Java tutorial
/* * 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.commons.pool; /** * Test pooled object class. Keeps track of how many times it has been * validated, activated, passivated. * */ public class VisitTracker { private int validateCount = 0; private int activateCount = 0; private int passivateCount = 0; private boolean destroyed = false; private int id = 0; private Object key = null; public VisitTracker() { super(); reset(); } public VisitTracker(int id) { super(); this.id = id; reset(); } public VisitTracker(int id, Object key) { super(); this.id = id; this.key = key; reset(); } public boolean validate() { if (destroyed) { fail("attempted to validate a destroyed object"); } validateCount++; return true; } public void activate() { if (destroyed) { fail("attempted to activate a destroyed object"); } activateCount++; } public void passivate() { if (destroyed) { fail("attempted to passivate a destroyed object"); } passivateCount++; } public void reset() { validateCount = 0; activateCount = 0; passivateCount = 0; destroyed = false; } public void destroy() { destroyed = true; } public int getValidateCount() { return validateCount; } public int getActivateCount() { return activateCount; } public int getPassivateCount() { return passivateCount; } public boolean isDestroyed() { return destroyed; } public int getId() { return id; } public Object getKey() { return key; } public String toString() { return "Key: " + key + " id: " + id; } private void fail(String message) { throw new IllegalStateException(message); } }