Constructor and Description |
---|
SimpleSemaphore() |
Modifier and Type | Method and Description |
---|---|
protected org.slf4j.Logger |
getLog() |
boolean |
isLockOwner(Connection conn,
String lockName)
Determine whether the calling thread owns a lock on the identified
resource.
|
boolean |
obtainLock(Connection conn,
String lockName)
Grants a lock on the identified resource to the calling thread (blocking
until it is available).
|
void |
releaseLock(Connection conn,
String lockName)
Release the lock on the identified resource if it is held by the calling
thread.
|
boolean |
requiresConnection()
This Semaphore implementation does not use the database.
|
protected org.slf4j.Logger getLog()
public boolean obtainLock(Connection conn, String lockName)
obtainLock
in interface Semaphore
conn
- Database connection used to establish lock. Can be null if
Semaphore.requiresConnection()
returns false.public void releaseLock(Connection conn, String lockName)
releaseLock
in interface Semaphore
conn
- Database connection used to establish lock. Can be null if
Semaphore.requiresConnection()
returns false.public boolean isLockOwner(Connection conn, String lockName)
isLockOwner
in interface Semaphore
conn
- Database connection used to establish lock. Can be null if
Semaphore.requiresConnection()
returns false.public boolean requiresConnection()
requiresConnection
in interface Semaphore
Semaphore.isLockOwner(Connection, String)
,
Semaphore.obtainLock(Connection, String)
,
Semaphore.releaseLock(Connection, String)
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