Class ExpiryPolicyManager<K>

java.lang.Object

com.loomcache.server.jcache.ExpiryPolicyManager<K>

Type Parameters:

K - the key type

public class ExpiryPolicyManager<K>
extends Object

Manages various expiry policies for cache entries.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ExpiryPolicyManager.AccessedExpiryPolicy	Accessed policy - entries expire based on last access time.
static class	ExpiryPolicyManager.CombinedExpiryPolicy	Combined policy - entries expire at the earliest of multiple policies.
static class	ExpiryPolicyManager.CreatedExpiryPolicy	Created policy - entries expire based on creation time.
static class	ExpiryPolicyManager.EternalExpiryPolicy	Eternal policy - entries never expire.
static interface	ExpiryPolicyManager.ExpiryPolicy	Base expiry policy interface.
static class	ExpiryPolicyManager.ModifiedExpiryPolicy	Modified policy - entries expire based on last modification time.

Constructor Summary

Constructors

Constructor	Description
ExpiryPolicyManager()	Create a manager with eternal default policy.
ExpiryPolicyManager(ExpiryPolicyManager.ExpiryPolicy defaultPolicy)	Create a manager with a default expiry policy.

Method Summary

Modifier and Type	Method	Description
static ExpiryPolicyManager.ExpiryPolicy	accessedPolicy(Duration duration)	Create an accessed expiry policy.
void	clearPolicies()	Clear all policies, falling back to default.
static ExpiryPolicyManager.ExpiryPolicy	combined(ExpiryPolicyManager.ExpiryPolicy... policies)	Combine multiple expiry policies (expires at earliest).
static ExpiryPolicyManager.ExpiryPolicy	createdPolicy(Duration duration)	Create a created expiry policy.
static ExpiryPolicyManager.ExpiryPolicy	eternalPolicy()	Create an eternal expiry policy.
long	getExpiryTime(K key)	Calculate expiry time for a key.
ExpiryPolicyManager.ExpiryPolicy	getPolicy(K key)	Get expiry policy for a key.
int	getPolicyCount()	Get policy count (excluding default).
boolean	isExpired(K key, long createdTime, @Nullable Long lastAccessTime, @Nullable Long lastModifiedTime)	Check if a key has expired based on the entry's actual timestamps.
static ExpiryPolicyManager.ExpiryPolicy	modifiedPolicy(Duration duration)	Create a modified expiry policy.
void	removePolicy(K key)	Remove policy for a specific key.
void	setPolicy(K key, ExpiryPolicyManager.ExpiryPolicy policy)	Set expiry policy for a specific key.

Methods inherited from class Object

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

Constructor Details

ExpiryPolicyManager

public ExpiryPolicyManager(ExpiryPolicyManager.ExpiryPolicy defaultPolicy)

Create a manager with a default expiry policy.

ExpiryPolicyManager

public ExpiryPolicyManager()

Create a manager with eternal default policy.

Method Details

setPolicy

public void setPolicy(K key,
 ExpiryPolicyManager.ExpiryPolicy policy)

Set expiry policy for a specific key.

getPolicy

public ExpiryPolicyManager.ExpiryPolicy getPolicy(K key)

Get expiry policy for a key.

getExpiryTime

public long getExpiryTime(K key)

Calculate expiry time for a key.

isExpired

public boolean isExpired(K key,
 long createdTime,
 @Nullable Long lastAccessTime,
 @Nullable Long lastModifiedTime)

Check if a key has expired based on the entry's actual timestamps.

The reference time depends on the policy type:

• CREATED: expiry = createdTime + duration
• ACCESSED: expiry = lastAccessTime + duration (falls back to createdTime)
• MODIFIED: expiry = lastModifiedTime + duration (falls back to createdTime)

clearPolicies

public void clearPolicies()

Clear all policies, falling back to default.

removePolicy

public void removePolicy(K key)

Remove policy for a specific key.

getPolicyCount

public int getPolicyCount()

Get policy count (excluding default).

createdPolicy

public static ExpiryPolicyManager.ExpiryPolicy createdPolicy(Duration duration)

Create a created expiry policy.

accessedPolicy

public static ExpiryPolicyManager.ExpiryPolicy accessedPolicy(Duration duration)

Create an accessed expiry policy.

modifiedPolicy

public static ExpiryPolicyManager.ExpiryPolicy modifiedPolicy(Duration duration)

Create a modified expiry policy.

eternalPolicy

public static ExpiryPolicyManager.ExpiryPolicy eternalPolicy()

Create an eternal expiry policy.

combined

public static ExpiryPolicyManager.ExpiryPolicy combined(ExpiryPolicyManager.ExpiryPolicy... policies)

Combine multiple expiry policies (expires at earliest).