Package com.opencloud.slee.resources.dbquery

Enum QueryInfo.RetryBehaviour

java.lang.Object

java.lang.Enum<QueryInfo.RetryBehaviour>

com.opencloud.slee.resources.dbquery.QueryInfo.RetryBehaviour

All Implemented Interfaces:

Serializable, Comparable<QueryInfo.RetryBehaviour>

Enclosing interface:

QueryInfo

public static enum QueryInfo.RetryBehaviour
extends Enum<QueryInfo.RetryBehaviour>

Retry behaviour options in the case of multiple data sources.

Since:

1.2

Enum Constant Summary

Enum Constants

Enum Constant	Description
TRY_ALL	All configured data sources will be tried, whether the previous one failed or was marked as unavailable.
TRY_FIRST_AVAILABLE	The first available data source will be tried, but if it fails the request will not be retried on subsequent data sources.
TRY_FIRST_ONLY	Only the first data source will ever be tried.

Method Summary

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

TRY_ALL

public static final QueryInfo.RetryBehaviour TRY_ALL

All configured data sources will be tried, whether the previous one failed or was marked as unavailable.

Typical scenario: read-only requests where every attempt should be made to read the data.

TRY_FIRST_AVAILABLE

public static final QueryInfo.RetryBehaviour TRY_FIRST_AVAILABLE

The first available data source will be tried, but if it fails the request will not be retried on subsequent data sources.

Typical scenario: updates to a database that can receive replicated data from a backup during recovery so the update can be safely attempted on either the primary or the secondary data source but not both.

TRY_FIRST_ONLY

public static final QueryInfo.RetryBehaviour TRY_FIRST_ONLY

Only the first data source will ever be tried. If it is unavailable the request will not be sent.

Typical scenario: updates to a master database with a read-only backup database, which cannot replicate data back to the master database.

Method Detail

values

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

Returns:

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

valueOf

public static QueryInfo.RetryBehaviour 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