open-consul/ui/packages/consul-ui/vendor/metrics-providers/consul.js

52 lines
1.4 KiB
JavaScript

(
function(global) {
// Current interface is these three methods.
const requiredMethods = [
'init',
'serviceRecentSummarySeries',
'serviceRecentSummaryStats',
'upstreamRecentSummaryStats',
'downstreamRecentSummaryStats',
];
// This is a bit gross but we want to support simple extensibility by
// including JS in the browser without forcing operators to setup a whole
// transpiling stack. So for now we use a window global as a thin registry for
// these providers.
class Consul {
constructor() {
this.registry = {};
this.providers = {};
}
registerMetricsProvider(name, provider) {
// Basic check that it matches the type we expect
for (var m of requiredMethods) {
if (typeof provider[m] !== 'function') {
throw new Error(`Can't register metrics provider '${name}': missing ${m} method.`);
}
}
this.registry[name] = provider;
}
getMetricsProvider(name, options) {
if (!(name in this.registry)) {
throw new Error(`Metrics Provider '${name}' is not registered.`);
}
if (name in this.providers) {
return this.providers[name];
}
this.providers[name] = Object.create(this.registry[name]);
this.providers[name].init(options);
return this.providers[name];
}
}
global.consul = new Consul();
}
)(window);