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-rw-r--r--chromium/components/update_client/action.h87
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diff --git a/chromium/components/update_client/action.h b/chromium/components/update_client/action.h
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--- a/chromium/components/update_client/action.h
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-// Copyright 2015 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.
-
-#ifndef COMPONENTS_UPDATE_CLIENT_ACTION_H_
-#define COMPONENTS_UPDATE_CLIENT_ACTION_H_
-
-#include <stddef.h>
-
-#include <string>
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "base/threading/thread_checker.h"
-#include "components/update_client/crx_update_item.h"
-#include "components/update_client/update_client.h"
-
-namespace update_client {
-
-enum class Error;
-struct CrxUpdateItem;
-struct UpdateContext;
-
-// Any update can be broken down as a sequence of discrete steps, such as
-// checking for updates, downloading patches, updating, and waiting between
-// successive updates. An action is the smallest unit of work executed by
-// the update engine.
-//
-// Defines an abstract interface for a unit of work, executed by the
-// update engine as part of an update.
-class Action {
- public:
- virtual ~Action() {}
-
- // Runs the code encapsulated by the action. When an action completes, it can
- // chain up and transfer the execution flow to another action or it can
- // invoke the |callback| when this function has completed and there is nothing
- // else to do.
- virtual void Run(UpdateContext* update_context, Callback callback) = 0;
-};
-
-// Provides a reusable implementation of common functions needed by actions.
-class ActionImpl {
- protected:
- ActionImpl();
- ~ActionImpl();
-
- void Run(UpdateContext* update_context, Callback callback);
-
- // Changes the current state of the |item| to the new state |to|.
- void ChangeItemState(CrxUpdateItem* item, CrxUpdateItem::State to);
-
- // Changes the state of all items in |update_context_|. Returns the count
- // of items affected by the call.
- size_t ChangeAllItemsState(CrxUpdateItem::State from,
- CrxUpdateItem::State to);
-
- // Returns the item associated with the component |id| or nullptr in case
- // of errors.
- CrxUpdateItem* FindUpdateItemById(const std::string& id) const;
-
- void NotifyObservers(UpdateClient::Observer::Events event,
- const std::string& id);
-
- // Updates the CRX at the front of the CRX queue in this update context.
- void UpdateCrx();
-
- // Completes updating the CRX at the front of the queue, and initiates
- // the update for the next CRX in the queue, if the queue is not empty.
- void UpdateCrxComplete(CrxUpdateItem* item);
-
- // Called when the updates for all CRXs have finished and the execution
- // flow must return back to the update engine.
- void UpdateComplete(Error error);
-
- base::ThreadChecker thread_checker_;
-
- UpdateContext* update_context_; // Not owned by this class.
- Callback callback_;
-
- private:
- DISALLOW_COPY_AND_ASSIGN(ActionImpl);
-};
-
-} // namespace update_client
-
-#endif // COMPONENTS_UPDATE_CLIENT_ACTION_H_