ons-core/ons-client/src/main/java/org/apache/rocketmq/ons/api/impl/util/NameAddrUtils.java

/*
 * 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.rocketmq.ons.api.impl.util;

import java.util.regex.Pattern;

import org.apache.rocketmq.common.MixAll;

import org.apache.commons.lang3.StringUtils;

public class NameAddrUtils {
    public static final String INSTANCE_PREFIX = "MQ_INST_";
    public static final String INSTANCE_REGEX = INSTANCE_PREFIX + "\\w+_\\w+";
    public static final String ENDPOINT_PREFIX = "http://";
    public static final Pattern NAMESRV_ENDPOINT_PATTERN = Pattern.compile("^" + ENDPOINT_PREFIX + ".*");
    public static final Pattern INST_ENDPOINT_PATTERN = Pattern.compile("^" + ENDPOINT_PREFIX + INSTANCE_REGEX + "\\..*");

    public static String getNameAdd() {
        return System.getProperty(MixAll.NAMESRV_ADDR_PROPERTY, System.getenv(MixAll.NAMESRV_ADDR_ENV));
    }

    public static boolean validateInstanceEndpoint(String endpoint) {
        return INST_ENDPOINT_PATTERN.matcher(endpoint).matches();
    }

    public static String parseInstanceIdFromEndpoint(String endpoint) {
        if (StringUtils.isEmpty(endpoint)) {
            return null;
        }
        return endpoint.substring(ENDPOINT_PREFIX.length(), endpoint.indexOf('.'));
    }
}