org.apache.openjpa.datacache.CacheStatistics Maven / Gradle / Ivy
/*
* 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.openjpa.datacache;
import java.io.Serializable;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import org.apache.openjpa.util.OpenJPAId;
/**
* Counts number of read/write requests and hit ratio for a cache in total and
* per-class basis.
*
* All methods with Class as input argument treats null as
* java.lang.Object. All per-class statistics depends on
* determining the runtime type of the instance being cached. If it is not
* possible to determine the runtime type from the given context, the statistics
* is registered under generic java.lang.Object.
*
* @since 1.3.0
*/
public interface CacheStatistics extends Serializable {
/**
* Gets number of total read requests since last reset.
*/
public long getReadCount();
/**
* Gets number of total read requests that has been found in cache since
* last reset.
*/
public long getHitCount();
/**
* Gets number of total write requests since last reset.
*/
public long getWriteCount();
/**
* Gets number of total read requests since start.
*/
public long getTotalReadCount();
/**
* Gets number of total read requests that has been found in cache since
* start.
*/
public long getTotalHitCount();
/**
* Gets number of total write requests since start.
*/
public long getTotalWriteCount();
/**
* Gets number of total read requests for the given class since last reset.
*
* @deprecated - should use getReadCount(String c)
*/
public long getReadCount(Class cls);
/**
* Gets number of total read requests for the given class since last reset.
*/
public long getReadCount(String c);
/**
* Gets number of total read requests that has been found in cache for the given class since last reset.
*
* @deprecated - should use getHitCount(String c)
*/
public long getHitCount(Class cls);
/**
* Gets number of total read requests that has been found in cache for the given class since last reset.
*/
public long getHitCount(String c);
/**
* Gets number of total write requests for the given class since last reset.
*
* @deprecated - should use getWriteCount(String c)
*/
public long getWriteCount(Class cls);
/**
* Gets number of total write requests for the given class since last reset.
*/
public long getWriteCount(String c);
/**
* Gets number of total read requests for the given class since start.
*
* @deprecated - should use getTotalReadCount(String c)
*/
public long getTotalReadCount(Class cls);
/**
* Gets number of total read requests for the given class since start.
*/
public long getTotalReadCount(String c);
/**
* Gets number of total read requests that has been found in cache for the given class since start.
*/
public long getTotalHitCount(String c);
/**
* Gets number of total read requests that has been found in cache for the given class since start.
*
* @deprecated - should use getTotalHitCount(String c)
*/
public long getTotalHitCount(Class cls);
/**
* Gets number of total write requests for the given class since start.
*/
public long getTotalWriteCount(String c);
/**
* Gets number of total write requests for the given class since start.
*
* @deprecated - should use getTotalWriteCount(String c)
*/
public long getTotalWriteCount(Class cls);
/**
* Gets the time of last reset.
*/
public Date since();
/**
* Gets the time of start.
*/
public Date start();
/**
* Clears all accumulated statistics.
*/
public void reset();
/**
* Returns whether or not statistics will be collected.
*/
public boolean isEnabled();
/**
* Returns the types that are known to this cache being tracked.
*/
public Set classNames();
public Map toMap();
}