Method getNewGeneration

fdbserver/ConfigNode.actor.cpp:229–241

	// New transactions increment the database's current live version. This effectively serves as a lock, providing
	// serializability
	ACTOR static Future<Void> getNewGeneration(ConfigNodeImpl* self, ConfigTransactionGetGenerationRequest req) {
		state ConfigGeneration generation = wait(getGeneration(self));
		++generation.liveVersion;
		if (req.lastSeenLiveVersion.present()) {
			CODE_PROBE(req.lastSeenLiveVersion.get() >= generation.liveVersion,
			           "Node is lagging behind some other node");
			generation.liveVersion = std::max(generation.liveVersion, req.lastSeenLiveVersion.get() + 1);
		}
		self->kvStore->set(KeyValueRef(currentGenerationKey, BinaryWriter::toValue(generation, IncludeVersion())));
		wait(self->kvStore->commit());
		req.reply.send(ConfigTransactionGetGenerationReply{ generation });
		return Void();
	}

	ACTOR static Future<Void> get(ConfigNodeImpl* self, ConfigTransactionGetRequest req) {
		ConfigGeneration currentGeneration = wait(getGeneration(self));