org.eclipse.persistence.sessions
Class DatasourceLogin

java.lang.Object
  org.eclipse.persistence.sessions.DatasourceLogin

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, Login

Direct Known Subclasses:

DatabaseLogin, EISLogin, XMLLogin

public abstract class DatasourceLogin
extends java.lang.Object
implements Login, java.io.Serializable, java.lang.Cloneable

Purpose: Hold the configuration information necessary to connect to a datasource.

Description: This is an abstract class that defines the common datasource independent connection configuration. It is extended to support specific datasources such as JDBC, JCA, XML, etc.

See Also:

Serialized Form

Field Summary

protected int	cacheTransactionIsolation By default concurrency is optimized and the cache is not locked during reads or writes, This allows for concurrent reading and writing and should never cause any problems.
static int	CONCURRENT_READ_WRITE Reads and unit of work merges can occur concurrently.
protected Connector	connector Provide a little flexibility for connecting to a database
protected org.eclipse.persistence.internal.databaseaccess.Platform	platform Implementation of platform-specific behaviors.
protected java.util.Properties	properties Connection properties (e.g. user, password, and driver-specific settings)
static int	SYNCHRONIZED_READ_ON_WRITE Reads and unit of work merges will be serialized.
static int	SYNCHRONIZED_WRITE Reads can occur concurrently but unit of work merges will be serialized.
static int	SYNCRONIZED_OBJECT_LEVEL_READ_WRITE Writes to the cache (merge, object build/refresh will be synchronized as will cache access (cloning) based on when access is required.
static int	SYNCRONIZED_OBJECT_LEVEL_READ_WRITE_DATABASE Writes to the cache (merge, object build/refresh will be synchronized as will cache access (cloning) based on database transaction.
protected boolean	usesExternalConnectionPooling True if we use an external connection pool such as WebLogic's JTS driver
protected boolean	usesExternalTransactionController True if we should use some external transaction service such as JTS.
static java.lang.String	versionString

Constructor Summary

DatasourceLogin()
PUBLIC: Create a new login.

DatasourceLogin(org.eclipse.persistence.internal.databaseaccess.Platform databasePlatform)
ADVANCED: Create a new login for the given platform.

