wt.project
Class ProjectCache

java.lang.Object
  java.rmi.server.RemoteObject
      java.rmi.server.RemoteServer
          wt.util.RMIServer
              wt.cache.CacheManager
                  wt.project.ProjectCache

All Implemented Interfaces:

CacheServer, Remote, Serializable, Unreferenced

public class ProjectCache

extends CacheManager

This class implements a Project cache service. It follows the 2-level cache paradigm. Creation and updates to Projects must be communicated to the cache by the Services manager.

See Also:

Serialized Form

Nested Class Summary

static class

ProjectCache.ProjectCacheReporter

Field Summary

private static int	CACHESIZE
private static ProjectCache	projectCache
private static Vector	rNames
private static boolean	VERBOSE
private static String	versionID

Fields inherited from class wt.cache.CacheManager

MASTER

Fields inherited from class wt.util.RMIServer

csf, ssf

Fields inherited from class java.rmi.server.RemoteServer

Fields inherited from class java.rmi.server.RemoteObject

ref

Constructor Summary

ProjectCache()
Do not directly invoke this constructor! Use getProjectCache instead.

Method Summary

protected void	clear()
int	getDefaultSize() Get desired size of this cache.
Enumeration	getEntries() Return a sorted enumeration of all ProjectReferences
static ProjectCache	getProjectCache() Contruct a new Project cache.
static void	main(String[] args)
protected void	populateCache()
void	Print()
void	putEntry(Object key, Object value) Overrides CacheManager.putEntry to do nothing so that no entries are added to the wt.util.Cache object contained in CacheManager.
protected void	removeEntry(Object target) Simply clear local cache when signalled.
void	reset() Method called when connection to master cache is broken and recovered indicating that a notification from another project cache might have been missed.

Methods inherited from class wt.cache.CacheManager

checkAccess, get, getDefaultName, getEntry, isCacheHost, overflow, ping, put, putEntry, reference, registerSlave, remove, remove, removeEntry, unreferenced, update, updateEntry, updateEntry

Methods inherited from class wt.util.RMIServer

clone, exportObject, exportObject, exportObject, getClientSocketFactory, getPort, getServerSocketFactory, getStub, isHostInList, isLocalHost, setPort, writeReplace

Methods inherited from class java.rmi.server.RemoteServer

getClientHost, getLog, setLog

Methods inherited from class java.rmi.server.RemoteObject

equals, getRef, hashCode, toString, toStub

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

versionID

private static final String versionID

See Also:

Constant Field Values

rNames

private static Vector rNames

projectCache

private static ProjectCache projectCache

VERBOSE

private static final boolean VERBOSE

CACHESIZE

private static int CACHESIZE

Constructor Detail

ProjectCache

public ProjectCache()
             throws RemoteException

Do not directly invoke this constructor! Use getProjectCache instead. The constructor is public so that the ServerManager can create an instance of this class for use as the master cache.

However, since the master cache is only being used to signal slave caches, we don't want to construct any of the internal cache objects.

Method Detail

getProjectCache

public static ProjectCache getProjectCache()

Contruct a new Project cache.

removeEntry

protected void removeEntry(Object target)

Simply clear local cache when signalled. Will be repopulated on subsequent requests

Overrides:

removeEntry in class CacheManager

Parameters:

target - the key object (null = clear entire cache)

getEntries

public Enumeration getEntries()
                       throws WTException

Return a sorted enumeration of all ProjectReferences

Throws:

WTException

putEntry

public void putEntry(Object key,
                     Object value)

Overrides CacheManager.putEntry to do nothing so that no entries are added to the wt.util.Cache object contained in CacheManager.

Overrides:

putEntry in class CacheManager

Parameters:

key - the key object

value - the value object

getDefaultSize

public int getDefaultSize()

Description copied from class: CacheManager

Get desired size of this cache. This method attemps to find a size property called wt.cache.size.CacheName where cacheName is the name of this cache. Subclasses can override this method to control cache size in some other way. If no property is found, the default size is 100.

Supported API: true

Overrides:

getDefaultSize in class CacheManager

populateCache

protected void populateCache()
                      throws WTException

Throws:

WTException

clear

protected void clear()

reset

public void reset()

Method called when connection to master cache is broken and recovered indicating that a notification from another project cache might have been missed. The current cache is cleared and reinitialized later.

Overrides:

reset in class CacheManager

Print

public void Print()

main

public static void main(String[] args)