org.eclipse.persistence.config
Class EntityManagerProperties

java.lang.Object
  org.eclipse.persistence.config.EntityManagerProperties

public class EntityManagerProperties
extends java.lang.Object

The class defines EclipseLink properties' names for use at the EntityManager level. This properties are specific to an EnityManger and should be passed to createEntityManager methods of EntityManagerFactory. Property values are usually case-insensitive with some common sense exceptions, for instance class names.

Field Summary

static java.lang.String	CONNECTION_POLICY ConnectionPolicy Allows to specify an entire ConnectionPolicy.
static java.lang.String	EXCLUSIVE_CONNECTION_IS_LAZY Determines when write connection is acquired lazily.
static java.lang.String	EXCLUSIVE_CONNECTION_MODE Determines when reads are performed through the write connection.
static java.lang.String	FLUSH_CLEAR_CACHE Defines EntityManager cache behavior after a call to flush method followed by a call to clear method.
static java.lang.String	JDBC_DRIVER JDBC Driver class name.
static java.lang.String	JDBC_PASSWORD DataSource or JDBC DriverManager password.
static java.lang.String	JDBC_URL JDBC Connection String.
static java.lang.String	JDBC_USER DataSource or JDBC DriverManager user name.
static java.lang.String	JOIN_EXISTING_TRANSACTION Set to "true" this property forces persistence context to read through JTA-managed ("write") connection in case there is an active transaction.
static java.lang.String	JTA_DATASOURCE JTA DataSource.
static java.lang.String	NON_JTA_DATASOURCE NON JTA DataSource.
static java.lang.String	ORACLE_PROXY_TYPE This property is used to specify proxy type that should be passed to OarcleConnection.openProxySession method.
static java.lang.String	ORDER_UPDATES Configures if updates should be ordered by primary key.
static java.lang.String	PERSISTENCE_CONTEXT_CLOSE_ON_COMMIT Specifies that the EntityManager will be closed or not used after commit (not extended).
static java.lang.String	PERSISTENCE_CONTEXT_COMMIT_WITHOUT_PERSIST_RULES Specifies that the EntityManager will search all managed objects and persist any related non-managed new objects that are found ignoring any absence of CascadeType.PERSIST settings.
static java.lang.String	PERSISTENCE_CONTEXT_FLUSH_MODE Allows the EntityManager FlushMode to be set as a persistence property.
static java.lang.String	PERSISTENCE_CONTEXT_PERSIST_ON_COMMIT Specifies that the EntityManager will search all managed objects and persist any related non-managed new objects that are cascade persist.
static java.lang.String	PERSISTENCE_CONTEXT_REFERENCE_MODE Specifies whether there should be hard or soft references used within the Persistence Context.
static java.lang.String	VALIDATE_EXISTENCE Configures if the existence of an object should be verified on persist(), otherwise it will assume to be new if not in the persistence context.

Constructor Summary

EntityManagerProperties()

Method Summary

static java.util.Set<java.lang.String>

getSupportedProperties()

Methods inherited from class java.lang.Object

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

Field Detail

JOIN_EXISTING_TRANSACTION

public static final java.lang.String JOIN_EXISTING_TRANSACTION

Set to "true" this property forces persistence context to read through JTA-managed ("write") connection in case there is an active transaction. Valid values are case-insensitive "false" and "true"; "false" is default. The property could also be set in persistence.xml or passed to createEntityManagerFactory, Note that if the property set to "true" then objects read during transaction won't be placed into the shared cache unless they have been updated. in that case it affects all EntityManagers created by the factory.

See Also:

Constant Field Values

PERSISTENCE_CONTEXT_REFERENCE_MODE

public static final java.lang.String PERSISTENCE_CONTEXT_REFERENCE_MODE

Specifies whether there should be hard or soft references used within the Persistence Context. Default is "HARD". With soft references entities no longer referenced by the application may be garbage collected freeing resources. Any changes that have not been flushed in these entities will be lost. The property could also be set in persistence.xml or passed to createEntityManagerFactory, in that case it affects all EntityManagers created by the factory. The property cannot be applied to existing active persistence unit context. The context could be removed by calling clear method on the EntityManager when there is no active transaction.

See Also:

ReferenceMode, Constant Field Values

PERSISTENCE_CONTEXT_CLOSE_ON_COMMIT

public static final java.lang.String PERSISTENCE_CONTEXT_CLOSE_ON_COMMIT

Specifies that the EntityManager will be closed or not used after commit (not extended). In general this is normally always the case for a container managed EntityManager, and common for application managed. This can be used to avoid additional performance overhead of resuming the persistence context after a commit(). The property set in persistence.xml or passed to createEntityManagerFactory affects all EntityManagers created by the factory. Alternatively, to apply the property only to some EntityManagers pass it to createEntityManager method. Either "true" or "false. "false" is the default.

