| // 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 server.manager; |
| |
| import 'dart:async'; |
| import 'dart:convert'; |
| import 'dart:io'; |
| |
| import 'package:matcher/matcher.dart'; |
| import 'package:analysis_server/src/protocol.dart'; |
| import 'package:analysis_server/src/channel/channel.dart'; |
| import 'package:analysis_server/src/channel/byte_stream_channel.dart'; |
| |
| part 'logging_client_channel.dart'; |
| |
| /** |
| * The results returned by [ServerManager].analyze(...) once analysis |
| * has finished. |
| */ |
| class AnalysisResults { |
| Duration elapsed; |
| int errorCount = 0; |
| int hintCount = 0; |
| int warningCount = 0; |
| } |
| |
| |
| /** |
| * [CompletionResults] contains the completion results returned by the server |
| * along with the elapse time to receive those completions. |
| */ |
| class CompletionResults { |
| final Duration elapsed; |
| final CompletionResultsParams params; |
| |
| CompletionResults(this.elapsed, this.params); |
| |
| int get suggestionCount => params.results.length; |
| } |
| |
| /** |
| * [Editor] is a virtual editor for inspecting and modifying a file's content |
| * and updating the server with those modifications. |
| */ |
| class Editor { |
| final ServerManager manager; |
| final File file; |
| int offset = 0; |
| String _content = null; |
| |
| Editor(this.manager, this.file); |
| |
| /// Return a future that returns the file content |
| Future<String> get content { |
| if (_content != null) { |
| return new Future.value(_content); |
| } |
| return file.readAsString().then((String content) { |
| _content = content; |
| return _content; |
| }); |
| } |
| |
| /** |
| * Request completion suggestions from the server. |
| * Return a future that completes with the completions sent. |
| */ |
| Future<List<CompletionResults>> getSuggestions() { |
| Request request = new CompletionGetSuggestionsParams( |
| file.path, |
| offset).toRequest(manager._nextRequestId); |
| Stopwatch stopwatch = new Stopwatch()..start(); |
| return manager.channel.sendRequest(request).then((Response response) { |
| String completionId = |
| new CompletionGetSuggestionsResult.fromResponse(response).id; |
| var completer = new Completer<List<CompletionResults>>(); |
| List<CompletionResults> results = []; |
| |
| // Listen for completion suggestions |
| StreamSubscription<Notification> subscription; |
| subscription = |
| manager.channel.notificationStream.listen((Notification notification) { |
| if (notification.event == 'completion.results') { |
| CompletionResultsParams params = |
| new CompletionResultsParams.fromNotification(notification); |
| if (params.id == completionId) { |
| results.add(new CompletionResults(stopwatch.elapsed, params)); |
| if (params.isLast) { |
| stopwatch.stop(); |
| subscription.cancel(); |
| completer.complete(results); |
| } |
| } |
| } |
| }); |
| |
| return completer.future; |
| }); |
| } |
| |
| /** |
| * Move the virtual cursor after the given pattern in the source. |
| * Return a future that completes once the cursor has been moved. |
| */ |
| Future<Editor> moveAfter(String pattern) { |
| return content.then((String content) { |
| offset = content.indexOf(pattern); |
| return this; |
| }); |
| } |
| |
| /** |
| * Replace the specified number of characters at the current cursor location |
| * with the given text, but do not save that content to disk. |
| * Return a future that completes once the server has been notified. |
| */ |
| Future<Editor> replace(int replacementLength, String text) { |
| return content.then((String oldContent) { |
| StringBuffer sb = new StringBuffer(); |
| sb.write(oldContent.substring(0, offset)); |
| sb.write(text); |
| sb.write(oldContent.substring(offset)); |
| _content = sb.toString(); |
| SourceEdit sourceEdit = new SourceEdit(offset, replacementLength, text); |