Method Summary

void	addSequence(Sequence sequence) Add sequence corresponding to the name
java.lang.Object	clone() INTERNAL: Clone the login.
java.lang.Object	connectToDatasource(org.eclipse.persistence.internal.databaseaccess.Accessor accessor, Session session) INTERNAL: Connect to the datasource, and return the driver level connection object.
void	dontUseExternalConnectionPooling() PUBLIC: Do not use external connection pooling.
void	dontUseExternalTransactionController() PUBLIC: Let EclipseLink control transactions instead of some external transaction service such as JTS.
int	getCacheTransactionIsolation() ADVANCED: By default concurrency is optimized and the cache is not locked more than required during reads or writes, This allows for virtual concurrent reading and writing and should never cause any problems.
Connector	getConnector() ADVANCED: Return the connector that will instantiate the connection.
org.eclipse.persistence.internal.databaseaccess.Platform	getDatasourcePlatform() PUBLIC: Return the datasource platform specific information.
Sequence	getDefaultSequence() Get default sequence
Sequence	getDefaultSequenceToWrite() INTERNAL: Used only for writing the login into XML or Java.
java.lang.String	getPassword() Return the password.
DatabasePlatform	getPlatform() INTERNAL: Return the database platform specific information.
java.lang.String	getPlatformClassName() INTERNAL: Return the name of the database platform class.
java.util.Properties	getProperties() INTERNAL: The properties are additional, driver-specific, connection information to be passed to the driver.
java.lang.Object	getProperty(java.lang.String name) PUBLIC: The properties are additional, driver-specific, connection information to be passed to the driver.
protected org.eclipse.persistence.internal.security.SecurableObjectHolder	getSecurableObjectHolder() INTERNAL: Return the encryption securable holder.
Sequence	getSequence(java.lang.String seqName) Get sequence corresponding to the name
java.util.Map	getSequences() Returns a map of sequence names to Sequences (may be null).
java.util.Map	getSequencesToWrite() INTERNAL: Used only for writing the login into XML or Java.
java.lang.String	getTableQualifier() PUBLIC: Return the qualifier for the all of the tables referenced by EclipseLink.
java.lang.String	getUserName() PUBLIC: The user name is the database login name.
static java.lang.String	getVersion() PUBLIC: Return the EclipseLink version.
boolean	isConnectionHealthValidatedOnError() PUBLIC: This value defaults to false when not on a DatabaseLogin as the functionality has not been implemented for other datasource type.
void	removeAllSequences() Remove all sequences but the default one.
void	removeProperty(java.lang.String propertyName) PUBLIC: Some drivers don't like the "user" and "password" properties.
Sequence	removeSequence(java.lang.String seqName) Remove sequence corresponding to name.
void	setCacheTransactionIsolation(int cacheTransactionIsolation) ADVANCED: By default concurrency is optimized and the cache is not locked more than required during reads or writes, This allows for virtual concurrent reading and writing and should never cause any problems.
void	setConnector(Connector connector) PUBLIC: Set the connector that will instantiate the connection.
void	setDatasourcePlatform(org.eclipse.persistence.internal.databaseaccess.Platform platform) PUBLIC: Set the database platform specific information.
void	setDefaultNullValue(java.lang.Class type, java.lang.Object value) PUBLIC: The default value to substitute for database NULLs can be configured on a per-class basis.
void	setDefaultSequence(Sequence sequence) Set default sequence
void	setEncryptedPassword(java.lang.String password) Set the encrypted password.
void	setEncryptionClassName(java.lang.String encryptionClassName) Sets the encryption class name
void	setPassword(java.lang.String password) Set the password.
void	setPlatform(org.eclipse.persistence.internal.databaseaccess.Platform platform) INTERNAL: Set the database platform specific information.
void	setPlatformClassName(java.lang.String platformClassName) INTERNAL: Set the name of the Platform to be used.
void	setPlatformClassName(java.lang.String platformClassName, java.lang.ClassLoader loader) INTERNAL: Set the name of the Platform to be created using the passed in class loader.
void	setProperties(java.util.Properties properties) PUBLIC: The properties are additional, driver-specific, connection information to be passed to the JDBC driver.
void	setProperty(java.lang.String propertyName, java.lang.Object propertyValue) PUBLIC: Some JDBC drivers require additional, driver-specific, properties.
void	setSequences(java.util.Map sequences) INTERNAL: Used only for reading the login from XML.
void	setTableQualifier(java.lang.String qualifier) PUBLIC: Set the default qualifier for all tables.
void	setTimestampQuery(ValueReadQuery timestampQuery) PUBLIC: Override the default query for returning a timestamp from the server.
void	setUserName(java.lang.String name) PUBLIC: The user name is the database login name.
void	setUsesExternalConnectionPooling(boolean usesExternalConnectionPooling) PUBLIC: Return whether EclipseLink uses some external connection pooling service such as a JDBC 2.0 driver.
void	setUsesExternalTransactionController(boolean usesExternalTransactionController) PUBLIC: Return whether EclipseLink uses some external transaction service such as JTS.
boolean	shouldAllowConcurrentReadWrite() INTERNAL: Used for cache isolation.
boolean	shouldSynchronizedReadOnWrite() INTERNAL: Used for cache isolation.
boolean	shouldSynchronizeObjectLevelReadWrite() INTERNAL: Used for Cache Isolation.
boolean	shouldSynchronizeObjectLevelReadWriteDatabase() INTERNAL: Used for Cache Isolation.
boolean	shouldSynchronizeWrites() INTERNAL: Used for Cache Isolation.
boolean	shouldUseExternalConnectionPooling() PUBLIC: Return whether EclipseLink uses some external connection pooling (e.g.
boolean	shouldUseExternalTransactionController() PUBLIC: Return whether EclipseLink uses some external transaction service such as JTS.
java.lang.String	toString() PUBLIC: Print all of the connection information.
void	useExternalConnectionPooling() PUBLIC: Use external connection pooling.
void	useExternalTransactionController() PUBLIC: Use an external transaction controller such as a JTS service
void	usePlatform(org.eclipse.persistence.internal.databaseaccess.Platform platform) ADVANCED: Set the database platform to be custom platform.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.persistence.sessions.Login