See Also:

Constant Field Values

PERSISTENCE_CONTEXT_PERSIST_ON_COMMIT

public static final java.lang.String PERSISTENCE_CONTEXT_PERSIST_ON_COMMIT

Specifies that the EntityManager will search all managed objects and persist any related non-managed new objects that are cascade persist. This can be used to avoid the cost of performing this search if persist is always used for new objects. The property set in persistence.xml or passed to createEntityManagerFactory affects all EntityManagers created by the factory. Alternatively, to apply the property only to some EntityManagers pass it to createEntityManager method. Either "true" or "false. "true" is the default.

See Also:

Constant Field Values

PERSISTENCE_CONTEXT_COMMIT_WITHOUT_PERSIST_RULES

public static final java.lang.String PERSISTENCE_CONTEXT_COMMIT_WITHOUT_PERSIST_RULES

Specifies that the EntityManager will search all managed objects and persist any related non-managed new objects that are found ignoring any absence of CascadeType.PERSIST settings. Also the Entity lifecycle Persist operation will not be cascaded to related entities. This setting replicates the traditional EclipseLink native functionality.

See Also:

Constant Field Values

PERSISTENCE_CONTEXT_FLUSH_MODE

public static final java.lang.String PERSISTENCE_CONTEXT_FLUSH_MODE

Allows the EntityManager FlushMode to be set as a persistence property. This can be set to either "AUTO" or "COMMIT". By default the flush mode is AUTO, which requires an automatic flush before all query execution. This can be used to avoid any flushing until commit. The property set in persistence.xml or passed to createEntityManagerFactory affects all EntityManagers created by the factory. Alternatively, to apply the property only to some EntityManagers pass it to createEntityManager method.

See Also:

EntityManager.setFlushMode(javax.persistence.FlushModeType), FlushModeType, Constant Field Values

ORACLE_PROXY_TYPE

public static final java.lang.String ORACLE_PROXY_TYPE

This property is used to specify proxy type that should be passed to OarcleConnection.openProxySession method. Requires Oracle jdbc version 10.1.0.2 or later. Requires Oracle9Platform or later as a database platform (TARGET_DATABASE property value should be TargetDatabase.Oracle9 or later). The valid values are: OracleConnection.PROXYTYPE_USER_NAME, OracleConnection.PROXYTYPE_DISTINGUISHED_NAME, OracleConnection.PROXYTYPE_CERTIFICATE. Property property corresponding to the specified type should be also provided: OracleConnection.PROXY_USER_NAME, OracleConnection.PROXY_DISTINGUISHED_NAME, OracleConnection.PROXY_CERTIFICATE. Typically these properties should be set into EntityManager (either through createEntityManager method or using proprietary setProperties method on EntityManagerImpl) - that causes EntityManager to use proxy connection for writing and reading inside transaction. If proxy-type and the corresponding proxy property set into EntityManagerFactory then all connections created by the factory will be proxy connections. The property cannot be applied to existing active persistence unit context. The context could be removed by calling clear method on the EntityManager when there is no active transaction.

See Also:

Constant Field Values

EXCLUSIVE_CONNECTION_MODE

public static final java.lang.String EXCLUSIVE_CONNECTION_MODE

Determines when reads are performed through the write connection. This property alters ConnectionPolicy. The property cannot be applied to existing active persistence unit context. The context could be removed by calling clear method on the EntityManager when there is no active transaction.

See Also:

ExclusiveConnectionMode, Constant Field Values

EXCLUSIVE_CONNECTION_IS_LAZY

public static final java.lang.String EXCLUSIVE_CONNECTION_IS_LAZY

Determines when write connection is acquired lazily. Valid values are case-insensitive "false" and "true"; "true" is default. This property alters ConnectionPolicy. The property cannot be applied to existing active persistence unit context. The context could be removed by calling clear method on the EntityManager when there is no active transaction.

See Also:

Constant Field Values

JTA_DATASOURCE

public static final java.lang.String JTA_DATASOURCE

JTA DataSource. The value may be either data source or its name. Note that this property will be ignore in case persistence unit was setup to NOT use JTA: persistence.xml or createEntityManagerFactory had property "javax.persistence.transactionType" with RESOURCE_LOCAL value. To avoid a conflict resulting in exception don't specify this property together with either JDBC_DRIVER or JDBC_URL; however this property may override JDBC_DRIVER or JDBC_URL specified in persistence.xml or in createEntityManagerFactory method. This property alters ConnectionPolicy. The property cannot be applied to existing active persistence unit context. The context could be removed by calling clear method on the EntityManager when there is no active transaction.

