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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/sync/util/extensions_activity_monitor.h"
#include "base/task.h"
#include "chrome/browser/extensions/extension_bookmarks_module.h"
#include "chrome/common/extensions/extension.h"
#include "content/browser/browser_thread.h"
#include "content/common/notification_service.h"
namespace browser_sync {
namespace {
// A helper task to register an ExtensionsActivityMonitor as an observer of
// events on the UI thread (even though the monitor may live on another thread).
// This liberates ExtensionsActivityMonitor from having to be ref counted.
class RegistrationTask : public Task {
public:
RegistrationTask(ExtensionsActivityMonitor* monitor,
NotificationRegistrar* registrar)
: monitor_(monitor), registrar_(registrar) {}
virtual ~RegistrationTask() {}
virtual void Run() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
// It would be nice if we could specify a Source for each specific function
// we wanted to observe, but the actual function objects are allocated on
// the fly so there is no reliable object to point to (same problem if we
// wanted to use the string name). Thus, we use all sources and filter in
// Observe.
registrar_->Add(monitor_, NotificationType::EXTENSION_BOOKMARKS_API_INVOKED,
NotificationService::AllSources());
}
private:
ExtensionsActivityMonitor* monitor_;
NotificationRegistrar* registrar_;
DISALLOW_COPY_AND_ASSIGN(RegistrationTask);
};
} // namespace
ExtensionsActivityMonitor::ExtensionsActivityMonitor() {
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
new RegistrationTask(this, ®istrar_));
}
ExtensionsActivityMonitor::~ExtensionsActivityMonitor() {
// In some unrelated unit tests, there is no running UI loop. In this case,
// the PostTask in our ctor will not result in anything running, so |this|
// won't be used for anything. In this case (or whenever no registration took
// place) and only this case we allow destruction on another loop, but this
// isn't something a client of this class can control; it happens implicitly
// by not having a running UI thread.
if (!registrar_.IsEmpty()) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
// The registrar calls RemoveAll in its dtor (which would happen in a
// moment but explicitly call this so it is clear why we need to be on the
// ui_loop_.
registrar_.RemoveAll();
}
}
void ExtensionsActivityMonitor::GetAndClearRecords(Records* buffer) {
base::AutoLock lock(records_lock_);
buffer->clear();
buffer->swap(records_);
}
void ExtensionsActivityMonitor::PutRecords(const Records& records) {
base::AutoLock lock(records_lock_);
for (Records::const_iterator i = records.begin(); i != records.end(); ++i) {
records_[i->first].extension_id = i->second.extension_id;
records_[i->first].bookmark_write_count += i->second.bookmark_write_count;
}
}
void ExtensionsActivityMonitor::Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
base::AutoLock lock(records_lock_);
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
const Extension* extension = Source<const Extension>(source).ptr();
const BookmarksFunction* f = Details<const BookmarksFunction>(details).ptr();
if (f->name() == "bookmarks.update" ||
f->name() == "bookmarks.move" ||
f->name() == "bookmarks.create" ||
f->name() == "bookmarks.removeTree" ||
f->name() == "bookmarks.remove") {
Record& record = records_[extension->id()];
record.extension_id = extension->id();
record.bookmark_write_count++;
}
}
} // namespace browser_sync
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