DEPRECATION WARNING: The Modular framework is being deprecated in favor of the Session Framework.
A Module is a component which displays UI in a Modular session. Modules are
added to a story (a container for Modules). Multiple modules can be added to a
single story.
Environment
A module is given access to two services provided by the modular framework in its incoming namespace:
fuchsia.modular.ComponentContextwhich gives the agent access to functionality which is shared across components run under the modular framework (e.g. modules, shells, agents).fuchsia.modular.ModuleContextwhich gives modules access to module specific functionality.
A module is expected to provide three services to the modular framework in its outgoing namespace:
fuchsia.ui.app.ViewProviderwhich is used to display the module's UI.fuchsia.modular.Lifecyclewhich allows the framework to signal the module to terminate gracefully.
Lifecycle
A module's lifecycle is bound to the lifecycle of the story it is part of. In addition, a given module can have multiple running instances in a single story.
Communication Mechanisms
Modules can acquire services from agents by connecting to those services from the module's incoming directory.
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Last updated 2020-03-06.