Validate cache consistency asynchronously. Compute modification times of physical files in a separa…

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:core' hide Resource;
 import 'dart:io' as io;
@@ skipping 681 matching lines @@
     List<AstNode> nodes = <AstNode>[];
     for (CompilationUnit unit in units) {
       AstNode node = new NodeLocator(offset).searchWithin(unit);
       if (node != null) {
         nodes.add(node);
       }
     }
     return nodes;
   }
 
-// TODO(brianwilkerson) Add the following method after 'prioritySources' has
-// been added to InternalAnalysisContext.
-//  /**
-//   * Return a list containing the full names of all of the sources that are
-//   * priority sources.
-//   */
-//  List<String> getPriorityFiles() {
-//    List<String> priorityFiles = new List<String>();
-//    folderMap.values.forEach((ContextDirectory directory) {
-//      InternalAnalysisContext context = directory.context;
-//      context.prioritySources.forEach((Source source) {
-//        priorityFiles.add(source.fullName);
-//      });
-//    });
-//    return priorityFiles;
-//  }
-
   /**
    * Returns resolved [CompilationUnit]s of the Dart file with the given [path].
    *
    * May be empty, but not `null`.
    */
   List<CompilationUnit> getResolvedCompilationUnits(String path) {
     List<CompilationUnit> units = <CompilationUnit>[];
     ContextSourcePair contextSource = getContextSourcePair(path);
     // prepare AnalysisContext
     AnalysisContext context = contextSource.context;
     if (context == null) {
       return units;
     }
     // add a unit for each unit/library combination
     runWithWorkingCacheSize(context, () {
       Source unitSource = contextSource.source;
       List<Source> librarySources = context.getLibrariesContaining(unitSource);
       for (Source librarySource in librarySources) {
         CompilationUnit unit =
             context.resolveCompilationUnit2(unitSource, librarySource);
         if (unit != null) {
           units.add(unit);
         }
       }
     });
     // done
     return units;
   }
 
+// TODO(brianwilkerson) Add the following method after 'prioritySources' has
+// been added to InternalAnalysisContext.
+//  /**
+//   * Return a list containing the full names of all of the sources that are
+//   * priority sources.
+//   */
+//  List<String> getPriorityFiles() {
+//    List<String> priorityFiles = new List<String>();
+//    folderMap.values.forEach((ContextDirectory directory) {
+//      InternalAnalysisContext context = directory.context;
+//      context.prioritySources.forEach((Source source) {
+//        priorityFiles.add(source.fullName);
+//      });
+//    });
+//    return priorityFiles;
+//  }
+
   /**
    * Handle a [request] that was read from the communication channel.
    */
   void handleRequest(Request request) {
     _performance.logRequest(request);
     runZoned(() {
       ServerPerformanceStatistics.serverRequests.makeCurrentWhile(() {
         int count = handlers.length;
         for (int i = 0; i < count; i++) {
           try {
@@ skipping 164 matching lines @@
       for (AnalysisContext context in _getContexts(roots)) {
         operationQueue.contextRemoved(context);
       }
     }
     // Instruct the contextDirectoryManager to rebuild all contexts from
     // scratch.
     contextManager.refresh(roots);
   }
 
   /**
+   * Schedule cache consistency validation in [context].
+   * The most of the validation must be done asynchronously.
+   */
+  void scheduleCacheConsistencyValidation(AnalysisContext context) {
+    if (context is InternalAnalysisContext) {
+      CacheConsistencyValidator validator = context.cacheConsistencyValidator;
+      List<Source> sources = validator.getSourcesToComputeModificationTimes();
+      // Compute modification times and notify the validator asynchronously.
+      new Future(() async {
+        try {
+          List<int> modificationTimes =
+              await resourceProvider.getModificationTimes(sources);
+          bool cacheInconsistencyFixed = validator
+              .sourceModificationTimesComputed(sources, modificationTimes);
+          if (cacheInconsistencyFixed) {
+            scheduleOperation(new PerformAnalysisOperation(context, false));
+          }
+        } catch (exception, stackTrace) {
+          sendServerErrorNotification(
+              'Failed to check cache consistency', exception, stackTrace);
+        }
+      });
+    }
+  }
+
+  /**
    * Schedules execution of the given [ServerOperation].
    */
   void scheduleOperation(ServerOperation operation) {
     addOperation(operation);
     _schedulePerformOperation();
   }
 
   /**
    * Schedules analysis of the given context.
    */
@@ skipping 822 matching lines @@
   /**
    * The [PerformanceTag] for time spent in server request handlers.
    */
   static PerformanceTag serverRequests = new PerformanceTag('serverRequests');
 
   /**
    * The [PerformanceTag] for time spent in split store microtasks.
    */
   static PerformanceTag splitStore = new PerformanceTag('splitStore');
 }