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.InputStream;
   4 import java.util.HashSet;
   5 import java.util.Set;
   6
   7 import net.sf.ehcache.Cache;
   8 import net.sf.ehcache.CacheException;
   9 import net.sf.ehcache.CacheManager;
  10 import net.sf.ehcache.config.CacheConfiguration;
  11 import net.sf.ehcache.config.SizeOfPolicyConfiguration;
  12
  13 import org.springframework.core.io.ClassPathResource;
  14 import org.springframework.core.io.Resource;
  15
  16
  17 public class CdmRemoteCacheManager {
  18
  19         private CacheManager cdmlibModelCacheManager;
  20
  21         private static CdmRemoteCacheManager cdmRemoteCacheManager = null;
  22
  23         private final Set<CdmTransientEntityCacher> transientEntityCachers = new HashSet<CdmTransientEntityCacher>();
  24
  25     public static final Resource CDMLIB_CACHE_MANAGER_CONFIG_RESOURCE =
  26             new ClassPathResource("cdmlib-ehcache.xml");
  27
  28     public static final String CDM_MODEL_CACHE_MGR_NAME = "cdmlibModelCacheManager";
  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
  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
  53             SizeOfPolicyConfiguration sizeOfConfig = new SizeOfPolicyConfiguration();
  54             sizeOfConfig.setMaxDepth(1000);
  55             sizeOfConfig.setMaxDepthExceededBehavior("abort");
  56
  57                 CacheConfiguration modelcc = new CacheConfiguration(CDM_MODEL_CACHE_NAME, 0)
  58             .eternal(true)
  59             .statistics(true)
  60             .sizeOfPolicy(sizeOfConfig)
  61             .overflowToOffHeap(false);
  62
  63                 Cache modelCache = new Cache(modelcc);
  64
  65                         cdmlibModelCacheManager = CacheManager.create(CDM_MODEL_CACHE_MGR_NAME);
  66                         cdmlibModelCacheManager.addCache(modelCache);
  67
  68                 } catch (CacheException e) {
  69                         throw new CdmClientCacheException(e);
  70                 }
  71
  72     }
  73
  74         public Cache getCdmModelGetMethodsCache(){
  75                 return cdmlibModelCacheManager.getCache(CDM_MODEL_CACHE_NAME);
  76         }
  77
  78         public CacheManager getCdmModelGetMethodsCacheManager() {
  79             return cdmlibModelCacheManager;
  80         }
  81
  82         public CacheManager getDefaultCacheManager() {
  83             return CacheManager.create();
  84         }
  85
  86         public void shutdown(CdmCacheManagerType ccmt) {
  87                 CacheManager cm;
  88                 switch(ccmt) {
  89                 case CDMLIB_MODEL:
  90                         cdmlibModelCacheManager.shutdown();
  91                         break;
  92                 case DEFAULT:
  93                         cm = CacheManager.create();
  94                         cm.shutdown();
  95                         break;
  96                 default:
  97                         //do nothing
  98                 }
  99         }
 100
 101
 102
 103 }