With regards to rolling restarts work in Galaxy, and is there any way of:
- knowing when one is about to start (so i can choose not to start meteor methods that mutate state)
- signalling when it is ok to take down the server (e.g.: through some “ok to shutdown” flag that I can toggle)
If not, that would be a very useful addition. MDG might bundle Galaxy specific functionality into a galaxy package.
I’m thinking of something like the following (and postulating an export called MeteorGalaxy):
var numActiveMethods = 0;
function methodStarted() {
numActiveMethods += 1;
// running method... please don't shutdown yet
MeteorGalaxy.canShutdown = false;
}
function methodEnded() {
numActiveMethods -= 1;
if (numActiveMethods === 0) {
// no "active methods", ready for shutdown
MeteorGalaxy.canShutdown = true;
}
}
Meteor.methods({
'some-method': function someMethod(arg1, arg2, arg3) {
if (MeteorGalaxy.shutdownImminent) {
throw new Meteor.Error('shutdown-imminent');
// ... or queue for action after restart and notify the client of how.........
}
methodStarted();
// lots of code with yielding and all that
methodEnded();
}
});