Open Harmony——包管理子系统包安装模块源码解析

系统 OpenHarmony
本文主要介绍了包管理子系统的关键实现机制、主要类关系及重要的处理流程,为开发人员维护和扩展功能提供参考。

​想了解更多关于开源的内容,请访问:​

​51CTO 开源基础软件社区​

​https://ost.51cto.com​

简介

包管理子系统负责应用安装包的管理,提供安装包的信息查询、安装、更新、卸载和包信息存储等能力。

包管理子系统架构如下图所示:

Open Harmony——包管理子系统包安装模块源码解析-开源基础软件社区

代码目录

foundation/appexecfwk/standard
├── kits
└── appkit # Appkit实现的核心代码
├── common
└── log # 日志组件目录
├── interfaces
└── innerkits # 内部接口存放目录
├── services
└── bundlemgr # 包管理服务框架代码
└── dbms # 分布式包管理服务框架代码
├── test # 测试目录
└── tools # bm命令存放目录

包安装类间关系及关键类介绍

类图

Open Harmony——包管理子系统包安装模块源码解析-开源基础软件社区

BaseBundleInstaller是安装流程中最重要的类,最终的安装、卸载功能都是在其中实现的。

IBundleMgr中定义了获取IBundleInstaller实例的方法GetBundleInstaller。

IBundleInstaller类是BundleInstallerProxy和BundleInstallerHost的基类,只是在类中声明了Install,Uninstall等函数,具体实现是在这两个子类中实现的。

BundleInstallerProxy类实现了Install,Uninstall功能,利用IPC Proxy向service层发送安装或卸载请求。

服务层Host接收到Proxy发送过来的请求处理消息,调用BundleInstallerHost类的Install功能,调用BundleInstallerManager类的创建安装任务CreateInstallTask函数,在此函数中调用BundleInstaller类的Install功能。

BundleInstaller类的基类是BaseBundleInstaller,它的Install功能实际上调用的是BaseBundleInstaller类的InstallBundle函数。

BMSEventHandler类是继承EventHandler类的,由它来处理系统应用包的安装。它调用SystemBundleInstaller类的InstallSystemBundle函数。

SystemBundleInstaller类也是BaseBundleInstaller的子类,所以最终调用的还是BaseBundleInstaller的InstallBundle功能。

关键类介绍

类名

功能简介

IBundleMgr

包管理类,声明了获取和查询APP信息、包信息等接口。

IBundleInstaller

包安装类,声明了安装、卸载等接口。

BundleInstallerProxy

interface层包安装代理类,继承了IBundleInstaller类,实现了安装、卸载等功能。

BundleInstallerHost

service层host侧包安装类,继承了IBundleInstaller类,处理来自proxy的安装、卸载信息,实现了host侧安装、卸载等功能,。

BundleInstallerManager

包安装服务类,创建安装、卸载等任务。

BundleInstaller

包安装类,实现安装、卸载第三方应用包功能。

BMSEventHandler

继承EventHandler,实现了处理系统应用包安装等功能。

SystemBundleInstaller

系统应用包安装类,实现安装、卸载系统应用包功能。

BaseBundleInstaller

包安装基类,实现安装、卸载包功能。

第三方应用包安装流程图

Open Harmony——包管理子系统包安装模块源码解析-开源基础软件社区

源码分析

由于流程较为复杂,受篇幅限制,此处摘取流程中重要的代码段进行说明。详细的代码流程需要对照OpenHarmony源码进行学习。

1、包管理的NAPI Init()函数中注册包安装install

foundation\appexecfwk\standard\kits\appkit\napi\bundlemgr\native_module.cpp。

//注册模块
extern "C" __attribute__((constructor)) void RegisterModule(void)
{
napi_module_register(&_module);
}
//包模块描述
static napi_module _module = {
.nm_version = 1,
.nm_flags = 0,
.nm_filename = nullptr,
.nm_register_func = Init,
.nm_modname = "bundle",
.nm_priv = ((void *)0),
.reserved = {0}
};
//初始化
static napi_value Init(napi_env env, napi_value exports)
{
...
napi_property_descriptor properties[] = {
DECLARE_NAPI_FUNCTION("install", Install),//调用Install流程
DECLARE_NAPI_FUNCTION("recover", Recover),
DECLARE_NAPI_FUNCTION("uninstall", Uninstall),
};
NAPI_CALL(env,
napi_define_class(env,
"BundleInstaller",
NAPI_AUTO_LENGTH,
BundleInstallerConstructor,
nullptr,
sizeof(properties) / sizeof(*properties),
properties,
&m_classBundleInstaller));
}