buildAccessor

Field Detail

versionString

public static java.lang.String versionString

properties

protected java.util.Properties properties

Connection properties (e.g. user, password, and driver-specific settings)

platform

protected org.eclipse.persistence.internal.databaseaccess.Platform platform

Implementation of platform-specific behaviors.

connector

protected Connector connector

Provide a little flexibility for connecting to a database

usesExternalConnectionPooling

protected boolean usesExternalConnectionPooling

True if we use an external connection pool such as WebLogic's JTS driver

usesExternalTransactionController

protected boolean usesExternalTransactionController

True if we should use some external transaction service such as JTS.

cacheTransactionIsolation

protected int cacheTransactionIsolation

By default concurrency is optimized and the cache is not locked during reads or writes, This allows for concurrent reading and writing and should never cause any problems. If the application uses no form of locking the last unit of work to merge changes will win, with no locking it is possible only under this scenario for two unit of works to merge changes different than the database although highly unlikely and if occurred is the entire purpose of locking. This property allows for the isolation level of changes to the cache to be configured for sever situation and it is not suggest that this be changed.

CONCURRENT_READ_WRITE

public static final int CONCURRENT_READ_WRITE

Reads and unit of work merges can occur concurrently.

See Also:

Constant Field Values

SYNCHRONIZED_WRITE

public static final int SYNCHRONIZED_WRITE

Reads can occur concurrently but unit of work merges will be serialized.

See Also:

Constant Field Values

SYNCHRONIZED_READ_ON_WRITE

public static final int SYNCHRONIZED_READ_ON_WRITE

Reads and unit of work merges will be serialized.

See Also:

Constant Field Values

SYNCRONIZED_OBJECT_LEVEL_READ_WRITE

public static final int SYNCRONIZED_OBJECT_LEVEL_READ_WRITE

Writes to the cache (merge, object build/refresh will be synchronized as will cache access (cloning) based on when access is required.

See Also:

Constant Field Values

SYNCRONIZED_OBJECT_LEVEL_READ_WRITE_DATABASE

public static final int SYNCRONIZED_OBJECT_LEVEL_READ_WRITE_DATABASE

Writes to the cache (merge, object build/refresh will be synchronized as will cache access (cloning) based on database transaction.

See Also:

Constant Field Values

Constructor Detail

DatasourceLogin

public DatasourceLogin()

PUBLIC: Create a new login.

DatasourceLogin

public DatasourceLogin(org.eclipse.persistence.internal.databaseaccess.Platform databasePlatform)

ADVANCED: Create a new login for the given platform.

Method Detail

getSecurableObjectHolder

protected org.eclipse.persistence.internal.security.SecurableObjectHolder getSecurableObjectHolder()

INTERNAL: Return the encryption securable holder. Lazy initialize to handle serialization.

clone

public java.lang.Object clone()

INTERNAL: Clone the login. This also clones the platform as it is internal to the login.

Specified by:

clone in interface Login

Overrides:

clone in class java.lang.Object

connectToDatasource

public java.lang.Object connectToDatasource(org.eclipse.persistence.internal.databaseaccess.Accessor accessor,
                                            Session session)
                                     throws DatabaseException

INTERNAL: Connect to the datasource, and return the driver level connection object.

Specified by:

connectToDatasource in interface Login

Throws:

DatabaseException

getCacheTransactionIsolation

public int getCacheTransactionIsolation()

ADVANCED: By default concurrency is optimized and the cache is not locked more than required during reads or writes, This allows for virtual concurrent reading and writing and should never cause any problems. If the application uses no form of locking the last unit of work to merge changes will win, with no locking it is possible only under this scenario for two unit of works to merge changes different than the database although highly unlikely and if occurred is the entire purpose of locking and locking is the suggested solution if this is a problem. This property allows for the isolation level of changes to the cache to be configured for sever situations and it is not suggest that this be changed.

