one.edee.darwin.storage

Class TransactionalDatabaseLockStorage

java.lang.Object

one.edee.darwin.storage.AbstractDatabaseStorage

one.edee.darwin.storage.TransactionalDatabaseLockStorage

All Implemented Interfaces:

LockStorage, org.springframework.beans.factory.Aware, org.springframework.beans.factory.InitializingBean, org.springframework.context.ResourceLoaderAware

Direct Known Subclasses:

DefaultDatabaseLockStorage

public abstract class TransactionalDatabaseLockStorage
extends AbstractDatabaseStorage
implements LockStorage

Transaction database implementation. In this implementation is used TransactionTemplate which wraps DB calls so it could be defined, whether Lock persister runs in separate transaction or not. If TransactionTemplate is not provided, direct calls are made (e.g. TransactionManager doesn't exist and so TransactionTemplate simply cannot be created).

Author:

Martin Veska, FG Forrest a.s. (c) 2012

Field Summary

Fields inherited from class one.edee.darwin.storage.AbstractDatabaseStorage

dataSource, dbResourceAccessor, jdbcTemplate, resourceAccessor, resourceLoader, transactionManager

Constructor Summary

Constructors

Constructor and Description
TransactionalDatabaseLockStorage()

Method Summary

Modifier and Type	Method and Description
protected abstract LockState	createDbLock(String processName, LocalDateTime until, String unlockKey)
LockState	createLock(String processName, LocalDateTime until, String unlockKey) Method stores lock.
LocalDateTime	getCurrentDatabaseTime() Returns current database time, that is shared among nodes.
protected abstract LockState	getDbProcessLock(String processName, LocalDateTime currentDate)
LockState	getProcessLock(String processName, LocalDateTime currentDate) Method returns data about existing / nonexistent lock.
protected abstract LockState	releaseDbProcess(String processName, String unlockKey)
LockState	releaseProcess(String processName, String unlockKey) Method releases lock.
protected abstract LockState	renewDbLease(LocalDateTime until, String processName, String unlockKey)
LockState	renewLease(String processName, String unlockKey, LocalDateTime until) Renews lease date for particular process, if you have correct unlock key (otherwise exception is thrown)

Methods inherited from class one.edee.darwin.storage.AbstractDatabaseStorage

afterPropertiesSet, getPlatform, setDataSource, setResourceLoader

Methods inherited from class java.lang.Object

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

Constructor Detail

TransactionalDatabaseLockStorage

public TransactionalDatabaseLockStorage()

Method Detail

getCurrentDatabaseTime

public LocalDateTime getCurrentDatabaseTime()

Description copied from interface: LockStorage

Returns current database time, that is shared among nodes.

Specified by:

getCurrentDatabaseTime in interface LockStorage

getProcessLock

public LockState getProcessLock(String processName,
                                LocalDateTime currentDate)

Description copied from interface: LockStorage

Method returns data about existing / nonexistent lock.

Specified by:

getProcessLock in interface LockStorage

createLock

public LockState createLock(String processName,
                            LocalDateTime until,
                            String unlockKey)

Description copied from interface: LockStorage

Method stores lock.

Specified by:

createLock in interface LockStorage

Parameters:

processName - name of the process we want to lock

until - date until lock should be kept providing no one has unlock it by then

unlockKey - unlock key to be stored with lock

releaseProcess

public LockState releaseProcess(String processName,
                                String unlockKey)

Description copied from interface: LockStorage

Method releases lock.

Specified by:

releaseProcess in interface LockStorage

Parameters:

processName - name of the process we want to unlock

unlockKey - key for unlocking the process

renewLease

public LockState renewLease(String processName,
                            String unlockKey,
                            LocalDateTime until)

Description copied from interface: LockStorage

Renews lease date for particular process, if you have correct unlock key (otherwise exception is thrown)

Specified by:

renewLease in interface LockStorage

getDbProcessLock

protected abstract LockState getDbProcessLock(String processName,
                                              LocalDateTime currentDate)

createDbLock

protected abstract LockState createDbLock(String processName,
                                          LocalDateTime until,
                                          String unlockKey)

releaseDbProcess

protected abstract LockState releaseDbProcess(String processName,
                                              String unlockKey)

renewDbLease

protected abstract LockState renewDbLease(LocalDateTime until,
                                          String processName,
                                          String unlockKey)