| Request request = new AnalysisUpdateContentParams({ |
| file.path: new ChangeContentOverlay([sourceEdit]) |
| }).toRequest(manager._nextRequestId); |
| offset += text.length; |
| return manager.channel.sendRequest(request).then((Response response) { |
| return this; |
| }); |
| }); |
| } |
| } |
| |
| /** |
| * [ServerManager] is used to launch and manage an analysis server |
| * running in a separate process. |
| */ |
| class ServerManager { |
| |
| /** |
| * The analysis server process being managed or `null` if not started. |
| */ |
| Process process; |
| |
| /** |
| * The root directory containing the Dart source files to be analyzed. |
| */ |
| Directory appDir; |
| |
| /** |
| * The channel used to communicate with the analysis server. |
| */ |
| LoggingClientChannel _channel; |
| |
| /** |
| * The identifier used in the most recent request to the server. |
| * See [_nextRequestId]. |
| */ |
| int _lastRequestId = 0; |
| |
| /** |
| * `true` if a server exception was detected on stderr as opposed to an |
| * exception that the server reported via the server.error notification. |
| */ |
| bool _unreportedServerException = false; |
| |
| /** |
| * `true` if the [stop] method has been called. |
| */ |
| bool _stopRequested = false; |
| |
| /** |
| * Return the channel used to communicate with the analysis server. |
| */ |
| ClientCommunicationChannel get channel => _channel; |
| |
| /** |
| * Return `true` if a server error occurred. |
| */ |
| bool get errorOccurred => |
| _unreportedServerException || (_channel.serverErrorCount > 0); |
| |
| String get _nextRequestId => (++_lastRequestId).toString(); |
| |
| /** |
| * Direct the server to analyze all sources in the given directory, |
| * all sub directories recursively, and any source referenced sources |
| * outside this directory hierarch such as referenced packages. |
| * Return a future that completes when the analysis is finished. |
| */ |
| Future<AnalysisResults> analyze(Directory appDir) { |
| this.appDir = appDir; |
| Stopwatch stopwatch = new Stopwatch()..start(); |
| Request request = new AnalysisSetAnalysisRootsParams( |
| [appDir.path], |
| []).toRequest(_nextRequestId); |
| |
| // Request analysis |
| return channel.sendRequest(request).then((Response response) { |
| AnalysisResults results = new AnalysisResults(); |
| StreamSubscription<Notification> subscription; |
| Completer<AnalysisResults> completer = new Completer<AnalysisResults>(); |
| subscription = |
| channel.notificationStream.listen((Notification notification) { |
| |
| // Gather analysis results |
| if (notification.event == 'analysis.errors') { |
| AnalysisErrorsParams params = |
| new AnalysisErrorsParams.fromNotification(notification); |
| params.errors.forEach((AnalysisError error) { |
| AnalysisErrorSeverity severity = error.severity; |
| if (severity == AnalysisErrorSeverity.ERROR) { |
| results.errorCount += 1; |
| } else if (severity == AnalysisErrorSeverity.WARNING) { |
| results.warningCount += 1; |
| } else if (severity == AnalysisErrorSeverity.INFO) { |
| results.hintCount += 1; |
| } else { |
| print('Unknown error severity: ${severity.name}'); |
| } |
| }); |
| } |
| |
| // Stop gathering once analysis is complete |
| if (notification.event == 'server.status') { |
| ServerStatusParams status = |
| new ServerStatusParams.fromNotification(notification); |
| AnalysisStatus analysis = status.analysis; |
| if (analysis != null && !analysis.isAnalyzing) { |
| stopwatch.stop(); |
| results.elapsed = stopwatch.elapsed; |
| subscription.cancel(); |
| completer.complete(results); |
| } |
| } |
| }); |
| return completer.future; |
| }); |
| } |
| |
| /** |
| * Send a request to the server for its version information |
| * and return a future that completes with the result. |
| */ |
| Future<ServerGetVersionResult> getVersion() { |
