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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_BROWSER_DEVTOOLS_WORKER_DEVTOOLS_MANAGER_H_
      6 #define CONTENT_BROWSER_DEVTOOLS_WORKER_DEVTOOLS_MANAGER_H_
      7 
      8 #include <list>
      9 #include <map>
     10 #include <string>
     11 
     12 #include "base/basictypes.h"
     13 #include "base/memory/singleton.h"
     14 #include "content/browser/worker_host/worker_process_host.h"
     15 #include "content/common/content_export.h"
     16 
     17 namespace content {
     18 
     19 class DevToolsAgentHost;
     20 
     21 // All methods are supposed to be called on the IO thread.
     22 class WorkerDevToolsManager {
     23  public:
     24   typedef std::pair<int, int> WorkerId;
     25   class WorkerDevToolsAgentHost;
     26 
     27   // Returns the WorkerDevToolsManager singleton.
     28   static WorkerDevToolsManager* GetInstance();
     29 
     30   // Called on the UI thread.
     31   static DevToolsAgentHost* GetDevToolsAgentHostForWorker(
     32       int worker_process_id,
     33       int worker_route_id);
     34 
     35   void ForwardToDevToolsClient(int worker_process_id,
     36                                int worker_route_id,
     37                                const std::string& message);
     38   void SaveAgentRuntimeState(int worker_process_id,
     39                              int worker_route_id,
     40                              const std::string& state);
     41 
     42   // Called on the IO thread.
     43   void WorkerCreated(
     44       WorkerProcessHost* process,
     45       const WorkerProcessHost::WorkerInstance& instance);
     46   void WorkerDestroyed(WorkerProcessHost* process, int worker_route_id);
     47   void WorkerContextStarted(WorkerProcessHost* process, int worker_route_id);
     48 
     49  private:
     50   friend struct DefaultSingletonTraits<WorkerDevToolsManager>;
     51   class DetachedClientHosts;
     52   struct InspectedWorker;
     53   typedef std::list<InspectedWorker> InspectedWorkersList;
     54 
     55   WorkerDevToolsManager();
     56   virtual ~WorkerDevToolsManager();
     57 
     58   void RemoveInspectedWorkerData(const WorkerId& id);
     59   InspectedWorkersList::iterator FindInspectedWorker(int host_id, int route_id);
     60 
     61   void ConnectDevToolsAgentHostToWorker(int worker_process_id,
     62                                         int worker_route_id);
     63   void ForwardToWorkerDevToolsAgent(int worker_process_host_id,
     64                                     int worker_route_id,
     65                                     const IPC::Message& message);
     66   static void ForwardToDevToolsClientOnUIThread(
     67       int worker_process_id,
     68       int worker_route_id,
     69       const std::string& message);
     70   static void SaveAgentRuntimeStateOnUIThread(
     71       int worker_process_id,
     72       int worker_route_id,
     73       const std::string& state);
     74   static void NotifyConnectionFailedOnIOThread(int worker_process_id,
     75                                                int worker_route_id);
     76   static void NotifyConnectionFailedOnUIThread(int worker_process_id,
     77                                                int worker_route_id);
     78   static void SendResumeToWorker(const WorkerId& id);
     79 
     80   InspectedWorkersList inspected_workers_;
     81 
     82   struct TerminatedInspectedWorker;
     83   typedef std::list<TerminatedInspectedWorker> TerminatedInspectedWorkers;
     84   // List of terminated workers for which there may be a devtools client on
     85   // the UI thread. Worker entry is added into this list when inspected worker
     86   // is terminated and will be removed in one of two cases:
     87   // - shared worker with the same URL and name is started(in wich case we will
     88   // try to reattach existing DevTools client to the new worker).
     89   // - DevTools client which was inspecting terminated worker is closed on the
     90   // UI thread and and WorkerDevToolsManager is notified about that on the IO
     91   // thread.
     92   TerminatedInspectedWorkers terminated_workers_;
     93 
     94   typedef std::map<WorkerId, WorkerId> PausedWorkers;
     95   // Map from old to new worker id for the inspected workers that have been
     96   // terminated and started again in paused state. Worker data will be removed
     97   // from this list in one of two cases:
     98   // - DevTools client is closed on the UI thread, WorkerDevToolsManager was
     99   // notified about that on the IO thread and sent "resume" message to the
    100   // worker.
    101   // - Existing DevTools client was reattached to the new worker.
    102   PausedWorkers paused_workers_;
    103 
    104   DISALLOW_COPY_AND_ASSIGN(WorkerDevToolsManager);
    105 };
    106 
    107 }  // namespace content
    108 
    109 #endif  // CONTENT_BROWSER_DEVTOOLS_WORKER_DEVTOOLS_MANAGER_H_
    110