HostUtils.java

// Licensed to the Apache Software Foundation (ASF) under one
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// 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
//
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package org.apache.doris.common.util;

import com.github.benmanes.caffeine.cache.CacheLoader;
import com.github.benmanes.caffeine.cache.Caffeine;
import com.github.benmanes.caffeine.cache.LoadingCache;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import java.net.InetAddress;
import java.util.concurrent.TimeUnit;

/**
 * HostUtils
 */
public class HostUtils {

    private static final Logger LOG = LogManager.getLogger(HostUtils.class);
    private static final LoadingCache<String, String> HOST_TO_IP_CACHE = Caffeine.newBuilder()
            .expireAfterWrite(10, TimeUnit.MINUTES)
            .maximumSize(1000)
            .build(new CacheLoader<String, String>() {
                @Override
                public String load(String host) {
                    try {
                        InetAddress address = InetAddress.getByName(host);
                        return address.getHostAddress();
                    } catch (Exception e) {
                        LOG.warn("Failed to resolve host {} to IP: {}", host, e.getMessage());
                        return "Unknown";
                    }
                }
            });

    /**
     * resolve ip from hostname
     */
    public static String resolveHostToIp(String host) {
        return HOST_TO_IP_CACHE.get(host);
    }

}