FifoEvictionPolicyFactory (Ignite 2.17.0)

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

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method 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()
```