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