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Glassfish example source code file (LruSessionCache.java)

This example Glassfish source code file (LruSessionCache.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Glassfish tags/keywords

arraylist, cacheitem, cacheitem, exception, io, log, logging, lrucacheitem, lrucacheitem, lrusessioncacheitem, object, object, simplemetadata, state_running, statefulejbcontext, statefulejbcontext, trimtimedoutbeans, util

The Glassfish LruSessionCache.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * and therefore, elected the GPL Version 2 license, then the option applies
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 */

package com.sun.ejb.containers.util.cache;

import com.sun.appserv.util.cache.CacheListener;

import com.sun.ejb.base.io.IOUtils;

import com.sun.ejb.spi.container.SFSBContainerCallback;
import com.sun.ejb.spi.container.StatefulEJBContext;

import com.sun.ejb.base.stats.StatefulSessionStoreMonitor;

import org.glassfish.ha.store.api.BackingStore;
import org.glassfish.ha.store.util.SimpleMetadata;
import org.glassfish.ha.store.api.BackingStoreException;

import java.io.Serializable;
import java.util.*;
import java.util.logging.*;


public class LruSessionCache
    extends LruCache
    implements com.sun.ejb.spi.stats.EJBCacheStatsProvider
{

    protected int           numActivated;
    
    protected int		    cacheIdleTimeoutInSeconds;
    protected int		    removalTimeoutInSeconds;
    
    protected Object loadCountLock = new Object();
    protected int loadFromBackupCount;
    
    protected boolean removeIfIdle = false;
    
    public int passivationCount = 0;
    protected Object passivationCountLock = new Object();
    
    private Object numPassLock = new Object();
    private int numVictimsAccessed = 0;
    
    protected SFSBContainerCallback     container;
    protected BackingStore<Serializable, SimpleMetadata> backingStore;

    private static final byte CACHE_ITEM_VALID = 0;
    private static final byte CACHE_ITEM_LOADING = 1;
    private static final byte CACHE_ITEM_REMOVED = 2;

    protected String configData;

    private static final int	    STATE_RUNNING = 0;
    private static final int	    STATE_SHUTTING_DOWN = 1;
    private static final int	    STATE_UNDEPLOYING = 2;
    private static final int	    STATE_DESTROYED = 3;

    private int			    currentCacheState = STATE_RUNNING;

    protected int	confMaxCacheSize = Integer.MAX_VALUE;

    // TODO enable when enabling monitoring in SFSB container
    // private StatefulSessionStoreMonitor	    sfsbStoreMonitor;

    /**
     * Destroys all references. This is the last method call of this object's 
     * life cycle. 
     *
     * This method is called during undeploy of ejb container.
     */
    public void destroy() {
        this.currentCacheState = STATE_DESTROYED;
        this.container = null;

        super.destroy();
    }
    
    
    public LruSessionCache(String cacheName, 
                           SFSBContainerCallback container, 
                           int cacheIdleTime, int removalTime) {
        super();
        super.setCacheName(cacheName);

        this.container = container;
        
        this.cacheIdleTimeoutInSeconds = 
            (cacheIdleTime <= 0) ? 0 : cacheIdleTime;
        this.removalTimeoutInSeconds = 
            (removalTime <= 0) ? 0 : removalTime;
        
        if (cacheIdleTimeoutInSeconds > 0) {
            super.timeout = cacheIdleTimeoutInSeconds*1000L;
        }

        removeIfIdle = (removalTimeoutInSeconds > 0)
	    && (removalTimeoutInSeconds <= cacheIdleTimeoutInSeconds);
    }

    public void setBackingStore(BackingStore<Serializable, SimpleMetadata> store) {
        this.backingStore = store;
    }

    public void setStatefulSessionStoreMonitor(
	StatefulSessionStoreMonitor storeMonitor)
    {
	// this.sfsbStoreMonitor = storeMonitor;
    }
    
