org.apache.derby.impl.db
Class BasicDatabase

java.lang.Object
  extended by org.apache.derby.impl.db.BasicDatabase
All Implemented Interfaces:
Database, LocaleFinder, JarReader, ModuleControl, ModuleSupportable, PropertySetCallback
Direct Known Subclasses:
SlaveDatabase

public class BasicDatabase
extends java.lang.Object
implements ModuleControl, ModuleSupportable, PropertySetCallback, Database, JarReader

The Database interface provides control over the physical database (that is, the stored data and the files the data are stored in), connections to the database, operations on the database such as backup and recovery, and all other things that are associated with the database itself.

The Database interface does not provide control over things that are part of the Domain, such as users.

I'm not sure what this will hold in a real system, for now it simply provides connection-creation for us. Perhaps when it boots, it creates the datadictionary object for the database, which all users will then interact with?


Field Summary
protected  boolean active
           
protected  AccessFactory af
           
private  AuthenticationService authenticationService
           
protected  ClassFactory cfDB
           
private  java.util.Locale databaseLocale
           
private  java.text.DateFormat dateFormat
           
private  DataDictionary dd
          DataDictionary for this database.
protected  boolean lastToBoot
           
protected  LanguageConnectionFactory lcf
           
protected  LanguageFactory lf
           
private  UUID myUUID
           
protected  PropertyFactory pf
           
protected  java.lang.Object resourceAdapter
           
private  java.text.DateFormat timeFormat
           
private  java.text.DateFormat timestampFormat
           
 
Constructor Summary
BasicDatabase()
           
 
Method Summary
 Serviceable apply(java.lang.String key, java.io.Serializable value, java.util.Dictionary p)
          Apply a property change.
 void backup(java.lang.String backupDir, boolean wait)
          Backup the database to a backup directory.
 void backupAndEnableLogArchiveMode(java.lang.String backupDir, boolean deleteOnlineArchivedLogFiles, boolean wait)
          Backup the database to a backup directory and enable the log archive mode that will keep the archived log files required for roll-forward from this version backup.
 void boot(boolean create, java.util.Properties startParams)
          Boot this module with the given properties.
protected  AuthenticationService bootAuthenticationService(boolean create, java.util.Properties props)
           
protected  void bootClassFactory(boolean create, java.util.Properties startParams)
           
protected  void bootResourceAdapter(boolean create, java.util.Properties allParams)
           
protected  void bootStore(boolean create, java.util.Properties startParams)
           
protected  void bootValidation(boolean create, java.util.Properties startParams)
           
 boolean canSupport(java.util.Properties startParams)
          See if this implementation can support any attributes that are listed in properties.
 void checkpoint()
          Checkpoints the database, that is, flushes all dirty data to disk.
protected  void createFinished()
           
 void disableLogArchiveMode(boolean deleteOnlineArchivedLogFiles)
          Disables the log archival process, i.e No old log files will be kept around for a roll-forward recovery.
 void failover(java.lang.String dbname)
          Start failover for the given database.
 void freeze()
          Freeze the database temporarily so a backup can be taken.
protected  java.util.Properties getAllDatabaseProperties()
          Get the set of database properties from the set stored on disk outside of service.properties.
 AuthenticationService getAuthenticationService()
          This method returns the authentication service handle for the database.
protected  java.lang.String getClasspath(java.util.Properties startParams)
           
protected  TransactionController getConnectionTransaction(ContextManager cm)
           
 java.util.Locale getCurrentLocale()
           
 DataDictionary getDataDictionary()
          Return the DataDictionary for this database, set up at boot time.
 java.text.DateFormat getDateFormat()
          Get a formatter for formatting dates.
 int getEngineType()
          Return the engine type that this Database implementation supports.
 UUID getId()
          Deprecated.  
 StorageFile getJarFile(java.lang.String schemaName, java.lang.String sqlName)
          Get the StorageFile for an installed jar file.
 java.util.Locale getLocale()
          Get the Locale for this database.
 java.lang.Object getResourceAdapter()
          Get a Resource Adapter - only used by XA system.
 java.text.DateFormat getTimeFormat()
          Get a formatter for formatting times.
 java.text.DateFormat getTimestampFormat()
          Get a formatter for formatting timestamps.
 void init(boolean dbOnly, java.util.Dictionary p)
          Initialize the properties for this callback.
 boolean isActive()
          Is the database active (open).
 boolean isInSlaveMode()
          Used to indicated whether the database is in the replication slave mode.
 boolean isReadOnly()
          Tells whether the Database is configured as read-only, or the Database was started in read-only mode.
protected  UUID makeDatabaseID(boolean create, java.util.Properties startParams)
           
