40 lines
1.1 KiB
Java
40 lines
1.1 KiB
Java
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package com.usthe.alert.util;
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import lombok.extern.slf4j.Slf4j;
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import java.util.Map;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/**
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* 告警模版关键字匹配替换引擎工具
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* @author tom
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* @date 2021/12/10 11:53
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*/
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@Slf4j
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public class AlertTemplateUtil {
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/**
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* 匹配 ${key} 的变量
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* eg: Alert, the instance: ${instance} metrics: ${metrics} is over flow.
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*/
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private static final Pattern PATTERN = Pattern.compile("\\$\\{(\\w+)\\}");
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public static String render(String template, Map<String, Object> replaceData) {
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try {
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Matcher matcher = PATTERN.matcher(template);
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StringBuffer buffer = new StringBuffer();
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while (matcher.find()) {
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Object objectValue = replaceData.getOrDefault(matcher.group(1), "NullValue");
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String value = objectValue.toString();
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matcher.appendReplacement(buffer, value);
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}
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matcher.appendTail(buffer);
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return buffer.toString();
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} catch (Exception e) {
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log.error(e.getMessage(), e);
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return template;
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}
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}
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}
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