaligned<T> and
added a "adjust_endianess" method. This was completely unnecessary:
While ntoh's generic implementation indeed uses that method, we also
have a specialized overload for ntoh(packed<T>), so the generic
implementation would never be used for packed<T> anyway!
So for net::packed<T> we don't need anything more than unaligned<T>,
and can just make it an alias.
As a bonus, the "hton" function will now work also on unaligned<T>
(such as the result of the convenient unaligned_cast<>), not just on
net::packed<T>.
Signed-off-by: Nadav Har'El <nyh@cloudius-systems.com>
To support HEAD version of DPDK, we need -mavx/-mavx2 on Seastar CFLAGS.
But we cannot enable it until Host CPU has the feature, so we need to check it.
Signed-off-by: Takuya ASADA <syuu@cloudius-systems.com>
To be more precise, do not take schema_ptr by value.
Fixes crashes in running smp > 1 where mutations applied across shards
(i.e. foreign memory) would cause schema_ptr:s to get out of sync (using
other shards ptr)
Latest DPDK(which will be v2.1.0) causes compile error when referencing RTE_MBUF_REFCNT because it defained as "#pragma GCC poison RTE_MBUF_REFCNT".
And that configuration entry is not available v2.0.0 or later.
Signed-off-by: Takuya ASADA <syuu@cloudius-systems.com>
This variant is intended to simplify do_for_each idiom where the
iterators begin() and end() will be implicit.
Allowing the user to do something as follow:
return do_for_each(map, [] { ... });
Signed-off-by: Raphael S. Carvalho <raphaelsc@cloudius-systems.com>
bytes and sstring are distinct types, since their internal buffers are of
different length, but bytes_view is an alias of sstring_view, which makes
it possible of objects of different types to leak across the abstraction
boundary.
Fix this by making bytes a basic_sstring<int8_t, ...> instead of using char.
int8_t is a 'signed char', which is a distinct type from char, so now
bytes_view is a distinct type from sstring_view.
uint8_t would have been an even better choice, but that diverges from Origin
and would have required an audit.
We need to update _pos after we read, or we keep reading the same
chunk over and over :-( Also, don't read anything if we're already past
the end of file.
Signed-off-by: Nadav Har'El <nyh@cloudius-systems.com>
