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// Copyright (c) 2012 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/extensions/api/api_function.h"
#include "base/bind.h"
#include "chrome/browser/extensions/api/api_resource_event_notifier.h"
#include "chrome/browser/profiles/profile.h"
using content::BrowserThread;
namespace extensions {
AsyncApiFunction::AsyncApiFunction()
: work_thread_id_(BrowserThread::IO) {
}
AsyncApiFunction::~AsyncApiFunction() {
}
bool AsyncApiFunction::RunImpl() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (!PrePrepare() || !Prepare()) {
return false;
}
bool rv = BrowserThread::PostTask(
work_thread_id_, FROM_HERE,
base::Bind(&AsyncApiFunction::WorkOnWorkThread, this));
DCHECK(rv);
return true;
}
bool AsyncApiFunction::PrePrepare() {
return true;
}
void AsyncApiFunction::Work() {
}
void AsyncApiFunction::AsyncWorkStart() {
Work();
AsyncWorkCompleted();
}
void AsyncApiFunction::AsyncWorkCompleted() {
if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
bool rv = BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&AsyncApiFunction::RespondOnUIThread, this));
DCHECK(rv);
} else {
SendResponse(Respond());
}
}
void AsyncApiFunction::WorkOnWorkThread() {
DCHECK(BrowserThread::CurrentlyOn(work_thread_id_));
DCHECK(work_thread_id_ != BrowserThread::UI) <<
"You have specified that AsyncApiFunction::Work() should happen on "
"the UI thread. This nullifies the point of this class. Either "
"specify a different thread or derive from a different class.";
AsyncWorkStart();
}
void AsyncApiFunction::RespondOnUIThread() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
SendResponse(Respond());
}
int AsyncApiFunction::ExtractSrcId(const DictionaryValue* options) {
int src_id = -1;
if (options) {
if (options->HasKey(kSrcIdKey))
EXTENSION_FUNCTION_VALIDATE(options->GetInteger(kSrcIdKey, &src_id));
}
return src_id;
}
ApiResourceEventNotifier* AsyncApiFunction::CreateEventNotifier(int src_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
return new ApiResourceEventNotifier(
profile()->GetExtensionEventRouter(), profile(), extension_id(),
src_id, source_url());
}
} // namespace extensions
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