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#include <erebos/sync.h>
#include <erebos/network.h>
using namespace erebos;
using std::scoped_lock;
static const UUID myUUID("a4f538d0-4e50-4082-8e10-7e3ec2af175d");
SyncService::SyncService() = default;
SyncService::~SyncService() = default;
UUID SyncService::uuid() const
{
return myUUID;
}
void SyncService::handle(Context & ctx)
{
auto pid = ctx.peer().identity();
if (!pid)
return;
const auto & powner = pid->finalOwner();
const auto & owner = ctx.peer().server().identity().finalOwner();
if (!powner.sameAs(owner))
return;
ctx.local(
ctx.local()->sharedRefAdd(ctx.ref())
);
}
void SyncService::serverStarted(const Server & s)
{
server = &s;
server->peerList().onUpdate(std::bind(&SyncService::peerWatcher, this,
std::placeholders::_1, std::placeholders::_2));
watchedHead = server->localHead().watch(std::bind(&SyncService::localStateWatcher, this,
std::placeholders::_1));
}
void SyncService::peerWatcher(size_t, const Peer * peer)
{
if (peer && peer->identity()->finalOwner().sameAs(
server->identity().finalOwner())) {
scoped_lock lock(headMutex);
for (const auto & r : (*watchedHead)->sharedRefs())
peer->send(myUUID, r);
}
}
void SyncService::localStateWatcher(const Head<LocalState> & head)
{
scoped_lock lock(headMutex);
bool same = head->sharedRefs().size() ==
(*watchedHead)->sharedRefs().size();
if (same) {
for (size_t i = 0; i < head->sharedRefs().size(); i++)
if (head->sharedRefs()[i].digest() !=
(*watchedHead)->sharedRefs()[i].digest()) {
same = false;
break;
}
}
if (!same) {
*watchedHead = head;
const auto & plist = server->peerList();
for (size_t i = 0; i < plist.size(); i++)
for (const auto & r : (*watchedHead)->sharedRefs())
plist.at(i).send(myUUID, r);
}
}
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