    /**
     * trim the item from the cache and notify listeners
     * @param item to be trimmed
     */
    protected void trimItem(CacheItem item) {
        LruCacheItem removed = (LruCacheItem) item;

        if (removeIfIdle) {
            StatefulEJBContext ctx = (StatefulEJBContext) item.value;
            
            long idleThreshold = 
                System.currentTimeMillis() - removalTimeoutInSeconds*1000L;
            if (ctx.getLastAccessTime() <= idleThreshold) {
                container.passivateEJB(ctx);
                return;
            }
        }

        for (int i = 0; i < listeners.size(); i++) {
            CacheListener listener = (CacheListener) listeners.get(i);
            listener.trimEvent(removed.key, removed.value);
        }
    }

    protected void itemAccessed(CacheItem item) {
        LruCacheItem lc = (LruCacheItem) item;
        synchronized (this) {
	    if (lc.isTrimmed) {
		lc.isTrimmed = false;
		numVictimsAccessed += 1;
		CacheItem overflow = super.itemAdded(item);
		if (overflow != null) {
		    trimItem(overflow);
		}
	    } else {
		super.itemAccessed(item);
	    }
	}
    }

    public int getLoadFromBackupCount() {
        return loadFromBackupCount;
    }

    protected void incrementLoadFromBackupCount() {
        synchronized (loadCountLock) {
            loadFromBackupCount++;
        }
    }

    // return the EJB for the given instance key
    //Called from StatefulSessionContainer
    public StatefulEJBContext lookupEJB(Serializable sessionKey,
        SFSBContainerCallback container, Object cookie)
    {
        int hashCode = hash(sessionKey);
        int index = getIndex(hashCode);
        CacheItem item = null;
        LruSessionCacheItem newItem = null;
        Object value = null;

        synchronized (bucketLocks[index]) {
            item = buckets[index];
            for (; item != null; item = item.next) {
                if ( (hashCode == item.hashCode) && 
                     (item.key.equals(sessionKey)) )
                {
                    value = item.value;
                    break;
                }
            }
            
            // update the stats in line
            if (value != null) {
                itemAccessed(item);
            } else if (item == null) {
                newItem = new LruSessionCacheItem(hashCode, sessionKey,
                        null, -1, CACHE_ITEM_LOADING); 
                newItem.next = buckets[index];
                buckets[index] = newItem;
            }
        }

        
        if (value != null) {
            incrementHitCount();
            return (StatefulEJBContext) value;
        } 
        
        incrementMissCount();
        if (item != null) {
            synchronized (item) {
                LruSessionCacheItem lruItem = (LruSessionCacheItem) item;
                if ((lruItem.value == null) && (lruItem.cacheItemState == CACHE_ITEM_LOADING)) {
                    lruItem.waitCount++;
                    try { item.wait(); } catch (InterruptedException inEx) {}
                }
                return (StatefulEJBContext) item.value;
            }
        }

        //This is the thread that actually does the I/O
	long activationStartTime = -1;
	/*if (sfsbStoreMonitor.isMonitoringOn()) {
	    activationStartTime = System.currentTimeMillis();
	}*/
        try {
            newItem.value = value = getStateFromStore(sessionKey, container);
            synchronized (buckets[index]) {
                if (value == null) {
                    //Remove the temp cacheItem that we created.
                    CacheItem prev = null;
                    for (CacheItem current = buckets[index]; current != null;
                            current = current.next)
                    {
                        if (current == newItem) {
                            if (prev == null) {
                                buckets[index] = current.next;
                            } else {
                                prev.next = current.next;
                            }
                            current.next = null;
                            break;
                        }
                        prev = current;
                    }
                } else {
                    container.activateEJB(sessionKey,
                        (StatefulEJBContext) value, cookie);
		    // sfsbStoreMonitor.incrementActivationCount(true);

                    CacheItem overflow = itemAdded(newItem);
                    incrementEntryCount();
                    // make sure we are are not crossing the threshold
                    if (overflow != null) {
                        trimItem(overflow);
                    }
                }
            } //end of sync
        } catch (javax.ejb.EJBException ejbEx) {
	    //sfsbStoreMonitor.incrementActivationCount(false);
            remove(sessionKey);
            value = null;
        } finally {
            synchronized (newItem) {
                newItem.cacheItemState = CACHE_ITEM_VALID;
                if (newItem.waitCount > 0) {
                    newItem.notifyAll();
                }
            }
	    if (activationStartTime != -1) {
		long timeSpent = System.currentTimeMillis()
		    - activationStartTime;
		//sfsbStoreMonitor.setActivationTime(timeSpent);
	    }
        }

        return (StatefulEJBContext) value;
    }

    //Called from StatefulSessionContainer
    //public void deleteEJB(Object sessionKey) 
    public Object remove(Object sessionKey) {
	return remove(sessionKey, true);
    }

    public Object remove(Object sessionKey, boolean removeFromStore) {
        int hashCode = hash(sessionKey);
        int index = getIndex(hashCode);

