1   /**
    2    *  Licensed to the Apache Software Foundation (ASF) under one or more
    3    *  contributor license agreements.  See the NOTICE file distributed with
    4    *  this work for additional information regarding copyright ownership.
    5    *  The ASF licenses this file to You under the Apache License, Version 2.0
    6    *  (the "License"); you may not use this file except in compliance with
    7    *  the License.  You may obtain a copy of the License at
    8    *
    9    *     http://www.apache.org/licenses/LICENSE-2.0
   10    *
   11    *  Unless required by applicable law or agreed to in writing, software
   12    *  distributed under the License is distributed on an "AS IS" BASIS,
   13    *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   14    *  See the License for the specific language governing permissions and
   15    *  limitations under the License.
   16    */
   17   package org.apache.geronimo.management.geronimo.stats;
   18   
   19   import javax.management.j2ee.statistics.Stats;
   20   import javax.management.j2ee.statistics.RangeStatistic;
   21   import javax.management.j2ee.statistics.TimeStatistic;
   22   import javax.management.j2ee.statistics.CountStatistic;
   23   
   24   /**
   25    * Statistics exposed by a Tomcat web connector (http, https)
   26    * 
   27    * @version $Rev: 726616 $ $Date: 2008-12-14 20:22:28 -0800 (Sun, 14 Dec 2008) $
   28    */
   29   public interface TomcatWebConnectorStats extends WebConnectorStats {
   30   
   31       /**
   32        * Gets the Time statistics (count, total, Max, Min) for requests (includes
   33        * figures across all requests since statistics gathering started)
   34        */
   35       TimeStatistic getRequestTime();
   36   
   37       /**
   38        * Gets the number of errors that have been returned since statistics
   39        * gathering started.
   40        */
   41       CountStatistic getErrorCount();
   42   
   43       /**
   44        * Gets the number of requests being processed concurrently (as well as the
   45        * min and max since statistics gathering started).
   46        */
   47       RangeStatistic getActiveRequestCount();
   48       
   49       /**
   50        * Gets the number of threads currently available (as well as min and max 
   51        * since statistics gathering started.
   52        * current - The number of threads currently in the pool (currentThreadCount)
   53        *         - the number of threads currently serving requests (currentThreadBusy)
   54        *  HiMark    - The maximum number of unused threads that will be allowed to exist 
   55        *              until the thread pool starts stopping the unnecessary threads(maxSpareThread)
   56        * UpperBound - The max number of threads created by the connector (maxThreads)
   57        * LowerBound - The number of threads created by the connector in the begining (minSpareThread)
   58        */        
   59       // This could be a container statistics
   60       RangeStatistic getSpareThreadCount();
   61   }