com.goldencode.p2j.persist

Class TemporaryDatabaseManager.PrivateTempDbManager

java.lang.Object

com.goldencode.p2j.persist.TemporaryDatabaseManager.PrivateTempDbManager

All Implemented Interfaces:

TemporaryDatabaseManager.TempDbManager

Enclosing class:

TemporaryDatabaseManager

private static class TemporaryDatabaseManager.PrivateTempDbManager
extends java.lang.Object
implements TemporaryDatabaseManager.TempDbManager

Manager used for handling operations on multiple private temporary databases. This means that each session will be connected to a different database. Therefore, the connection string will differ depending on the session. Also, the initialization should be done for each physical database.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	TemporaryDatabaseManager.PrivateTempDbManager.WorkArea A class containing context-specific data.

Field Summary

Fields

Modifier and Type	Field and Description
private static java.util.Set<java.lang.String>	perUserTempDatabases All of the per-user temporary databases initialized by now.
private static ContextLocal<TemporaryDatabaseManager.PrivateTempDbManager.WorkArea>	work Context local object to manage per-session temporary databases

Constructor Summary

Constructors

Modifier	Constructor and Description
private	PrivateTempDbManager()

Method Summary

Modifier and Type	Method and Description
java.lang.String	getMyTempDbName() Retrieve the name of the temporary database used by the current session.
boolean	getNoLock() Check if the current temporary database can avoid using locks.
void	initializeMyTempDatabase() Initialize the current per-session temporary database.
boolean	removeMyTempDatabase() Remove the current per-session temporary database.

Methods inherited from class java.lang.Object

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

Field Detail

perUserTempDatabases

private static final java.util.Set<java.lang.String> perUserTempDatabases

All of the per-user temporary databases initialized by now.

work

private static final ContextLocal<TemporaryDatabaseManager.PrivateTempDbManager.WorkArea> work

Context local object to manage per-session temporary databases

Constructor Detail

PrivateTempDbManager

private PrivateTempDbManager()

Method Detail

initializeMyTempDatabase

public void initializeMyTempDatabase()

Initialize the current per-session temporary database. Even though the DatabaseManager.TEMP_TABLE_DB is marked as initialized and eventually cached (see PersistenceFactory.getInstance(Database)), some per-session databases may be uninitialized. For this matter, make sure to initialize each per-session database separately.

Specified by:

initializeMyTempDatabase in interface TemporaryDatabaseManager.TempDbManager

getNoLock

public boolean getNoLock()

Check if the current temporary database can avoid using locks.

Specified by:

getNoLock in interface TemporaryDatabaseManager.TempDbManager

Returns:

This is a private database, so there is only one user. Locking is not required.

getMyTempDbName

public java.lang.String getMyTempDbName()

Retrieve the name of the temporary database used by the current session. It is important to keep this under control in order to avoid leaking any of these per-user temporary databases names, which should be used exclusively in this manager.

Specified by:

getMyTempDbName in interface TemporaryDatabaseManager.TempDbManager

Returns:

The name of the temporary database used by the current session.

removeMyTempDatabase

public boolean removeMyTempDatabase()

Remove the current per-session temporary database.

Specified by:

removeMyTempDatabase in interface TemporaryDatabaseManager.TempDbManager

Returns:

true if there are no more per-session temporary databases left. Return true will indicate the fact that no session needs the temporary database anymore, so the afferent Database can be removed from all caches.