org.protempa.backend

Class BackendProviderManager

java.lang.Object

org.protempa.backend.BackendProviderManager

public final class BackendProviderManager
extends Object

Manages PROTEMPA's backend provider. Uses Java's ServiceLoader to load a BackendProvider. By default, it configures ServiceLoader to use the current thread's context class loader. The BackendProvider is loaded lazily upon calls to getBackendProvider() or the backend spec loader getter methods. Use setBackendProviderClassLoader(java.lang.ClassLoader) to specify a different class loader. A program can also explicitly set a backend provider using the setBackendProvider(org.protempa.backend.BackendProvider) method. This will override the use of ServiceLoader.

Author:

Andrew Post

Method Summary

Modifier and Type	Method and Description
static BackendSpecLoader<AlgorithmSourceBackend>	getAlgorithmSourceBackendSpecLoader()
static BackendProvider	getBackendProvider()
static ClassLoader	getBackendProviderClassLoader()
static BackendSpecLoader<DataSourceBackend>	getDataSourceBackendSpecLoader()
static BackendSpecLoader<KnowledgeSourceBackend>	getKnowledgeSourceBackendSpecLoader()
static boolean	isBackendProviderClassLoaderSpecified() Indicates whether setBackendProviderClassLoader(java.lang.ClassLoader) has been called.
static void	setBackendProvider(BackendProvider backendProvider)
static void	setBackendProviderClassLoader(ClassLoader loader) Sets the class loader to use for loading a BackendProvider.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

setBackendProviderClassLoader

public static void setBackendProviderClassLoader(ClassLoader loader)

Sets the class loader to use for loading a BackendProvider. If never called, the current thread's context class loader will be used. If set to null, the system class loader (or, failing that, the bootstrap class loader) will be used.

Parameters:

loader -

getBackendProviderClassLoader

public static ClassLoader getBackendProviderClassLoader()

isBackendProviderClassLoaderSpecified

public static boolean isBackendProviderClassLoaderSpecified()

Indicates whether setBackendProviderClassLoader(java.lang.ClassLoader) has been called.

Returns:

whether setBackendProviderClassLoader(java.lang.ClassLoader) has been called.

setBackendProvider

public static void setBackendProvider(BackendProvider backendProvider)

getBackendProvider

public static BackendProvider getBackendProvider()

getDataSourceBackendSpecLoader

public static BackendSpecLoader<DataSourceBackend> getDataSourceBackendSpecLoader()
                                                                           throws BackendProviderSpecLoaderException

Throws:

BackendProviderSpecLoaderException

getKnowledgeSourceBackendSpecLoader

public static BackendSpecLoader<KnowledgeSourceBackend> getKnowledgeSourceBackendSpecLoader()
                                                                                     throws BackendProviderSpecLoaderException

Throws:

BackendProviderSpecLoaderException

getAlgorithmSourceBackendSpecLoader

public static BackendSpecLoader<AlgorithmSourceBackend> getAlgorithmSourceBackendSpecLoader()
                                                                                     throws BackendProviderSpecLoaderException

Throws:

BackendProviderSpecLoaderException