jet.server.api.db
Class DBManager

java.lang.Object
  jet.server.api.db.DBManager

public final class DBManager
extends java.lang.Object

Class DBManager provides some methods to help manage databases in the JReport Server, such as travel all Workspace, backup and restore database, etc.

Method Summary

static boolean	backup(Database db, java.lang.String bkVolume) Backups a specified Database to an archive.
static java.util.Set	checkIntegrality(java.lang.String dbName) Checks the integrity of the database specified by name.
static boolean	cutdownTable(Table tbl, java.lang.String bkVolume, java.lang.String where) Cuts down data in a table and store those data to an archive.
static java.lang.String[]	getAllSupportDBTypes() Gets all database types supported by the JReport server.
static java.lang.String[]	getAllSupportDrivers() Gets all JDBC drivers supported by the JReport server.
static Workspace	getDefaultWorkspace() Gets the default workspace.
static Workspace	getSystemWorkspace() Gets the system workspace.
static java.util.Properties	getVolumeSummary(java.lang.String bkVolume) Retrieves the summary information of a backup or cut archive.
static boolean	importsTable(Table tbl, java.lang.String bkVolume) Imports cut data from an archive to a table.
static boolean	isDefault(Workspace wk) Tests whether a workspace is the default workspace.
static boolean	saveConfig() Saves database JDBC configuration.
static FieldValue[]	statResultVersion(Database db) Retrieves some information from result version table in "realmtables" database.
static FieldValue[]	statTaskContext(Database db) Retrieves some information from task context table in "profiling" database.
static boolean	testConnecting(java.util.Properties info) Tests JDBC configuration information.
static Workspaces	workspaces() Gets the workspace container.
static Workspace	workspaces(int index) Gets the workspace specified by index.
static Workspace	workspaces(java.lang.String wkName) Gets the workspace specified by name.

Methods inherited from class java.lang.Object

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

Method Detail

getDefaultWorkspace

public static Workspace getDefaultWorkspace()

Gets the default workspace.

Returns:

the default workspace.

getSystemWorkspace

public static Workspace getSystemWorkspace()

Gets the system workspace.

Returns:

the system workspace.

workspaces

public static Workspaces workspaces()

Gets the workspace container.

Returns:

the Workspaces in the server.

workspaces

public static Workspace workspaces(int index)

Gets the workspace specified by index.

Parameters:

index -

Returns:

the Workspace.

workspaces

public static Workspace workspaces(java.lang.String wkName)

Gets the workspace specified by name.

Parameters:

wkName - the workspace name.

Returns:

the Workspace.

isDefault

public static boolean isDefault(Workspace wk)

Tests whether a workspace is the default workspace.

Parameters:

wk - the Workspace.

Returns:

true if the specified Workspace is the default.

getAllSupportDrivers

public static java.lang.String[] getAllSupportDrivers()

Gets all JDBC drivers supported by the JReport server.

Returns:

a String array to represent all supported JDBC drivers.

getAllSupportDBTypes

public static java.lang.String[] getAllSupportDBTypes()

Gets all database types supported by the JReport server.

Returns:

a String array to represent all database types supported by JReport server.

testConnecting

public static boolean testConnecting(java.util.Properties info)

Tests JDBC configuration information.

Parameters:

info - a Properties which represents JDBC configuration information.

Returns:

true if the connecting succeeded, false if failed.

backup

public static boolean backup(Database db,
                             java.lang.String bkVolume)

Backups a specified Database to an archive.

Parameters:

db - the database to backup.

bkVolume - the archive file name.

Returns:

true if backup succeeded, otherwise false.

cutdownTable

public static boolean cutdownTable(Table tbl,
                                   java.lang.String bkVolume,
                                   java.lang.String where)

Cuts down data in a table and store those data to an archive. Now, for "realmtables" database, only the result version table "RESULTVERSION_2" can be cut down. And for "profiling" database, only the table "TaskContext" can be cut down.

Parameters:

tbl - the table that you want to cut down data from.

bkVolume - the full path name of the archive that you want to store the cut data in.

where - the sql conditions by which you cut down data.

Returns:

true if the operation is successful, or else return false.

See Also:

Database.importsTable(jet.server.api.db.Table, java.lang.String)

importsTable

public static boolean importsTable(Table tbl,
                                   java.lang.String bkVolume)

Imports cut data from an archive to a table. Now, for "realmtables" database, only the result version table "RESULTVERSION_2" can be cut down, so only the table "RESULTVERSION_2" can be imported data into. And for "profiling" database, only the table "TaskContext" can be cut down, so only the table "TaskContext" can be imported data into.

Parameters:

tbl - the table that you want to import cut data into.

bkVolume - the archive name that you want to import cut data from.

Returns:

true of the importing succeeded, otherwise false.

See Also:

Database.cutdownTable(jet.server.api.db.Table, java.lang.String, java.lang.String)

saveConfig

public static boolean saveConfig()

Saves database JDBC configuration.

Returns:

true if succeeded

statResultVersion

public static FieldValue[] statResultVersion(Database db)
                                      throws java.sql.SQLException

Retrieves some information from result version table in "realmtables" database.

Parameters:

db - a database.

Returns:

a FieldValuue array containing needed information.

Throws:

java.sql.SQLException - if SQLException is thrown during the operation.

statTaskContext

public static FieldValue[] statTaskContext(Database db)
                                    throws java.sql.SQLException

Retrieves some information from task context table in "profiling" database.

Parameters:

db - the Database for "profiling".

Returns:

a FieldValuue array containing needed information.

Throws:

java.sql.SQLException - if SQLException is thrown during the operation.

checkIntegrality

public static java.util.Set checkIntegrality(java.lang.String dbName)
                                      throws java.sql.SQLException,
                                             java.io.IOException

Checks the integrity of the database specified by name.

Parameters:

dbName - the Database name.

Returns:

a Set containing all invalid external files.

Throws:

java.sql.SQLException - if SQLException is thrown during the operation.

java.io.IOException - if IOException is thrown during the operation.

getVolumeSummary

public static java.util.Properties getVolumeSummary(java.lang.String bkVolume)
                                             throws java.io.IOException

Retrieves the summary information of a backup or cut archive.

Parameters:

bkVolume - the archive file.

Returns:

a Properties containing summary information.

Throws:

java.io.IOException - if IOException is thrown during the operation.