 java.io.Serializable map(java.lang.String key, java.io.Serializable value, java.util.Dictionary p)
          Map a proposed new value for a property to an official value.
private static StandardException noLocale()
           
protected  void pushClassFactoryContext(ContextManager cm, ClassFactory cf)
           
 void pushDbContext(ContextManager cm)
          Push a DbContext onto the provided context stack.
 void setLocale(java.util.Locale locale)
          Set the Locale that is returned by this LocaleFinder
 LanguageConnectionContext setupConnection(ContextManager cm, java.lang.String user, java.lang.String drdaID, java.lang.String dbname)
          Sets up a connection to the Database, owned by the given user.
 void startReplicationMaster(java.lang.String dbmaster, java.lang.String host, int port, java.lang.String replicationMode)
          Start the replication master role for this database
 void stop()
          Stop the module.
 void stopReplicationMaster()
          Stop the replication master role for this database.
 void stopReplicationSlave()
          Only a SlaveDatabase can be in replication slave mode.
 void unfreeze()
          Unfreeze the database after a backup has been taken.
 boolean validate(java.lang.String key, java.io.Serializable value, java.util.Dictionary p)
          Validate a property change.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

active

protected boolean active

authenticationService

private AuthenticationService authenticationService

af

protected AccessFactory af

pf

protected PropertyFactory pf

cfDB

protected ClassFactory cfDB

dd

private DataDictionary dd
DataDictionary for this database.


lcf

protected LanguageConnectionFactory lcf

lf

protected LanguageFactory lf

resourceAdapter

protected java.lang.Object resourceAdapter

databaseLocale

private java.util.Locale databaseLocale

dateFormat

private java.text.DateFormat dateFormat

timeFormat

private java.text.DateFormat timeFormat

timestampFormat

private java.text.DateFormat timestampFormat

myUUID

private UUID myUUID

lastToBoot

protected boolean lastToBoot
Constructor Detail

BasicDatabase

public BasicDatabase()
Method Detail

canSupport

public boolean canSupport(java.util.Properties startParams)
Description copied from interface: ModuleSupportable
See if this implementation can support any attributes that are listed in properties. This call may be made on a newly created instance before the boot() method has been called, or after the boot method has been called for a running module.

The module can check for attributes in the properties to see if it can fulfill the required behaviour. E.g. the raw store may define an attribute called RawStore.Recoverable. If a temporary raw store is required the property RawStore.recoverable=false would be added to the properties before calling bootServiceModule. If a raw store cannot support this attribute its canSupport method would return null. Also see the Monitor class's prologue to see how the identifier is used in looking up properties.
Actually a better way maybe to have properties of the form RawStore.Attributes.mandatory=recoverable,smallfootprint and RawStore.Attributes.requested=oltp,fast

Specified by:
canSupport in interface ModuleSupportable
Returns:
true if this instance can be used, false otherwise.

boot

public void boot(boolean create,
                 java.util.Properties startParams)
          throws StandardException
Description copied from interface: ModuleControl
Boot this module with the given properties. Creates a module instance that can be found using the findModule() methods of Monitor. The module can only be found using one of these findModule() methods once this method has returned.

An implementation's boot method can throw StandardException. If it is thrown the module is not registered by the monitor and therefore cannot be found through a findModule(). In this case the module's stop() method is not called, thus throwing this exception must free up any resources.

When create is true the contents of the properties object will be written to the service.properties of the persistent service. Thus any code that requires an entry in service.properties must explicitly place the value in this properties set using the put method.
Typically the properties object contains one or more default properties sets, which are not written out to service.properties. These default sets are how callers modify the create process. In a JDBC connection database create the first set of defaults is a properties object that contains the attributes that were set on the jdbc:derby: URL. This attributes properties set has the second default properties set as its default. This set (which could be null) contains the properties that the user set on their DriverManager.getConnection() call, and are thus not owned by Derby code, and thus must not be modified by Derby code.

When create is false the properties object contains all the properties set in the service.properties file plus a limited number of attributes from the JDBC URL attributes or connection properties set. This avoids properties set by the user compromising the boot process. An example of a property passed in from the JDBC world is the bootPassword for encrypted databases.

