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Java Source Code / Java Documentation » J2EE » Enhydra Application Framework » com.lutris.appserver.server.sql

Source Cross Reference Class Diagram Java Document (Java Doc)

com.lutris.appserver.server.sql .DatabaseManager

DatabaseManager
public interface DatabaseManager (Code)
	The database management object interface. This class implementing this interface manages the database connections for one application. version: $Revision: 1.2 $ author: Paul Morgan

Field Summary
boolean	debug Flag to enable debug logging of queries and transactions.

Method Summary
public DBConnection	allocateConnection(String dbName) Allocate a connection to the specified logic database.
public DBConnection	allocateConnection() Allocate a connection to the default logical database.
public ObjectId	allocateObjectId(String dbName) Allocate an object id from the specified logical database. Parameters: dbName - Logical name of the database from which to obtain an object id.
public ObjectId	allocateObjectId() Allocate an object id from the specified logical database. The allocated connection object. exception: DatabaseManagerException - If a nonexistent default logical database has been set. exception: ObjectIdException - If a problem (e.g.
public void	checkOId(String dbName, ObjectId oid)
public void	checkOId(ObjectId oid)
public DBQuery	createQuery(String dbName) Create a query object for the specified logical database. Parameters: dbName - Logical name of the database from which to obtain a query.
public DBQuery	createQuery() Create a query object for the default logical database.
public DBTransaction	createTransaction(String dbName) Create a transaction object for the specified logical database. Parameters: dbName - Logical name of the database from which to obtain a transaction.
public DBTransaction	createTransaction() Create a transaction object for the default logical database.
public LogicalDatabase	findLogicalDatabase(String dbName)
public int	getActiveConnectionCount(String dbName) Returns the number of currently active connections for the supplied logical database name.
public Config	getConfig()
public String	getDefaultDB()
public String[]	getLogicalDatabaseNames() Returns the list of managed logical databases.
public int	getMaxConnectionCount(String dbName) Returns the maximum number of concurent connections that existed at any time since this object was created, or `resetMaxConnectionCount()` was called. This is a historical highwater mark.
public Date	getMaxConnectionCountDate(String dbName) Returns the time when the maximum refered to by `maxConnectionCount()` occured.
public long	getRequestCount(String dbName) Returns the number of requests made to the database since startup time.
public String	getType(String dbName) Returns a description of the logical database type.
public String	logicalDatabaseType(String dbName) Return a logical database type for the default logical database. Parameters: dbName - Logical name of the database from which to obtain a query.
public String	logicalDatabaseType() Return a logical database type for the default logical database.
public void	registerMBeans(String appPrefix, Config appConfig, ClassLoader clsLoader)
public void	resetMaxConnectionCount(String dbName) Reset the maximum connection count.
public void	setDefaultDatabase(String dbName) Set the default logical database.
public void	shutdown() Shutdown the database manager.
public void	unregisterMBeans()

Field Detail

debug
boolean debug(Code)
	Flag to enable debug logging of queries and transactions.

Method Detail

allocateConnection
public DBConnection allocateConnection(String dbName) throws DatabaseManagerException, SQLException(Code)
	Allocate a connection to the specified logic database. The connection should be returned to the pool by calling its release() function. A thread will wait if no connections are available. Interupted exceptions are converted to errors. Parameters: dbName - Logical name of the database to allocate a connection to. The allocated connection object. exception: DatabaseManagerException - If a nonexistent logical database name is supplied. exception: SQLException - If a SQL error occures.

allocateConnection
public DBConnection allocateConnection() throws DatabaseManagerException, SQLException(Code)
	Allocate a connection to the default logical database. The connection should be returned to the pool by calling its release() function. A thread will wait if no connections are available. Interupted exceptions are converted to errors. The allocated connection object. exception: DatabaseManagerException - If a nonexistent default logical database name is supplied. exception: SQLException - If a SQL error occures. See Also: DatabaseManager.setDefaultDatabase

allocateObjectId
public ObjectId allocateObjectId(String dbName) throws DatabaseManagerException, ObjectIdException(Code)
	Allocate an object id from the specified logical database. Parameters: dbName - Logical name of the database from which to obtain an object id. The allocated unique OID exception: DatabaseManagerException - If a nonexistent logical database name is supplied. exception: ObjectIdException - If a problem (e.g. SQL error) occured in obtaining the OID.

allocateObjectId
public ObjectId allocateObjectId() throws DatabaseManagerException, ObjectIdException(Code)
	Allocate an object id from the specified logical database. The allocated connection object. exception: DatabaseManagerException - If a nonexistent default logical database has been set. exception: ObjectIdException - If a problem (e.g. SQL error) occured in obtaining the OID. See Also: DatabaseManager.setDefaultDatabase

checkOId
public void checkOId(String dbName, ObjectId oid) throws DatabaseManagerException, ObjectIdException(Code)
	Check does oid belong to Object id's range [minOId, currentOId] Parameters: dbName - Logical name of the database from which to check an object id. Parameters: oid - oid which will be checked. exception: DatabaseManagerException - If a nonexistent logical database name is supplied. exception: ObjectIdException - If a oid does't belong to range.

checkOId
public void checkOId(ObjectId oid) throws DatabaseManagerException, ObjectIdException(Code)
	Check does oid belong to Object id's range [minOId, currentOId] for default database Parameters: oid - oid which will be checked. exception: DatabaseManagerException - If a nonexistent default logical database has been set. exception: ObjectIdException - If a oid does't belong to range.

