chrome/browser/feedback/system_logs/system_logs_fetcher_base.cc

   1 // Copyright 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 #include "chrome/browser/feedback/system_logs/system_logs_fetcher_base.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "content/public/browser/browser_thread.h"
  10
  11 using content::BrowserThread;
  12
  13 namespace system_logs {
  14
  15 SystemLogsFetcherBase::SystemLogsFetcherBase()
  16     : response_(new SystemLogsResponse),
  17       num_pending_requests_(0) {
  18 }
  19
  20 SystemLogsFetcherBase::~SystemLogsFetcherBase() {}
  21
  22 void SystemLogsFetcherBase::Fetch(const SysLogsFetcherCallback& callback) {
  23   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  24   DCHECK(callback_.is_null());
  25   DCHECK(!callback.is_null());
  26
  27   callback_ = callback;
  28   for (size_t i = 0; i < data_sources_.size(); ++i) {
  29     data_sources_[i]->Fetch(base::Bind(&SystemLogsFetcherBase::AddResponse,
  30                                        AsWeakPtr()));
  31   }
  32 }
  33
  34 void SystemLogsFetcherBase::AddResponse(SystemLogsResponse* response) {
  35   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  36
  37   for (SystemLogsResponse::const_iterator it = response->begin();
  38        it != response->end();
  39        ++it) {
  40     // It is an error to insert an element with a pre-existing key.
  41     bool ok = response_->insert(*it).second;
  42     DCHECK(ok) << "Duplicate key found: " << it->first;
  43   }
  44
  45   --num_pending_requests_;
  46   if (num_pending_requests_ > 0)
  47     return;
  48
  49   callback_.Run(response_.Pass());
  50   BrowserThread::DeleteSoon(BrowserThread::UI, FROM_HERE, this);
  51 }
  52
  53 }  // namespace system_logs