Code should not hold onto the passed in properties reference after boot time as its contents may change underneath it. At least after the complete boot is completed, the links to all the default sets will be removed.

Specified by:
boot in interface ModuleControl
Throws:
StandardException - Module cannot be started.
See Also:
Monitor, ModuleFactory

stop

public void stop()
Description copied from interface: ModuleControl
Stop the module. The module may be found via a findModule() method until some time after this method returns. Therefore the factory must be prepared to reject requests to it once it has been stopped. In addition other modules may cache a reference to the module and make requests of it after it has been stopped, these requests should be rejected as well.

Specified by:
stop in interface ModuleControl
See Also:
Monitor, ModuleFactory

getEngineType

public int getEngineType()
Return the engine type that this Database implementation supports. This implementation supports the standard database.


isReadOnly

public boolean isReadOnly()
Description copied from interface: Database
Tells whether the Database is configured as read-only, or the Database was started in read-only mode.

Specified by:
isReadOnly in interface Database
Returns:
TRUE means the Database is read-only, FALSE means it is not read-only.

setupConnection

public LanguageConnectionContext setupConnection(ContextManager cm,
                                                 java.lang.String user,
                                                 java.lang.String drdaID,
                                                 java.lang.String dbname)
                                          throws StandardException
Description copied from interface: Database
Sets up a connection to the Database, owned by the given user. The JDBC version of getConnection takes a URL. The purpose of the URL is to tell the driver where the database system is. By the time we get here, we have found the database system (that's how we're making this method call), so the URL is not necessary to establish the connection here. The driver should remember the URL that was used to establish the connection, so it can implement the DatabaseMetaData.getURL() method.

user - The UserID of the user getting the connection
drdaID - The drda id of the connection (from network server)
dbname - The database name
Returns:
A new LanguageConnectionContext
Throws:
StandardException - thrown if unable to create the connection.

getDataDictionary

public final DataDictionary getDataDictionary()
Return the DataDictionary for this database, set up at boot time.


pushDbContext

public void pushDbContext(ContextManager cm)
Description copied from interface: Database
Push a DbContext onto the provided context stack. This conext will shut down the database in case of a DatabaseException being cleaned up.


getAuthenticationService

public AuthenticationService getAuthenticationService()
                                               throws StandardException
Description copied from interface: Database
This method returns the authentication service handle for the database. NOTE: There is always a Authentication Service per database and at the system level.

Returns:
The authentication service handle for the database
Throws:
StandardException

startReplicationMaster

public void startReplicationMaster(java.lang.String dbmaster,
                                   java.lang.String host,
                                   int port,
                                   java.lang.String replicationMode)
                            throws java.sql.SQLException
Start the replication master role for this database

Parameters:
dbmaster - The master database that is being replicated.
host - The hostname for the slave
port - The port the slave is listening on
replicationMode - The type of replication contract. Currently only asynchronous replication is supported, but 1-safe/2-safe/very-safe modes may be added later.
Throws:
java.sql.SQLException - Thrown on error

stopReplicationMaster

public void stopReplicationMaster()
                           throws java.sql.SQLException
Stop the replication master role for this database.

Throws:
java.sql.SQLException - Thrown on error

stopReplicationSlave

public void stopReplicationSlave()
                          throws java.sql.SQLException
Only a SlaveDatabase can be in replication slave mode. Always throws an exception

Throws:
java.sql.SQLException - Always thrown because BasicDatabase cannot be in replication slave mode

isInSlaveMode

public boolean isInSlaveMode()
Description copied from interface: Database
Used to indicated whether the database is in the replication slave mode.

Returns:
true if this database is in replication slave mode, false otherwise.

failover

public void failover(java.lang.String dbname)
              throws StandardException
Description copied from interface: Database
Start failover for the given database.

Parameters:
dbname - the replication database that is being failed over.
Throws:
StandardException - 1) If the failover succeeds, an exception is thrown to indicate that the master database was shutdown after a successful failover 2) If a failure occurs during network communication with slave.
See Also:
Database.failover(String)

freeze

public void freeze()
            throws java.sql.SQLException
Description copied from interface: Database
Freeze the database temporarily so a backup can be taken.

Please see the Derby documentation on backup and restore.

Specified by:
freeze in interface Database
Throws:
java.sql.SQLException - Thrown on error

unfreeze

public void unfreeze()
              throws java.sql.SQLException
Description copied from interface: Database
Unfreeze the database after a backup has been taken.

