Add server and request handlers

pkg/analysis_server/lib/src/domain_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 domain.server;
+
+import 'package:analyzer/src/generated/engine.dart';
+import 'package:analyzer/src/generated/java_io.dart';
+import 'package:analyzer/src/generated/sdk_io.dart';
+import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/src/generated/source_io.dart';
+
+import 'analysis_server.dart';
+import 'protocol.dart';
+
+/**
+ * Instances of the class [ServerDomainHandler] implement a [RequestHandler]
+ * that handles requests in the server domain.
+ */
+class ServerDomainHandler implements RequestHandler {
+  /**
+   * The name of the server.createContext request.
+   */
+  static const String CREATE_CONTEXT_METHOD = 'server.createContext';
+
+  /**
+   * The name of the server.deleteContext request.
+   */
+  static const String DELETE_CONTEXT_METHOD = 'server.deleteContext';
+
+  /**
+   * The name of the server.shutdown request.
+   */
+  static const String SHUTDOWN_METHOD = 'server.shutdown';
+
+  /**
+   * The name of the server.version request.
+   */
+  static const String VERSION_METHOD = 'server.version';
+
+  /**
+   * The name of the contextId parameter.
+   */
+  static const String CONTEXT_ID_PARAM = 'contextId';
+
+  /**
+   * The name of the packageMap parameter.
+   */
+  static const String PACKAGE_MAP_PARAM = 'packageMap';
+
+  /**
+   * The name of the sdkDirectory parameter.
+   */
+  static const String SDK_DIRECTORY_PARAM = 'sdkDirectory';
+
+  /**
+   * The name of the contextId result value.
+   */
+  static const String CONTEXT_ID_RESULT = 'contextId';
+
+  /**
+   * The name of the version result value.
+   */
+  static const String VERSION_RESULT = 'version';
+
+  /**
+   * 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].
+   */
+  ServerDomainHandler(this.server);
+
+  @override
+  Response handleRequest(Request request) {
+    try {
+      String requestName = request.method;
+      if (requestName == CREATE_CONTEXT_METHOD) {
+        createContext(request);
+      } else if (requestName == DELETE_CONTEXT_METHOD) {
+        deleteContext(request);
+      } else if (requestName == SHUTDOWN_METHOD) {
+        shutdown(request);
+      } else if (requestName == VERSION_METHOD) {
+        version(request);

[danrubel, 2014/01/22 01:04:07]

Do these need to return the response that is returned by the method call?

[Brian Wilkerson, 2014/01/24 21:49:27]

Yes, done.

+      }
+    } on RequestFailure catch (exception) {
+      return exception.response;
+    }
+    return null;
+  }
+
+  /**
+   * Create a new context in which analysis can be performed. The context that
+   * is created will persist until server.deleteContext is used to delete it.
+   * Clients, therefore, are responsible for managing the lifetime of contexts.
+   */
+  Response createContext(Request request) {
+    String sdkDirectory = request.getRequiredParameter(SDK_DIRECTORY_PARAM);
+    Map<String, String> packageMap = request.getParameter(PACKAGE_MAP_PARAM);
+
+    String baseContextId = new DateTime.now().millisecondsSinceEpoch.toRadixString(16);
+    String contextId = baseContextId;
+    int index = 1;
+    while (server.contextMap.containsKey(contextId)) {
+      contextId = '$baseContextId-$index';
+    }
+    AnalysisContext context = AnalysisEngine.instance.createAnalysisContext();
+    // TODO(brianwilkerson) Use the information from the request to set the
+    // source factory in the context.
+    context.sourceFactory = new SourceFactory.con2([
+      new DartUriResolver(new DirectoryBasedDartSdk(new JavaFile(sdkDirectory))),
+      new FileUriResolver(),
+      // new PackageUriResolver(),
+    ]);
+    server.contextMap[contextId] = context;
+    
+    Response response = new Response(request.id);
+    response.setResult(CONTEXT_ID_RESULT, contextId);
+    return response;
+  }
+
+  /**
+   * Delete the context with the given id. Future attempts to use the context id
+   * will result in an error being returned.
+   */
+  Response deleteContext(Request request) {
+    String contextId = request.getRequiredParameter(CONTEXT_ID_PARAM);
+
+    AnalysisContext removedContext = server.contextMap.remove(contextId);
+    if (removedContext == null) {
+      return new Response.contextDoesNotExist(request);
+    }
+    Response response = new Response(request.id);
+    return response;
+  }
+
+  /**
+   * Cleanly shutdown the analysis server.
+   */
+  Response shutdown(Request request) {
+    server.running = false;
+    Response response = new Response(request.id);
+    return response;
+  }
+
+  /**
+   * Return the version number of the analysis server.
+   */
+  Response version(Request request) {
+    Response response = new Response(request.id);
+    response.setResult(VERSION_RESULT, '0.0.1');
+    return response;
+  }
+}