Process Model (FA Model)

The OpenHarmony process model is shown below.

• All PageAbility, ServiceAbility, DataAbility, and FormAbility components of an application (with the same bundle name) run in an independent process, which is Main process in green in the figure.

• WebView has an independent rendering process, which is Render process in yellow in the figure.

  Figure 1 Process model

  

OpenHarmony provides two inter-process communication (IPC) mechanisms.

• Common Events: This mechanism is used in one-to-many communication scenarios. Multiple subscribers may receive events at the same time.

• Background Services: This mechanism is implemented through ServiceAbility.