org.datanucleus

Class NucleusContextHelper

java.lang.Object

org.datanucleus.NucleusContextHelper

public class NucleusContextHelper
extends Object

Helper methods for NucleusContext operations.

Field Summary

Fields

Modifier and Type	Field and Description
static Random	random Random number generator, for use when needing unique names.

Constructor Summary

Constructors

Constructor and Description
NucleusContextHelper()

Method Summary

Modifier and Type	Method and Description
static StoreManager	createStoreManagerForProperties(Map<String,Object> props, Map<String,Object> datastoreProps, ClassLoaderResolver clr, NucleusContext nucCtx) Method to create a StoreManager based on the specified properties passed in.
static String	getTransactionIsolationForStoreManager(StoreManager storeMgr, String transactionIsolation) Method to return the transaction isolation level that will be used for the provided StoreManager bearing in mind the specified level the user requested.

Methods inherited from class java.lang.Object

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

Field Detail

random

public static final Random random

Random number generator, for use when needing unique names.

Constructor Detail

NucleusContextHelper

public NucleusContextHelper()

Method Detail

getTransactionIsolationForStoreManager

public static String getTransactionIsolationForStoreManager(StoreManager storeMgr,
                                                            String transactionIsolation)

Method to return the transaction isolation level that will be used for the provided StoreManager bearing in mind the specified level the user requested.

Parameters:

storeMgr - The Store Manager

transactionIsolation - Requested isolation level

Returns:

Isolation level to use

Throws:

TransactionIsolationNotSupportedException - When no suitable level available given the requested level

createStoreManagerForProperties

public static StoreManager createStoreManagerForProperties(Map<String,Object> props,
                                                           Map<String,Object> datastoreProps,
                                                           ClassLoaderResolver clr,
                                                           NucleusContext nucCtx)

Method to create a StoreManager based on the specified properties passed in.

Parameters:

props - The overall persistence properties

datastoreProps - Persistence properties to apply to the datastore

clr - ClassLoader resolver

nucCtx - NucleusContext

Returns:

The StoreManager

Throws:

NucleusUserException - if impossible to create the StoreManager (not in CLASSPATH?, invalid definition?)