From e21f642cb932466a2bbbafd19634f6050b11f3b6 Mon Sep 17 00:00:00 2001
From: Erik Darling <2136037+erikdarlingdata@users.noreply.github.com>
Date: Sun, 15 Feb 2026 14:32:13 -0500
Subject: [PATCH] Add Collection Health tab to Lite UI (#39)
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Surface the existing GetCollectionHealthAsync() data in a new tab showing
per-collector status, run counts, failure rates, avg duration, timestamps,
and last error message. Includes column-level filtering.

The backend data (collection_log table, health computation) already existed
but was never displayed in the UI — only accessible via status bar tooltip
or MCP tool.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 Lite/Controls/ServerTab.xaml                  | 43 +++++++++++++++++++
 Lite/Controls/ServerTab.xaml.cs               |  7 ++-
 .../LocalDataService.CollectionHealth.cs      |  8 ++++
 3 files changed, 57 insertions(+), 1 deletion(-)

diff --git a/Lite/Controls/ServerTab.xaml b/Lite/Controls/ServerTab.xaml
index 144f662a..54c51ed7 100644
--- a/Lite/Controls/ServerTab.xaml
+++ b/Lite/Controls/ServerTab.xaml
@@ -971,6 +971,49 @@
                 </Grid>
             </TabItem>
 
