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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.
#ifndef SERVICES_SHELL_SERVICE_MANAGER_H_
#define SERVICES_SHELL_SERVICE_MANAGER_H_
#include <map>
#include <memory>
#include <vector>
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "mojo/public/cpp/bindings/binding_set.h"
#include "mojo/public/cpp/bindings/interface_ptr_set.h"
#include "services/shell/connect_params.h"
#include "services/shell/native_runner.h"
#include "services/shell/public/cpp/capabilities.h"
#include "services/shell/public/cpp/identity.h"
#include "services/shell/public/cpp/interface_factory.h"
#include "services/shell/public/cpp/service.h"
#include "services/shell/public/interfaces/connector.mojom.h"
#include "services/shell/public/interfaces/interface_provider.mojom.h"
#include "services/shell/public/interfaces/resolver.mojom.h"
#include "services/shell/public/interfaces/service.mojom.h"
#include "services/shell/public/interfaces/service_factory.mojom.h"
#include "services/shell/public/interfaces/service_manager.mojom.h"
namespace shell {
class ShellConnection;
// Creates an identity for the Service Manager, used when the Service Manager
// connects to services.
Identity CreateServiceManagerIdentity();
class ServiceManager : public Service {
public:
// API for testing.
class TestAPI {
public:
explicit TestAPI(ServiceManager* service_manager);
~TestAPI();
// Returns true if there is a Instance for this name.
bool HasRunningInstanceForName(const std::string& name) const;
private:
ServiceManager* service_manager_;
DISALLOW_COPY_AND_ASSIGN(TestAPI);
};
// |native_runner_factory| is an instance of an object capable of vending
// implementations of NativeRunner, e.g. for in or out-of-process execution.
// See native_runner.h and RunNativeApplication().
// |file_task_runner| provides access to a thread to perform file copy
// operations on.
ServiceManager(std::unique_ptr<NativeRunnerFactory> native_runner_factory,
mojom::ServicePtr catalog);
~ServiceManager() override;
// Provide a callback to be notified whenever an instance is destroyed.
// Typically the creator of the Service Manager will use this to determine
// when some set of services it created are destroyed, so it can shut down.
void SetInstanceQuitCallback(base::Callback<void(const Identity&)> callback);
// Completes a connection between a source and target application as defined
// by |params|, exchanging InterfaceProviders between them. If no existing
// instance of the target application is running, one will be loaded.
void Connect(std::unique_ptr<ConnectParams> params);
// Creates a new Instance identified as |name|. This is intended for use by
// the Service Manager's embedder to register itself. This must only be called
// once.
mojom::ServiceRequest StartEmbedderService(const std::string& name);
private:
class Instance;
// Service:
bool OnConnect(Connection* connection) override;
void InitCatalog(mojom::ServicePtr catalog);
// Returns the resolver to use for the specified identity.
// NOTE: Resolvers are cached to ensure we service requests in order. If
// we use a separate Resolver for each request ordering is not
// guaranteed and can lead to random flake.
mojom::Resolver* GetResolver(const Identity& identity);
// Destroys all Service Manager-ends of connections established with Services.
// Services connected by this Service Manager will observe pipe errors and
// have a chance to shut down.
void TerminateServiceManagerConnections();
// Removes a Instance when it encounters an error.
void OnInstanceError(Instance* instance);
// Completes a connection between a source and target application as defined
// by |params|, exchanging InterfaceProviders between them. If no existing
// instance of the target application is running, one will be loaded.
//
// If |service| is not null, there must not be an instance of the target
// application already running. The Service Manager will create a new instance
// and use |service| to control it.
void Connect(std::unique_ptr<ConnectParams> params,
mojom::ServicePtr service);
// Returns a running instance matching |identity|. This might be an instance
// running as a different user if one is available that services all users.
Instance* GetExistingInstance(const Identity& identity) const;
void NotifyPIDAvailable(uint32_t id, base::ProcessId pid);
// Attempt to complete the connection requested by |params| by connecting to
// an existing instance. If there is an existing instance, |params| is taken,
// and this function returns true.
bool ConnectToExistingInstance(std::unique_ptr<ConnectParams>* params);
Instance* CreateInstance(const Identity& source,
const Identity& target,
const CapabilitySpec& spec);
// Called from the instance implementing mojom::ServiceManager.
void AddListener(mojom::ServiceManagerListenerPtr listener);
void CreateServiceWithFactory(const Identity& service_factory,
const std::string& name,
mojom::ServiceRequest request);
// Returns a running ServiceFactory for |service_factory_identity|.
// If there is not one running one is started for |source_identity|.
mojom::ServiceFactory* GetServiceFactory(
const Identity& service_factory_identity);
void OnServiceFactoryLost(const Identity& which);
// Callback when remote Catalog resolves mojo:foo to mojo:bar.
// |params| are the params passed to Connect().
// |service| if provided is a ServicePtr which should be used to manage the
// new application instance. This may be null.
// |result| contains the result of the resolve operation.
void OnGotResolvedName(std::unique_ptr<ConnectParams> params,
mojom::ServicePtr service,
mojom::ResolveResultPtr result);
base::WeakPtr<ServiceManager> GetWeakPtr();
std::map<Identity, Instance*> identity_to_instance_;
// Tracks the names of instances that are allowed to field connection requests
// from all users.
std::set<std::string> singletons_;
std::map<Identity, mojom::ServiceFactoryPtr> service_factories_;
std::map<Identity, mojom::ResolverPtr> identity_to_resolver_;
mojo::InterfacePtrSet<mojom::ServiceManagerListener> listeners_;
base::Callback<void(const Identity&)> instance_quit_callback_;
std::unique_ptr<NativeRunnerFactory> native_runner_factory_;
std::unique_ptr<ShellConnection> shell_connection_;
base::WeakPtrFactory<ServiceManager> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(ServiceManager);
};
mojom::Connector::ConnectCallback EmptyConnectCallback();
} // namespace shell
#endif // SERVICES_SHELL_SERVICE_MANAGER_H_