From 2e31d586873aca4a32b71ee780c71b92bcf07f28 Mon Sep 17 00:00:00 2001
From: gojomo <gojomo@daa5b2f2-a927-0410-8b2d-f5f262fa301a>
Date: Fri, 23 Oct 2009 22:33:36 +0000
Subject: [PATCH] * ObjectIdentityBdbCache.java     replace costly bdb size()
 operation with maintained counter

---
 .../main/java/org/archive/util/ObjectIdentityBdbCache.java  | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/commons/src/main/java/org/archive/util/ObjectIdentityBdbCache.java b/commons/src/main/java/org/archive/util/ObjectIdentityBdbCache.java
index 5ed56d48..771af365 100644
--- a/commons/src/main/java/org/archive/util/ObjectIdentityBdbCache.java
+++ b/commons/src/main/java/org/archive/util/ObjectIdentityBdbCache.java
@@ -88,6 +88,8 @@ implements ObjectIdentityCache<String, V>, Closeable, Serializable {
     /** The Collection view of the BDB JE database used for this instance. */
     protected transient StoredSortedMap<String, V> diskMap;
 
+    protected AtomicLong count;
+    
     //
     // USAGE STATS
     //
@@ -162,6 +164,7 @@ implements ObjectIdentityCache<String, V>, Closeable, Serializable {
         
         this.db = openDatabase(env, dbName);
         this.diskMap = createDiskMap(this.db, classCatalog, valueClass);
+        this.count = new AtomicLong(diskMap.size());
     }
 
     @SuppressWarnings("unchecked")
@@ -271,6 +274,7 @@ implements ObjectIdentityCache<String, V>, Closeable, Serializable {
                 // (rather than just the memMap until page-out)
                 // ensures diskMap.keySet() provides complete view
                 V prevVal = diskMap.putIfAbsent(key, valDisk); 
+                count.incrementAndGet();
                 if(prevVal!=null) {
                     // ERROR: diskMap modification since previous
                     // diskMap.get() should be impossible
@@ -343,7 +347,7 @@ implements ObjectIdentityCache<String, V>, Closeable, Serializable {
         if(db==null) {
             return 0; 
         }
-        return diskMap.size();
+        return (int) count.get();
     }
     
     protected String getDatabaseName() {