Package com.landawn.abacus.jdbc

Class DBLock

java.lang.Object

com.landawn.abacus.jdbc.DBLock

public final class DBLock
extends Object

Supports global lock by db table.

Since:

0.8

Author:

Haiyang Li

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_LOCK_LIVE_TIME
static final int	DEFAULT_TIMEOUT
static final String	LOCKED
static final String	UNLOCKED

Method Summary

Modifier and Type	Method	Description
void	close()	Close.
String	lock(String target)
String	lock(String target, long timeout)
String	lock(String target, long liveTime, long timeout)
String	lock(String target, long liveTime, long timeout, long retryPeriod)
boolean	unlock(String target, String code)

Methods inherited from class java.lang.Object

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

Field Details

LOCKED

public static final String LOCKED

See Also:

• Constant Field Values

UNLOCKED

public static final String UNLOCKED

See Also:

• Constant Field Values

DEFAULT_LOCK_LIVE_TIME

public static final int DEFAULT_LOCK_LIVE_TIME

See Also:

• Constant Field Values

DEFAULT_TIMEOUT

public static final int DEFAULT_TIMEOUT

See Also:

• Constant Field Values

Method Details

lock

public String lock(String target)

Parameters:

target -

Returns:

lock

public String lock(String target,
 long timeout)

Parameters:

target -

timeout -

Returns:

lock

public String lock(String target,
 long liveTime,
 long timeout)

Parameters:

target -

liveTime -

timeout -

Returns:

lock

public String lock(String target,
 long liveTime,
 long timeout,
 long retryPeriod)

Parameters:

target -

liveTime -

timeout -

retryPeriod - the period to retry inserting record in database table to lock the target.

Returns:

null if the target can't be locked in the period specified by timeout

unlock

public boolean unlock(String target,
 String code)

Parameters:

target -

code -

Returns:

true, if successful

close

public void close()

Close.