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import Vue from 'vue';
import VueResource from 'vue-resource';
import statusCodes from '../../lib/utils/http_status';
import { backOff } from '../../lib/utils/common_utils';
Vue.use(VueResource);
const MAX_REQUESTS = 3;
function backOffRequest(makeRequestCallback) {
let requestCounter = 0;
return backOff((next, stop) => {
makeRequestCallback().then((resp) => {
if (resp.status === statusCodes.NO_CONTENT) {
requestCounter += 1;
if (requestCounter < MAX_REQUESTS) {
next();
} else {
stop(new Error('Failed to connect to the prometheus server'));
}
} else {
stop(resp);
}
}).catch(stop);
});
}
export default class MonitoringService {
constructor({ metricsEndpoint, deploymentEndpoint }) {
this.metricsEndpoint = metricsEndpoint;
this.deploymentEndpoint = deploymentEndpoint;
}
getGraphsData() {
return backOffRequest(() => Vue.http.get(this.metricsEndpoint))
.then(resp => resp.json())
.then((response) => {
if (!response || !response.data) {
throw new Error('Unexpected metrics data response from prometheus endpoint');
}
return response.data;
});
}
getDeploymentData() {
return backOffRequest(() => Vue.http.get(this.deploymentEndpoint))
.then(resp => resp.json())
.then((response) => {
if (!response || !response.deployments) {
throw new Error('Unexpected deployment data response from prometheus endpoint');
}
return response.deployments;
});
}
}
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