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java.lang.Object | +--java.lang.Thread | +--pl.edu.pjwstk.yaod.system.processes.DBWR
Klasa procesu DBWR (od database writer). Proces DBWR zajmuje sie przenoszeniem zawartosci bufora atomow do bufora stron, a bufora blokow na dysk (jesli sklad obsluguje dostep blokowy).
Fields inherited from class java.lang.Thread |
MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY |
Constructor Summary | |
DBWR(DatabaseManager manager)
Tworzy nowy obiekt DBWR. |
Method Summary | |
void |
doCheckpoint()
Wykonuje punkt kontrolny, czyli zapisuje z buforow wszystkie atomy do blokow, a bloki na nosnik (jesli jest obsluga blokow). |
Wrappable |
getStoreByID(int id)
Zwraca oslone skladu o podanym identyfikatorze. |
void |
run()
Petla watku. |
void |
setWork(boolean status)
Ustawia wartosc flagi, ktora nakazuje watkowi prace lub zatrzymanie sie. |
void |
startDBWR()
Uruchamia proces (watek) dbwr. |
void |
stopDBWR()
Zatrzymuje proces (watek) dbwr. |
Methods inherited from class java.lang.Thread |
activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
public DBWR(DatabaseManager manager)
manager
- menedzer bazy danych, do ktorego nalezy dbwr.Method Detail |
public Wrappable getStoreByID(int id)
id
- identyfikator skladu.public void startDBWR()
public void stopDBWR()
public void setWork(boolean status)
status
- pracuj (true), zatrzymaj sie (false)public void doCheckpoint()
public void run()
run
in class java.lang.Thread
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