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fix(galaxy): seed platforms with one template filter per request (#864)

Browse Source 
The gateway's shared GalaxyHierarchyProjector ANDs template_chain_contains
entries, so the single request carrying both $WinPlatform and $AppEngine
matched no object and the probe watcher always seeded 0 platforms.
GatewayGalaxyPlatformSource now runs one paged sweep per template and
unions/dedupes by tag name. The tests use a fake gateway that applies the
projector's AND semantics (they fail on the old single request).

Claude-Session: https://claude.ai/code/session_01GT67AD99zQQqpLCVm3p7xk
This commit is contained in:
Joseph Doherty
2026-11-11 12:24:03 -05:00
parent e857135e8b
commit c4bc1ef309
2 changed files with 125 additions and 46 deletions
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src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Galaxy/Browse/GatewayGalaxyPlatformSource.cs
+41 -28
View File
@@ -5,11 +5,19 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Galaxy.Browse;
/// <summary>
/// Default <see cref="IGalaxyPlatformSource"/>: a platform-only <c>DiscoverHierarchy</c> sweep
/// over the gateway's <see cref="GalaxyRepositoryClient"/> — the request filters on
/// <c>template_chain_contains</c> (<c>$WinPlatform</c>, <c>$AppEngine</c>) and asks for no
/// attributes, so it is a few rows per galaxy rather than the full object + attribute dump the
/// address-space discovery pulls. Paged at the configured <c>Repository.DiscoverPageSize</c>.
/// over the gateway's <see cref="GalaxyRepositoryClient"/> — one sweep per platform template
/// (<c>$WinPlatform</c>, then <c>$AppEngine</c>), each filtered on that single
/// <c>template_chain_contains</c> token with no attributes, so it is a few rows per galaxy rather
/// than the full object + attribute dump the address-space discovery pulls. Paged at the
/// configured <c>Repository.DiscoverPageSize</c>.
/// </summary>
/// <remarks>
/// ⚠️ <b>One template per request (#864).</b> The gateway's shared
/// <c>GalaxyHierarchyProjector.MatchesFilters</c> ANDs the <c>template_chain_contains</c> entries —
/// an object must match <i>every</i> token — so a single request carrying both templates matches no
/// platform (a <c>$WinPlatform</c>'s chain has no <c>$AppEngine</c>, and vice versa) and the probe
/// watcher seeded 0 platforms in production. The sweeps are unioned and de-duplicated by tag name.
/// </remarks>
public sealed class GatewayGalaxyPlatformSource : IGalaxyPlatformSource
{
/// <summary>Template-chain tokens that identify a platform / engine object.</summary>
@@ -32,15 +40,16 @@ public sealed class GatewayGalaxyPlatformSource : IGalaxyPlatformSource
=> QueryAsync(_client.DiscoverHierarchyRawAsync, _pageSize, cancellationToken);
/// <summary>
/// The platform-only sweep behind a delegate so it is unit-testable without a channel. Every
/// request carries the template filter and <c>include_attributes = false</c>; the reply is
/// The platform-only sweeps behind a delegate so it is unit-testable without a channel. One
/// paged sweep per entry of <see cref="PlatformTemplates"/>; every request carries exactly that
/// one template token and <c>include_attributes = false</c>; the reply is
/// re-filtered on the returned template chain (a gateway that ignores the filter still
/// yields only platforms) and reduced to non-empty tag names.
/// </summary>
/// <param name="discover">The raw <c>DiscoverHierarchy</c> RPC.</param>
/// <param name="pageSize">Objects per page.</param>
/// <param name="cancellationToken">Cancellation token for the walk.</param>
/// <returns>Distinct platform tag names in gateway order.</returns>
/// <returns>Distinct platform tag names: <c>$WinPlatform</c> sweep first, then <c>$AppEngine</c>, each in gateway order.</returns>
internal static async Task<IReadOnlyList<string>> QueryAsync(
Func<DiscoverHierarchyRequest, CancellationToken, Task<DiscoverHierarchyReply>> discover,
int pageSize,
@@ -51,33 +60,37 @@ public sealed class GatewayGalaxyPlatformSource : IGalaxyPlatformSource
var names = new List<string>();
var seen = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
var seenPageTokens = new HashSet<string>(StringComparer.Ordinal);
var pageToken = string.Empty;
do
foreach (var template in PlatformTemplates)
{
var request = new DiscoverHierarchyRequest
var seenPageTokens = new HashSet<string>(StringComparer.Ordinal);
var pageToken = string.Empty;
do
{
PageSize = effective,
PageToken = pageToken,
IncludeAttributes = false,
};
request.TemplateChainContains.Add(PlatformTemplates);
var request = new DiscoverHierarchyRequest
{
PageSize = effective,
PageToken = pageToken,
IncludeAttributes = false,
};
// Exactly ONE token per request: the gateway ANDs template filters (#864).
request.TemplateChainContains.Add(template);
var reply = await discover(request, cancellationToken).ConfigureAwait(false);
foreach (var obj in reply.Objects)
{
if (string.IsNullOrEmpty(obj.TagName) || !IsPlatform(obj)) continue;
if (seen.Add(obj.TagName)) names.Add(obj.TagName);
}
var reply = await discover(request, cancellationToken).ConfigureAwait(false);
foreach (var obj in reply.Objects)
{
if (string.IsNullOrEmpty(obj.TagName) || !IsPlatform(obj)) continue;
if (seen.Add(obj.TagName)) names.Add(obj.TagName);
}
pageToken = reply.NextPageToken ?? string.Empty;
if (!string.IsNullOrWhiteSpace(pageToken) && !seenPageTokens.Add(pageToken))
{
throw new InvalidOperationException(
$"Galaxy DiscoverHierarchy (platform query) returned a repeated page token '{pageToken}' — refusing to loop.");
pageToken = reply.NextPageToken ?? string.Empty;
if (!string.IsNullOrWhiteSpace(pageToken) && !seenPageTokens.Add(pageToken))
{
throw new InvalidOperationException(
$"Galaxy DiscoverHierarchy (platform query, {template}) returned a repeated page token '{pageToken}' — refusing to loop.");
}
}
while (!string.IsNullOrWhiteSpace(pageToken));
}
while (!string.IsNullOrWhiteSpace(pageToken));
return names;
}