Setting are:

• ConcurrentReadWrite - default
• SynchronizedWrite - only allow a single writer (i.e. unit of work merge) to the cache at once
• SynchronizedReadOnWrite - do not allow reading or other unit of work merge while a unit of work is in merge

getConnector

public Connector getConnector()

ADVANCED: Return the connector that will instantiate the connection.

getPlatform

public DatabasePlatform getPlatform()

INTERNAL: Return the database platform specific information. This allows EclipseLink to configure certain advanced features for the database desired. NOTE: this must only be used for relational specific usage and will not work for non-relational datasources.

Specified by:

getPlatform in interface Login

getDatasourcePlatform

public org.eclipse.persistence.internal.databaseaccess.Platform getDatasourcePlatform()

PUBLIC: Return the datasource platform specific information. This allows EclipseLink to configure certain advanced features for the datasource desired.

Specified by:

getDatasourcePlatform in interface Login

getProperties

public java.util.Properties getProperties()

INTERNAL: The properties are additional, driver-specific, connection information to be passed to the driver.

NOTE: Do not set the password directly by getting the properties and setting the "password" property directly. Use the method DatabaseLogin.setPassword(String).

getProperty

public java.lang.Object getProperty(java.lang.String name)

PUBLIC: The properties are additional, driver-specific, connection information to be passed to the driver.

NOTE: Do not set the password directly by getting the properties and setting the "password" property directly. Use the method DatabaseLogin.setPassword(String).

Specified by:

getProperty in interface Login

getTableQualifier

public java.lang.String getTableQualifier()

PUBLIC: Return the qualifier for the all of the tables referenced by EclipseLink. This can be the creator of the table or database name the table exists on. This is required by some databases such as Oracle and DB2. This should only be used if all of the tables have the same qualifier. It can also be set on each descriptor when the table name is specified.

Specified by:

getTableQualifier in interface Login

getUserName

public java.lang.String getUserName()

PUBLIC: The user name is the database login name. Some databases do not require a user name or the user is obtained from the OS, in this case the user name not be specified.

Specified by:

getUserName in interface Login

isConnectionHealthValidatedOnError

public boolean isConnectionHealthValidatedOnError()

PUBLIC: This value defaults to false when not on a DatabaseLogin as the functionality has not been implemented for other datasource type. On an SQL Exception EclipseLink will ping the database to determine if the connection used can continue to be used for queries. This should have no impact on applications unless the user is using pessimistic locking queries with 'no wait' or are using a query timeout feature. If that is the case and the application is experiencing a performance impact from the health check then this feature can be turned off. Turning this feature off will prevent EclipseLink from being able to retry queries in the case of database failure.

Specified by:

isConnectionHealthValidatedOnError in interface Login

getVersion

public static java.lang.String getVersion()

PUBLIC: Return the EclipseLink version.

Returns:

version of EclipseLink

removeProperty

public void removeProperty(java.lang.String propertyName)

PUBLIC: Some drivers don't like the "user" and "password" properties. They can be removed with this method.

setCacheTransactionIsolation

public void setCacheTransactionIsolation(int cacheTransactionIsolation)

ADVANCED: By default concurrency is optimized and the cache is not locked more than required during reads or writes, This allows for virtual concurrent reading and writing and should never cause any problems. If the application uses no form of locking the last unit of work to merge changes will win, with no locking it is possible only under this scenario for two unit of works to merge changes different than the database although highly unlikely and if occurred is the entire purpose of locking and locking is the suggested solution if this is a problem. This property allows for the isolation level of changes to the cache to be configured for sever situations and it is not suggest that this be changed.

