如何使用 netflix archaius API 读取 xml 文件键值？答案

【问题标题】：How to read xml file key value using netflix archaius API?如何使用 netflix archaius API 读取 xml 文件键值？
【发布时间】：2018-04-20 17:36:20
【问题描述】：

我是 Netflix Archaius 的新手。谁能提供示例代码以从 xml 文件中读取键值？还希望看到值在我更改 XML 文件中的任何键时自动更新...

问候，阿什什

【问题讨论】：

标签： netflix-archaius

【解决方案1】：

关于如何将 xml 用于键/值对以及如何使用 Archaius 自动加载更改的 JUnit 示例：

示例代码重要说明：程序在第一次回调后退出。如果要测试更多回调，请增加类变量 'latch' 处的计数器

package com.apple.paymentgateway.config;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CountDownLatch;

import org.apache.commons.configuration.XMLPropertiesConfiguration;
import org.junit.Test;

import com.netflix.config.AbstractPollingScheduler;
import com.netflix.config.ConcurrentMapConfiguration;
import com.netflix.config.ConfigurationManager;
import com.netflix.config.DynamicConfiguration;
import com.netflix.config.DynamicPropertyFactory;
import com.netflix.config.DynamicStringProperty;
import com.netflix.config.FixedDelayPollingScheduler;
import com.netflix.config.PollResult;
import com.netflix.config.PolledConfigurationSource;

public class TestArchaius {
    CountDownLatch latch = new CountDownLatch(1);

    @Test
    public void tes() throws Exception {
        AbstractPollingScheduler scheduler = new FixedDelayPollingScheduler(0, 1000, false);
        DynamicConfiguration dynamicConfiguration = new DynamicConfiguration(new MyPolledConfigurationSource(), scheduler);

        ConfigurationManager.install(dynamicConfiguration);

        DynamicStringProperty fieldsProperty = DynamicPropertyFactory.getInstance().getStringProperty("key1", "");
        fieldsProperty.addCallback(() -> {
            System.out.println(fieldsProperty.get());
            latch.countDown();
        });

        latch.await();
    }

    class MyPolledConfigurationSource implements PolledConfigurationSource {

        @Override
        public PollResult poll(boolean initial, Object checkPoint) throws Exception {
            ConcurrentMapConfiguration configFromPropertiesFile = new ConcurrentMapConfiguration(
                    new XMLPropertiesConfiguration("test.xml"));
            Map<String, Object> fullProperties = new HashMap<String, Object>();
            configFromPropertiesFile.getProperties().forEach((k, v) -> fullProperties.put((String) k, v));
            return PollResult.createFull(fullProperties);
        }

    }
}

test.xml：

     <!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">
     <properties>
       <comment>Description of the property list</comment>
       <entry key="key1">value1</entry>
       <entry key="key2">value2</entry>
       <entry key="key3">value3</entry>
     </properties>

【讨论】：