org.cumulus4j.store.resource
Class ResourceHelper

java.lang.Object
  org.cumulus4j.store.resource.ResourceHelper

public class ResourceHelper
extends Object

Helper class to load resources.

Author:

Marco หงุ่ยตระกูล-Schulze - marco at nightlabs dot de

Field Summary

protected static String	CUMULUS4J_BACKEND_PROPERTIES File name of the backend-properties.
protected static String	CUMULUS4J_PERSISTENCE_PROPERTIES

Constructor Summary

ResourceHelper()

Method Summary

static Map<String,Object>	getCumulus4jBackendProperties() Get the backend-properties (from file "cumulus4j-backend.properties").
static Map<String,Object>	getCumulus4jPersistenceProperties()
protected static Map<String,Object>	getPropertiesAsMap(Properties properties)
protected static InputStream	openCumulus4jBackendProperties() Open an InputStream reading the file "cumulus4j-backend.properties".
protected static InputStream	tryOpenCumulus4jPersistenceProperties()

Methods inherited from class java.lang.Object

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

Field Detail

CUMULUS4J_BACKEND_PROPERTIES

protected static final String CUMULUS4J_BACKEND_PROPERTIES

File name of the backend-properties.

See Also:

getCumulus4jBackendProperties(), Constant Field Values

CUMULUS4J_PERSISTENCE_PROPERTIES

protected static final String CUMULUS4J_PERSISTENCE_PROPERTIES

See Also:

Constant Field Values

Constructor Detail

ResourceHelper

public ResourceHelper()

Method Detail

openCumulus4jBackendProperties

protected static InputStream openCumulus4jBackendProperties()

Open an InputStream reading the file "cumulus4j-backend.properties".

Important: You must close this InputStream!!!

Returns:

an InputStream (never null).

See Also:

getCumulus4jBackendProperties()

tryOpenCumulus4jPersistenceProperties

protected static InputStream tryOpenCumulus4jPersistenceProperties()

getCumulus4jBackendProperties

public static Map<String,Object> getCumulus4jBackendProperties()

Get the backend-properties (from file "cumulus4j-backend.properties").

The backend-properties are loaded from the file "cumulus4j-backend.properties" and used for the configuration of the backend-PersistenceManagerFactory. This file only contains connection-independent settings (i.e. things that should never change). The connection-dependent settings are copied from the frontend-PMF's configuration.

Additionally, all properties in the frontend-PMF's configuration starting with "cumulus4j.datanucleus." or "cumulus4j.javax." are forwarded to the backend-PMF (without the "cumulus4j."-prefix, of course) overriding the default settings.

Returns:

a Map containing all settings from the backend-properties; never null.

getCumulus4jPersistenceProperties

public static Map<String,Object> getCumulus4jPersistenceProperties()

getPropertiesAsMap

protected static Map<String,Object> getPropertiesAsMap(Properties properties)