Setting are:

• ConcurrentReadWrite - default
• SynchronizedWrite - only allow a single writer (i.e. unit of work merge) to the cache at once
• SynchronizedReadOnWrite - do not allow reading or other unit of work merge while a unit of work is in merge

setConnector

public void setConnector(Connector connector)

PUBLIC: Set the connector that will instantiate the connection. As an example, to use a JNDI-supplied DataSource, use code something like the following:

session.getLogin().setConnector(new JNDIConnector(context, dataSourceName));
session.login();

where the context is an instance of a javax.naming.Context and the dataSourceName refers to the name of the DataSource within the context.

setDefaultNullValue

public void setDefaultNullValue(java.lang.Class type,
                                java.lang.Object value)

PUBLIC: The default value to substitute for database NULLs can be configured on a per-class basis. Example: login.setDefaultNullValue(long.class, new Long(0))

setPassword

public void setPassword(java.lang.String password)

Set the password.

Specified by:

setPassword in interface Login

getPassword

public java.lang.String getPassword()

Return the password. It will be encrypted.

Specified by:

getPassword in interface Login

setEncryptedPassword

public void setEncryptedPassword(java.lang.String password)

Set the encrypted password.

setEncryptionClassName

public void setEncryptionClassName(java.lang.String encryptionClassName)

Sets the encryption class name

setPlatform

public void setPlatform(org.eclipse.persistence.internal.databaseaccess.Platform platform)

INTERNAL: Set the database platform specific information. This allows EclipseLink to configure certain advanced features for the database desired.

Specified by:

setPlatform in interface Login

setDatasourcePlatform

public void setDatasourcePlatform(org.eclipse.persistence.internal.databaseaccess.Platform platform)

PUBLIC: Set the database platform specific information. This allows EclipseLink to configure certain advanced features for the database desired.

Specified by:

setDatasourcePlatform in interface Login

getPlatformClassName

public java.lang.String getPlatformClassName()

INTERNAL: Return the name of the database platform class.

setPlatformClassName

public void setPlatformClassName(java.lang.String platformClassName)
                          throws ValidationException

INTERNAL: Set the name of the Platform to be used. Creates a new instance of the specified Class.

Throws:

ValidationException

setPlatformClassName

public void setPlatformClassName(java.lang.String platformClassName,
                                 java.lang.ClassLoader loader)
                          throws ValidationException

INTERNAL: Set the name of the Platform to be created using the passed in class loader. If no class loader is passed in, of if an exception is thrown, call the setPlatformClassName method with no classloader.

Throws:

ValidationException

See Also:

setPlatformClassName(String platformClassName)

usePlatform

public void usePlatform(org.eclipse.persistence.internal.databaseaccess.Platform platform)

ADVANCED: Set the database platform to be custom platform.

setProperties

public void setProperties(java.util.Properties properties)

PUBLIC: The properties are additional, driver-specific, connection information to be passed to the JDBC driver.

Specified by:

setProperties in interface Login

setProperty

public void setProperty(java.lang.String propertyName,
                        java.lang.Object propertyValue)

PUBLIC: Some JDBC drivers require additional, driver-specific, properties. Add the specified property to those to be passed to the JDBC driver.

Specified by:

setProperty in interface Login

setTableQualifier

public void setTableQualifier(java.lang.String qualifier)

PUBLIC: Set the default qualifier for all tables. This can be the creator of the table or database name the table exists on. This is required by some databases such as Oracle and DB2.

setTimestampQuery

public void setTimestampQuery(ValueReadQuery timestampQuery)

PUBLIC: Override the default query for returning a timestamp from the server.

setUserName

public void setUserName(java.lang.String name)

PUBLIC: The user name is the database login name. Some databases do not require a user name or the user is obtained from the OS, in this case this should not be specified.

Specified by:

setUserName in interface Login

setUsesExternalConnectionPooling

public void setUsesExternalConnectionPooling(boolean usesExternalConnectionPooling)

PUBLIC: Return whether EclipseLink uses some external connection pooling service such as a JDBC 2.0 driver.

setUsesExternalTransactionController

public void setUsesExternalTransactionController(boolean usesExternalTransactionController)

PUBLIC: Return whether EclipseLink uses some external transaction service such as JTS.

dontUseExternalConnectionPooling

public void dontUseExternalConnectionPooling()

PUBLIC: Do not use external connection pooling. This is appropriate if using regular EclipseLink connection pooling and regular JDBC drivers.

