File	Doc	Category	Size	Date	Package
ConfigCacheImpl.java	API Doc	Glassfish v2 API	7314	Fri May 04 22:35:06 BST 2007	com.sun.jdo.spi.persistence.support.sqlstore.model

ConfigCacheImpl

• java.lang.Object

Fields Summary
private Map	classConfigs Map of class types to PersistenceConfig.
private Map	oidClassToClassType Map of OID classes to PersistenceCapable classes.
private com.sun.jdo.spi.persistence.support.sqlstore.VersionConsistencyCache	vcCache This cache should be notified every time a VC class is loaded or unloaded.
private Map	classLoaderToClassType Map of class loaders to a list of PersistenceCapable classes loaded by the classloader.

Constructors Summary
public ConfigCacheImpl() classConfigs = new HashMap(); classLoaderToClassType = new HashMap(); oidClassToClassType = new HashMap(); // Register for call backs on application loader events. EJBHelper.registerApplicationLifeCycleEventListener(this);

Methods Summary
private void	addToClassLoaderMap(java.lang.Class pcClass) Add pcClass to a classLoaderToClassType map. The only call to this private method is from getPersistenceConfig(). As that method is synchronized we don't need to synchronize here. param pcClass The pcClass to be added. ClassLoader classLoader = pcClass.getClassLoader(); List classes = (List) classLoaderToClassType.get(classLoader); if (classes == null) { // First entry for a given ClassLoader, initialize the ArrayList. classes = new ArrayList(); classLoaderToClassType.put(classLoader, classes); } classes.add(pcClass);
public java.lang.Class	getClassByOidClass(java.lang.Class oidType) Gets the Class instance corresponding to given oidType. param oidType The input oidType. return The Class instance corresponding to given oidType. return (Class) oidClassToClassType.get(oidType);
public synchronized com.sun.jdo.spi.persistence.support.sqlstore.PersistenceConfig	getPersistenceConfig(java.lang.Class pcClass) Get the PersistenceConfig for given pcClass. The config is looked up from a cache. If a config can not be found in cache, a new instance is created and returned. param pcClass The input pcClass. return PersistenceConfig for given pcClass. ClassDesc sqlConfig = (ClassDesc) classConfigs.get(pcClass); if (sqlConfig == null) { // The order of the below operations is important. // Initialize is called after puting sqlConfig into the // cache so that ClassDesc#fixupForeignReferences does not // cause infinite recursion. // After the initialisation, oidClassToClassType.put is // called so that sqlConfig.getOidClass() returns correct // value. sqlConfig = ClassDesc.newInstance(pcClass); classConfigs.put(pcClass, sqlConfig); sqlConfig.initialize(this); oidClassToClassType.put(sqlConfig.getOidClass(), pcClass); addToClassLoaderMap(pcClass); } return sqlConfig;
public void	notifyApplicationUnloaded(java.lang.ClassLoader classLoader) inheritDoc // Clean up classConfigs and oidClassToClassType for the given // classLoader. synchronized (this) { List pcClasses = (List) classLoaderToClassType.get(classLoader); if (pcClasses != null) { Iterator it = pcClasses.iterator(); while (it.hasNext()) { Class classType = (Class) it.next(); ClassDesc config = (ClassDesc) classConfigs.remove(classType); Class oidClass = config.getOidClass(); oidClassToClassType.remove(oidClass); if (config.hasVersionConsistency() && vcCache != null) { vcCache.removePCType(classType); } } // Data about this classLoader is no longer needed. // Remove it from cache. classLoaderToClassType.remove(classLoader); } } // Notify others to cleanup TypeTable.removeInstance(classLoader); Model model = Model.RUNTIME; model.removeResourcesFromCaches(classLoader);
public synchronized void	setVersionConsistencyCache(com.sun.jdo.spi.persistence.support.sqlstore.VersionConsistencyCache vcCache) Sets VersionConsistencyCache field. param vcCache the VersionConsistencyCache instance. this.vcCache = vcCache;