Class AbstractBoot

  • All Implemented Interfaces:
    SubSystem
    Direct Known Subclasses:
    BaseBoot

    public abstract class AbstractBoot
    extends Object
    implements SubSystem
    The common base for all Boot classes.

    This initializes the subsystem and all dependent subsystems. Implementors of this class have to provide a public static getInstance() method which returns a singleton instance of the booter implementation.

    Further creation of Boot object should be prevented using protected or private constructors in that class, or proper initialzation cannot be guaranteed.

    Author:
    Thomas Morgner
    • Constructor Detail

      • AbstractBoot

        protected AbstractBoot()
        Default constructor.
    • Method Detail

      • getPackageManager

        public PackageManager getPackageManager()
        Returns the packageManager instance of the package manager.
        Specified by:
        getPackageManager in interface SubSystem
        Returns:
        The package manager.
      • isBootInProgress

        public final boolean isBootInProgress()
        Checks, whether the booting is in progress.
        Returns:
        true, if the booting is in progress, false otherwise.
      • isBootDone

        public final boolean isBootDone()
        Checks, whether the booting is complete.
        Returns:
        true, if the booting is complete, false otherwise.
      • loadConfiguration

        protected abstract Configuration loadConfiguration()
        Loads the configuration. This will be called exactly once.
        Returns:
        The configuration.
      • start

        public final void start()
        Starts the boot process.
      • performBoot

        protected abstract void performBoot()
        Performs the boot.
      • getProjectInfo

        protected abstract BootableProjectInfo getProjectInfo()
        Returns the project info.
        Returns:
        The project info.
      • loadBooter

        protected AbstractBoot loadBooter​(String classname)
        Loads the specified booter implementation.
        Parameters:
        classname - the class name.
        Returns:
        The boot class.
      • createDefaultHierarchicalConfiguration

        protected Configuration createDefaultHierarchicalConfiguration​(String staticConfig,
                                                                       String userConfig,
                                                                       boolean addSysProps)
        Creates a default configuration setup, which loads its settings from the static configuration (defaults provided by the developers of the library) and the user configuration (settings provided by the deployer). The deployer's settings override the developer's settings. If the parameter addSysProps is set to true, the system properties will be added as third configuration layer. The system properties configuration allows to override all other settings.
        Parameters:
        staticConfig - the resource name of the developers configuration
        userConfig - the resource name of the deployers configuration
        addSysProps - a flag defining whether to include the system properties into the configuration.
        Returns:
        the configured Configuration instance.
      • createDefaultHierarchicalConfiguration

        protected Configuration createDefaultHierarchicalConfiguration​(String staticConfig,
                                                                       String userConfig,
                                                                       boolean addSysProps,
                                                                       Class source)
        Creates a default hierarchical configuration.
        Parameters:
        staticConfig - the static configuration.
        userConfig - the user configuration.
        addSysProps - additional system properties.
        source - the source.
        Returns:
        The configuration.