Please see the Derby documentation on backup and restore.

Specified by:
unfreeze in interface Database
Throws:
java.sql.SQLException - Thrown on error

backup

public void backup(java.lang.String backupDir,
                   boolean wait)
            throws java.sql.SQLException
Description copied from interface: Database
Backup the database to a backup directory. See online documentation for more detail about how to use this feature.

Specified by:
backup in interface Database
Parameters:
backupDir - the directory name where the database backup should go. This directory will be created if not it does not exist.
wait - if true, waits for all the backup blocking operations in progress to finish.
Throws:
java.sql.SQLException - Thrown on error

backupAndEnableLogArchiveMode

public void backupAndEnableLogArchiveMode(java.lang.String backupDir,
                                          boolean deleteOnlineArchivedLogFiles,
                                          boolean wait)
                                   throws java.sql.SQLException
Description copied from interface: Database
Backup the database to a backup directory and enable the log archive mode that will keep the archived log files required for roll-forward from this version backup.

Specified by:
backupAndEnableLogArchiveMode in interface Database
Parameters:
backupDir - The directory name where the database backup should go. This directory will be created if it does not exist.
deleteOnlineArchivedLogFiles - If true deletes online archived log files that exist before this backup; otherwise they will not be deleted. Deletion will occur only after backup is complete.
wait - if true, waits for all the backup blocking operations in progress to finish.
Throws:
java.sql.SQLException - Thrown on error

disableLogArchiveMode

public void disableLogArchiveMode(boolean deleteOnlineArchivedLogFiles)
                           throws java.sql.SQLException
Description copied from interface: Database
Disables the log archival process, i.e No old log files will be kept around for a roll-forward recovery. Only restore that can be performed after disabling log archive mode is version recovery.

Specified by:
disableLogArchiveMode in interface Database
Parameters:
deleteOnlineArchivedLogFiles - If true deletes all online archived log files that exist before this call immediately; otherwise they will not be deleted.
Throws:
java.sql.SQLException - Thrown on error

checkpoint

public void checkpoint()
                throws java.sql.SQLException
Description copied from interface: Database
Checkpoints the database, that is, flushes all dirty data to disk. Records a checkpoint in the transaction log, if there is a log.

Specified by:
checkpoint in interface Database
Throws:
java.sql.SQLException - Thrown on error

getLocale

public java.util.Locale getLocale()
Description copied from interface: Database
Get the Locale for this database.

Specified by:
getLocale in interface Database

getId

public final UUID getId()
Deprecated. 

Return the UUID of this database.

Specified by:
getId in interface Database

getCurrentLocale

public java.util.Locale getCurrentLocale()
                                  throws StandardException
Specified by:
getCurrentLocale in interface LocaleFinder
Throws:
StandardException - Thrown on error

getDateFormat

public java.text.DateFormat getDateFormat()
                                   throws StandardException
Description copied from interface: LocaleFinder
Get a formatter for formatting dates. The implementation may cache this value, since it never changes for a given Locale.

Specified by:
getDateFormat in interface LocaleFinder
Throws:
StandardException - Thrown on error

getTimeFormat

public java.text.DateFormat getTimeFormat()
                                   throws StandardException
Description copied from interface: LocaleFinder
Get a formatter for formatting times. The implementation may cache this value, since it never changes for a given Locale.

Specified by:
getTimeFormat in interface LocaleFinder
Throws:
StandardException - Thrown on error

getTimestampFormat

public java.text.DateFormat getTimestampFormat()
                                        throws StandardException
Description copied from interface: LocaleFinder
Get a formatter for formatting timestamps. The implementation may cache this value, since it never changes for a given Locale.

Specified by:
getTimestampFormat in interface LocaleFinder
Throws:
StandardException - Thrown on error

noLocale

private static StandardException noLocale()

setLocale

public void setLocale(java.util.Locale locale)
Description copied from interface: Database
Set the Locale that is returned by this LocaleFinder


isActive

public boolean isActive()
Is the database active (open).


makeDatabaseID

protected UUID makeDatabaseID(boolean create,
                              java.util.Properties startParams)
                       throws StandardException
Throws:
StandardException

getResourceAdapter

public java.lang.Object getResourceAdapter()
Description copied from interface: Database
Get a Resource Adapter - only used by XA system. There is one and only one resource adapter per Derby database.

