| /* |
| * 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.instrumentation; |
| |
| import java.util.Date; |
| import java.util.Set; |
| |
| /** |
| * Interface for providing instrumented data cache metrics and operations. |
| */ |
| public interface QueryCacheInstrument { |
| |
| /** |
| * Returns number of total exec requests since start. |
| */ |
| long getTotalExecutionCount(); |
| |
| /** |
| * Returns number of total exec requests since start for |
| * the specified string-ified query key. |
| */ |
| long getTotalExecutionCount(String queryKey); |
| |
| /** |
| * Returns number of total execution requests since last reset |
| */ |
| long getExecutionCount(); |
| |
| /** |
| * Returns number of total execution requests since last reset for |
| * the specified string-ified query key. |
| */ |
| long getExecutionCount(String queryKey); |
| |
| /** |
| * Returns number of total read requests that have been found in cache since |
| * last reset. |
| */ |
| long getHitCount(); |
| |
| /** |
| * Returns number of total read requests that have been found in cache since |
| * last reset for the specified string-ified query key. |
| */ |
| long getHitCount(String queryKey); |
| |
| /** |
| * Returns number of total read requests that has been found since start. |
| */ |
| long getTotalHitCount(); |
| |
| /** |
| * Returns number of total read requests that has been found since start for |
| * the specified string-ified query key. |
| */ |
| long getTotalHitCount(String queryKey); |
| |
| /** |
| * Resets cache statistics |
| */ |
| void reset(); |
| |
| /** |
| * Returns date since cache statistics collection were last reset. |
| */ |
| Date sinceDate(); |
| |
| /** |
| * Returns date cache statistics collection started. |
| */ |
| Date startDate(); |
| |
| /** |
| * Returns all the string-ified keys for query results in the cache. |
| */ |
| Set<String> queryKeys(); |
| |
| /** |
| * Returns number of total evictions since last reset |
| */ |
| long getEvictionCount(); |
| |
| /** |
| * Returns number of total eviction requests since start. |
| */ |
| long getTotalEvictionCount(); |
| |
| /** |
| * Returns the number of total entries in the cache. |
| * @return entries |
| */ |
| long count(); |
| |
| } |