/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.jackrabbit.core.query.lucene;

import java.util.Map;
import java.util.WeakHashMap;

/**
 * <code>IOCounters</code> provides a basic mechanism to track I/O during query
 * execution.
 */
public class IOCounters {

    private static final Map<Thread, Long> counts =
        new WeakHashMap<Thread, Long>();

    /**
     * @return the current read count for caused by the current thread.
     */
    public static synchronized long getReads() {
        Long count = counts.get(Thread.currentThread());
        return count != null ? count : 0;
    }

    /**
     * Increments the read count caused by the current thread.
     */
    public static synchronized void incrRead() {
        counts.put(Thread.currentThread(), getReads() + 1);
    }
}

@@ -899,16 +899,74 @@
 shMap;%0A%0A
+import org.slf4j.Logger;%0Aimport org.slf4j.LoggerFactory;%0A%0A
 /**%0A * %3C
@@ -1086,16 +1086,98 @@
 ters %7B%0A%0A
+    private static final Logger log = LoggerFactory.getLogger(IOCounters.class);%0A%0A
     priv
@@ -1602,29 +1602,16 @@
  static 
-synchronized 
 void inc
@@ -1616,16 +1616,98 @@
 ncrRead(
+) %7B%0A        if (log.isDebugEnabled()) %7B%0A            synchronized (IOCounters.class
 ) %7B%0A    
@@ -1710,16 +1710,24 @@
         
+  
+      
 counts.p
@@ -1770,16 +1770,40 @@
 ) + 1);%0A
+            %7D%0A        %7D%0A
     %7D%0A%7D%0A

Disable IOCounters based on log level