        CacheItem prev = null, item = null;

        synchronized (bucketLocks[index]) {
            for (item = buckets[index]; item != null; item = item.next) {
                if ((hashCode == item.hashCode) && sessionKey.equals(item.key)) {
                    if (prev == null) {
                        buckets[index] = item.next;
                    } else  {
                        prev.next = item.next;
                    }
                    item.next = null;
                    
                    itemRemoved(item);
                    ((LruSessionCacheItem) item).cacheItemState = CACHE_ITEM_REMOVED;
                    break;
                }
                prev = item;
            }

            //remove it from the BackingStore also
            //In case it had been checkpointed

            //  remove it from BackingStore outside sync block
	    if (removeFromStore) {
		try {
		    backingStore.remove((Serializable) sessionKey);
		} catch (BackingStoreException sfsbEx) {
		    _logger.log(Level.WARNING, "[" + cacheName + "]: Exception in "
			+ "backingStore.remove(" + sessionKey + ")", sfsbEx);
		}
	    }
	}
        
        if (item != null) {
            decrementEntryCount();
            incrementRemovalCount();
            
            incrementHitCount();
        } else {
            incrementMissCount();
        }
        
        return null;
    }

    // Called by Cache implementation thru container, on Recycler's thread
    // The container has already acquired the lock on the StatefulEJBContext
    public boolean passivateEJB(StatefulEJBContext ctx, Serializable sessionKey)
	throws java.io.NotSerializableException
    {

        try {
            int hashCode = hash(sessionKey);
            int index = getIndex(hashCode);
            
            boolean itemRemoved = false;
            CacheItem prev = null, item = null;
            synchronized (bucketLocks[index]) {
                for (item = buckets[index]; item != null; item = item.next) {
                    if (item.value == ctx) {
                        LruCacheItem lruSCItem = (LruCacheItem) item;
                        if (lruSCItem.isTrimmed == false) {
                            //Was accessed just after marked for passivation
                            if(_logger.isLoggable(Level.FINE)) {
                                _logger.log(Level.FINE, cacheName +  ": session accessed after marked for passivation: " + sessionKey);
                            }
                            return false;
                        }
                        break;
                    }
                    prev = item;
                }

                if (item == null) {
                    //Could have been removed
                    return true; //???????
                }

                if (removeIfIdle) {
                    long idleThreshold = System.currentTimeMillis() - 
                        removalTimeoutInSeconds*1000L;
                    //XXX: Avoid currentTimeMillis
                    if (ctx.getLastAccessTime() <= idleThreshold) {
                        if(_logger.isLoggable(Level.FINE)) {
                            _logger.log(Level.FINE, cacheName + 
                                ": Removing session "
                                + " instead of passivating for key: " + sessionKey);
                        }

                    	if (prev == null) {
                            buckets[index] = item.next;
                    	} else {
                            prev.next = item.next;
                    	}
                    	item.next = null;
                        itemRemoved = true;
                        //TODO::store.incrementExpiredSessionsRemoved();
                    }
                }

            }

            if (itemRemoved) {
                decrementEntryCount();
                incrementRemovalCount();
                return true;
            }

            if (saveStateToStore(sessionKey, ctx) == false) {
                return false;
            }

            synchronized (bucketLocks[index]) {
                prev = null;
                for (item = buckets[index]; item != null; item = item.next) {
                    if (item.value == ctx) {
                        LruCacheItem lruSCItem = (LruCacheItem) item;
                        if (lruSCItem.isTrimmed == false) {
                            //Was accessed just after marked for passivation
                            return false;
                        }
                        
                    	if (prev == null) {
                            buckets[index] = item.next;
                    	} else  {
                            prev.next = item.next;
                    	}
                    	item.next = null;
                        break;
                    }
                    prev = item;
                }
            }
            
            if (item != null) {
            	decrementEntryCount();
                incrementRemovalCount();
            }
            
            return true;
        } catch (java.io.NotSerializableException notSerEx) {
	    throw notSerEx;
        } catch (Exception ex) {
            _logger.log(Level.WARNING, 
               "[" + cacheName + "]: passivateEJB(), Exception caught -> ",ex);
        }
        return false;
    } //passivateEJB

    private Object getStateFromStore(Serializable sessionKey, SFSBContainerCallback container) {