See Also:

useExternalConnectionPooling()

dontUseExternalTransactionController

public void dontUseExternalTransactionController()

PUBLIC: Let EclipseLink control transactions instead of some external transaction service such as JTS.

See Also:

useExternalTransactionController()

shouldAllowConcurrentReadWrite

public boolean shouldAllowConcurrentReadWrite()

INTERNAL: Used for cache isolation.

Specified by:

shouldAllowConcurrentReadWrite in interface Login

shouldSynchronizedReadOnWrite

public boolean shouldSynchronizedReadOnWrite()

INTERNAL: Used for cache isolation.

Specified by:

shouldSynchronizedReadOnWrite in interface Login

shouldSynchronizeWrites

public boolean shouldSynchronizeWrites()

INTERNAL: Used for Cache Isolation. Causes EclipseLink to lock at the class level on cache updates.

Specified by:

shouldSynchronizeWrites in interface Login

shouldSynchronizeObjectLevelReadWrite

public boolean shouldSynchronizeObjectLevelReadWrite()

INTERNAL: Used for Cache Isolation. Causes EclipseLink to lock at the object level on cache updates and cache access.

Specified by:

shouldSynchronizeObjectLevelReadWrite in interface Login

shouldSynchronizeObjectLevelReadWriteDatabase

public boolean shouldSynchronizeObjectLevelReadWriteDatabase()

INTERNAL: Used for Cache Isolation. Causes EclipseLink to lock at the object level on cache updates and cache access, based on database transaction.

Specified by:

shouldSynchronizeObjectLevelReadWriteDatabase in interface Login

shouldUseExternalConnectionPooling

public boolean shouldUseExternalConnectionPooling()

PUBLIC: Return whether EclipseLink uses some external connection pooling (e.g. WebLogic's JTS driver).

Specified by:

shouldUseExternalConnectionPooling in interface Login

See Also:

useExternalConnectionPooling(), dontUseExternalConnectionPooling()

shouldUseExternalTransactionController

public boolean shouldUseExternalTransactionController()

PUBLIC: Return whether EclipseLink uses some external transaction service such as JTS.

Specified by:

shouldUseExternalTransactionController in interface Login

See Also:

useExternalTransactionController(), dontUseExternalTransactionController()

useExternalConnectionPooling

public void useExternalConnectionPooling()

PUBLIC: Use external connection pooling.

See Also:

dontUseExternalConnectionPooling(), shouldUseExternalConnectionPooling()

useExternalTransactionController

public void useExternalTransactionController()

PUBLIC: Use an external transaction controller such as a JTS service

See Also:

dontUseExternalTransactionController(), shouldUseExternalTransactionController()

toString

public java.lang.String toString()

PUBLIC: Print all of the connection information.

Overrides:

toString in class java.lang.Object

getDefaultSequence

public Sequence getDefaultSequence()

Get default sequence

setDefaultSequence

public void setDefaultSequence(Sequence sequence)

Set default sequence

addSequence

public void addSequence(Sequence sequence)

Add sequence corresponding to the name

getSequence

public Sequence getSequence(java.lang.String seqName)

Get sequence corresponding to the name

getSequences

public java.util.Map getSequences()

Returns a map of sequence names to Sequences (may be null).

removeSequence

public Sequence removeSequence(java.lang.String seqName)

Remove sequence corresponding to name. Doesn't remove default sequence.

removeAllSequences

public void removeAllSequences()

Remove all sequences but the default one.

getDefaultSequenceToWrite

public Sequence getDefaultSequenceToWrite()

INTERNAL: Used only for writing the login into XML or Java.

getSequencesToWrite

public java.util.Map getSequencesToWrite()

INTERNAL: Used only for writing the login into XML or Java.

setSequences

public void setSequences(java.util.Map sequences)

INTERNAL: Used only for reading the login from XML.