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// Copyright 2014 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 <string>
#include <vector>
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
class GURL;
namespace base {
class SingleThreadTaskRunner;
class SequencedTaskRunner;
class Version;
namespace net {
class URLRequestContextGetter;
namespace update_client {
class OutOfProcessPatcher;
// Controls the component updater behavior.
// TODO(sorin): this class will be split soon in two. One class controls
// the behavior of the update client, and the other class controls the
// behavior of the component updater.
class Configurator : public base::RefCountedThreadSafe<Configurator> {
// Delay in seconds from calling Start() to the first update check.
virtual int InitialDelay() const = 0;
// Delay in seconds to every subsequent update check. 0 means don't check.
virtual int NextCheckDelay() const = 0;
// Delay in seconds from each task step. Used to smooth out CPU/IO usage.
virtual int StepDelay() const = 0;
// Minimum delta time in seconds before an on-demand check is allowed
// for the same component.
virtual int OnDemandDelay() const = 0;
// The time delay in seconds between applying updates for different
// components.
virtual int UpdateDelay() const = 0;
// The URLs for the update checks. The URLs are tried in order, the first one
// that succeeds wins.
virtual std::vector<GURL> UpdateUrl() const = 0;
// The URLs for pings. Returns an empty vector if and only if pings are
// disabled. Similarly, these URLs have a fall back behavior too.
virtual std::vector<GURL> PingUrl() const = 0;
// Version of the application. Used to compare the component manifests.
virtual base::Version GetBrowserVersion() const = 0;
// Returns the value we use for the "updaterchannel=" and "prodchannel="
// parameters. Possible return values include: "canary", "dev", "beta", and
// "stable".
virtual std::string GetChannel() const = 0;
// Returns the language for the present locale. Possible return values are
// standard tags for languages, such as "en", "en-US", "de", "fr", "af", etc.
virtual std::string GetLang() const = 0;
// Returns the OS's long name like "Windows", "Mac OS X", etc.
virtual std::string GetOSLongName() const = 0;
// Parameters added to each url request. It can be empty if none are needed.
// The return string must be safe for insertion as an attribute in an
// XML element.
virtual std::string ExtraRequestParams() const = 0;
// The source of contexts for all the url requests.
virtual net::URLRequestContextGetter* RequestContext() const = 0;
// Returns a new out of process patcher. May be NULL for implementations
// that patch in-process.
virtual scoped_refptr<update_client::OutOfProcessPatcher>
CreateOutOfProcessPatcher() const = 0;
// True means that this client can handle delta updates.
virtual bool DeltasEnabled() const = 0;
// True means that the background downloader can be used for downloading
// non on-demand components.
virtual bool UseBackgroundDownloader() const = 0;
// Gets a task runner to a blocking pool of threads suitable for worker jobs.
virtual scoped_refptr<base::SequencedTaskRunner> GetSequencedTaskRunner()
const = 0;
// Gets a task runner for worker jobs guaranteed to run on a single thread.
// This thread must be capable of IO. On Windows, this thread must be
// initialized for use of COM objects.
virtual scoped_refptr<base::SingleThreadTaskRunner>
GetSingleThreadTaskRunner() const = 0;
friend class base::RefCountedThreadSafe<Configurator>;
virtual ~Configurator() {}
} // namespace update_client