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package eu.etaxonomy.cdm.model.common.init;
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import java.util.Set;
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import java.util.UUID;
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import net.sf.ehcache.Cache;
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import net.sf.ehcache.CacheManager;
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import net.sf.ehcache.Element;
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import net.sf.ehcache.config.CacheConfiguration;
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import net.sf.ehcache.store.MemoryStoreEvictionPolicy;
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import eu.etaxonomy.cdm.model.ICdmCacher;
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import eu.etaxonomy.cdm.model.common.CdmBase;
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import eu.etaxonomy.cdm.model.common.DefinedTermBase;
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import eu.etaxonomy.cdm.model.common.Language;
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/**
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* Since cdmlib-model cannot access CdmCacher we need to create a mock class
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* for the tests.
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*
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* NOTES:
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* - All terms are put into the cache in the constructor
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* - The number of elements allowed in the cache is set to a big number - 10000
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*
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* FIXME : Once the CDMCacher is externalised this class should just subclass it.
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*
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* @author cmathew
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*
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*/
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public class MockCdmCacher implements ICdmCacher {
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private static final String DEFAULT_CACHE_NAME = "defaultCache";
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private static final String DEFAULT_CACHE_MGR_NAME = "defaultCacheManager";
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/**
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* Constructor which initialises a singleton {@link net.sf.ehcache.CacheManager}
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*
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*/
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public MockCdmCacher() {
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init();
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}
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/**
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* Initialises an empty singleton {@link net.sf.ehcache.CacheManager} and
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* sets itself as the cacher object in specific CDM Entity objects.
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*
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*/
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private void init() {
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// Remove all caches
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getDefaultCacheManager().removalAll();
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// Create default cache
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getDefaultCacheManager().addCache(new Cache(getDefaultCacheConfiguration()));
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Set<Language> langList = Language.DEFAULT().getVocabulary().getTerms();
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for (Language lang : langList){
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put(lang.getUuid(),lang);
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}
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// We start first only with DefinedTermBase
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DefinedTermBase.setCacher(this);
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}
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/**
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* Returns the singleton default cache manager.
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*
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* @return
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*/
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private static CacheManager getDefaultCacheManager() {
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// this ensures a singleton cache manager
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return CacheManager.create();
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}
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/**
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* Returns the default cache configuration.
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*
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* @return
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*/
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private CacheConfiguration getDefaultCacheConfiguration() {
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return new CacheConfiguration(DEFAULT_CACHE_NAME, 10000)
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.memoryStoreEvictionPolicy(MemoryStoreEvictionPolicy.LFU)
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.eternal(false)
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// default ttl and tti set to 2 hours
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.timeToLiveSeconds(60*60*2)
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.timeToIdleSeconds(60*60*2);
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}
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/**
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* Returns the default cache
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*
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* @return
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*/
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private static Cache getDefaultCache() {
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return getDefaultCacheManager().getCache(DEFAULT_CACHE_NAME);
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}
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/**
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* Puts the (Key,Value) pair of ({@link java.util.UUID}, {@link eu.etaxonomy.cdm.model.common.CdmBase}),
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* in the cache
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*
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* @param uuid
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* @param cdmEntity
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* @return
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*/
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@Override
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public CdmBase put(UUID uuid, CdmBase cdmEntity) {
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CdmBase cachedCdmEntity = getFromCache(uuid);
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if(getFromCache(uuid) == null) {
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getDefaultCache().put(new Element(uuid, cdmEntity));
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return cdmEntity;
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} else {
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return cachedCdmEntity;
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}
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}
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/**
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* Gets the cache element corresponding to the given {@link java.util.UUID}
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*
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* @param uuid
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* @return
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*/
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private Element getCacheElement(UUID uuid) {
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return getDefaultCache().get(uuid);
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}
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/**
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* Get CDM Entity for given {@link java.util.UUID} from the cache
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*
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* @param uuid
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* @return
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*/
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private CdmBase getCdmEntity(UUID uuid) {
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return (CdmBase)getDefaultCache().get(uuid).getObjectValue();
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}
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/* (non-Javadoc)
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* @see eu.etaxonomy.cdm.remote.cache.ICdmCacher#load(java.util.UUID)
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*/
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@Override
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public CdmBase load(UUID uuid) {
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Element e = getCacheElement(uuid);
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CdmBase cdmEntity;
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if (e == null) {
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return null;
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} else {
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return (CdmBase)e.getObjectValue();
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}
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}
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/* (non-Javadoc)
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* @see eu.etaxonomy.cdm.model.ICdmCacher#getFromCache(java.util.UUID)
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*/
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@Override
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public CdmBase getFromCache(UUID uuid) {
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Element e = getCacheElement(uuid);
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CdmBase cdmEntity;
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if (e == null) {
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return null;
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} else {
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return(CdmBase)e.getObjectValue();
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}
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}
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/* (non-Javadoc)
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* @see eu.etaxonomy.cdm.model.ICdmCacher#exists(java.util.UUID)
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*/
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@Override
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public boolean exists(UUID uuid) {
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return getCacheElement(uuid) != null;
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}
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/* (non-Javadoc)
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* @see eu.etaxonomy.cdm.model.ICdmCacher#existsAndIsNotNull(java.util.UUID)
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*/
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@Override
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public boolean existsAndIsNotNull(UUID uuid) {
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Element e = getCacheElement(uuid);
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CdmBase cdmEntity;
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if (e != null) {
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return (CdmBase)e.getObjectValue() != null;
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}
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return false;
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}
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}
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