Move diagnostics to `diagnostics` domain (#24931).

pkg/analysis_server/lib/src/domain_experimental.dart

Index: pkg/analysis_server/lib/src/domain_experimental.dart
diff --git a/pkg/analysis_server/lib/src/domain_experimental.dart b/pkg/analysis_server/lib/src/domain_experimental.dart
deleted file mode 100644
index 0e34409e42e9208008e9f7f75920a0b28fdc443c..0000000000000000000000000000000000000000
--- a/pkg/analysis_server/lib/src/domain_experimental.dart
+++ /dev/null
@@ -1,95 +0,0 @@
-// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-library src.domain_experimental;
-
-import 'dart:collection';
-import 'dart:core' hide Resource;
-
-import 'package:analysis_server/plugin/protocol/protocol.dart';
-import 'package:analysis_server/src/analysis_server.dart';
-import 'package:analyzer/file_system/file_system.dart';
-import 'package:analyzer/src/context/cache.dart';
-import 'package:analyzer/src/context/context.dart';
-import 'package:analyzer/src/generated/engine.dart'
-    hide AnalysisCache, AnalysisContextImpl;
-import 'package:analyzer/src/generated/source.dart';
-import 'package:analyzer/src/generated/utilities_collection.dart';
-import 'package:analyzer/src/task/driver.dart';
-import 'package:analyzer/task/model.dart';
-
-/// Extract context data from the given [context].
-ContextData extractData(AnalysisContext context) {
-  int explicitFiles = 0;
-  int implicitFiles = 0;
-  int workItems = 0;
-  Set<String> exceptions = new HashSet<String>();
-  if (context is AnalysisContextImpl) {
-    // Work Item count.
-    AnalysisDriver driver = context.driver;
-    List<WorkItem> items = driver.currentWorkOrder?.workItems;
-    workItems ??= items?.length;
-    var cache = context.analysisCache;
-    if (cache is AnalysisCache) {
-      Set<AnalysisTarget> countedTargets = new HashSet<AnalysisTarget>();
-      MapIterator<AnalysisTarget, CacheEntry> iterator = cache.iterator();
-      while (iterator.moveNext()) {
-        AnalysisTarget target = iterator.key;
-        if (countedTargets.add(target)) {
-          CacheEntry cacheEntry = iterator.value;
-          if (target is Source) {
-            if (cacheEntry.explicitlyAdded) {
-              explicitFiles++;
-            } else {
-              implicitFiles++;
-            }
-          }
-          // Caught exceptions.
-          if (cacheEntry.exception != null) {
-            exceptions.add(cacheEntry.exception.toString());
-          }
-        }
-      }
-    }
-  }
-  return new ContextData(context.name, explicitFiles, implicitFiles, workItems,
-      exceptions.toList());
-}
-
-/// Instances of the class [ExperimentalDomainHandler] implement a
-/// [RequestHandler] that handles requests in the `experimental` domain.
-class ExperimentalDomainHandler implements RequestHandler {
-  /// The name of the request used to get diagnostic information.
-  static const String EXPERIMENTAL_DIAGNOSTICS = 'experimental.getDiagnostics';
-
-  /// The analysis server that is using this handler to process requests.
-  final AnalysisServer server;
-
-  /// Initialize a newly created handler to handle requests for the given
-  /// [server].
-  ExperimentalDomainHandler(this.server);
-
-  /// Answer the `experimental.diagnostics` request.
-  Response computeDiagnostics(Request request) {
-    List<ContextData> infos = <ContextData>[];
-    server.folderMap.forEach((Folder folder, AnalysisContext context) {
-      infos.add(extractData(context));
-    });
-
-    return new ExperimentalGetDiagnosticsResult(infos).toResponse(request.id);
-  }
-
-  @override
-  Response handleRequest(Request request) {
-    try {
-      String requestName = request.method;
-      if (requestName == EXPERIMENTAL_DIAGNOSTICS) {
-        return computeDiagnostics(request);
-      }
-    } on RequestFailure catch (exception) {
-      return exception.response;
-    }
-    return null;
-  }
-}