2、调用 bundle_mgr.c中的 Install

foundation\appexecfwk\standard\kits\appkit\napi\bundlemgr\bundle_mgr.cpp。

napi_value Install(napi_env env, napi_callback_info info)
{
...
napi_create_async_work(
env,
nullptr,
resourceName,
[](napi_env env, void *data) {
AsyncInstallCallbackInfo *asyncCallbackInfo = (AsyncInstallCallbackInfo *)data;
if (!asyncCallbackInfo->errCode) {
InnerInstall(env,
asyncCallbackInfo->hapFiles,
asyncCallbackInfo->installParam,
asyncCallbackInfo->installResult);//调用InnerInstall
}
},
...
}
static void InnerInstall(napi_env env, const std::vector<std::string> &bundleFilePath, InstallParam &installParam,
InstallResult &installResult)
{
if (bundleFilePath.empty()) {
installResult.resultCode = static_cast<int32_t>(IStatusReceiver::ERR_INSTALL_FILE_PATH_INVALID);
return;
}
auto iBundleMgr = GetBundleMgr();
if (!iBundleMgr) {
APP_LOGE("can not get iBundleMgr");
return;
}
auto iBundleInstaller = iBundleMgr->GetBundleInstaller();
if ((iBundleInstaller == nullptr) || (iBundleInstaller->AsObject() == nullptr)) {
APP_LOGE("can not get iBundleInstaller");
return;
}
installParam.installFlag = InstallFlag::REPLACE_EXISTING;
OHOS::sptr<InstallerCallback> callback = new InstallerCallback();
if (!callback) {
APP_LOGE("callback nullptr");
return;
}

sptr<BundleDeathRecipient> recipient(new BundleDeathRecipient(callback));
iBundleInstaller->AsObject()->AddDeathRecipient(recipient);
iBundleInstaller->Install(bundleFilePath, installParam, callback);//调用IBundleInstaller的Install
installResult.resultMsg = callback->GetResultMsg();
APP_LOGD("InnerInstall resultMsg %{public}s", installResult.resultMsg.c_str());
installResult.resultCode = callback->GetResultCode();
APP_LOGD("InnerInstall resultCode %{public}d", installResult.resultCode);
}

3、IBundleInstaller的Install在继承类BundleInstallerProxy 中实现,发送安装消息

foundation\appexecfwk\standard\interfaces\innerkits\appexecfwk_core\src\bundlemgr\bundle_installer_proxy.cpp。

bool BundleInstallerProxy::Install(
const std::string &bundlePath, const InstallParam &installParam, const sptr<IStatusReceiver> &statusReceiver)
{
BYTRACE_NAME(BYTRACE_TAG_APP, __PRETTY_FUNCTION__);
MessageParcel data;
MessageParcel reply;
MessageOption option(MessageOption::TF_SYNC);
PARCEL_WRITE_INTERFACE_TOKEN(data, GetDescriptor());
PARCEL_WRITE(data, String16, Str8ToStr16(bundlePath));
PARCEL_WRITE(data, Parcelable, &installParam);
if (!statusReceiver) {
APP_LOGE("fail to install, for statusReceiver is nullptr");
return false;
}
if (!data.WriteObject<IRemoteObject>(statusReceiver->AsObject())) {
APP_LOGE("write parcel failed");
return false;
}
return SendInstallRequest(static_cast<int32_t>(IBundleInstaller::Message::INSTALL), data, reply, option);//发送安装消息
}
bool BundleInstallerProxy::SendInstallRequest(const int32_t& code, MessageParcel& data, MessageParcel& reply,
MessageOption& option)
{
sptr<IRemoteObject> remote = Remote();
if (!remote) {
APP_LOGE("fail to uninstall, for Remote() is nullptr");
return false;
}
int32_t ret = remote->SendRequest(code, data, reply, option);//发送安装消息
if (ret != NO_ERROR) {
APP_LOGE("fail to sendRequest, for transact is failed and error code is: %{public}d", ret);
return false;
}
return true;
}

