org.apache.marmotta.kiwi.config

Enum CacheMode

java.lang.Object

java.lang.Enum<CacheMode>

org.apache.marmotta.kiwi.config.CacheMode

All Implemented Interfaces:

Serializable, Comparable<CacheMode>

public enum CacheMode
extends Enum<CacheMode>

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Author:

Sebastian Schaffert (sschaffert@apache.org)

Enum Constant Summary

Enum Constants

Enum Constant and Description
DISTRIBUTED In distributed cache mode, the cluster forms a big hash table used as a cache.
LOCAL In local cache mode, the cache is not shared among the servers in a cluster.
REPLICATED In replicated cache mode, each node in the cluster has an identical copy of all cache data.

Method Summary

Methods

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

LOCAL

public static final CacheMode LOCAL

In local cache mode, the cache is not shared among the servers in a cluster. Each machine keeps a local cache. This allows quick startups and eliminates network traffic in the cluster, but subsequent requests to different cluster members cannot benefit from the cached data.

DISTRIBUTED

public static final CacheMode DISTRIBUTED

In distributed cache mode, the cluster forms a big hash table used as a cache. This allows to make efficient use of the large amount of memory available, but requires cache rebalancing and a lot of network transfers, especially in case cluster members are restarted often.

REPLICATED

public static final CacheMode REPLICATED

In replicated cache mode, each node in the cluster has an identical copy of all cache data. This allows very efficient cache lookups and reduces the rebalancing effort, but requires more memory.

Method Detail

values

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

Returns:

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

valueOf

public static CacheMode 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