001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.camel.impl; 018 019import java.util.HashMap; 020import java.util.Map; 021import java.util.concurrent.atomic.AtomicInteger; 022 023import org.apache.camel.NamedNode; 024import org.apache.camel.spi.NodeIdFactory; 025 026/** 027 * Default id factory. 028 * 029 * @version 030 */ 031public class DefaultNodeIdFactory implements NodeIdFactory { 032 033 protected static Map<String, AtomicInteger> nodeCounters = new HashMap<String, AtomicInteger>(); 034 035 public String createId(NamedNode definition) { 036 String key = definition.getShortName(); 037 return key + getNodeCounter(key).incrementAndGet(); 038 } 039 040 /** 041 * Returns the counter for the given node key, lazily creating one if necessary 042 */ 043 protected static synchronized AtomicInteger getNodeCounter(String key) { 044 AtomicInteger answer = nodeCounters.get(key); 045 if (answer == null) { 046 answer = new AtomicInteger(0); 047 nodeCounters.put(key, answer); 048 } 049 return answer; 050 } 051 052 053 /** 054 * Helper method for test purposes that allows tests to start clean (made protected 055 * to ensure that it is not called accidentally) 056 */ 057 protected static synchronized void resetAllCounters() { 058 for (AtomicInteger counter : nodeCounters.values()) { 059 counter.set(0); 060 } 061 } 062}