Module spring.retry

Package org.springframework.retry.policy

Class SoftReferenceMapRetryContextCache

java.lang.Object

org.springframework.retry.policy.AbstractMapRetryContextCache<SoftReference<RetryContext>>

org.springframework.retry.policy.SoftReferenceMapRetryContextCache

All Implemented Interfaces:

RetryContextCache

public class SoftReferenceMapRetryContextCache
extends AbstractMapRetryContextCache<SoftReference<RetryContext>>

Map-based implementation of RetryContextCache. The map backing the cache of contexts is synchronized and its entries are soft-referenced, so may be garbage collected under pressure.

Author:

Dave Syer

See Also:

• for non-soft referenced version

Field Summary

Fields inherited from class org.springframework.retry.policy.AbstractMapRetryContextCache

DEFAULT_CAPACITY

Constructor Summary

Constructors

Constructor	Description
SoftReferenceMapRetryContextCache()	Create an instance with the default capacity
SoftReferenceMapRetryContextCache(int capacity)	Create an instance with the given capacity, removing the eldest entries when the cache is full
SoftReferenceMapRetryContextCache(int capacity, boolean removeEldestEntries)	Create an instance with the given capacity and the policy to apply when the cache is full.

Method Summary

Modifier and Type	Method	Description
boolean	containsKey(Object key)
protected RetryContext	fromValue(SoftReference<RetryContext> value)	Get the RetryContext from the cache value.
void	setCapacity(int capacity)	Update the capacity of this cache.
protected SoftReference<RetryContext>	toValue(RetryContext context)	Compute the value to store in the cache.

Methods inherited from class org.springframework.retry.policy.AbstractMapRetryContextCache

get, getMap, put, remove

Methods inherited from class java.lang.Object

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

Constructor Details

SoftReferenceMapRetryContextCache

public SoftReferenceMapRetryContextCache()

Create an instance with the default capacity

SoftReferenceMapRetryContextCache

public SoftReferenceMapRetryContextCache(int capacity)

Create an instance with the given capacity, removing the eldest entries when the cache is full

Parameters:

capacity - the initial capacity of the cache

SoftReferenceMapRetryContextCache

public SoftReferenceMapRetryContextCache(int capacity,
 boolean removeEldestEntries)

Create an instance with the given capacity and the policy to apply when the cache is full.

Parameters:

capacity - the size of the cache

removeEldestEntries - whether to remove the eldest entries when the cache is full

Since:

1.3.5

Method Details

setCapacity

public void setCapacity(int capacity)

Update the capacity of this cache. Prevent the cache from growing unboundedly if items that fail are misidentified and two references to an identical item actually do not have the same key. This can happen when users implement equals and hashCode based on mutable fields, for instance.

Overrides:

setCapacity in class AbstractMapRetryContextCache<SoftReference<RetryContext>>

Parameters:

capacity - the capacity to set

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface RetryContextCache

Overrides:

containsKey in class AbstractMapRetryContextCache<SoftReference<RetryContext>>

toValue

protected SoftReference<RetryContext> toValue(RetryContext context)

Description copied from class: AbstractMapRetryContextCache

Compute the value to store in the cache.

Specified by:

toValue in class AbstractMapRetryContextCache<SoftReference<RetryContext>>

Parameters:

context - the RetryContext to store

Returns:

the cache value

fromValue

protected RetryContext fromValue(SoftReference<RetryContext> value)

Description copied from class: AbstractMapRetryContextCache

Get the RetryContext from the cache value.

Specified by:

fromValue in class AbstractMapRetryContextCache<SoftReference<RetryContext>>

Parameters:

value - the cache value

Returns:

the retry context