See Also:

Constant Field Values

NON_JTA_DATASOURCE

public static final java.lang.String NON_JTA_DATASOURCE

NON JTA DataSource. The value may be either data source or its name. Note that this property will be ignore in case persistence unit was setup to use JTA: persistence.xml or createEntityManagerFactory had property "javax.persistence.transactionType" with JTA value. To avoid a conflict resulting in exception don't specify this property together with either JDBC_DRIVER or JDBC_URL; however this property may override JDBC_DRIVER or JDBC_URL specified in persistence.xml or in createEntityManagerFactory method. This property alters ConnectionPolicy. The property cannot be applied to existing active persistence unit context. The context could be removed by calling clear method on the EntityManager when there is no active transaction.

See Also:

Constant Field Values

JDBC_DRIVER

public static final java.lang.String JDBC_DRIVER

JDBC Driver class name. To avoid a conflict resulting in exception don't specify this property together with either JTA_DATASOURCE or JTA_DATASOURCE; however this property may override JTA_DATASOURCE or JTA_DATASOURCE specified in persistence.xml or in createEntityManagerFactory method. This property alters ConnectionPolicy. The property cannot be applied to existing active persistence unit context. The context could be removed by calling clear method on the EntityManager when there is no active transaction.

See Also:

Constant Field Values

JDBC_URL

public static final java.lang.String JDBC_URL

JDBC Connection String. To avoid a conflict resulting in exception don't specify this property together with either JTA_DATASOURCE or JTA_DATASOURCE; however this property may override JTA_DATASOURCE or JTA_DATASOURCE specified in persistence.xml or in createEntityManagerFactory method. This property alters ConnectionPolicy. The property cannot be applied to existing active persistence unit context. The context could be removed by calling clear method on the EntityManager when there is no active transaction.

See Also:

Constant Field Values

JDBC_USER

public static final java.lang.String JDBC_USER

DataSource or JDBC DriverManager user name. Non-empty value overrides the value assigned in persistence.xml or in createEntityManagerFactory; empty string value causes removal this property and JDBC_PASSWORD property specified in persistence.xml or in createEntityManagerFactory method. This property alters ConnectionPolicy. The property cannot be applied to existing active persistence unit context. The context could be removed by calling clear method on the EntityManager when there is no active transaction.

See Also:

Constant Field Values

JDBC_PASSWORD

public static final java.lang.String JDBC_PASSWORD

DataSource or JDBC DriverManager password. Non-empty value overrides the value assigned in persistence.xml or in createEntityManagerFactory; empty string value causes removal this property specified in persistence.xml or in createEntityManagerFactory method. This property alters ConnectionPolicy. The property cannot be applied to existing active persistence unit context. The context could be removed by calling clear method on the EntityManager when there is no active transaction.

See Also:

Constant Field Values

CONNECTION_POLICY

public static final java.lang.String CONNECTION_POLICY

ConnectionPolicy Allows to specify an entire ConnectionPolicy. Note that in case any other ConnectionPolicy-altering properties are present they will be applied to this ConnectionPolicy. The property cannot be applied to existing active persistence unit context. The context could be removed by calling clear method on the EntityManager when there is no active transaction.

See Also:

Constant Field Values

VALIDATE_EXISTENCE

public static final java.lang.String VALIDATE_EXISTENCE

Configures if the existence of an object should be verified on persist(), otherwise it will assume to be new if not in the persistence context. If checked and existing and not in the persistence context and error will be thrown. "false" by default.

See Also:

Constant Field Values

ORDER_UPDATES

public static final java.lang.String ORDER_UPDATES

Configures if updates should be ordered by primary key. This can be used to avoid possible database deadlocks from concurrent threads updating the same objects in different order. If not set to true, the order of updates is not guaranteed. "false" by default.

See Also:

Constant Field Values

FLUSH_CLEAR_CACHE

public static final java.lang.String FLUSH_CLEAR_CACHE

Defines EntityManager cache behavior after a call to flush method followed by a call to clear method. This property could be specified while creating either EntityManagerFactory (either in the map passed to createEntityManagerFactory method or in persistence.xml) or EntityManager (in the map passed to createEntityManager method); the latter overrides the former.

See Also:

FlushClearCache, Constant Field Values

Constructor Detail

EntityManagerProperties

public EntityManagerProperties()

Method Detail

getSupportedProperties

public static java.util.Set<java.lang.String> getSupportedProperties()