Package com.streambase.sb.operator

Enum TransactionIsolationLevel

java.lang.Object

java.lang.Enum<TransactionIsolationLevel>

com.streambase.sb.operator.TransactionIsolationLevel

All Implemented Interfaces:

Serializable, Comparable<TransactionIsolationLevel>

public enum TransactionIsolationLevel
extends Enum<TransactionIsolationLevel>

This describes the server's transaction isolation level (only meaningful for com.streambase.sb.operator.StorageMethod.TRANSACTIONAL_MEMORY)

Since:

10.2

Enum Constant Summary

Enum Constants

Enum Constant	Description
READ_COMMITTED_SNAPSHOT	Modifications are only visible outside of the current transaction when it commits.
SERIALIZABLE	Modifications are only visible outside of the current transaction when it commits.

Method Summary

Modifier and Type	Method	Description
static TransactionIsolationLevel	valueOf(String name)	Returns the enum constant of this type with the specified name.
static TransactionIsolationLevel[]	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

READ_COMMITTED_SNAPSHOT

public static final TransactionIsolationLevel READ_COMMITTED_SNAPSHOT

Modifications are only visible outside of the current transaction when it commits. Snapshots are taken from the last committed transaction (i.e. It is not a dirty read) to ensure read consistency during a transaction. No transaction read locks are taken during the transaction allowing modifications to occur while reading the data.

SERIALIZABLE

public static final TransactionIsolationLevel SERIALIZABLE

Modifications are only visible outside of the current transaction when it commits. Transaction read locks are taken for the duration of the transaction to ensure read consistency. All writes are blocked while a transaction read lock is held.

Method Detail

values

public static TransactionIsolationLevel[] 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 (TransactionIsolationLevel c : TransactionIsolationLevel.values())
    System.out.println(c);

Returns:

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

valueOf

public static TransactionIsolationLevel valueOf(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:

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

NullPointerException - if the argument is null