        Object object = null;

        try {
            SimpleMetadata beanState = backingStore.load(sessionKey, null);
            byte[] data = (beanState != null)
                ? beanState.getState()
                : null;
            if ( data == null ) {
                if(_logger.isLoggable(Level.SEVERE)) {
                    _logger.log(Level.SEVERE, cacheName + ": Cannot load from "
                                + " BACKUPSTORE FOR Key: <" + sessionKey + ">");
                }
            }  else {
		//sfsbStoreMonitor.setActivationSize(data.length);
                incrementLoadFromBackupCount();
                object = IOUtils.deserializeObject(data, true,
                        container.getClassLoader());
            }
        } catch ( Exception ex ) {
            _logger.log(Level.SEVERE, cacheName + ": Exception while "
                        + " loading from backup session: <" + sessionKey + ">", ex);
        } catch ( Error ex ) {
            _logger.log(Level.SEVERE, cacheName + ": Error while "
                        + " loading from backup session: <" + sessionKey + ">", ex);
        }

        return object;
    }

    private boolean saveStateToStore(Serializable sessionKey, StatefulEJBContext ctx)
	throws java.io.NotSerializableException, java.io.IOException
    {
        byte[] data = IOUtils.serializeObject(ctx.getSessionContext(), true);

	//If we are here then we were able to serialize the object successfully
        boolean status = false;
	
	if (data != null) {
	    SimpleMetadata beanState = new SimpleMetadata(
		ctx.getVersion(), ctx.getLastAccessTime(), removalTimeoutInSeconds*1000, data);
        
        //Note: Don't increment the version here because
        //  this is called on an async thread and the client
        //  already has the correct version
        beanState.setVersion(ctx.getVersion());
	    try {
		backingStore.save(sessionKey, beanState, !ctx.existsInStore());
		// sfsbStoreMonitor.setPassivationSize(data.length);
		status = true;
	    } catch (BackingStoreException sfsbEx) {
		_logger.log(Level.WARNING, "[" + cacheName + "]: Exception during "
		    + "backingStore.passivateSave(" + sessionKey + ")", sfsbEx);
	    }
	}

	return status;
    }
    
    private void trimSelectedVictims(ArrayList victims) {
        int sz = victims.size();
        
        synchronized (this) {
            trimCount += sz;
        }
        CacheItem item = null;
        for (int i=0; i<sz; i++) {
            item = (CacheItem) victims.get(i);
            trimItem(item);
    	}
    }

    public void setShutdownState() {
	currentCacheState = STATE_SHUTTING_DOWN;
    }

    public void setUndeployedState() {
	currentCacheState = STATE_UNDEPLOYING;
    }

    /**
     * get an Iterator for the values stored in the cache
     * @returns an Iterator
     */
    public Iterator values() {
        ArrayList valueList = new ArrayList();

	synchronized (this) {
            LruCacheItem item = tail;
            while (item != null) {
                StatefulEJBContext ctx = (StatefulEJBContext) item.value;
                if (ctx != null) {
		    valueList.add(ctx);
		}

                //Ensure that for head the lPrev is null
                if( (item == head) && (item.lPrev != null) ) {
                    _logger.log(Level.WARNING, 
                        "[" + cacheName + "]: Iterator(), resetting head.lPrev");
                    item.lPrev = null;
                }
                // traverse to the previous one
                item = item.lPrev;
	    }
	}

        return valueList.iterator();
    }
    
    public void shutdown() {
        ArrayList<StatefulEJBContext> valueList = new ArrayList();

        synchronized (this) {
            LruCacheItem item = tail;
            while (item != null) {
                StatefulEJBContext ctx = (StatefulEJBContext) item.value;
                if (ctx != null) {
                    item.isTrimmed = true;
                    valueList.add(ctx);
                }

