ojb.odmg.locking
Class LockEntry

java.lang.Object
  |
  +--ojb.odmg.locking.LockEntry

All Implemented Interfaces:

java.io.Serializable

public class LockEntry

extends java.lang.Object

implements java.io.Serializable

a persistent entry for locks. All locks that are hold from transaction on objects are represented by a LockENtry and made persistent to the database.

Author:

Thomas Mahler

See Also:

Serialized Form

Field Summary

static int	LOCK_READ marks a Read Lock.
static int	LOCK_WRITE marks a Write Lock.

Constructor Summary

LockEntry()
default constructor

LockEntry(java.lang.String oidString, java.lang.String transactionId)
build a LockEntry from an OID and a Transaction ID

LockEntry(java.lang.String oidString, java.lang.String transactionId, long timestamp, int isolationLevel, int lockType)
Multiargument constructor for fast loading of LockEntries by OJB.

Method Summary

int	getIsolationLevel() returns the isolation level of this lock
int	getLockType() returns the locktype of this lock.
java.lang.String	getOidString() returns the OID STring of the locked object.
long	getTimestamp() returns the timestamp of the acqusition of the lock.
java.lang.String	getTransactionId() returns the GUID string of the locking transaction.
boolean	isOwnedBy(TransactionImpl tx) returns true if this lock is owned by transaction tx, else false.
void	setLockType(int locktype) sets the locktype of this lockentry.

Methods inherited from class java.lang.Object

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

Field Detail

LOCK_READ

public static int LOCK_READ

marks a Read Lock.

LOCK_WRITE

public static int LOCK_WRITE

marks a Write Lock.

Constructor Detail

LockEntry

public LockEntry(java.lang.String oidString,
                 java.lang.String transactionId,
                 long timestamp,
                 int isolationLevel,
                 int lockType)

Multiargument constructor for fast loading of LockEntries by OJB.

LockEntry

public LockEntry(java.lang.String oidString,
                 java.lang.String transactionId)

build a LockEntry from an OID and a Transaction ID

LockEntry

public LockEntry()

default constructor

Method Detail

getOidString

public java.lang.String getOidString()

returns the OID STring of the locked object.

getTransactionId

public java.lang.String getTransactionId()

returns the GUID string of the locking transaction.

getTimestamp

public long getTimestamp()

returns the timestamp of the acqusition of the lock.

getIsolationLevel

public int getIsolationLevel()

returns the isolation level of this lock

getLockType

public int getLockType()

returns the locktype of this lock.

Returns:

LOCK_READ if lock is a readlock, LOCK_WRITE if lock is a Write lock.

setLockType

public void setLockType(int locktype)

sets the locktype of this lockentry.

Parameters:

locktype - LOCK_READ for read, LOCK_WRITE for write lock.

isOwnedBy

public boolean isOwnedBy(TransactionImpl tx)

returns true if this lock is owned by transaction tx, else false.