Netflix Archaius 动态配置

Question

我正在将 Hystrix 集成到我现有的项目中，并且我想从 xml 文件中读取配置值，而不是使用 Configuration Manager 提供配置属性。当 xml 文件中的值更新时，我希望在运行时更新 Hystrix 配置。

这是我正在遵循的指南： https://github.com/Netflix/archaius/wiki/Users-Guide

目前我了解可以使用 PolledConfigurationSource 和以下代码：

PolledConfigurationSource source = ...
AbstractPollingScheduler scheduler = ...
DynamicConfiguration configuration = new DynamicConfiguration(source, scheduler);
ConfigurationManager.install(configuration);

如何将 PolledConfigurationSource 指向 xml 文件以在固定时间间隔后读取属性？

Answer 1

以下代码对我有用

private void initializeConfiguration() {

    // FixedDelayPollingScheduler is initialized with default system
    // settings
    // Fixed delay in milliseconds between two reads of the configuration
    // URLs
    // archaius.fixedDelayPollingScheduler.delayMills = 60000
    // Initial delay in milliseconds of reading from the configuration
    // source
    // archaius.fixedDelayPollingScheduler.initialDelayMills = 30000
    AbstractPollingScheduler scheduler = new FixedDelayPollingScheduler();

    // Configuration source that brings dynamic changes to the configuration
    // via polling
    PolledConfigurationSource source = new XMLPolledConfigurationSource();

    // Configuration that polls a PolledConfigurationSource according to the
    // schedule set by a scheduler
    DynamicConfiguration configuration = new DynamicConfiguration(source, scheduler);

    ConfigurationManager.install(configuration);

    // Registering configuration with an MBean and will be accessible for
    // read and update via JConsole
    ConfigJMXManager.registerConfigMbean(configuration);
}

XMLPolledConfigurationSource源代码

public class XMLPolledConfigurationSource implements PolledConfigurationSource {

@SuppressWarnings("static-access")
@Override
public PollResult poll(boolean inital, Object checkPoint) throws Exception {
    PollResult pollResult = null;
    Map<String, Object> map = new HashMap<>();
    // Code to read content from the resource
    return pollResult.createFull(map);
  }
}

Answer 2

您是否尝试过按照文档设置此系统变量？ -Darchaius.configurationSource.additionalUrls=file:///apps/myapp/application.xml 通过文档，我指的是入门网页https://github.com/Netflix/archaius/wiki/Getting-Started