Database
, Database
, LocaleFinder
, JarReader
, ModuleControl
, ModuleSupportable
, PropertySetCallback
public class SlaveDatabase extends BasicDatabase
Modifier and Type | Class | Description |
---|---|---|
private class |
SlaveDatabase.SlaveDatabaseBootThread |
Thread that boots the slave database.
|
Modifier and Type | Field | Description |
---|---|---|
private StandardException |
bootException |
Set by the database boot thread if it fails before slave mode
has been started properly (i.e., if inBoot is true).
|
private java.lang.String |
dbname |
|
private boolean |
inBoot |
True until this database has been successfully booted.
|
private boolean |
inReplicationSlaveMode |
True until SlaveDatabaseBootThread has successfully booted the
database.
|
private boolean |
shutdownInitiated |
|
private SlaveFactory |
slaveFac |
active, af, cfDB, lastToBoot, lcf, lf, pf, resourceAdapter
LUCENE_DIR
Constructor | Description |
---|---|
SlaveDatabase() |
Modifier and Type | Method | Description |
---|---|---|
void |
boot(boolean create,
java.util.Properties startParams) |
Boot this module with the given properties.
|
private void |
bootBasicDatabase(boolean create,
java.util.Properties params) |
|
boolean |
canSupport(java.util.Properties startParams) |
Determines whether this Database implementation should be used
to boot the database.
|
void |
failover(java.lang.String dbname) |
Start failover for the given database.
|
private static java.lang.Object |
findServiceModule(java.lang.Object serviceModule,
java.lang.String factoryInterface) |
Privileged startup.
|
AuthenticationService |
getAuthenticationService() |
This method returns the authentication service handle for the
database.
|
private static ContextService |
getContextService() |
Privileged lookup of the ContextService.
|
private void |
handleShutdown(StandardException shutdownCause) |
Used to shutdown this database.
|
boolean |
isInSlaveMode() |
Used to indicated whether the database is in the replication
slave mode.
|
private boolean |
isSlaveFactorySet() |
If slaveFac (the reference to the SlaveFactory) has not already
been set, this method will try to set it by calling
Monitor.findServiceModule.
|
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 |
stop() |
Called by Monitor when this module is stopped, i.e. when the
database is shut down.
|
void |
stopReplicationSlave() |
Stop replication slave mode if replication slave mode is active and
the network connection with the master is down
|
void |
verifyShutdownSlave() |
Verify that a connection to stop the slave has been made from
here.
|
private void |
verifySuccessfulBoot() |
Verify that the slave functionality has been properly started.
|
apply, backup, backupAndEnableLogArchiveMode, bootAuthenticationService, bootClassFactory, bootResourceAdapter, bootStore, bootValidation, checkpoint, createFinished, disableLogArchiveMode, freeze, getAllDatabaseProperties, getClasspath, getConnectionTransaction, getCurrentLocale, getDataDictionary, getDateFormat, getEngineType, getId, getJarFile, getLocale, getResourceAdapter, getTimeFormat, getTimestampFormat, init, isActive, isReadOnly, makeDatabaseID, map, pushClassFactoryContext, pushDbContext, setLocale, startReplicationMaster, stopReplicationMaster, unfreeze, validate
private volatile boolean inReplicationSlaveMode
private volatile boolean shutdownInitiated
private volatile boolean inBoot
private volatile StandardException bootException
private java.lang.String dbname
private volatile SlaveFactory slaveFac
public boolean canSupport(java.util.Properties startParams)
canSupport
in interface ModuleSupportable
canSupport
in class BasicDatabase
startParams
- The properties used to decide if
SlaveDatabase is the correct implementation of Database for the
database to be booted.public void boot(boolean create, java.util.Properties startParams) throws StandardException
ModuleControl
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.
boot
in interface ModuleControl
boot
in class BasicDatabase
StandardException
- Module cannot be started.Monitor
,
ModuleFactory
public void stop()
stop
in interface ModuleControl
stop
in class BasicDatabase
Monitor
,
ModuleFactory
public boolean isInSlaveMode()
Database
isInSlaveMode
in interface Database
isInSlaveMode
in class BasicDatabase
public LanguageConnectionContext setupConnection(ContextManager cm, java.lang.String user, java.lang.String drdaID, java.lang.String dbname) throws StandardException
Database
setupConnection
in interface Database
setupConnection
in class BasicDatabase
user
- The UserID of the user getting the connectiondrdaID
- The drda id of the connection (from network server)dbname
- The database nameStandardException
- thrown if unable to create the connection.public AuthenticationService getAuthenticationService() throws StandardException
Database
getAuthenticationService
in interface Database
getAuthenticationService
in class BasicDatabase
StandardException
- standard Derby exception policypublic void verifyShutdownSlave() throws StandardException
StandardException
- Thrown if a stop slave connection
attempt was not made from this classpublic void stopReplicationSlave() throws java.sql.SQLException
stopReplicationSlave
in interface Database
stopReplicationSlave
in class BasicDatabase
java.sql.SQLException
- Thrown on error, if not in replication
slave mode or if the network connection with the master is not downpublic void failover(java.lang.String dbname) throws StandardException
Database
failover
in interface Database
failover
in class BasicDatabase
dbname
- the replication database that is being failed over.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.Database.failover(String)
private void verifySuccessfulBoot() throws StandardException
StandardException
private boolean isSlaveFactorySet()
private void handleShutdown(StandardException shutdownCause)
shutdownCause
- the reason why the database needs to be
shutdownprivate void bootBasicDatabase(boolean create, java.util.Properties params) throws StandardException
StandardException
private static ContextService getContextService()
private static java.lang.Object findServiceModule(java.lang.Object serviceModule, java.lang.String factoryInterface) throws StandardException
StandardException
Apache Derby V10.14 Internals - Copyright © 2004,2018 The Apache Software Foundation. All Rights Reserved.