oracle.jdbc

Enum OracleConnection.TransactionPriority

java.lang.Object

java.lang.Enum<OracleConnection.TransactionPriority>

oracle.jdbc.OracleConnection.TransactionPriority

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<OracleConnection.TransactionPriority>

Enclosing interface:

OracleConnection

public static enum OracleConnection.TransactionPriority
extends java.lang.Enum<OracleConnection.TransactionPriority>

This enum is used to specify a priority (HIGH, MEDIUM or LOW) to all transactions in a particular connection.

The Transaction Priority feature automatically rolls back low-priority transactions that are preventing higher priority transactions from obtaining row locks.

Since:

23.26.3

See Also:

OracleConnection.setTransactionPriority(TransactionPriority), OracleConnection.CONNECTION_PROPERTY_TRANSACTION_PRIORITY

Enum Constant Summary

Enum Constants

Enum Constant and Description
HIGH HIGH Transaction Priority never rolls back a HIGH priority transaction in order to release a row lock for another transaction.
LOW Use LOW to mark a transaction that has low priority.
MEDIUM Transaction Priority will roll back a MEDIUM priority transaction if it is holding a row lock required by a HIGH priority transaction, and the HIGH priority transaction has been waiting for the row lock longer than the time specified by the PRIORITY_TXNS_HIGH_WAIT_TARGET parameter in the database.

Method Summary

Modifier and Type	Method and Description
static OracleConnection.TransactionPriority	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static OracleConnection.TransactionPriority[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

LOW

public static final OracleConnection.TransactionPriority LOW

Use LOW to mark a transaction that has low priority. Such a low priority transaction will be rolled back if it's holding a lock that is required by a higher priority transaction that has been waiting longer than its target wait time (see PRIORITY_TXNS_HIGH_WAIT_TARGET and PRIORITY_TXNS_MEDIUM_WAIT_TARGET database parameters).

MEDIUM

public static final OracleConnection.TransactionPriority MEDIUM

Transaction Priority will roll back a MEDIUM priority transaction if it is holding a row lock required by a HIGH priority transaction, and the HIGH priority transaction has been waiting for the row lock longer than the time specified by the PRIORITY_TXNS_HIGH_WAIT_TARGET parameter in the database.

HIGH

public static final OracleConnection.TransactionPriority HIGH

HIGH Transaction Priority never rolls back a HIGH priority transaction in order to release a row lock for another transaction. This is the default.

Method Detail

values

public static OracleConnection.TransactionPriority[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (OracleConnection.TransactionPriority c : OracleConnection.TransactionPriority.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static OracleConnection.TransactionPriority valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null