org.apache.ojb.odmg.locking
Class LockEntry

java.lang.Object
  org.apache.ojb.odmg.locking.LockEntry

All Implemented Interfaces:

Serializable

public class LockEntry
extends Object
implements 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

private int	isolationLevel the isolationlevel for this lock.
static int	LOCK_READ marks a Read Lock.
static int	LOCK_WRITE marks a Write Lock.
private int	lockType marks if this is a read or a write lock.
private String	oidString the unique OID of the object to be locked.
(package private) static long	serialVersionUID
private long	timestamp the timestamp marking the time of acquisition of this lock
private String	transactionId the GUID of the transaction that holds the lock

Constructor Summary

LockEntry()
default constructor

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

LockEntry(String oidString, 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.
String	getOidString() returns the OID STring of the locked object.
long	getTimestamp() returns the timestamp of the acqusition of the lock.
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	setIsolationLevel(int isolationLevel) Sets the isolationLevel.
void	setLockType(int locktype) sets the locktype of this lockentry.
void	setOidString(String oidString) Sets the oidString.
void	setTimestamp(long timestamp) Sets the timestamp.
void	setTransactionId(String transactionId) Sets the transactionId.

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

static final long serialVersionUID

See Also:

Constant Field Values

LOCK_READ

public static int LOCK_READ

marks a Read Lock.

LOCK_WRITE

public static int LOCK_WRITE

marks a Write Lock.

oidString

private String oidString

the unique OID of the object to be locked.

transactionId

private String transactionId

the GUID of the transaction that holds the lock

timestamp

private long timestamp

the timestamp marking the time of acquisition of this lock

isolationLevel

private int isolationLevel

the isolationlevel for this lock.

lockType

private int lockType

marks if this is a read or a write lock. LOCK_READ = 0; LOCK_WRITE = 1;

Constructor Detail

LockEntry

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

Multiargument constructor for fast loading of LockEntries by OJB.

LockEntry

public LockEntry(String oidString,
                 String transactionId)

build a LockEntry from an OID and a Transaction ID

LockEntry

public LockEntry()

default constructor

Method Detail

getOidString

public String getOidString()

returns the OID STring of the locked object.

getTransactionId

public 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.

setIsolationLevel

public void setIsolationLevel(int isolationLevel)

Sets the isolationLevel.

Parameters:

isolationLevel - The isolationLevel to set

setOidString

public void setOidString(String oidString)

Sets the oidString.

Parameters:

oidString - The oidString to set

setTimestamp

public void setTimestamp(long timestamp)

Sets the timestamp.

Parameters:

timestamp - The timestamp to set

setTransactionId

public void setTransactionId(String transactionId)

Sets the transactionId.

Parameters:

transactionId - The transactionId to set