DbEnv.lock_detect

APIRef

import com.sleepycat.db.*;

public int lock_detect(int flags, int atype) throws DbException;

Description

The DbEnv.lock_detect method runs one iteration of the deadlock detector. The deadlock detector traverses the lock table, and for each deadlock it finds, marks one of the participating transactions for abort.

The flags value must be set to 0 or by bitwise inclusively OR'ing together one or more of the following values.

Db.DB_LOCK_CONFLICT
Only run the deadlock detector if a lock conflict has occurred since the last time that the deadlock detector was run.

The atype parameter specifies which transaction to abort in the case of deadlock. It must be set to one of possible arguments listed for the DbEnv.set_lk_detect interface.

The DbEnv.lock_detect method returns the number of transactions aborted.

The DbEnv.lock_detect method throws an exception that encapsulates a non-zero error value on failure.

Errors

If a fatal error occurs in Berkeley DB, the DbEnv.lock_detect method will fail and throw a DbRunRecoveryException, at which point all subsequent database calls will fail in the same way.

In addition, the DbEnv.lock_detect method may fail and throw an exception for errors specified for other Berkeley DB and C library or system methods.

Classes

DbEnv, DbLock

See Also

DbEnv.set_lk_conflicts, DbEnv.set_lk_detect, DbEnv.set_lk_max, DbEnv.lock_detect, DbEnv.lock_get, DbEnv.lock_id, DbLock.put and DbEnv.lock_stat.

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