createQuery
public DBQuery createQuery(String dbName) throws DatabaseManagerException, SQLException(Code)
	Create a query object for the specified logical database. Parameters: dbName - Logical name of the database from which to obtain a query. The query exception: DatabaseManagerException - If a nonexistent or invalid logical database name is supplied. exception: SQLException - If a problem occured creating the query.

createQuery
public DBQuery createQuery() throws DatabaseManagerException, SQLException(Code)
	Create a query object for the default logical database. The query exception: DatabaseManagerException - If a nonexistent default logical database has been set. exception: SQLException - If a problem occured creating the query. See Also: DatabaseManager.setDefaultDatabase

createTransaction
public DBTransaction createTransaction(String dbName) throws DatabaseManagerException, SQLException(Code)
	Create a transaction object for the specified logical database. Parameters: dbName - Logical name of the database from which to obtain a transaction. The transaction exception: DatabaseManagerException - If a nonexistent or invalid logical database name is supplied. exception: SQLException - If a problem occured creating the transaction.

createTransaction
public DBTransaction createTransaction() throws DatabaseManagerException, SQLException(Code)
	Create a transaction object for the default logical database. The transaction exception: DatabaseManagerException - If a nonexistent default logical database has been set. exception: SQLException - If a problem occured creating the transaction. See Also: DatabaseManager.setDefaultDatabase

findLogicalDatabase
public LogicalDatabase findLogicalDatabase(String dbName) throws DatabaseManagerException(Code)

getActiveConnectionCount
public int getActiveConnectionCount(String dbName) throws DatabaseManagerException(Code)
	Returns the number of currently active connections for the supplied logical database name. If not implemented, then -1 is returned. Parameters: dbName - The logical database name.The number of currently active connections. exception: DatabaseManagerException - If a nonexistent logical database name is supplied.

getConfig
public Config getConfig()(Code)
	Return main configuration class main configuration class.

getDefaultDB
public String getDefaultDB()(Code)
	Return default database name (given in config file) default database name

getLogicalDatabaseNames
public String[] getLogicalDatabaseNames()(Code)
	Returns the list of managed logical databases. List of logical database names.

getMaxConnectionCount
public int getMaxConnectionCount(String dbName) throws DatabaseManagerException(Code)
	Returns the maximum number of concurent connections that existed at any time since this object was created, or `resetMaxConnectionCount()` was called. This is a historical highwater mark. If not implemented, then -1 is returned. Parameters: dbName - The logical database name.The highwater mark for number of connections, or -1. exception: DatabaseManagerException - If a nonexistent logical database name is supplied.

getMaxConnectionCountDate
public Date getMaxConnectionCountDate(String dbName) throws DatabaseManagerException(Code)
	Returns the time when the maximum refered to by `maxConnectionCount()` occured. If not implemented, then null is returned. Parameters: dbName - The logical database name.The Date of when the maximum number of connections occured. exception: DatabaseManagerException - If a nonexistent logical database name is supplied.

getRequestCount
public long getRequestCount(String dbName) throws DatabaseManagerException(Code)
	Returns the number of requests made to the database since startup time. Parameters: dbName - The logical database name.The number of database requests since the server started. exception: DatabaseManagerException - If a nonexistent logical database name is supplied.

getType
public String getType(String dbName) throws DatabaseManagerException(Code)
	Returns a description of the logical database type. Parameters: dbName - The logical database name.A text description of the logical database type. exception: DatabaseManagerException - If a nonexistent logical database name is supplied.

logicalDatabaseType
public String logicalDatabaseType(String dbName) throws DatabaseManagerException, SQLException(Code)
	Return a logical database type for the default logical database. Parameters: dbName - Logical name of the database from which to obtain a query. logical database type exception: DatabaseManagerException - If a nonexistent default logical database has been set. exception: SQLException - If a problem occured creating the query. See Also: DatabaseManager.setDefaultDatabase

logicalDatabaseType
public String logicalDatabaseType() throws DatabaseManagerException, SQLException(Code)
	Return a logical database type for the default logical database. logical database type exception: DatabaseManagerException - If a nonexistent default logical database has been set. exception: SQLException - If a problem occured creating the query. See Also: DatabaseManager.setDefaultDatabase

registerMBeans
public void registerMBeans(String appPrefix, Config appConfig, ClassLoader clsLoader)(Code)

resetMaxConnectionCount
public void resetMaxConnectionCount(String dbName) throws DatabaseManagerException(Code)
	Reset the maximum connection count. See `maxConnectionCount()`. The highwater mark should be reset to the current number of connections. Parameters: dbName - The logical database name. exception: DatabaseManagerException - If a nonexistent logical database name is supplied.

setDefaultDatabase
public void setDefaultDatabase(String dbName) throws DatabaseManagerException(Code)
	Set the default logical database. This should be used with caution, but it makes allocating connections easier. Parameters: dbName - The default logical dabase name. exception: DatabaseManagerException - If a nonexistent or illegal logical database name is supplied.

shutdown
public void shutdown()(Code)
	Shutdown the database manager. All logical databases will be shutdown and all connection closed.

unregisterMBeans
public void unregisterMBeans()(Code)

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