# cpl_core.application — Common Python Library documentation

# cpl_core.application

## cpl_core.application.application_abc

class `cpl_core.application.application_abc.``ApplicationABC`(config: cpl_core.configuration.configuration_abc.ConfigurationABC, services: cpl_core.dependency_injection.service_provider_abc.ServiceProviderABC )

  Bases: `abc.ABC`

  ABC for the Application class

  > config: `cpl_core.configuration.configuration_abc.ConfigurationABC`

  >   Contains object loaded from appsettings

  > services: `cpl_core.dependency_injection.service_provider_abc.ServiceProviderABC`

  >   Contains instances of prepared objects

  abstract `configure`()

    Configure the application

    Called by `cpl_core.application.application_abc.ApplicationABC.run`

  abstract `main`()

    Custom entry point

    Called by `cpl_core.application.application_abc.ApplicationABC.run`

  `run`()

    Entry point

    Called by custom Application.main

  async `run_async`()

    Entry point

    Called by custom Application.main

## cpl_core.application.application_builder

class `cpl_core.application.application_builder.``ApplicationBuilder`(app: Type[ cpl_core.application.application_abc.ApplicationABC ])

  Bases: `cpl_core.application.application_builder_abc.ApplicationBuilderABC`

  This is class is used to build a object of `cpl_core.application.application_abc.ApplicationABC`

  > app: Type[`cpl_core.application.application_abc.ApplicationABC`]

  >   Application to build

  `build`() → cpl_core.application.application_abc.ApplicationABC

    Creates custom application object

    > Object of `cpl_core.application.application_abc.ApplicationABC`

  async `build_async`() → cpl_core.application.application_abc.ApplicationABC

    Creates custom application object async

    > Object of `cpl_core.application.application_abc.ApplicationABC`

  `use_extension`(extension: Type[cpl_core.application.application_extension_abc.ApplicationExtensionABC])
  `use_startup`(startup: Type[ cpl_core.application.startup_abc.StartupABC ])

    Sets the custom startup class to use async

    > startup: Type[`cpl_core.application.startup_abc.StartupABC`]

    >   Startup class to use

## cpl_core.application.application_builder_abc

class `cpl_core.application.application_builder_abc.``ApplicationBuilderABC`(*args)

  Bases: `abc.ABC`

  ABC for the `cpl_core.application.application_builder.ApplicationBuilder`

  abstract `build`() → cpl_core.application.application_abc.ApplicationABC

    Creates custom application object

    > Object of `cpl_core.application.application_abc.ApplicationABC`

  abstract async `build_async`() → cpl_core.application.application_abc.ApplicationABC

    Creates custom application object async

    > Object of `cpl_core.application.application_abc.ApplicationABC`

  abstract async `use_startup`(startup: Type[ cpl_core.application.startup_abc.StartupABC ])

    Sets the custom startup class to use async

    > startup: Type[`cpl_core.application.startup_abc.StartupABC`]

    >   Startup class to use

## cpl_core.application.startup_abc

class `cpl_core.application.startup_abc.``StartupABC`(*args)

  Bases: `abc.ABC`

  ABC for the startup class

  abstract `configure_configuration`(config: cpl_core.configuration.configuration_abc.ConfigurationABC, env: cpl_core.environment.application_environment_abc.ApplicationEnvironmentABC ) → cpl_core.configuration.configuration_abc.ConfigurationABC

    Creates configuration of application

    > config: `cpl_core.configuration.configuration_abc.ConfigurationABC` env: `cpl_core.environment.application_environment_abc`

    > Object of `cpl_core.configuration.configuration_abc.ConfigurationABC`

  abstract `configure_services`(service: cpl_core.dependency_injection.service_collection_abc.ServiceCollectionABC, env: cpl_core.environment.application_environment_abc.ApplicationEnvironmentABC ) → cpl_core.dependency_injection.service_provider_abc.ServiceProviderABC

    Creates service provider

    > services: `cpl_core.dependency_injection.service_collection_abc` env: `cpl_core.environment.application_environment_abc`

    > Object of `cpl_core.dependency_injection.service_provider_abc.ServiceProviderABC`