org.apache.ignite.cache.eviction.fifo

Class FifoEvictionPolicyFactory<K,V>

java.lang.Object

org.apache.ignite.cache.eviction.AbstractEvictionPolicyFactory<FifoEvictionPolicy<K,V>>

org.apache.ignite.cache.eviction.fifo.FifoEvictionPolicyFactory<K,V>

All Implemented Interfaces:

Serializable, javax.cache.configuration.Factory<FifoEvictionPolicy<K,V>>

public class FifoEvictionPolicyFactory<K,V>
extends AbstractEvictionPolicyFactory<FifoEvictionPolicy<K,V>>

Factory class for FifoEvictionPolicy. Creates cache Eviction policy based on First In First Out (FIFO) algorithm and supports batch eviction.

The eviction starts in the following cases:

• The cache size becomes batchSize elements greater than the maximum size.
• The size of cache entries in bytes becomes greater than the maximum memory size. The size of cache entry calculates as sum of key size and value size.

Note:Batch eviction is enabled only if maximum memory limit isn't set (maxMemSize == 0). batchSize elements will be evicted in this case. The default batchSize value is 1.

FifoEvictionPolicy implementation is very efficient since it does not create any additional table-like data structures. The FIFO ordering information is maintained by attaching ordering metadata to cache entries.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
FifoEvictionPolicyFactory() Constructor.
FifoEvictionPolicyFactory(int maxSize) Constructor.
FifoEvictionPolicyFactory(int maxSize, int batchSize, long maxMemSize)

Method Summary

Modifier and Type	Method and Description
FifoEvictionPolicy<K,V>	create()

Methods inherited from class org.apache.ignite.cache.eviction.AbstractEvictionPolicyFactory

getBatchSize, getMaxMemorySize, getMaxSize, setBatchSize, setMaxMemorySize, setMaxSize

Methods inherited from class java.lang.Object

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

Constructor Detail

FifoEvictionPolicyFactory

public FifoEvictionPolicyFactory()

Constructor.

FifoEvictionPolicyFactory

public FifoEvictionPolicyFactory(int maxSize)

Constructor.

Parameters:

maxSize - Maximum allowed size of cache before entry will start getting evicted.

FifoEvictionPolicyFactory

public FifoEvictionPolicyFactory(int maxSize,
                                 int batchSize,
                                 long maxMemSize)

Parameters:

maxSize - Maximum allowed size of cache before entry will start getting evicted.

batchSize - Batch size.

maxMemSize - Sets maximum allowed cache size in bytes.

Method Detail

create

public FifoEvictionPolicy<K,V> create()