fix(loading): ensure loading spinners are displayed

src/app/Events/EventTemplates.tsx

@@ -249,26 +249,32 @@ export const EventTemplates = () => {
     setSortBy({ index, direction });
   };
 
+  const toolbar: JSX.Element = (<>
+    <Toolbar id="event-templates-toolbar">
+      <ToolbarContent>
+        <ToolbarGroup variant="filter-group">
+          <ToolbarItem>
+            <TextInput name="templateFilter" id="templateFilter" type="search" placeholder="Filter..." aria-label="Event template filter" onChange={setFilterText}/>
+          </ToolbarItem>
+        </ToolbarGroup>
+        <ToolbarGroup variant="icon-button-group">
+          <ToolbarItem>
+            <Button key="create" variant="primary" onClick={handleModalToggle}>Upload</Button>
+          </ToolbarItem>
+        </ToolbarGroup>
+      </ToolbarContent>
+    </Toolbar>
+  </>);
   if (errorMessage != '') {
-    return (<ErrorView message={errorMessage}/>)
+    return (<ErrorView message={errorMessage}/>);
   } else if (isLoading) {
-    return (<LoadingView/>)
+    return (<>
+      { toolbar }
+      <LoadingView/>
+    </>);
   } else {
     return (<>
-      <Toolbar id="event-templates-toolbar">
-        <ToolbarContent>
-          <ToolbarGroup variant="filter-group">
-            <ToolbarItem>
-              <TextInput name="templateFilter" id="templateFilter" type="search" placeholder="Filter..." aria-label="Event template filter" onChange={setFilterText}/>
-            </ToolbarItem>
-          </ToolbarGroup>
-          <ToolbarGroup variant="icon-button-group">
-            <ToolbarItem>
-              <Button key="create" variant="primary" onClick={handleModalToggle}>Upload</Button>
-            </ToolbarItem>
-          </ToolbarGroup>
-        </ToolbarContent>
-      </Toolbar>
+      { toolbar }
       <Table aria-label="Event Templates table"
         variant={TableVariant.compact}
         cells={tableColumns}

src/app/Recordings/RecordingsTable.tsx

@@ -1,32 +1,32 @@
 /*
  * Copyright The Cryostat Authors
- * 
+ *
  * The Universal Permissive License (UPL), Version 1.0
- * 
+ *
  * Subject to the condition set forth below, permission is hereby granted to any
  * person obtaining a copy of this software, associated documentation and/or data
  * (collectively the "Software"), free of charge and under any and all copyright
  * rights in the Software, and any and all patent rights owned or freely
  * licensable by each licensor hereunder covering either (i) the unmodified
  * Software as contributed to or provided by such licensor, or (ii) the Larger
  * Works (as defined below), to deal in both
- * 
+ *
  * (a) the Software, and
  * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
  * one is included with the Software (each a "Larger Work" to which the Software
  * is contributed by such licensors),
- * 
+ *
  * without restriction, including without limitation the rights to copy, create
  * derivative works of, display, perform, and distribute the Software and make,
  * use, sell, offer for sale, import, export, have made, and have sold the
  * Software and the Larger Work(s), and to sublicense the foregoing rights on
  * either these or other terms.
- * 
+ *
  * This license is subject to the following condition:
  * The above copyright notice and either this complete permission notice or at
  * a minimum a reference to the UPL must be included in all copies or
  * substantial portions of the Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
@@ -54,24 +54,22 @@ export interface RecordingsTableProps {
 }
 
 export const RecordingsTable: React.FunctionComponent<RecordingsTableProps> = (props) => {
+  let view: JSX.Element;
   if (props.errorMessage != '') {
-    return (<ErrorView message={props.errorMessage}/>)
+    view = (<ErrorView message={props.errorMessage}/>)
   } else if (props.isLoading) {
-    return (<LoadingView/>)
+    view = (<LoadingView/>)
   } else if (props.isEmpty) {
-    return (
-    <>
-      { props.toolbar }
+    view = (<>
       <EmptyState>
         <EmptyStateIcon icon={SearchIcon}/>
         <Title headingLevel="h4" size="lg">
           No {props.tableTitle}
         </Title>
       </EmptyState>
-    </>)
+    </>);
   } else {
-    return (<>
-      { props.toolbar }
+    view = (<>
       <TableComposable aria-label={props.tableTitle}>
         <Thead>
           <Tr>
@@ -93,4 +91,9 @@ export const RecordingsTable: React.FunctionComponent<RecordingsTableProps> = (p
       </TableComposable>
     </>);
   }
+
+  return (<>
+    { props.toolbar }
+    { view }
+  </>);
 };

src/app/Rules/Rules.tsx

@@ -200,7 +200,9 @@ export const Rules = () => {
   };
 
