org.camunda.bpm.engine.rest.hal.cache

Class HalCachingLinkResolver

java.lang.Object

org.camunda.bpm.engine.rest.hal.cache.HalCachingLinkResolver

All Implemented Interfaces:

HalLinkResolver

Direct Known Subclasses:

HalIdentityLinkResolver, HalIdResourceCacheLinkResolver

public abstract class HalCachingLinkResolver
extends Object
implements HalLinkResolver

Constructor Summary

Constructors

Constructor and Description
HalCachingLinkResolver()

Method Summary

Modifier and Type	Method and Description
protected Cache	getCache()
protected abstract Class<?>	getHalResourceClass()
protected Comparator<HalResource<?>>	getResourceComparator()
protected abstract String	getResourceId(HalResource<?> resource)
protected void	putIntoCache(List<HalResource<?>> notCachedResources) Put a resource into the cache.
protected List<HalResource<?>>	resolveCachedLinks(String[] linkedIds, Cache cache, List<String> notCachedLinkedIds) Returns a list with all resources which are cached.
List<HalResource<?>>	resolveLinks(String[] linkedIds, ProcessEngine processEngine) Resolve resources for linked ids, if configured uses a cache.
protected abstract List<HalResource<?>>	resolveNotCachedLinks(String[] linkedIds, ProcessEngine processEngine)
protected void	sortResolvedResources(List<HalResource<?>> resolvedResources) Sort the resolved resources to ensure consistent order of resolved resources.

Methods inherited from class java.lang.Object

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

Constructor Detail

HalCachingLinkResolver

public HalCachingLinkResolver()

Method Detail

resolveLinks

public List<HalResource<?>> resolveLinks(String[] linkedIds,
                                         ProcessEngine processEngine)

Resolve resources for linked ids, if configured uses a cache.

Specified by:

resolveLinks in interface HalLinkResolver

sortResolvedResources

protected void sortResolvedResources(List<HalResource<?>> resolvedResources)

Sort the resolved resources to ensure consistent order of resolved resources.

getCache

protected Cache getCache()

Returns:

the cache for this resolver

resolveCachedLinks

protected List<HalResource<?>> resolveCachedLinks(String[] linkedIds,
                                                  Cache cache,
                                                  List<String> notCachedLinkedIds)

Returns a list with all resources which are cached.

Parameters:

linkedIds - the ids to resolve

cache - the cache to use

notCachedLinkedIds - a list with ids which are not found in the cache

Returns:

the cached resources

putIntoCache

protected void putIntoCache(List<HalResource<?>> notCachedResources)

Put a resource into the cache.

getHalResourceClass

protected abstract Class<?> getHalResourceClass()

Returns:

the class of the entity which is resolved

getResourceComparator

protected Comparator<HalResource<?>> getResourceComparator()

Returns:

a comparator for this HAL resource if not overridden sorting is skipped

resolveNotCachedLinks

protected abstract List<HalResource<?>> resolveNotCachedLinks(String[] linkedIds,
                                                              ProcessEngine processEngine)

Returns:

the resolved resources which are currently not cached

getResourceId

protected abstract String getResourceId(HalResource<?> resource)

Returns:

the id which identifies a resource in the cache