/** Releases whatever locks are on the database change log table */
public void forceReleaseLock() throws LockException, DatabaseException {
database.checkDatabaseChangeLogLockTable();
releaseLock();
/*try {
releaseLock();
} catch (LockException e) {
// ignore ?
LogFactory.getLogger().info("Ignored exception in forceReleaseLock: " + e.getMessage());
}*/
}
public boolean acquireLock() throws DatabaseException, LockException {
if (hasChangeLogLock) {
return true;
}
Executor executor = ExecutorService.getInstance().getExecutor(database);
try {
database.rollback();
database.checkDatabaseChangeLogLockTable();
Boolean locked =
(Boolean)
ExecutorService.getInstance()
.getExecutor(database)
.queryForObject(
new SelectFromDatabaseChangeLogLockStatement("LOCKED"), Boolean.class);
if (locked) {
return false;
} else {
executor.comment("Lock Database");
int rowsUpdated = executor.update(new LockDatabaseChangeLogStatement());
if (rowsUpdated > 1) {
throw new LockException("Did not update change log lock correctly");
}
if (rowsUpdated == 0) {
// another node was faster
return false;
}
database.commit();
LogFactory.getLogger().info("Successfully acquired change log lock");
hasChangeLogLock = true;
database.setCanCacheLiquibaseTableInfo(true);
return true;
}
} finally {
database.rollback();
}
}
