com.alibaba.nacos.api.naming.utils.NamingUtils Maven / Gradle / Ivy
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/*
* Copyright 1999-2018 Alibaba Group Holding Ltd.
*
* Licensed 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 com.alibaba.nacos.api.naming.utils;
import com.alibaba.nacos.api.common.Constants;
import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.api.exception.api.NacosApiException;
import com.alibaba.nacos.api.model.v2.ErrorCode;
import com.alibaba.nacos.api.naming.pojo.Instance;
import com.alibaba.nacos.api.utils.StringUtils;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.regex.Pattern;
import static com.alibaba.nacos.api.common.Constants.CLUSTER_NAME_PATTERN_STRING;
import static com.alibaba.nacos.api.common.Constants.NUMBER_PATTERN_STRING;
/**
* NamingUtils.
*
* @author nkorange
* @since 1.0.0
*/
public class NamingUtils {
private static final Pattern CLUSTER_NAME_PATTERN = Pattern.compile(CLUSTER_NAME_PATTERN_STRING);
private static final Pattern NUMBER_PATTERN = Pattern.compile(NUMBER_PATTERN_STRING);
/**
* Returns a combined string with serviceName and groupName. serviceName can not be nil.
*
* In most cases, serviceName can not be nil. In other cases, for search or anything, See {@link
* com.alibaba.nacos.api.naming.utils.NamingUtils#getGroupedNameOptional(String, String)}
*
*
etc:
*
serviceName | groupName | result
* serviceA | groupA | groupA@@serviceA
* nil | groupA | threw IllegalArgumentException
*
* @return 'groupName@@serviceName'
*/
public static String getGroupedName(final String serviceName, final String groupName) {
if (StringUtils.isBlank(serviceName)) {
throw new IllegalArgumentException("Param 'serviceName' is illegal, serviceName is blank");
}
if (StringUtils.isBlank(groupName)) {
throw new IllegalArgumentException("Param 'groupName' is illegal, groupName is blank");
}
final String resultGroupedName = groupName + Constants.SERVICE_INFO_SPLITER + serviceName;
return resultGroupedName.intern();
}
public static String getServiceName(final String serviceNameWithGroup) {
if (StringUtils.isBlank(serviceNameWithGroup)) {
return StringUtils.EMPTY;
}
if (!serviceNameWithGroup.contains(Constants.SERVICE_INFO_SPLITER)) {
return serviceNameWithGroup;
}
return serviceNameWithGroup.split(Constants.SERVICE_INFO_SPLITER)[1];
}
public static String getGroupName(final String serviceNameWithGroup) {
if (StringUtils.isBlank(serviceNameWithGroup)) {
return StringUtils.EMPTY;
}
if (!serviceNameWithGroup.contains(Constants.SERVICE_INFO_SPLITER)) {
return Constants.DEFAULT_GROUP;
}
return serviceNameWithGroup.split(Constants.SERVICE_INFO_SPLITER)[0];
}
/**
* Check serviceName is compatibility mode or not.
*
* @param serviceName serviceName
* @return if serviceName is compatibility mode, return true
*/
public static boolean isServiceNameCompatibilityMode(final String serviceName) {
return !StringUtils.isBlank(serviceName) && serviceName.contains(Constants.SERVICE_INFO_SPLITER);
}
/**
* check combineServiceName format. the serviceName can't be blank.
*
* serviceName = "@@"; the length = 0; illegal
* serviceName = "group@@"; the length = 1; illegal
* serviceName = "@@serviceName"; the length = 2; illegal
* serviceName = "group@@serviceName"; the length = 2; legal
*
*
* @param combineServiceName such as: groupName@@serviceName
*/
public static void checkServiceNameFormat(String combineServiceName) {
String[] split = combineServiceName.split(Constants.SERVICE_INFO_SPLITER);
if (split.length <= 1) {
throw new IllegalArgumentException(
"Param 'serviceName' is illegal, it should be format as 'groupName@@serviceName'");
}
if (split[0].isEmpty()) {
throw new IllegalArgumentException("Param 'serviceName' is illegal, groupName can't be empty");
}
}
/**
* Returns a combined string with serviceName and groupName. Such as 'groupName@@serviceName'
* This method works similar with {@link com.alibaba.nacos.api.naming.utils.NamingUtils#getGroupedName} But not
* verify any parameters.
*
*
etc:
* serviceName | groupName | result
* serviceA | groupA | groupA@@serviceA
* nil | groupA | groupA@@
* nil | nil | @@
*
* @return 'groupName@@serviceName'
*/
public static String getGroupedNameOptional(final String serviceName, final String groupName) {
return groupName + Constants.SERVICE_INFO_SPLITER + serviceName;
}
/**
* Check instance param about keep alive.
*
*
* heart beat timeout must > heart beat interval
* ip delete timeout must > heart beat interval
*
*
* @param instance need checked instance
* @throws NacosException if check failed, throw exception
*/
public static void checkInstanceIsLegal(Instance instance) throws NacosException {
if (null == instance) {
throw new NacosApiException(NacosException.INVALID_PARAM, ErrorCode.INSTANCE_ERROR,
"Instance can not be null.");
}
if (instance.getInstanceHeartBeatTimeOut() < instance.getInstanceHeartBeatInterval()
|| instance.getIpDeleteTimeout() < instance.getInstanceHeartBeatInterval()) {
throw new NacosApiException(NacosException.INVALID_PARAM, ErrorCode.INSTANCE_ERROR,
"Instance 'heart beat interval' must less than 'heart beat timeout' and 'ip delete timeout'.");
}
if (!StringUtils.isEmpty(instance.getClusterName()) && !CLUSTER_NAME_PATTERN.matcher(instance.getClusterName()).matches()) {
throw new NacosApiException(NacosException.INVALID_PARAM, ErrorCode.INSTANCE_ERROR,
String.format("Instance 'clusterName' should be characters with only 0-9a-zA-Z-. (current: %s)",
instance.getClusterName()));
}
}
/**
* check batch register is Ephemeral.
* @param instance instance
* @throws NacosException NacosException
*/
public static void checkInstanceIsEphemeral(Instance instance) throws NacosException {
if (!instance.isEphemeral()) {
throw new NacosApiException(NacosException.INVALID_PARAM, ErrorCode.INSTANCE_ERROR,
String.format("Batch registration does not allow persistent instance registration , Instance：%s", instance));
}
}
/**
* Batch verify the validity of instances.
* @param instances List of instances to be registered
* @throws NacosException Nacos
*/
public static void batchCheckInstanceIsLegal(List instances) throws NacosException {
Set newInstanceSet = new HashSet<>(instances);
for (Instance instance : newInstanceSet) {
checkInstanceIsEphemeral(instance);
checkInstanceIsLegal(instance);
}
}
/**
* Check string is a number or not.
*
* @param str a string of digits
* @return if it is a string of digits, return true
*/
public static boolean isNumber(String str) {
return !StringUtils.isEmpty(str) && NUMBER_PATTERN.matcher(str).matches();
}
}