| /* |
| * 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.servicecomb.foundation.common; |
| |
| import java.util.Collection; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class RegisterManager<KEY, VALUE> { |
| private static final Logger LOGGER = LoggerFactory.getLogger(RegisterManager.class); |
| |
| private String name; |
| |
| private String registerErrorFmt = "Not allow register repeat data, name=%s, key=%s"; |
| |
| private Map<KEY, VALUE> objMap = new ConcurrentHashMap<>(); |
| |
| private Object lockObj = new Object(); |
| |
| protected Map<KEY, VALUE> getObjMap() { |
| return objMap; |
| } |
| |
| public RegisterManager(String name) { |
| this.name = name; |
| } |
| |
| public String getName() { |
| return name; |
| } |
| |
| public String getRegisterErrorFmt() { |
| return registerErrorFmt; |
| } |
| |
| public void setRegisterErrorFmt(String registerErrorFmt) { |
| this.registerErrorFmt = registerErrorFmt; |
| } |
| |
| public void register(KEY key, VALUE value) { |
| synchronized (lockObj) { |
| if (objMap.get(key) != null) { |
| // 不允许重复注册 |
| String msg = String.format(registerErrorFmt, name, key); |
| LOGGER.error(msg); |
| |
| // 禁止启动 |
| throw new Error(msg); |
| } |
| objMap.put(key, value); |
| } |
| } |
| |
| public VALUE findValue(KEY key) { |
| return objMap.get(key); |
| } |
| |
| public VALUE ensureFindValue(KEY key) { |
| VALUE value = objMap.get(key); |
| if (value == null) { |
| String msg = String.format("Can not find value, name=%s, key=%s", name, key); |
| throw new Error(msg); |
| } |
| |
| return value; |
| } |
| |
| public Collection<KEY> keys() { |
| return objMap.keySet(); |
| } |
| |
| public Collection<VALUE> values() { |
| return objMap.values(); |
| } |
| } |