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// Copyright 2013 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 "mojo/shell/service_manager.h"
#include "base/bind.h"
#include "base/callback_helpers.h"
#include "base/command_line.h"
#include "base/file_util.h"
#include "base/scoped_native_library.h"
#include "base/threading/simple_thread.h"
#include "mojo/public/bindings/lib/remote_ptr.h"
#include "mojo/shell/context.h"
#include "mojo/shell/switches.h"
#include "mojom/shell.h"
typedef MojoResult (*MojoMainFunction)(MojoHandle pipe);
namespace mojo {
namespace shell {
class ServiceManager::Service : public ShellStub {
public:
Service(ServiceManager* manager, const GURL& url)
: manager_(manager),
url_(url) {
MessagePipe pipe;
shell_client_.reset(pipe.handle0.Pass());
shell_client_.SetPeer(this);
manager_->GetLoaderForURL(url)->Load(url, manager_, pipe.handle1.Pass());
}
virtual ~Service() {}
void ConnectToClient(ScopedMessagePipeHandle handle) {
if (handle.is_valid())
shell_client_->AcceptConnection(handle.Pass());
}
virtual void Connect(const String& url,
ScopedMessagePipeHandle client_pipe) MOJO_OVERRIDE {
manager_->Connect(GURL(url.To<std::string>()), client_pipe.Pass());
}
private:
ServiceManager* manager_;
GURL url_;
RemotePtr<ShellClient> shell_client_;
DISALLOW_COPY_AND_ASSIGN(Service);
};
class ServiceManager::DynamicLoader : public ServiceManager::Loader {
public:
explicit DynamicLoader(ServiceManager* manager) : manager_(manager) {}
virtual ~DynamicLoader() {}
private:
class Context : public mojo::shell::Loader::Delegate,
public base::DelegateSimpleThread::Delegate {
public:
Context(DynamicLoader* loader,
const GURL& url,
ScopedMessagePipeHandle service_handle)
: loader_(loader),
url_(url),
service_handle_(service_handle.Pass()),
weak_factory_(this) {
url_ = url;
if (url.scheme() == "mojo") {
const CommandLine& command_line = *CommandLine::ForCurrentProcess();
std::string origin =
command_line.GetSwitchValueASCII(switches::kOrigin);
#if defined(OS_WIN)
std::string lib(url.ExtractFileName() + ".dll");
#elif defined(OS_LINUX)
std::string lib("lib" + url.ExtractFileName() + ".so");
#elif defined(OS_MACOSX)
std::string lib("lib" + url.ExtractFileName() + ".dylib");
#else
std::string lib;
NOTREACHED() << "dynamic loading of services not supported";
return;
#endif
url_ = GURL(origin + std::string("/") + lib);
}
request_ = loader_->manager_->context_->loader()->Load(url_, this);
}
private:
friend class base::WeakPtrFactory<Context>;
// From Loader::Delegate.
virtual void DidCompleteLoad(const GURL& app_url,
const base::FilePath& app_path) OVERRIDE {
app_path_ = app_path;
ack_closure_ =
base::Bind(&ServiceManager::DynamicLoader::Context::AppCompleted,
weak_factory_.GetWeakPtr());
thread_.reset(new base::DelegateSimpleThread(this, "app_thread"));
thread_->Start();
}
// From base::DelegateSimpleThread::Delegate.
virtual void Run() OVERRIDE {
base::ScopedClosureRunner app_deleter(
base::Bind(base::IgnoreResult(&base::DeleteFile), app_path_, false));
std::string load_error;
base::ScopedNativeLibrary app_library(
base::LoadNativeLibrary(app_path_, &load_error));
if (!app_library.is_valid()) {
LOG(ERROR) << "Failed to load library: " << app_path_.value().c_str();
LOG(ERROR) << "error: " << load_error;
return;
}
MojoMainFunction main_function = reinterpret_cast<MojoMainFunction>(
app_library.GetFunctionPointer("MojoMain"));
if (!main_function) {
LOG(ERROR) << "Entrypoint MojoMain not found.";
return;
}
MojoHandle handle = service_handle_.release().value();
// |MojoMain()| takes ownership of the app handle.
MojoResult result = main_function(handle);
if (result < MOJO_RESULT_OK) {
LOG(ERROR) << "MojoMain returned an error: " << result;
return;
}
loader_->manager_->context_->task_runners()->ui_runner()->PostTask(
FROM_HERE,
ack_closure_);
}
void AppCompleted() {
thread_->Join();
thread_.reset();
loader_->url_to_context_.erase(url_);
delete this;
}
DynamicLoader* loader_;
GURL url_;
base::FilePath app_path_;
base::Closure ack_closure_;
scoped_ptr<mojo::shell::Loader::Job> request_;
scoped_ptr<base::DelegateSimpleThread> thread_;
ScopedMessagePipeHandle service_handle_;
base::WeakPtrFactory<Context> weak_factory_;
};
virtual void Load(const GURL& url,
ServiceManager* manager,
ScopedMessagePipeHandle service_handle)
MOJO_OVERRIDE {
DCHECK(url_to_context_.find(url) == url_to_context_.end());
url_to_context_[url] = new Context(this, url, service_handle.Pass());
}
typedef std::map<GURL, Context*> ContextMap;
ContextMap url_to_context_;
ServiceManager* manager_;
};
ServiceManager::Loader::Loader() {}
ServiceManager::Loader::~Loader() {}
ServiceManager::ServiceManager(Context* context)
: context_(context),
default_loader_(new DynamicLoader(this)) {
}
ServiceManager::~ServiceManager() {
}
void ServiceManager::SetLoaderForURL(Loader* loader, const GURL& gurl) {
DCHECK(url_to_loader_.find(gurl) == url_to_loader_.end());
url_to_loader_[gurl] = loader;
}
ServiceManager::Loader* ServiceManager::GetLoaderForURL(const GURL& gurl) {
LoaderMap::const_iterator it = url_to_loader_.find(gurl);
if (it != url_to_loader_.end())
return it->second;
return default_loader_.get();
}
void ServiceManager::Connect(const GURL& url,
ScopedMessagePipeHandle client_handle) {
ServiceMap::const_iterator service_it = url_to_service_.find(url);
Service* service;
if (service_it != url_to_service_.end()) {
service = service_it->second;
} else {
service = new Service(this, url);
url_to_service_[url] = service;
}
service->ConnectToClient(client_handle.Pass());
}
} // namespace shell
} // namespace mojo
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