kontent.ai.delivery

Class SimpleInMemoryCacheManager

java.lang.Object

kontent.ai.delivery.SimpleInMemoryCacheManager

All Implemented Interfaces:

CacheManager

public class SimpleInMemoryCacheManager
extends java.lang.Object
implements CacheManager

Uses the JVM memory to cache results. It also allows cache to be invalidated based on both the codename and language of content items. This makes it easy to invalidate the cache for incoming webhooks.

This implementation mainly serves as an example. Do not use this cache manager when your application is deployed as multiple replicas! In that case a centralized cache (e.g. Redis) is advisable.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SimpleInMemoryCacheManager.CacheTag

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Map<java.lang.String,com.fasterxml.jackson.databind.JsonNode>	cache
protected java.util.concurrent.atomic.AtomicInteger	hits
protected java.util.concurrent.atomic.AtomicInteger	puts
protected java.util.concurrent.atomic.AtomicInteger	queries
protected java.util.Map<java.lang.String,java.util.Set<java.lang.String>>	tagsForUrls

Constructor Summary

Constructors

Constructor and Description
SimpleInMemoryCacheManager()

Method Summary

Modifier and Type	Method and Description
com.fasterxml.jackson.databind.JsonNode	get(java.lang.String url) Retrieve an earlier cached response from the Kontent.ai Delivery API.
void	invalidate(SimpleInMemoryCacheManager.CacheTag cacheTag)
void	invalidate(java.lang.String url)
void	put(java.lang.String url, com.fasterxml.jackson.databind.JsonNode jsonNode, java.util.List<ContentItem> containedContentItems) Cache a response from the Kontent.ai Delivery API.

Methods inherited from class java.lang.Object

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

Field Detail

cache

protected final java.util.Map<java.lang.String,com.fasterxml.jackson.databind.JsonNode> cache

tagsForUrls

protected final java.util.Map<java.lang.String,java.util.Set<java.lang.String>> tagsForUrls

queries

protected final java.util.concurrent.atomic.AtomicInteger queries

hits

protected final java.util.concurrent.atomic.AtomicInteger hits

puts

protected final java.util.concurrent.atomic.AtomicInteger puts

Constructor Detail

SimpleInMemoryCacheManager

public SimpleInMemoryCacheManager()

Method Detail

get

public com.fasterxml.jackson.databind.JsonNode get(java.lang.String url)

Description copied from interface: CacheManager

Retrieve an earlier cached response from the Kontent.ai Delivery API.

Specified by:

get in interface CacheManager

Parameters:

url - The url that would be used to retrieve the response from Kontent.ai Delivery API.

Returns:

JsonNode response or null if no value is available in the cache for the given url.

put

public void put(java.lang.String url,
                com.fasterxml.jackson.databind.JsonNode jsonNode,
                java.util.List<ContentItem> containedContentItems)

Description copied from interface: CacheManager

Cache a response from the Kontent.ai Delivery API.

Specified by:

put in interface CacheManager

Parameters:

url - the URL that was used to retrieve the response from the Kontent.ai Delivery API.

jsonNode - the JsonNode created from the response from the Kontent.ai Delivery API.

containedContentItems - (null allowed) can be used to inspect the original contents of the JsonNode and allow for precise cache invalidation (if implemented).

invalidate

public void invalidate(java.lang.String url)

invalidate

public void invalidate(SimpleInMemoryCacheManager.CacheTag cacheTag)