4、在service层host侧处理安装消息

foundation\appexecfwk\standard\services\bundlemgr\src\bundle_installer_host.cpp。

int BundleInstallerHost::OnRemoteRequest(
uint32_t code, MessageParcel &data, MessageParcel &reply, MessageOption &option)
{
APP_LOGD("bundle installer host onReceived message, the message code is %{public}u", code);
std::u16string descripter = GetDescriptor();
std::u16string remoteDescripter = data.ReadInterfaceToken();
if (descripter != remoteDescripter) {
APP_LOGE("fail to write reply message in bundle mgr host due to the reply is nullptr");
return OBJECT_NULL;
}
switch (code) {
case static_cast<uint32_t>(IBundleInstaller::Message::INSTALL):
HandleInstallMessage(data);//处理安装消息
break;
case static_cast<uint32_t>(IBundleInstaller::Message::INSTALL_MULTIPLE_HAPS):
HandleInstallMultipleHapsMessage(data);
break;
case static_cast<uint32_t>(IBundleInstaller::Message::UNINSTALL):
HandleUninstallMessage(data);
break;
case static_cast<uint32_t>(IBundleInstaller::Message::UNINSTALL_MODULE):
HandleUninstallModuleMessage(data);
break;
case static_cast<uint32_t>(IBundleInstaller::Message::RECOVER):
HandleRecoverMessage(data);
break;
default:
return IPCObjectStub::OnRemoteRequest(code, data, reply, option);
}
return NO_ERROR;
}

void BundleInstallerHost::HandleInstallMessage(Parcel &data)
{
APP_LOGD("handle install message");
std::string bundlePath = Str16ToStr8(data.ReadString16());
std::unique_ptr<InstallParam> installParam(data.ReadParcelable<InstallParam>());
if (!installParam) {
APP_LOGE("ReadParcelable<InstallParam> failed");
return;
}
sptr<IRemoteObject> object = data.ReadObject<IRemoteObject>();
if (object == nullptr) {
APP_LOGE("read failed");
return;
}
sptr<IStatusReceiver> statusReceiver = iface_cast<IStatusReceiver>(object);

Install(bundlePath, *installParam, statusReceiver);//调用安装函数
APP_LOGD("handle install message finished");
}
bool BundleInstallerHost::Install(
const std::string &bundleFilePath, const InstallParam &installParam, const sptr<IStatusReceiver> &statusReceiver)
{
if (!CheckBundleInstallerManager(statusReceiver)) {
APP_LOGE("statusReceiver invalid");
return false;
}
if (!BundlePermissionMgr::VerifyCallingPermission(Constants::PERMISSION_INSTALL_BUNDLE)) {
APP_LOGE("install permission denied");
statusReceiver->OnFinished(ERR_APPEXECFWK_INSTALL_PERMISSION_DENIED, "");
return false;
}
manager_->CreateInstallTask(bundleFilePath, CheckInstallParam(installParam), statusReceiver);//创建安装任务
return true;
}

5、在service层bundlemgr侧创建安装任务

foundation\appexecfwk\standard\services\bundlemgr\src\bundle_installer_manager.cpp。

void BundleInstallerManager::CreateInstallTask(
const std::string &bundleFilePath, const InstallParam &installParam, const sptr<IStatusReceiver> &statusReceiver)
{
auto installer = CreateInstaller(statusReceiver);
if (!installer) {
APP_LOGE("create installer failed");
return;
}
auto task = [installer, bundleFilePath, installParam] {
int timerId = HiviewDFX::XCollie::GetInstance().SetTimer(INSTALL_TASK, TIME_OUT_SECONDS,
nullptr, nullptr, HiviewDFX::XCOLLIE_FLAG_LOG);
installer->Install(bundleFilePath, installParam);//调用BundleInstaller的Install函数
HiviewDFX::XCollie::GetInstance().CancelTimer(timerId);
};
installersPool_.AddTask(task);
}

6、在service层bundlemgr侧安装第三方应用包

foundation\appexecfwk\standard\services\bundlemgr\src\bundle_installer.cpp。

void BundleInstaller::Install(const std::string &bundleFilePath, const InstallParam &installParam)
{
ErrCode resultCode = ERR_OK;
if (installParam.userId == Constants::ALL_USERID) {
auto userInstallParam = installParam;
for (auto userId : GetExistsCommonUserIs()) {
userInstallParam.userId = userId;
userInstallParam.installFlag = InstallFlag::REPLACE_EXISTING;
resultCode = InstallBundle(
bundleFilePath, userInstallParam, Constants::AppType::THIRD_PARTY_APP);//安装第三方应用的包
ResetInstallProperties();
}
} else {
resultCode = InstallBundle(
bundleFilePath, installParam, Constants::AppType::THIRD_PARTY_APP);//安装第三方应用的包
}
statusReceiver_->OnFinished(resultCode, "");
SendRemoveEvent();
}