Returns:
the resource Adapter for the database, null if no resource adapter is available for this database. Returned as an Object so that non-XA aggressive JVMs such as Chai don't get ClassNotFound. caller must cast result to ResourceAdapter.

init

public void init(boolean dbOnly,
                 java.util.Dictionary p)
Description copied from interface: PropertySetCallback
Initialize the properties for this callback. Called when addPropertySetNotification() is called with a non-null transaction controller. This allows code to set read its initial property values at boot time.

Code within an init() method should use the 3 argument PropertyUtil method getPropertyFromSet() to obtain a property's value.

Specified by:
init in interface PropertySetCallback
Parameters:
dbOnly - true if only per-database properties are to be looked at
p - the complete set of per-database properties.

validate

public boolean validate(java.lang.String key,
                        java.io.Serializable value,
                        java.util.Dictionary p)
                 throws StandardException
Description copied from interface: PropertySetCallback
Validate a property change.

Specified by:
validate in interface PropertySetCallback
Parameters:
key - Property key for the property being set
value - proposed new value for the property being set or null if the property is being dropped.
p - Property set before the change. SettingProperty may read but must never change p.
Returns:
true if this object was interested in this property, false otherwise.
Throws:
StandardException - Thrown on error.
See Also:
PropertySetCallback.validate(java.lang.String, java.io.Serializable, java.util.Dictionary)

apply

public Serviceable apply(java.lang.String key,
                         java.io.Serializable value,
                         java.util.Dictionary p)
                  throws StandardException
Description copied from interface: PropertySetCallback
Apply a property change. Will only be called after validate has been called and only if validate returned true. If this method is called then the new value is the value to be used, ie. the property is not set in the overriding JVM system set.

Specified by:
apply in interface PropertySetCallback
Parameters:
key - Property key for the property being set
value - proposed new value for the property being set or null if the property is being dropped.
p - Property set before the change. SettingProperty may read but must never change p.
Returns:
post commit work for the property change.
Throws:
StandardException - Thrown on error.
See Also:
PropertySetCallback.apply(java.lang.String, java.io.Serializable, java.util.Dictionary)

map

public java.io.Serializable map(java.lang.String key,
                                java.io.Serializable value,
                                java.util.Dictionary p)
Description copied from interface: PropertySetCallback
Map a proposed new value for a property to an official value. Will only be called after apply() has been called.

Specified by:
map in interface PropertySetCallback
Parameters:
key - Property key for the property being set
value - proposed new value for the property being set or null if the property is being dropped.
p - Property set before the change. SettingProperty may read but must never change p.
Returns:
new value for the change
See Also:
PropertySetCallback.map(java.lang.String, java.io.Serializable, java.util.Dictionary)

createFinished

protected void createFinished()
                       throws StandardException
Throws:
StandardException

getClasspath

protected java.lang.String getClasspath(java.util.Properties startParams)

bootClassFactory

protected void bootClassFactory(boolean create,
                                java.util.Properties startParams)
                         throws StandardException
Throws:
StandardException

getConnectionTransaction

protected TransactionController getConnectionTransaction(ContextManager cm)
                                                  throws StandardException
Throws:
StandardException

bootAuthenticationService

protected AuthenticationService bootAuthenticationService(boolean create,
                                                          java.util.Properties props)
                                                   throws StandardException
Throws:
StandardException

bootValidation

protected void bootValidation(boolean create,
                              java.util.Properties startParams)
                       throws StandardException
Throws:
StandardException

bootStore

protected void bootStore(boolean create,
                         java.util.Properties startParams)
                  throws StandardException
Throws:
StandardException

getAllDatabaseProperties

protected java.util.Properties getAllDatabaseProperties()
                                                 throws StandardException
Get the set of database properties from the set stored on disk outside of service.properties.

Throws:
StandardException

bootResourceAdapter

protected void bootResourceAdapter(boolean create,
                                   java.util.Properties allParams)

pushClassFactoryContext

protected void pushClassFactoryContext(ContextManager cm,
                                       ClassFactory cf)

getJarFile

public StorageFile getJarFile(java.lang.String schemaName,
                              java.lang.String sqlName)
                       throws StandardException
Description copied from interface: JarReader
Get the StorageFile for an installed jar file.

Specified by:
getJarFile in interface JarReader
Throws:
StandardException

Built on Thu 2011-03-10 11:54:14+0000, from revision ???

Apache Derby V10.6 Internals - Copyright © 2004,2007 The Apache Software Foundation. All Rights Reserved.