                // Ensure that for head the lPrev is null
                if ((item == head) && (item.lPrev != null)) {
                    _logger.log(Level.WARNING, "[" + cacheName
                            + "]: Iterator(), resetting head.lPrev");
                    item.lPrev = null;
                }
                // traverse to the previous one
                item = item.lPrev;
            }
        }

        for (StatefulEJBContext ctx : valueList) {
            container.passivateEJB(ctx);
        }
    }
    

    /**
     * trim the timedOut entries from the cache.
     * This call is to be scheduled by a thread managed by the container.
     * In this case a sorted LRU list exists based on access time and this
     * list is scanned
     */
    public void trimTimedoutItems(int  maxTrimCount) {
        
        int count = 0;
        LruCacheItem item;
        long currentTime = System.currentTimeMillis();
        long idleThresholdTime = currentTime - cacheIdleTimeoutInSeconds*1000L;
        ArrayList victimList = new ArrayList();

        synchronized (this) {
            if(_logger.isLoggable(Level.FINE)) {
            	_logger.log(Level.FINE, 
                    "[" + cacheName + "]: TrimTimedoutBeans started...");
            }
           
            if (tail == null) {	// No LRU list exists
                if(_logger.isLoggable(Level.FINE)) {
                    _logger.log(Level.FINE, 
                                "[" + cacheName + "]: TrimTimedoutBeans "
                                + " finished after removing 0 idle beans");
                }
                head = null;
                return;
            }
            // traverse LRU list and collect victims into the victimList
            item = tail;
            while (true) {
		if (currentCacheState != STATE_RUNNING) {
                    _logger.log(Level.WARNING, 
                        "[" + cacheName + "]: Exiting TrimTimedoutBeans() because "
			+ "current cache state: " + currentCacheState);
		    break;
		}

                StatefulEJBContext ctx = (StatefulEJBContext) item.value;
                if (ctx != null) {
                    // if we found a valid item, add it to the list
                    if ((ctx.getLastAccessTime() <= idleThresholdTime) &&
                        ctx.canBePassivated()) {
                        item.isTrimmed = true;
                        victimList.add(item);
                    } else {
                        break;
                    }
                }
                //Ensure that for head the lPrev is null
                if( (item == head) && (item.lPrev != null) ) {
                    _logger.log(Level.WARNING, 
                        "[" + cacheName + "]: TrimTimedoutBeans(), resetting head.lPrev");
                    item.lPrev = null;
                }
                // traverse to the previous one
                item = item.lPrev;
                if (item == null) {
                    break;
                }
                //for the last item that was picked up as a victim disconnect
                //it from the list
                item.lNext.lPrev = null;
                item.lNext.lNext = null;

                item.lNext = null;
            }
            if (item == tail) {			
                // no items were selected for trimming
                if(_logger.isLoggable(Level.FINE)) {
                    _logger.log(Level.FINE, 
                                "[" + cacheName + "]: TrimTimedoutBeans "
                                + " finished after removing 0 idle beans");
                }
                return;
            }

            // there is at least one item selected for trimming
            if (item == null)
                head = null;

            tail = item;
            count = victimList.size();
            listSize -= count;
            trimCount += count;
        }
        
        // trim the items from the BaseCache
        for (int idx = 0;idx < count; idx++) {
            trimItem((LruCacheItem) victimList.get(idx));
        }

        if(_logger.isLoggable(Level.FINE)) {
            _logger.log(Level.FINE, 
                        "[" + cacheName + "]: TrimTimedoutBeans "
                        + " finished after removing " + count + " idle beans");
        }
    }

    /**
     * This method picks idle items from a cache which does not have a sorted
     * LRU list
     * NRU cache at light loads and FIFO caches do not maintain a LRU list and
     * hence they have to scan the entire cache and select victims
     **/
    public void trimUnSortedTimedoutItems(int  maxCount) {
        int maxIndex = buckets.length;
        long idleThreshold = System.currentTimeMillis() - timeout;
        ArrayList victims = new ArrayList();
        int sz = 0;
        int totalSize = 0;
        
        if(_logger.isLoggable(Level.FINE)) {
            _logger.log(Level.FINE, 
                        "[" + cacheName + "]: TrimUnsortedTimedoutBeans started...");
        }
        // Go through each bucket in the cache and if there are entries in that
        // bucket scan them and select victims
        for (int index = 0; index < maxIndex ; index++) {

