chrome/service/cloud_print/printer_job_queue_handler.h

   1 // Copyright (c) 2013 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 CHROME_SERVICE_CLOUD_PRINT_PRINTER_JOB_QUEUE_HANDLER_H_
   6 #define CHROME_SERVICE_CLOUD_PRINT_PRINTER_JOB_QUEUE_HANDLER_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <utility>
  11 #include <vector>
  12
  13 #include "base/files/file_path.h"
  14 #include "base/memory/ref_counted.h"
  15 #include "base/memory/scoped_ptr.h"
  16 #include "base/memory/weak_ptr.h"
  17 #include "base/time/time.h"
  18 #include "chrome/common/cloud_print/cloud_print_constants.h"
  19
  20 namespace base {
  21   class DictionaryValue;
  22 }
  23
  24 namespace cloud_print {
  25
  26 struct JobDetails {
  27   JobDetails();
  28   ~JobDetails();
  29   void Clear();
  30   static bool ordering(const JobDetails& first, const JobDetails& second);
  31
  32   std::string job_id_;
  33   std::string job_title_;
  34
  35   std::string print_ticket_url_;
  36   std::string print_data_url_;
  37
  38   std::string print_ticket_;
  39   base::FilePath print_data_file_path_;
  40   std::string print_data_mime_type_;
  41
  42   std::vector<std::string> tags_;
  43
  44   base::TimeDelta time_remaining_;
  45 };
  46
  47 // class containing logic for print job backoff
  48
  49 class PrinterJobQueueHandler {
  50  public:
  51   class TimeProvider {
  52    public:
  53     virtual base::Time GetNow() = 0;
  54     virtual ~TimeProvider() {}
  55   };
  56
  57   // PrinterJobQueueHandler takes ownership of |time_provider| and is
  58   // responsible for deleting it.
  59   explicit PrinterJobQueueHandler(TimeProvider* time_provider);
  60   PrinterJobQueueHandler();
  61   ~PrinterJobQueueHandler();
  62
  63   // jobs will be filled with details of all jobs in the queue, sorted by time
  64   // until they are ready to print, lowest to highest. Jobs that are ready to
  65   // print will have a time_remaining_ of 0.
  66   void GetJobsFromQueue(const base::DictionaryValue* json_data,
  67                         std::vector<JobDetails>* jobs);
  68
  69   // Marks a job fetch as failed. Returns "true" if the job will be retried.
  70   bool JobFetchFailed(const std::string& job_id);
  71
  72   void JobDone(const std::string& job_id);
  73
  74  private:
  75   scoped_ptr<TimeProvider> time_provider_;
  76
  77   struct FailedJobMetadata {
  78     int retries_;
  79     base::Time last_retry_;
  80   };
  81
  82   typedef std::map<std::string, FailedJobMetadata> FailedJobMap;
  83   typedef std::pair<std::string, FailedJobMetadata> FailedJobPair;
  84
  85   FailedJobMap failed_job_map_;
  86
  87   void ConstructJobDetailsFromJson(const base::DictionaryValue* json_data,
  88                                    JobDetails* details_obj);
  89   base::TimeDelta ComputeBackoffTime(const std::string& job_id);
  90
  91   DISALLOW_COPY_AND_ASSIGN(PrinterJobQueueHandler);
  92 };
  93
  94 }  // namespace cloud_print
  95
  96 #endif  // CHROME_SERVICE_CLOUD_PRINT_PRINTER_JOB_QUEUE_HANDLER_H_
  97
  98