Class ReloadingMultiFileConfigurationBuilder<T extends FileBasedConfiguration>

Type Parameters:
T - the concrete type of Configuration objects created by this builder
All Implemented Interfaces:
ConfigurationBuilder<T>, EventSource, ReloadingControllerSupport

A specialized MultiFileConfigurationBuilder implementation which adds support for reloading.

This class - as its super class - allows operating on multiple configuration files whose file names are determined using a file name pattern and a ConfigurationInterpolator object. It provides the following additional features:

  • Configuration builder for managed configurations have reloading support. So reloading is possible for all configuration sources loaded by this builder instance.
  • A ReloadingController is provided which can be used to trigger reload checks on all managed configurations.

Although this builder manages an arbitrary number of child configurations, to clients only a single configuration is visible - the one selected by the evaluation of the file name pattern. Builder reset notifications triggered by the reloading mechanism do not really take this fact into account; they are not limited to the currently selected child configuration, but occur for each of the managed configuration.

Since:
2.0
  • Constructor Details

    • ReloadingMultiFileConfigurationBuilder

      public ReloadingMultiFileConfigurationBuilder(Class<T> resCls, Map<String,Object> params, boolean allowFailOnInit)
      Creates a new instance of ReloadingMultiFileConfigurationBuilder and sets initialization parameters and a flag whether initialization failures should be ignored.
      Parameters:
      resCls - the result configuration class
      params - a map with initialization parameters
      allowFailOnInit - a flag whether initialization errors should be ignored
      Throws:
      IllegalArgumentException - if the result class is null
    • ReloadingMultiFileConfigurationBuilder

      Creates a new instance of ReloadingMultiFileConfigurationBuilder and sets initialization parameters.
      Parameters:
      resCls - the result configuration class
      params - a map with initialization parameters
      Throws:
      IllegalArgumentException - if the result class is null
    • ReloadingMultiFileConfigurationBuilder

      Creates a new instance of ReloadingMultiFileConfigurationBuilder without setting initialization parameters.
      Parameters:
      resCls - the result configuration class
      Throws:
      IllegalArgumentException - if the result class is null
  • Method Details

    • getReloadingController

      Gets the ReloadingController associated with this object. This implementation returns a special ReloadingController that delegates to the reloading controllers of the managed builders created so far.
      Specified by:
      getReloadingController in interface ReloadingControllerSupport
      Returns:
      the associated ReloadingController
    • createManagedBuilder

      Creates a builder for a managed configuration. This method is called whenever a configuration for a file name is requested which has not yet been loaded. The passed in map with parameters is populated from this builder's configuration (i.e. the basic parameters plus the optional parameters for managed builders). This base implementation creates a standard builder for file-based configurations. Derived classes may override it to create special purpose builders. This implementation returns a file-based configuration builder with reloading support.
      Overrides:
      createManagedBuilder in class MultiFileConfigurationBuilder<T extends FileBasedConfiguration>
      Parameters:
      fileName - the name of the file to be loaded
      params - a map with initialization parameters for the new builder
      Returns:
      the newly created builder instance
      Throws:
      ConfigurationException - if an error occurs