Watch-api streaming reworks (#1990)

* loading k8s resources into stores per selected namespaces -- part 1

Signed-off-by: Roman <ixrock@gmail.com>

* loading k8s resources into stores per selected namespaces -- part 2
- fix: generating helm chart id

Signed-off-by: Roman <ixrock@gmail.com>

* loading k8s resources into stores per selected namespaces -- part 3

Signed-off-by: Roman <ixrock@gmail.com>

* fixes

Signed-off-by: Roman <ixrock@gmail.com>

* fixes / responding to comments

Signed-off-by: Roman <ixrock@gmail.com>

* chore / small fixes

Signed-off-by: Roman <ixrock@gmail.com>

* Watch api does not work for non-admins with lots of namespaces #1898 -- part 1

Signed-off-by: Roman <ixrock@gmail.com>

* fixes & refactoring

Signed-off-by: Roman <ixrock@gmail.com>

* make lint happy

Signed-off-by: Roman <ixrock@gmail.com>

* reset store on loading error

Signed-off-by: Roman <ixrock@gmail.com>

* added new cluster method: cluster.isAllowedResource

Signed-off-by: Roman <ixrock@gmail.com>

* fix: loading namespaces optimizations

Signed-off-by: Roman <ixrock@gmail.com>

* fixes & refactoring

Signed-off-by: Roman <ixrock@gmail.com>

* fix: parse multiple kube-events from stream's chunk

Signed-off-by: Roman <ixrock@gmail.com>

* fix: mobx issue with accessing empty observable array by index (removes warning), use common logger

Signed-off-by: Roman <ixrock@gmail.com>

* fine-tuning

Signed-off-by: Roman <ixrock@gmail.com>

* fix: parse json stream chunks at client-side (might be partial, depends on network speed)

Signed-off-by: Roman <ixrock@gmail.com>

* store subscribing refactoring -- part 1

Signed-off-by: Roman <ixrock@gmail.com>

* store subscribing refactoring -- part 2

Signed-off-by: Roman <ixrock@gmail.com>

* store subscribing refactoring -- part 3

Signed-off-by: Roman <ixrock@gmail.com>

* store subscribing refactoring -- part 4

Signed-off-by: Roman <ixrock@gmail.com>

* auto-reconnect on online/offline status change, interval connection check

Signed-off-by: Roman <ixrock@gmail.com>

* check connection every 5m

Signed-off-by: Roman <ixrock@gmail.com>

* split concurrent watch-api requests by 10 at a time + 150ms delay before next call

Signed-off-by: Roman <ixrock@gmail.com>

* refactoring / clean up

Signed-off-by: Roman <ixrock@gmail.com>

* use `plimit` + delay for k8s watch requests

Signed-off-by: Roman <ixrock@gmail.com>

* lint fix

Signed-off-by: Roman <ixrock@gmail.com>

* added explicit `preload: true` when subscribing stores

Signed-off-by: Roman <ixrock@gmail.com>

* kubeWatchApi refactoring / fine-tuning

Signed-off-by: Roman <ixrock@gmail.com>

* clean up

Signed-off-by: Roman <ixrock@gmail.com>

src/renderer/components/+workloads-overview/overview.tsx

@@ -1,8 +1,7 @@
 import "./overview.scss";
 
 import React from "react";
-import { observable, when } from "mobx";
-import { observer } from "mobx-react";
+import { disposeOnUnmount, observer } from "mobx-react";
 import { OverviewStatuses } from "./overview-statuses";
 import { RouteComponentProps } from "react-router";
 import { IWorkloadsOverviewRouteParams } from "../+workloads";
@@ -15,60 +14,23 @@ import { replicaSetStore } from "../+workloads-replicasets/replicasets.store";
 import { jobStore } from "../+workloads-jobs/job.store";
 import { cronJobStore } from "../+workloads-cronjobs/cronjob.store";
 import { Events } from "../+events";
-import { KubeObjectStore } from "../../kube-object.store";
 import { isAllowedResource } from "../../../common/rbac";
-import { namespaceStore } from "../+namespaces/namespace.store";
+import { kubeWatchApi } from "../../api/kube-watch-api";
 
 interface Props extends RouteComponentProps<IWorkloadsOverviewRouteParams> {
 }
 
 @observer
 export class WorkloadsOverview extends React.Component<Props> {
-  @observable isLoading = false;
-  @observable isUnmounting = false;
-
-  async componentDidMount() {
-    const stores: KubeObjectStore[] = [
-      isAllowedResource("pods") && podsStore,
-      isAllowedResource("deployments") && deploymentStore,
-      isAllowedResource("daemonsets") && daemonSetStore,
-      isAllowedResource("statefulsets") && statefulSetStore,
-      isAllowedResource("replicasets") && replicaSetStore,
-      isAllowedResource("jobs") && jobStore,
-      isAllowedResource("cronjobs") && cronJobStore,
-      isAllowedResource("events") && eventStore,
-    ].filter(Boolean);
-
-    const unsubscribeMap = new Map<KubeObjectStore, () => void>();
-
-    const loadStores = async () => {
-      this.isLoading = true;
-
-      for (const store of stores) {
-        if (this.isUnmounting) break;
-
-        try {
-          await store.loadAll();
-          unsubscribeMap.get(store)?.(); // unsubscribe previous watcher
-          unsubscribeMap.set(store, store.subscribe());
-        } catch (error) {
-          console.error("loading store error", error);
-        }
-      }
-      this.isLoading = false;
-    };
-
-    namespaceStore.onContextChange(loadStores, {
-      fireImmediately: true,
-    });
-
-    await when(() => this.isUnmounting && !this.isLoading);
-    unsubscribeMap.forEach(dispose => dispose());
-    unsubscribeMap.clear();
-  }
-
-  componentWillUnmount() {
-    this.isUnmounting = true;
+  componentDidMount() {
+    disposeOnUnmount(this, [
+      kubeWatchApi.subscribeStores([
+        podsStore, deploymentStore, daemonSetStore, statefulSetStore, replicaSetStore,
+        jobStore, cronJobStore, eventStore,
+      ], {
+        preload: true,
+      }),
+    ]);
   }
 
   render() {