+            <!-- Collection Health Tab -->
+            <TabItem Header="Collection Health">
+                <Grid Margin="8">
+                    <DataGrid x:Name="CollectionHealthGrid"
+                              AutoGenerateColumns="False" IsReadOnly="True"
+                              RowStyle="{StaticResource GridRowStyle}"
+                              HeadersVisibility="Column" GridLinesVisibility="Horizontal">
+                        <DataGrid.Columns>
+                            <DataGridTextColumn Binding="{Binding CollectorName}" Width="180">
+                                <DataGridTextColumn.Header><StackPanel Orientation="Horizontal"><Button Style="{DynamicResource ColumnFilterButtonStyle}" Tag="CollectorName" Click="FilterButton_Click" Margin="0,0,4,0"/><TextBlock Text="Collector" FontWeight="Bold" VerticalAlignment="Center"/></StackPanel></DataGridTextColumn.Header>
+                            </DataGridTextColumn>
+                            <DataGridTextColumn Binding="{Binding HealthStatus}" Width="90">
+                                <DataGridTextColumn.Header><StackPanel Orientation="Horizontal"><Button Style="{DynamicResource ColumnFilterButtonStyle}" Tag="HealthStatus" Click="FilterButton_Click" Margin="0,0,4,0"/><TextBlock Text="Status" FontWeight="Bold" VerticalAlignment="Center"/></StackPanel></DataGridTextColumn.Header>
+                            </DataGridTextColumn>
+                            <DataGridTextColumn Binding="{Binding TotalRuns, StringFormat=N0}" Width="80">
+                                <DataGridTextColumn.Header><StackPanel Orientation="Horizontal"><Button Style="{DynamicResource ColumnFilterButtonStyle}" Tag="TotalRuns" Click="FilterButton_Click" Margin="0,0,4,0"/><TextBlock Text="Runs" FontWeight="Bold" VerticalAlignment="Center"/></StackPanel></DataGridTextColumn.Header>
+                            </DataGridTextColumn>
+                            <DataGridTextColumn Binding="{Binding SuccessCount, StringFormat=N0}" Width="80">
+                                <DataGridTextColumn.Header><StackPanel Orientation="Horizontal"><Button Style="{DynamicResource ColumnFilterButtonStyle}" Tag="SuccessCount" Click="FilterButton_Click" Margin="0,0,4,0"/><TextBlock Text="Success" FontWeight="Bold" VerticalAlignment="Center"/></StackPanel></DataGridTextColumn.Header>
+                            </DataGridTextColumn>
+                            <DataGridTextColumn Binding="{Binding ErrorCount, StringFormat=N0}" Width="80">
+                                <DataGridTextColumn.Header><StackPanel Orientation="Horizontal"><Button Style="{DynamicResource ColumnFilterButtonStyle}" Tag="ErrorCount" Click="FilterButton_Click" Margin="0,0,4,0"/><TextBlock Text="Errors" FontWeight="Bold" VerticalAlignment="Center"/></StackPanel></DataGridTextColumn.Header>
+                            </DataGridTextColumn>
+                            <DataGridTextColumn Binding="{Binding FailureRatePercent, StringFormat=N1}" Width="85">
+                                <DataGridTextColumn.Header><StackPanel Orientation="Horizontal"><Button Style="{DynamicResource ColumnFilterButtonStyle}" Tag="FailureRatePercent" Click="FilterButton_Click" Margin="0,0,4,0"/><TextBlock Text="Fail %" FontWeight="Bold" VerticalAlignment="Center"/></StackPanel></DataGridTextColumn.Header>
+                            </DataGridTextColumn>
+                            <DataGridTextColumn Binding="{Binding AvgDurationFormatted}" Width="100">
+                                <DataGridTextColumn.Header><StackPanel Orientation="Horizontal"><Button Style="{DynamicResource ColumnFilterButtonStyle}" Tag="AvgDurationFormatted" Click="FilterButton_Click" Margin="0,0,4,0"/><TextBlock Text="Avg Duration" FontWeight="Bold" VerticalAlignment="Center"/></StackPanel></DataGridTextColumn.Header>
+                            </DataGridTextColumn>
+                            <DataGridTextColumn Binding="{Binding LastSuccessFormatted}" Width="140">
+                                <DataGridTextColumn.Header><StackPanel Orientation="Horizontal"><Button Style="{DynamicResource ColumnFilterButtonStyle}" Tag="LastSuccessFormatted" Click="FilterButton_Click" Margin="0,0,4,0"/><TextBlock Text="Last Success" FontWeight="Bold" VerticalAlignment="Center"/></StackPanel></DataGridTextColumn.Header>
+                            </DataGridTextColumn>
+                            <DataGridTextColumn Binding="{Binding LastRunFormatted}" Width="140">
+                                <DataGridTextColumn.Header><StackPanel Orientation="Horizontal"><Button Style="{DynamicResource ColumnFilterButtonStyle}" Tag="LastRunFormatted" Click="FilterButton_Click" Margin="0,0,4,0"/><TextBlock Text="Last Run" FontWeight="Bold" VerticalAlignment="Center"/></StackPanel></DataGridTextColumn.Header>
+                            </DataGridTextColumn>
+                            <DataGridTextColumn Binding="{Binding LastError}" Width="*">
+                                <DataGridTextColumn.Header><StackPanel Orientation="Horizontal"><Button Style="{DynamicResource ColumnFilterButtonStyle}" Tag="LastError" Click="FilterButton_Click" Margin="0,0,4,0"/><TextBlock Text="Last Error" FontWeight="Bold" VerticalAlignment="Center"/></StackPanel></DataGridTextColumn.Header>
+                            </DataGridTextColumn>
+                        </DataGrid.Columns>
+                    </DataGrid>
+                </Grid>
+            </TabItem>
+
         </TabControl>
     </Grid>
 </UserControl>
diff --git a/Lite/Controls/ServerTab.xaml.cs b/Lite/Controls/ServerTab.xaml.cs
index 6c0c7cdd..f89a517b 100644
--- a/Lite/Controls/ServerTab.xaml.cs
+++ b/Lite/Controls/ServerTab.xaml.cs
@@ -58,6 +58,7 @@ public partial class ServerTab : UserControl
     private DataGridFilterManager<DatabaseConfigRow>? _databaseConfigFilterMgr;
     private DataGridFilterManager<DatabaseScopedConfigRow>? _dbScopedConfigFilterMgr;
     private DataGridFilterManager<TraceFlagRow>? _traceFlagsFilterMgr;
+    private DataGridFilterManager<CollectorHealthRow>? _collectionHealthFilterMgr;
 
