chrome/service/cloud_print/job_status_updater.cc

   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 #include "chrome/service/cloud_print/job_status_updater.h"
   6
   7 #include "base/bind.h"
   8 #include "base/json/json_reader.h"
   9 #include "base/metrics/histogram.h"
  10 #include "base/strings/string_util.h"
  11 #include "base/strings/utf_string_conversions.h"
  12 #include "base/values.h"
  13 #include "chrome/common/cloud_print/cloud_print_constants.h"
  14 #include "chrome/service/cloud_print/cloud_print_service_helpers.h"
  15 #include "url/gurl.h"
  16
  17 namespace cloud_print {
  18
  19 namespace {
  20
  21 bool IsTerminalJobState(PrintJobStatus status) {
  22   return status == PRINT_JOB_STATUS_ERROR ||
  23          status == PRINT_JOB_STATUS_COMPLETED;
  24 }
  25
  26 }  // namespace
  27
  28 JobStatusUpdater::JobStatusUpdater(const std::string& printer_name,
  29                                    const std::string& job_id,
  30                                    PlatformJobId& local_job_id,
  31                                    const GURL& cloud_print_server_url,
  32                                    PrintSystem* print_system,
  33                                    Delegate* delegate)
  34     : start_time_(base::Time::Now()),
  35       printer_name_(printer_name),
  36       job_id_(job_id),
  37       local_job_id_(local_job_id),
  38       cloud_print_server_url_(cloud_print_server_url),
  39       print_system_(print_system),
  40       delegate_(delegate),
  41       stopped_(false) {
  42   DCHECK(delegate_);
  43 }
  44
  45 // Start checking the status of the local print job.
  46 void JobStatusUpdater::UpdateStatus() {
  47   // It does not matter if we had already sent out an update and are waiting for
  48   // a response. This is a new update and we will simply cancel the old request
  49   // and send a new one.
  50   if (!stopped_) {
  51     bool need_update = false;
  52     // If the job has already been completed, we just need to update the server
  53     // with that status. The *only* reason we would come back here in that case
  54     // is if our last server update attempt failed.
  55     if (IsTerminalJobState(last_job_details_.status)) {
  56       need_update = true;
  57     } else {
  58       PrintJobDetails details;
  59       if (print_system_->GetJobDetails(printer_name_, local_job_id_,
  60                                        &details)) {
  61         if (details != last_job_details_) {
  62           last_job_details_ = details;
  63           need_update = true;
  64         }
  65       } else {
  66         // If GetJobDetails failed, the most likely case is that the job no
  67         // longer exists in the OS queue. We are going to assume it is done in
  68         // this case.
  69         last_job_details_.Clear();
  70         last_job_details_.status = PRINT_JOB_STATUS_COMPLETED;
  71         need_update = true;
  72       }
  73       UMA_HISTOGRAM_ENUMERATION("CloudPrint.NativeJobStatus",
  74                                 last_job_details_.status, PRINT_JOB_STATUS_MAX);
  75     }
  76     if (need_update) {
  77       request_ = CloudPrintURLFetcher::Create();
  78       request_->StartGetRequest(
  79           CloudPrintURLFetcher::REQUEST_UPDATE_JOB,
  80           GetUrlForJobStatusUpdate(
  81               cloud_print_server_url_, job_id_, last_job_details_),
  82           this,
  83           kCloudPrintAPIMaxRetryCount,
  84           std::string());
  85     }
  86   }
  87 }
  88
  89 void JobStatusUpdater::Stop() {
  90   request_ = NULL;
  91   DCHECK(delegate_);
  92   stopped_ = true;
  93   delegate_->OnJobCompleted(this);
  94 }
  95
  96 // CloudPrintURLFetcher::Delegate implementation.
  97 CloudPrintURLFetcher::ResponseAction JobStatusUpdater::HandleJSONData(
  98       const net::URLFetcher* source,
  99       const GURL& url,
 100       base::DictionaryValue* json_data,
 101       bool succeeded) {
 102   if (IsTerminalJobState(last_job_details_.status)) {
 103     base::MessageLoop::current()->PostTask(
 104         FROM_HERE, base::Bind(&JobStatusUpdater::Stop, this));
 105   }
 106   return CloudPrintURLFetcher::STOP_PROCESSING;
 107 }
 108
 109 CloudPrintURLFetcher::ResponseAction JobStatusUpdater::OnRequestAuthError() {
 110   // We got an Auth error and have no idea how long it will take to refresh
 111   // auth information (may take forever). We'll drop current request and
 112   // propagate this error to the upper level. After auth issues will be
 113   // resolved, GCP connector will restart.
 114   if (delegate_)
 115     delegate_->OnAuthError();
 116   return CloudPrintURLFetcher::STOP_PROCESSING;
 117 }
 118
 119 std::string JobStatusUpdater::GetAuthHeader() {
 120   return GetCloudPrintAuthHeaderFromStore();
 121 }
 122
 123 JobStatusUpdater::~JobStatusUpdater() {}
 124
 125 }  // namespace cloud_print