Add ServerOperation and queue.

pkg/analysis_server/lib/src/domain_context.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.context;
-
-import 'package:analysis_server/src/analysis_server.dart';
-import 'package:analysis_server/src/constants.dart';
-import 'package:analysis_server/src/protocol.dart';
-import 'package:analyzer/src/generated/engine.dart';
-import 'package:analyzer/src/generated/source.dart';
-
-/**
- * Instances of the class [ContextDomainHandler] implement a [RequestHandler]
- * that handles requests in the context domain.
- *
- * TODO(scheglov) this class is replaces with [AnalysisDomainHandler].
- */
-class ContextDomainHandler implements RequestHandler {
-  /**
-   * 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].
-   */
-  ContextDomainHandler(this.server);
-
-  @override
-  Response handleRequest(Request request) {
-    try {
-      String requestName = request.method;
-      if (requestName == APPLY_CHANGES_NAME) {
-        return applyChanges(request);
-      } else if (requestName == GET_FIXES_NAME) {
-        return getFixes(request);
-      } else if (requestName == SET_OPTIONS_NAME) {
-        return setOptions(request);
-      } else if (requestName == SET_PRIORITY_SOURCES_NAME) {
-        return setPrioritySources(request);
-      }
-    } on RequestFailure catch (exception) {
-      return exception.response;
-    }
-    return null;
-  }
-
-  /**
-   * Inform the specified context that the changes encoded in the change set
-   * have been made. Any invalidated analysis results will be flushed from the
-   * context.
-   */
-  Response applyChanges(Request request) {
-    AnalysisContext context = getAnalysisContext(request);
-    RequestDatum changesData = request.getRequiredParameter(CHANGES_PARAM);
-    ChangeSet changeSet = createChangeSet(
-        request,
-        context.sourceFactory,
-        changesData);
-
-    context.applyChanges(changeSet);
-    server.addContextToWorkQueue(context);
-    Response response = new Response(request.id);
-    return response;
-  }
-
-  /**
-   * Convert the given JSON object into a [ChangeSet], using the given
-   * [sourceFactory] to convert the embedded strings into sources.
-   */
-  ChangeSet createChangeSet(Request request, SourceFactory sourceFactory,
-                            RequestDatum jsonData) {
-    ChangeSet changeSet = new ChangeSet();
-    if (jsonData.hasKey(ADDED)) {
-      convertSources(request, sourceFactory, jsonData[ADDED], (Source source) {
-        changeSet.addedSource(source);
-      });
-    }
-    if (jsonData.hasKey(MODIFIED_PARAM)) {
-      convertSources(request, sourceFactory, jsonData[MODIFIED_PARAM], (Source source) {
-        changeSet.changedSource(source);
-      });
-    }
-    if (jsonData.hasKey(REMOVED)) {
-      convertSources(request, sourceFactory, jsonData[REMOVED], (Source source) {
-        changeSet.removedSource(source);
-      });
-    }
-    return changeSet;
-  }
-
-  /**
-   * If the given [sources] is a list of strings, use the given [sourceFactory]
-   * to convert each string into a source and pass the source to the given
-   * [handler]. Otherwise, throw an exception indicating that the data in the
-   * request was not valid.
-   */
-  void convertSources(Request request, SourceFactory sourceFactory, RequestDatum sources, void handler(Source source)) {
-    convertToSources(sourceFactory, sources.asStringList()).forEach(handler);
-  }
-
-  /**
-   * Return the list of fixes that are available for problems related to the
-   * given error in the specified context.
-   */
-  Response getFixes(Request request) {
-    // TODO(brianwilkerson) Implement this.
-    Response response = new Response(request.id);
-    return response;
-  }
-
-  /**
-   * Set the options controlling analysis within a context to the given set of
-   * options.
-   */
-  Response setOptions(Request request) {
-    AnalysisContext context = getAnalysisContext(request);
-
-    context.analysisOptions = createAnalysisOptions(request);
-    Response response = new Response(request.id);
-    return response;
-  }
-
-  /**
-   * Return the set of analysis options associated with the given [request], or
-   * throw a [RequestFailure] exception if the analysis options are not valid.
-   */
-  AnalysisOptions createAnalysisOptions(Request request) {
-    RequestDatum optionsData = request.getRequiredParameter(OPTIONS);
-    AnalysisOptionsImpl options = new AnalysisOptionsImpl();
-    optionsData.forEachMap((String key, RequestDatum value) {
-      if (key == CACHE_SIZE_OPTION) {
-        options.cacheSize = value.asInt();
-      } else if (key == GENERATE_HINTS_OPTION) {
-        options.hint = value.asBool();
-      } else if (key == GENERATE_DART2JS_OPTION) {
-        options.dart2jsHint = value.asBool();
-      } else if (key == PROVIDE_ERRORS_OPTION) {
-//        options.provideErrors = value.asBool();
-      } else if (key == PROVIDE_NAVIGATION_OPTION) {
-//        options.provideNavigation = value.asBool();
-      } else if (key == PROVIDE_OUTLINE_OPTION) {
-//        options.provideOutline = value.asBool();
-      } else {
-        throw new RequestFailure(new Response.unknownAnalysisOption(request, key));
-      }
-    });
-    return options;
-  }
-
-  /**
-   * Set the priority sources in the specified context to the sources in the
-   * given array.
-   */
-  Response setPrioritySources(Request request) {
-    AnalysisContext context = getAnalysisContext(request);
-    List<String> sourcesData = request.getRequiredParameter(SOURCES_PARAM).asStringList();
-    List<Source> sources = convertToSources(context.sourceFactory, sourcesData);
-
-    context.analysisPriorityOrder = sources;
-    Response response = new Response(request.id);
-    return response;
-  }
-
-  /**
-   * Convert the given list of strings into a list of sources owned by the given
-   * [sourceFactory].
-   */
-  List<Source> convertToSources(SourceFactory sourceFactory, List<String> sourcesData) {
-    List<Source> sources = new List<Source>();
-    sourcesData.forEach((String string) {
-      sources.add(sourceFactory.fromEncoding(string));
-    });
-    return sources;
-  }
-
-  /**
-   * Return the analysis context specified by the given request, or throw a
-   * [RequestFailure] exception if either there is no specified context or if
-   * the specified context does not exist.
-   */
-  AnalysisContext getAnalysisContext(Request request) {
-    // TODO(scheglov) remove it after migrating to the new API
-    return null;
-//    String contextId = request.getRequiredParameter(CONTEXT_ID_PARAM).asString();
-//    AnalysisContext context = server.contextMap[contextId];
-//    if (context == null) {
-//      throw new RequestFailure(new Response.contextDoesNotExist(request));
-//    }
-//    return context;
-  }
-}