Hiview

• Introduction
• Directory Structure
• Constraints
• Contribution
• Usage
• Repositories Involved

Introduction

Hiview is the module of OpenHarmony that provides toolkits for device maintenance across different platforms.

Currently, Hiview opens only the plug-in management platform and system event source capabilities.

Figure 1 Architecture of Hiview

Hiview consists of the following components:

adapter: operating system adaptation layer, which adapts APIs of the system services in use

hiview base: Hiview base definition, which provides the plug-in definition, detector definition, and utility class

hiview core: Hiview core module, which provides the plug-in configuration, plug-in management, and event source functions

hiview services: Hiview services. Currently, only the Hiview run information exporting function is provided.

plugins: Independent service modules.

Hiview works in event-driven mode. The core of Hiview is a collection of HiSysEvent stubs distributed in the system.

Formatted events are reported to Hiview through the HiSysEvent API for processing. Figure 2 shows the data interaction process.

Figure 2 Data interaction between Hiview modules

1. The application framework and system services report system events using the HiSysEvent API.

2. HiSysEventSource reads events and prints the events to logs.

Directory Structure

The code directory structure of Hiview is as follows:

/base/hiviewdfx/hiview
├── adapter             # Platform adaptation code
│   ├── service        # Service adaptation code
│   └── system_service # System API adaptation code
├── base                # Module definition and utility class
│   └── utility
├── build               # Compilation scripts
├── include             # Common definitions
├── core                # Plug-in management
└── service             # Platform services

Constraints

Use of C++14 features requires libc of C++14 or later.

Contribution

If you are interested in Hiview and want to become a contributor, refer to the Code Contribution Guide.

Usage

Hiview automatically starts with the device and loads plug-ins based on the configuration file.

Repositories Involved

DFX subsystem

hiviewdfx_hiview

hiviewdfx_hilog

hiviewdfx_hiappevent

hiviewdfx_hisysevent

hiviewdfx_faultloggerd

hiviewdfx_hilog_lite

hiviewdfx_hievent_lite

hiviewdfx_hiview_lite