src/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 SystemLogsSource::SystemLogsSource(const std::string& source_name)
  16     : source_name_(source_name) {
  17 }
  18
  19 SystemLogsSource::~SystemLogsSource() {
  20 }
  21
  22 SystemLogsFetcherBase::SystemLogsFetcherBase()
  23     : response_(new SystemLogsResponse),
  24       num_pending_requests_(0) {
  25 }
  26
  27 SystemLogsFetcherBase::~SystemLogsFetcherBase() {}
  28
  29 void SystemLogsFetcherBase::Fetch(const SysLogsFetcherCallback& callback) {
  30   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  31   DCHECK(callback_.is_null());
  32   DCHECK(!callback.is_null());
  33
  34   callback_ = callback;
  35   for (size_t i = 0; i < data_sources_.size(); ++i) {
  36     VLOG(1) << "Fetching SystemLogSource: " << data_sources_[i]->source_name();
  37     data_sources_[i]->Fetch(base::Bind(&SystemLogsFetcherBase::AddResponse,
  38                                        AsWeakPtr(),
  39                                        data_sources_[i]->source_name()));
  40   }
  41 }
  42
  43 void SystemLogsFetcherBase::AddResponse(const std::string& source_name,
  44                                         SystemLogsResponse* response) {
  45   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  46
  47   VLOG(1) << "Received SystemLogSource: " << source_name;
  48
  49   for (SystemLogsResponse::const_iterator it = response->begin();
  50        it != response->end();
  51        ++it) {
  52     // It is an error to insert an element with a pre-existing key.
  53     bool ok = response_->insert(*it).second;
  54     DCHECK(ok) << "Duplicate key found: " << it->first;
  55   }
  56
  57   --num_pending_requests_;
  58   if (num_pending_requests_ > 0)
  59     return;
  60
  61   callback_.Run(response_.Pass());
  62   BrowserThread::DeleteSoon(BrowserThread::UI, FROM_HERE, this);
  63 }
  64
  65 }  // namespace system_logs