7. 调用BundleInstaller基类BaseBundleInstaller的InstallBundle函数

foundation\appexecfwk\standard\services\bundlemgr\src\base_bundle_installer.cpp。

ErrCode BaseBundleInstaller::InstallBundle(
const std::string &bundlePath, const InstallParam &installParam, const Constants::AppType appType)
{
std::vector<std::string> bundlePaths { bundlePath };
return InstallBundle(bundlePaths, installParam, appType);
}
ErrCode BaseBundleInstaller::InstallBundle(
const std::vector<std::string> &bundlePaths, const InstallParam &installParam, const Constants::AppType appType)
{
BYTRACE_NAME(BYTRACE_TAG_APP, __PRETTY_FUNCTION__);
APP_LOGD("begin to process bundle install");
PerfProfile::GetInstance().SetBundleInstallStartTime(GetTickCount());
int32_t uid = Constants::INVALID_UID;
ErrCode result = ProcessBundleInstall(bundlePaths, installParam, appType, uid);//处理包安装的具体流程
if (installParam.needSendEvent && dataMgr_ && !bundleName_.empty()) {
dataMgr_->NotifyBundleStatus(bundleName_,
Constants::EMPTY_STRING,
mainAbility_,
result,
isAppExist_ ? NotifyType::UPDATE : NotifyType::INSTALL,
uid);//包安装完成后反馈包安装状态
}
PerfProfile::GetInstance().SetBundleInstallEndTime(GetTickCount());
APP_LOGD("finish to process bundle install");
return result;
}

系统应用包安装流程图

Open Harmony——包管理子系统包安装模块源码解析-开源基础软件社区

源码分析

限于篇幅,每个调用函数只摘抄关键语句。

1、系统应用包安装,调用EventHandler类的继承类BMSEventHandler的ProcessEvent函数

foundation\appexecfwk\standard\services\bundlemgr\src\bundle_mgr_service_event_handler.cpp。

void BMSEventHandler::ProcessEvent(const InnerEvent::Pointer &event)
{
switch (event->GetInnerEventId()) {
case BUNDLE_SCAN_START: {
OnStartScanning(Constants::DEFAULT_USERID);//启动扫描
SetAllInstallFlag();
DelayedSingleton<BundleMgrService>::GetInstance()->RegisterService();
break;
}
case BUNDLE_SCAN_FINISHED:
break;
case BMS_START_FINISHED:
break;
case BUNDLE_REBOOT_SCAN_START: {
RebootStartScanning();
SetAllInstallFlag();
DelayedSingleton<BundleMgrService>::GetInstance()->RegisterService();
break;
}
default:
APP_LOGE("the eventId is not supported");
break;
}
}
void BMSEventHandler::OnStartScanning(int32_t userId)
{
auto future = std::async(std::launch::async, [this, userId] {
ProcessSystemBundleInstall(Constants::AppType::SYSTEM_APP, userId);//处理系统应用包安装
ProcessSystemBundleInstall(Constants::AppType::THIRD_SYSTEM_APP, userId);//处理第三方系统应用包安装
});
future.get();
}
void BMSEventHandler::ProcessSystemBundleInstall(Constants::AppType appType, int32_t userId) const
{
APP_LOGD("scan thread start");
auto scanner = std::make_unique<BundleScanner>();
if (!scanner) {
APP_LOGE("make scanner failed");
return;
}
std::string scanDir = (appType == Constants::AppType::SYSTEM_APP) ? Constants::SYSTEM_APP_SCAN_PATH
: Constants::THIRD_SYSTEM_APP_SCAN_PATH;
APP_LOGD("scanDir: %{public}s and userId: %{public}d", scanDir.c_str(), userId);
std::list<std::string> bundleList = scanner->Scan(scanDir);
auto iter = std::find(bundleList.begin(), bundleList.end(), Constants::SYSTEM_RESOURCES_APP_PATH);
if (iter != bundleList.end()) {
bundleList.erase(iter);
bundleList.insert(bundleList.begin(), Constants::SYSTEM_RESOURCES_APP_PATH);
}
for (const auto &item : bundleList) {
SystemBundleInstaller installer(item);
APP_LOGD("scan item %{public}s", item.c_str());
if (!installer.InstallSystemBundle(appType, userId)) {//调用安装系统包流程
APP_LOGW("Install System app:%{public}s error", item.c_str());
}
}
PerfProfile::GetInstance().Dump();
}