     private static readonly HashSet<string> _defaultPerfmonCounters = new(StringComparer.OrdinalIgnoreCase)
     {
@@ -444,6 +445,7 @@ private async System.Threading.Tasks.Task RefreshAllDataAsync()
             var databaseScopedConfigTask = SafeQueryAsync(() => _dataService.GetLatestDatabaseScopedConfigAsync(_serverId));
             var traceFlagsTask = SafeQueryAsync(() => _dataService.GetLatestTraceFlagsAsync(_serverId));
             var runningJobsTask = SafeQueryAsync(() => _dataService.GetRunningJobsAsync(_serverId));
+            var collectionHealthTask = SafeQueryAsync(() => _dataService.GetCollectionHealthAsync(_serverId));
             /* Core data tasks */
             await System.Threading.Tasks.Task.WhenAll(
                 snapshotsTask, cpuTask, memoryTask, memoryTrendTask,
@@ -451,7 +453,7 @@ await System.Threading.Tasks.Task.WhenAll(
                 deadlockTask, blockedProcessTask, waitTypesTask, perfmonCountersTask,
                 queryStoreTask, memoryGrantTrendTask,
                 serverConfigTask, databaseConfigTask, databaseScopedConfigTask, traceFlagsTask,
-                runningJobsTask);
+                runningJobsTask, collectionHealthTask);
 
             /* Trend chart tasks - run separately so failures don't kill the whole refresh */
             var blockingTrendTask = SafeQueryAsync(() => _dataService.GetBlockingTrendAsync(_serverId, hoursBack, fromDate, toDate));
@@ -488,6 +490,7 @@ await System.Threading.Tasks.Task.WhenAll(
             _dbScopedConfigFilterMgr!.UpdateData(databaseScopedConfigTask.Result);
             _traceFlagsFilterMgr!.UpdateData(traceFlagsTask.Result);
             _runningJobsFilterMgr!.UpdateData(runningJobsTask.Result);
+            _collectionHealthFilterMgr!.UpdateData(collectionHealthTask.Result);
 
             /* Update memory summary */
             UpdateMemorySummary(memoryTask.Result);
@@ -1864,6 +1867,7 @@ private void InitializeFilterManagers()
         _databaseConfigFilterMgr = new DataGridFilterManager<DatabaseConfigRow>(DatabaseConfigGrid);
         _dbScopedConfigFilterMgr = new DataGridFilterManager<DatabaseScopedConfigRow>(DatabaseScopedConfigGrid);
         _traceFlagsFilterMgr = new DataGridFilterManager<TraceFlagRow>(TraceFlagsGrid);
+        _collectionHealthFilterMgr = new DataGridFilterManager<CollectorHealthRow>(CollectionHealthGrid);
 
         _filterManagers[QuerySnapshotsGrid] = _querySnapshotsFilterMgr;
         _filterManagers[QueryStatsGrid] = _queryStatsFilterMgr;
@@ -1876,6 +1880,7 @@ private void InitializeFilterManagers()
         _filterManagers[DatabaseConfigGrid] = _databaseConfigFilterMgr;
         _filterManagers[DatabaseScopedConfigGrid] = _dbScopedConfigFilterMgr;
         _filterManagers[TraceFlagsGrid] = _traceFlagsFilterMgr;
+        _filterManagers[CollectionHealthGrid] = _collectionHealthFilterMgr;
     }
 
     private void EnsureFilterPopup()
diff --git a/Lite/Services/LocalDataService.CollectionHealth.cs b/Lite/Services/LocalDataService.CollectionHealth.cs
index 46c85a10..5ba3a7a3 100644
--- a/Lite/Services/LocalDataService.CollectionHealth.cs
+++ b/Lite/Services/LocalDataService.CollectionHealth.cs
@@ -94,5 +94,13 @@ public string HealthStatus
     public string AvgDurationFormatted => AvgDurationMs < 1000
         ? $"{AvgDurationMs:F0} ms"
         : $"{AvgDurationMs / 1000:F1} s";
+
+    public string LastSuccessFormatted => LastSuccessTime.HasValue
+        ? LastSuccessTime.Value.ToLocalTime().ToString("MM/dd HH:mm:ss")
+        : "Never";
+
+    public string LastRunFormatted => LastRunTime.HasValue
+        ? LastRunTime.Value.ToLocalTime().ToString("MM/dd HH:mm:ss")
+        : "Never";
 }