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// Copyright 2019 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 SERVICES_SERVICE_MANAGER_PUBLIC_CPP_STANDALONE_CONNECTOR_IMPL_H_
#define SERVICES_SERVICE_MANAGER_PUBLIC_CPP_STANDALONE_CONNECTOR_IMPL_H_
#include "base/component_export.h"
#include "base/macros.h"
#include "mojo/public/cpp/bindings/generic_pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver_set.h"
#include "services/service_manager/public/mojom/connector.mojom.h"
namespace service_manager {
// StandaloneConnectorImpl is a helper class which can be used to provide a
// backend for |Connector| objects to route requests somewhere other than the
// Service Manager.
//
// This exists to aid in transitioning code away from Service Manager APIs.
// Typically an instance of this class would live in the browser process, with a
// Delegate implementation that knows how to bind any interfaces that its
// clients might request.
class COMPONENT_EXPORT(SERVICE_MANAGER_CPP) StandaloneConnectorImpl
: private mojom::Connector {
public:
class Delegate {
public:
virtual ~Delegate() {}
// Invoked whenever a client asks to have an interface bound by the service
// named |service_name|. The interface endpoint to bind is contained in
// |receiver|.
virtual void OnConnect(const std::string& service_name,
mojo::GenericPendingReceiver receiver) = 0;
};
explicit StandaloneConnectorImpl(Delegate* delegate);
StandaloneConnectorImpl(const StandaloneConnectorImpl&) = delete;
StandaloneConnectorImpl& operator=(const StandaloneConnectorImpl&) = delete;
~StandaloneConnectorImpl() override;
// Produces a new remote Connector endpoint whose connection requests are
// routed to this object's Delegate. The returned PendingRemote can be passed
// around in messages, and it can eventually be used to construct a new
// concrete Connector object.
//
// Note that Connectors bound to this remote or clones of it will only support
// the basic operations of |BindInterface/Connect()|, and |Clone()|.
mojo::PendingRemote<mojom::Connector> MakeRemote();
private:
// mojom::Connector implementation:
void BindInterface(const ServiceFilter& filter,
const std::string& interface_name,
mojo::ScopedMessagePipeHandle interface_pipe,
mojom::BindInterfacePriority priority,
BindInterfaceCallback callback) override;
void QueryService(const std::string& service_name,
QueryServiceCallback callback) override;
void WarmService(const ServiceFilter& filter,
WarmServiceCallback callback) override;
void RegisterServiceInstance(
const Identity& identity,
mojo::ScopedMessagePipeHandle service_pipe,
mojo::PendingReceiver<mojom::ProcessMetadata> metadata_receiver,
RegisterServiceInstanceCallback callback) override;
void Clone(mojo::PendingReceiver<mojom::Connector> receiver) override;
Delegate* const delegate_;
mojo::ReceiverSet<mojom::Connector> receivers_;
};
} // namespace service_manager
#endif // SERVICES_SERVICE_MANAGER_PUBLIC_CPP_STANDALONE_CONNECTOR_IMPL_H_
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