2、调用 SystemBundleInstaller的InstallSystemBundle流程

foundation\appexecfwk\standard\services\bundlemgr\src\system_bundle_installer.cpp。

bool SystemBundleInstaller::InstallSystemBundle(Constants::AppType appType, int32_t userId)
{
InstallParam installParam;
installParam.userId = userId;
installParam.isPreInstallApp = true;
installParam.noSkipsKill = false;
installParam.needSendEvent = false;
if (appType == Constants::AppType::SYSTEM_APP
|| appType == Constants::AppType::THIRD_SYSTEM_APP) {
installParam.needSavePreInstallInfo = true;
}
ErrCode result = InstallBundle(filePath_, installParam, appType);
if (result != ERR_OK) {
APP_LOGE("install system bundle fail, error: %{public}d", result);
return false;
}
return true;
}

3、与第三方应用包的安装流程一样,系统应用包安装也是调用SystemBundleInstaller的基类BaseBundleInstaller的InstallBundle函数

foundation\appexecfwk\standard\services\bundlemgr\src\base_bundle_installer.cpp。

ErrCode BaseBundleInstaller::InstallBundle(
const std::string &bundlePath, const InstallParam &installParam, const Constants::AppType appType)
{
std::vector<std::string> bundlePaths { bundlePath };
return InstallBundle(bundlePaths, installParam, appType);
}
ErrCode BaseBundleInstaller::InstallBundle(
const std::vector<std::string> &bundlePaths, const InstallParam &installParam, const Constants::AppType appType)
{
BYTRACE_NAME(BYTRACE_TAG_APP, __PRETTY_FUNCTION__);
APP_LOGD("begin to process bundle install");
PerfProfile::GetInstance().SetBundleInstallStartTime(GetTickCount());
int32_t uid = Constants::INVALID_UID;
ErrCode result = ProcessBundleInstall(bundlePaths, installParam, appType, uid);//处理包安装的具体流程
if (installParam.needSendEvent && dataMgr_ && !bundleName_.empty()) {
dataMgr_->NotifyBundleStatus(bundleName_,
Constants::EMPTY_STRING,
mainAbility_,
result,
isAppExist_ ? NotifyType::UPDATE : NotifyType::INSTALL,
uid);//包安装完成后反馈包安装状态
}
PerfProfile::GetInstance().SetBundleInstallEndTime(GetTickCount());
APP_LOGD("finish to process bundle install");
return result;
}

总结

本文主要介绍了包管理子系统的关键实现机制、主要类关系及重要的处理流程,为开发人员维护和扩展功能提供参考。

​想了解更多关于开源的内容,请访问:​

​51CTO 开源基础软件社区​

​https://ost.51cto.com​

责任编辑:jianghua 来源: 鸿蒙社区
相关推荐

2022-05-11 15:08:52

驱动开发系统移植

2022-02-28 14:54:48

openHarmon鸿蒙操作系统

2022-04-20 20:28:40

HDF 驱动框架鸿蒙操作系统

2021-12-17 16:42:09

2022-02-25 14:42:09

OpenHarmon环境搭建鸿蒙

2022-04-15 14:31:02

鸿蒙操作系统

2021-09-13 15:15:18

2022-03-04 15:43:36

文件管理模块Harmony鸿蒙

2022-04-02 20:45:04

Hi3516开发板操作系统鸿蒙

2021-09-17 14:38:58

2021-12-31 10:00:30

2022-05-24 15:46:51

Wi-FiSTA模式

2022-07-29 14:29:24

设备开发鸿蒙

2022-07-07 14:32:30

蓝牙技术鸿蒙

2022-05-17 10:42:36

reboot源码解析

2022-01-06 16:17:58

2022-04-19 11:23:26

release3.1子系统鸿蒙

2022-03-07 16:46:03

HarmonyOS鸿蒙操作系统

2022-04-29 14:56:40

通话应用源码剖析

2022-05-16 11:50:45

HDF驱动框架
点赞
收藏

51CTO技术栈公众号