Return RequestErrorCode.NO_INDEX_GENERATED for search/refactoring requests.

pkg/analysis_server/lib/src/analysis_server.dart

 // Copyright (c) 2014, 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 analysis.server;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:math' show max;
 
@@ skipping 71 matching lines @@
    * be sent.
    */
   final ServerCommunicationChannel channel;
 
   /**
    * The [ResourceProvider] using which paths are converted into [Resource]s.
    */
   final ResourceProvider resourceProvider;
 
   /**
-   * The [Index] for this server.
+   * The [Index] for this server, may be `null` if indexing is disabled.
    */
   final Index index;
 
   /**
-   * The [SearchEngine] for this server.
+   * The [SearchEngine] for this server, may be `null` if indexing is disabled.
    */
-  SearchEngine searchEngine;
+  final SearchEngine searchEngine;
 
   /**
    * [ContextManager] which handles the mapping from analysis roots
    * to context directories.
    */
   ServerContextManager contextDirectoryManager;
 
   /**
    * A flag indicating whether the server is running.  When false, contexts
    * will no longer be added to [contextWorkQueue], and [performOperation] will
@@ skipping 125 matching lines @@
   /**
    * Initialize a newly created server to receive requests from and send
    * responses to the given [channel].
    *
    * If [rethrowExceptions] is true, then any exceptions thrown by analysis are
    * propagated up the call stack.  The default is true to allow analysis
    * exceptions to show up in unit tests, but it should be set to false when
    * running a full analysis server.
    */
   AnalysisServer(this.channel, this.resourceProvider,
-      PackageMapProvider packageMapProvider, this.index,
+      PackageMapProvider packageMapProvider, Index _index,
       AnalysisServerOptions analysisServerOptions, this.defaultSdk,
-      this.instrumentationService, {this.rethrowExceptions: true}) {
+      this.instrumentationService, {this.rethrowExceptions: true})
+      : index = _index,
+        searchEngine = _index != null ? createSearchEngine(_index) : null {
     _performance = performanceDuringStartup;
-    searchEngine = createSearchEngine(index);
     operationQueue = new ServerOperationQueue();
     contextDirectoryManager =
         new ServerContextManager(this, resourceProvider, packageMapProvider);
     contextDirectoryManager.defaultOptions.incremental = true;
     contextDirectoryManager.defaultOptions.incrementalApi =
         analysisServerOptions.enableIncrementalResolutionApi;
     contextDirectoryManager.defaultOptions.incrementalValidation =
         analysisServerOptions.enableIncrementalResolutionValidation;
     _noErrorNotification = analysisServerOptions.noErrorNotification;
     AnalysisEngine.instance.logger = new AnalysisLogger();
@@ skipping 836 matching lines @@
     }
     performOperationPending = true;
   }
 }
 
 
 class AnalysisServerOptions {
   bool enableIncrementalResolutionApi = false;
   bool enableIncrementalResolutionValidation = false;
   bool noErrorNotification = false;
+  bool noIndex = false;
   String fileReadMode = 'as-is';
 }
 
 /**
  * A [ContextsChangedEvent] indicate what contexts were added or removed.
  *
  * No context should be added to the event more than once. It does not make
  * sense, for example, for a context to be both added and removed.
  */
 class ContextsChangedEvent {
@@ skipping 209 matching lines @@
           new DateTime.now().millisecondsSinceEpoch -
           request.clientRequestTime;
       requestLatency += latency;
       maxLatency = max(maxLatency, latency);
       if (latency > 150) {
         ++slowRequestCount;
       }
     }
   }
 }