| Request request = new ServerGetVersionParams().toRequest(_nextRequestId); |
| return channel.sendRequest(request).then((Response response) { |
| return new ServerGetVersionResult.fromResponse(response); |
| }); |
| } |
| |
| /** |
| * Notify the server that the given file will be edited. |
| * Return a virtual editor for inspecting and modifying the file's content. |
| */ |
| Future<Editor> openFileNamed(String fileName) { |
| return _findFile(fileName, appDir).then((File file) { |
| if (file == null) { |
| throw 'Failed to find file named $fileName in ${appDir.path}'; |
| } |
| file = file.absolute; |
| Request request = |
| new AnalysisSetPriorityFilesParams([file.path]).toRequest(_nextRequestId); |
| return channel.sendRequest(request).then((Response response) { |
| return new Editor(this, file); |
| }); |
| }); |
| } |
| |
| /** |
| * Send a request for notifications. |
| * Return when the server has acknowledged that request. |
| */ |
| Future setSubscriptions() { |
| Request request = new ServerSetSubscriptionsParams( |
| [ServerService.STATUS]).toRequest(_nextRequestId); |
| return channel.sendRequest(request); |
| } |
| |
| /** |
| * Stop the analysis server. |
| * Return a future that completes when the server is terminated. |
| */ |
| Future stop([_]) { |
| _stopRequested = true; |
| print("Requesting server shutdown"); |
| Request request = new ServerShutdownParams().toRequest(_nextRequestId); |
| Duration waitTime = new Duration(seconds: 5); |
| return channel.sendRequest(request).timeout(waitTime, onTimeout: () { |
| print('Expected shutdown response'); |
| }).then((Response response) { |
| return channel.close().then((_) => process.exitCode); |
| }).timeout(new Duration(seconds: 2), onTimeout: () { |
| print('Expected server to shutdown'); |
| process.kill(); |
| }); |
| } |
| |
| /** |
| * Locate the given file in the directory tree. |
| */ |
| Future<File> _findFile(String fileName, Directory appDir) { |
| return appDir.list(recursive: true).firstWhere((FileSystemEntity entity) { |
| return entity is File && entity.path.endsWith(fileName); |
| }); |
| } |
| |
| /** |
| * Launch an analysis server and open a connection to that server. |
| */ |
| Future<ServerManager> _launchServer(String pathToServer) { |
| List<String> serverArgs = [pathToServer]; |
| return Process.start(Platform.executable, serverArgs).catchError((error) { |
| exitCode = 21; |
| throw 'Failed to launch analysis server: $error'; |
| }).then((Process process) { |
| this.process = process; |
| _channel = new LoggingClientChannel( |
| new ByteStreamClientChannel(process.stdout, process.stdin)); |
| |
| // simple out of band exception handling |
| process.stderr.transform( |
| new Utf8Codec().decoder).transform(new LineSplitter()).listen((String line) { |
| if (!_unreportedServerException) { |
| _unreportedServerException = true; |
| stderr.writeln('>>> Unreported server exception'); |
| } |
| stderr.writeln('server.stderr: $line'); |
| }); |
| |
| // watch for unexpected process termination and catch the exit code |
| process.exitCode.then((int code) { |
| if (!_stopRequested) { |
| fail('Unexpected server termination: $code'); |
| } |
| if (code != null && code != 0) { |
| exitCode = code; |
| } |
| print('Server stopped: $code'); |
| }); |
| |
| return channel.notificationStream.first.then((Notification notification) { |
| print('Server connection established'); |
| return setSubscriptions().then((_) { |
| return getVersion().then((ServerGetVersionResult result) { |
| print('Server version ${result.version}'); |
| return this; |
| }); |
| }); |
| }); |
| }); |
| } |
| |
| /** |
| * Launch analysis server in a separate process |
| * and return a future with a manager for that analysis server. |
| */ |
| static Future<ServerManager> start(String serverPath) { |
| return new ServerManager()._launchServer(serverPath); |
| } |
| } |