return (source) => source.pipe(operators_1.retryWhen(e => e.pipe(operators_1.scan((errorCount, error) => {
common_1.Logger.error(`Unable to connect to the database. Retrying (${errorCount +
1})...`, error.stack, 'TypeOrmModule');
if (errorCount + 1 >= retryAttempts) {
throw error;
}
return errorCount + 1;
}, 0), operators_1.delay(retryDelay))));
subscribe() {
const mesos$ = container.get(MesosStreamType);
const masterRequest$ = container.get(MesosMasterRequestType).pipe(
tap(response => {
const master = mesosStreamParsers.getMaster(
this.getMaster(),
JSON.parse(response)
);
CompositeState.addState(master);
this.setMaster(master);
})
);
const parsers = pipe(...Object.values(mesosStreamParsers));
const data$ = mesos$.pipe(
merge(masterRequest$),
distinctUntilChanged(),
map(message => parsers(this.getLastMesosState(), JSON.parse(message))),
tap(state => this.setState(state), console.error)
);
const wait$ = masterRequest$.pipe(zip(mesos$.pipe(take(1))));
const eventTrigger$ = data$.pipe(
merge(
// A lot of DCOS UI rely on the MesosStateStore emitting
// MESOS_STATE_CHANGE events. After the switch to the stream, we lost this
// event. To avoid a deeper refactor, we introduced this fake emitter.
//
// TODO: https://jira.mesosphere.com/browse/DCOS-18277
interval(Config.getRefreshRate())
)
);
// Since we introduced the fake event above, we have to guarantee certain
// refresh limits to the UI. They are:
//
// MOST once every (Config.getRefreshRate() * 0.5) ms. due to sampleTime.
// LEAST once every tick of Config.getRefreshRate() ms in
// Observable.interval
//
// TODO: https://jira.mesosphere.com/browse/DCOS-18277
this.stream = wait$
.pipe(
concat(eventTrigger$),
sampleTime(Config.getRefreshRate() * 0.5),
retryWhen(linearBackoff(RETRY_DELAY, -1, MAX_RETRY_DELAY))
)
.subscribe(
() => Promise.resolve().then(this.onStreamData),
this.onStreamError
);
}