eu.etaxonomy.taxeditor.cdmlib/src/main/java/eu/etaxonomy/taxeditor/remoting/cache/CdmRemoteCacheManager.java

   1 package eu.etaxonomy.taxeditor.remoting.cache;
   2
   3 import java.io.File;
   4 import java.io.InputStream;
   5 import java.util.HashSet;
   6 import java.util.Set;
   7
   8 import net.sf.ehcache.Cache;
   9 import net.sf.ehcache.CacheException;
  10 import net.sf.ehcache.CacheManager;
  11
  12 import org.springframework.core.io.ClassPathResource;
  13 import org.springframework.core.io.Resource;
  14
  15 import eu.etaxonomy.cdm.common.CdmUtils;
  16
  17
  18 public class CdmRemoteCacheManager {
  19
  20         private CacheManager cdmlibModelCacheManager;
  21
  22         private static CdmRemoteCacheManager cdmRemoteCacheManager = null;
  23
  24         private final Set<CdmTransientEntityCacher> transientEntityCachers = new HashSet<CdmTransientEntityCacher>();
  25
  26     public static final Resource CDMLIB_CACHE_MANAGER_CONFIG_RESOURCE =
  27             new ClassPathResource("cdmlib-ehcache.xml");
  28
  29     public static final String CDM_MODEL_CACHE_NAME = "cdmModelGetMethodsCache";
  30
  31
  32     public enum CdmCacheManagerType {
  33         CDMLIB_MODEL,
  34         DEFAULT
  35     }
  36
  37     public static CdmRemoteCacheManager getInstance(){
  38         if(cdmRemoteCacheManager == null) {
  39                 cdmRemoteCacheManager = new CdmRemoteCacheManager();
  40         }
  41         return cdmRemoteCacheManager;
  42     }
  43     private CdmRemoteCacheManager() {
  44
  45         System.setProperty("ehcache.disk.store.dir", CdmUtils.getCdmHomeDir().getAbsolutePath() + File.separator + "cdmlib-model");
  46         try {
  47                 // NOTE:Programmatically creating the cache manager may solve the problem of
  48                 //      recreating data written to disk on startup
  49                 //      see https://stackoverflow.com/questions/1729605/ehcache-persist-to-disk-issues
  50                 //String cacheFilePath = CDMLIB_CACHE_MANAGER_CONFIG_RESOURCE.getFile().getAbsolutePath();
  51                 InputStream in = this.getClass().getClassLoader().getResourceAsStream("cdmlib-ehcache.xml");
  52                         cdmlibModelCacheManager = new CacheManager(in);
  53
  54                 } catch (CacheException e) {
  55                         throw new CdmClientCacheException(e);
  56                 }
  57 //              } catch (IOException e) {
  58 //                      throw new CdmClientCacheException(e);
  59 //              }
  60     }
  61
  62         public Cache getCdmModelGetMethodsCache(){
  63                 return cdmlibModelCacheManager.getCache(CDM_MODEL_CACHE_NAME);
  64         }
  65
  66         public CacheManager getCdmModelGetMethodsCacheManager() {
  67             return cdmlibModelCacheManager;
  68         }
  69
  70         public CacheManager getDefaultCacheManager() {
  71             return CacheManager.create();
  72         }
  73
  74         public void shutdown(CdmCacheManagerType ccmt) {
  75                 CacheManager cm;
  76                 switch(ccmt) {
  77                 case CDMLIB_MODEL:
  78                         cdmlibModelCacheManager.shutdown();
  79                         break;
  80                 case DEFAULT:
  81                         cm = CacheManager.create();
  82                         cm.shutdown();
  83                         break;
  84                 default:
  85                         //do nothing
  86                 }
  87         }
  88
  89         public static void checkCacheProperties() {
  90                 String pathToCache = System.getProperty("ehcache.disk.store.dir");
  91                 if(pathToCache == null || pathToCache.isEmpty()) {
  92                         throw new CdmClientCacheException("'ehcache.disk.store.dir' property is not set");
  93                 }
  94         }
  95
  96
  97 }