            if (buckets[index] != null) {
                synchronized (bucketLocks[index]) {
                    for (CacheItem item = buckets[index]; item != null; 
                         item = item.next) {
                        StatefulEJBContext ctx = 
                            (StatefulEJBContext) item.value;
                        //Note ctx can be null if bean is in BEING_REFRESHED state
                        if ((ctx != null) && 
                            (ctx.getLastAccessTime() <= idleThreshold) &&
                            ctx.canBePassivated()) {
                            LruCacheItem litem = (LruCacheItem)item;
                            synchronized (this) {
				if (currentCacheState != STATE_RUNNING) {
				    _logger.log(Level.WARNING, 
					"[" + cacheName + "]: Exiting TrimUnSortedTimedoutBeans() "
					+ "because current cache state: " + currentCacheState);
				    break;
				}
                                if (litem.isTrimmed == false) {
                                    itemRemoved(litem);
                                    litem.isTrimmed = true;
                                    victims.add(litem);
                                }
                            }
                        }
                    }
                }
                // Check and see if we have collected enough victims 
                // to start a cleaner task
                sz = victims.size();
                if (sz >= container.getPassivationBatchCount()) {
                    trimSelectedVictims(victims);
                    totalSize += sz;
                    victims.clear();
                }
            }
        }

        sz = victims.size();
        if (sz > 0) {
            trimSelectedVictims(victims);
            totalSize += sz;
        }
        if(_logger.isLoggable(Level.FINE)) {
            _logger.log(Level.FINE, "[" + cacheName + "]: TrimUnsortedTimedoutBeans "
                + " finished after removing " + totalSize + " idle beans");
        }
    }

    public int getNumVictimsAccessed() {
        return numVictimsAccessed;
    }

    protected CacheItem createItem(int hashCode, Object sessionKey, 
            Object value, int size)
    {
        return new LruSessionCacheItem(hashCode, sessionKey, value, size);
    }

    //*Class for LruSessionCacheItem
    protected static class LruSessionCacheItem
        extends LruCacheItem
    {

        protected byte waitCount;
        protected byte cacheItemState = CACHE_ITEM_VALID;

        protected LruSessionCacheItem(int hashCode, Object key, Object value, 
                               int size)
        {
            super(hashCode, key, value, size);
            this.cacheItemState = CACHE_ITEM_VALID;
        }

        protected LruSessionCacheItem(int hashCode, Object key, Object value, 
                               int size, byte state)
        {
            super(hashCode, key, value, size);
            this.cacheItemState = state;
        }
    }

    public void setConfigData(String configData) {
	this.configData = configData;
    }

    //Implementation of com.sun.ejb.spi.stats.EJBCacheStatsProvider

    public void appendStats(StringBuffer sbuf) {
	sbuf.append("[Cache: ")
	    .append("Size=").append(entryCount).append("; ")
	    .append("HitCount=").append(hitCount).append("; ")
	    .append("MissCount=").append(missCount).append("; ")
	    .append("Passivations=").append(getNumPassivations()).append("; ");
	if (configData != null) {
	    sbuf.append(configData);
	}
	sbuf.append("]");
    }

    public int getCacheHits() {
	return hitCount;
    }

    public int getCacheMisses() {
	return missCount;
    }

    public int getNumBeansInCache() {
	return entryCount;
    }

    public int getNumExpiredSessionsRemoved() {
	/*return (sfsbStoreMonitor == null)
        ? 0 : sfsbStoreMonitor.getNumExpiredSessionsRemoved(); */
        return 0;
    }

    public int getNumPassivationErrors() {
	/* return (sfsbStoreMonitor == null)
        ? 0 : sfsbStoreMonitor.getNumPassivationErrors(); */
        return 0;
    }

    public int getNumPassivations() {
	 /* return (sfsbStoreMonitor == null)
        ? 0 : sfsbStoreMonitor.getNumPassivations(); */
        return 0;
    }

    public int getNumPassivationSuccess() {
	/*return (sfsbStoreMonitor == null)
        ? 0 : sfsbStoreMonitor.getNumPassivationSuccess(); */
        return 0;
    }

    public void setMaxCacheSize(int val) {
	this.confMaxCacheSize = val;
    }

    public int getMaxCacheSize() {
	return confMaxCacheSize;
    }

}

Other Glassfish examples (source code examples)

Here is a short list of links related to this Glassfish LruSessionCache.java source code file:

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