   const viewContent = () => {
-    if (rules.length === 0) {
+    if (isLoading) {
+      return <LoadingView />;
+    } else if (rules.length === 0) {
       return (<>
         <EmptyState>
           <EmptyStateIcon icon={SearchIcon}/>
@@ -209,8 +211,6 @@ export const Rules = () => {
           </Title>
         </EmptyState>
       </>);
-    } else if (isLoading) {
-      return <LoadingView />;
     } else {
       return (<>
         <Table aria-label="Automated Rules table"

src/app/SecurityPanel/StoreJmxCredentials.tsx

@@ -56,6 +56,7 @@ import { TableComposable, Tbody, Td, Th, Thead, Tr } from '@patternfly/react-tab
 import { CreateJmxCredentialModal } from './CreateJmxCredentialModal';
 import { SecurityCard } from './SecurityPanel';
 import { NotificationCategory } from '@app/Shared/Services/NotificationChannel.service';
+import { LoadingView } from '@app/LoadingView/LoadingView';
 
 const Component = () => {
   const context = React.useContext(ServiceContext);
@@ -66,12 +67,17 @@ const Component = () => {
   const [headerChecked, setHeaderChecked] = React.useState(false);
   const [checkedIndices, setCheckedIndices] = React.useState([] as number[]);
   const [showAuthModal, setShowAuthModal] = React.useState(false);
+  const [isLoading, setIsLoading] = React.useState(false);
 
   const tableColumns: string[] = ['Target Alias', 'Connect URL'];
   const tableTitle = 'Stored Credentials';
 
   const refreshStoredTargetsList = React.useCallback(() => {
-    addSubscription(context.api.getTargetsWithStoredJmxCredentials().subscribe(t => setStoredTargets(t)));
+    setIsLoading(true);
+    addSubscription(context.api.getTargetsWithStoredJmxCredentials().subscribe((t: Target[]) => {
+      setStoredTargets(t);
+      setIsLoading(false);
+    }));
   }, [context, context.api, context.targets, setStoredTargets]);
 
   React.useEffect(() => {
@@ -194,49 +200,53 @@ const Component = () => {
     return storedTargets.map((t, idx) => <TargetCredentialsTableRow key={idx} target={t} index={idx} />);
   }, [storedTargets, checkedIndices]);
 
-  return (
-    <>
-      {storedTargets.length === 0 ? (
-        <>
-          <TargetCredentialsToolbar />
-          <EmptyState>
-            <EmptyStateIcon icon={SearchIcon} />
-            <Title headingLevel="h4" size="lg">
-              No {tableTitle}
-            </Title>
-          </EmptyState>
-        </>
-      ) : (
-        <>
-          <TargetCredentialsToolbar />
-          <TableComposable aria-label={tableTitle}>
-            <Thead>
-              <Tr>
-                <Th
-                  key="table-header-check-all"
-                  select={{
-                    onSelect: handleHeaderCheck,
-                    isSelected: headerChecked,
-                  }}
-                />
-                {tableColumns.map((key, idx) => (
-                  <Th key={`table-header-${key}`}>{key}</Th>
-                ))}
-              </Tr>
-            </Thead>
-            {targetRows}
-          </TableComposable>
-        </>
-      )}
-      <CreateJmxCredentialModal visible={showAuthModal} onClose={handleModalClose} />
-    </>
-  );
+  let content: JSX.Element;
+  if (isLoading) {
+    content = (<>
+      <LoadingView />
+    </>);
+  } else if (storedTargets.length === 0) {
+    content = (<>
+      <EmptyState>
+        <EmptyStateIcon icon={SearchIcon} />
+        <Title headingLevel="h4" size="lg">
+          No {tableTitle}
+        </Title>
+      </EmptyState>
+    </>);
+  } else {
+    content = (<>
+      <TableComposable aria-label={tableTitle}>
+        <Thead>
+          <Tr>
+            <Th
+              key="table-header-check-all"
+              select={{
+                onSelect: handleHeaderCheck,
+                  isSelected: headerChecked,
+              }}
+            />
+            {tableColumns.map((key, idx) => (
+              <Th key={`table-header-${key}`}>{key}</Th>
+            ))}
+          </Tr>
+        </Thead>
+        {targetRows}
+      </TableComposable>
+    </>);
+  }
+
+  return (<>
+    <TargetCredentialsToolbar />
+    { content }
+    <CreateJmxCredentialModal visible={showAuthModal} onClose={handleModalClose} />
+  </>);
 };
 
 export const StoreJmxCredentials: SecurityCard = {
   title: 'Store JMX Credentials',
-  description: `Targets for which Cryostat has stored JMX credentials are listed here. 
-    If a Target JVM requires JMX authentication, Cryostat will use stored credentials 
+  description: `Targets for which Cryostat has stored JMX credentials are listed here.
+    If a Target JVM requires JMX authentication, Cryostat will use stored credentials
     when attempting to open JMX connections to the target.`,
   content: Component,
 };