Using Apollo to implement dynamic configuration management in Beego

With the development of the Internet and informatization, dynamic configuration management has become an increasingly popular application method. Configuration management can improve the maintainability, scalability and reliability of applications. In this article, I will introduce how to use Apollo to implement dynamic configuration management in the Beego framework.

1. What is dynamic configuration management

Dynamic configuration management means that applications can obtain configuration information and update it dynamically. Traditional static configuration management requires the redeployment of applications and cannot be changed during the application life cycle, while dynamic configuration management can update configuration information online without restarting the application, making operation and maintenance management easier.

2. Why use Apollo

Apollo is an open source configuration management platform developed by Ctrip.com. It provides a complete set of configuration management solutions to meet the needs of application scenarios of different sizes. Apollo supports the access of multi-language clients and can provide configuration management services for applications in different languages. In addition, Apollo has rich features, such as configuration version management, grayscale publishing, permission management, etc., which can meet the needs of enterprise-level applications.

3. How to use Apollo in Beego

1. Create Apollo client

Creating Apollo client requires writing a client program in Java, and Make it into a jar package. Introduce this jar package into the Beego application to use the Java API provided by Apollo. The following is a sample code for obtaining configuration information from Apollo:

Config config = ConfigService.getConfig("application");
String property = config.getProperty("key", "default_value");

In the above code, application is the name of the application created in Apollo, key is the name of the configuration item, and default_value is when the configuration value cannot be obtained. The default value returned.

2. Configuring Apollo information

To configure Apollo information in the Beego application, we can record the configuration information in the conf/app.conf configuration file, as shown below:

# Apollo配置
[apollo]
app_id = MyAppId
cluster = default
portal_url = http://apollo.xxx.com
namespace = application

Among them, app_id is the unique identifier of the Apollo application, cluster is the name of the cluster, portal_url is the address of Apollo's configuration center, and namespace is the namespace created in Apollo. When the application starts, read the Apollo configuration information in app.conf and initialize the Apollo client, as shown below:

import (
    "github.com/apolloconfig/agollo"
    "github.com/astaxie/beego"
)

func initApollo() {
    appID := beego.AppConfig.String("apollo::app_id")
    cluster := beego.AppConfig.String("apollo::cluster")
    portalURL := beego.AppConfig.String("apollo::portal_url")
    namespace := beego.AppConfig.String("apollo::namespace")

    agollo.InitCustomConfig(func() (*agollo.ConfFileContent, error) {
        return &agollo.ConfFileContent{
            AppID:     appID,
            Cluster:   cluster,
            Namespace: namespace,
            Endpoint:  portalURL,
        }, nil
    })
}

In the above code, the beego framework of the go language is used to introduce Apollo's Java API Package agollo and initialize the Apollo client based on the configuration information in conf/app.conf.

3. Listen to Apollo configuration

When the application starts, you can obtain the configuration information once through the Apollo client. Subsequently, we can also implement dynamic configuration management by monitoring Apollo's configuration updates. The sample code is as follows:

import (
    "github.com/apolloconfig/agollo"
)

func init() {
    agollo.OnUpdate(func(event *agollo.ApolloChangeEvent) {
        beego.Info("Apollo configuration updated, namespace: ", event.Namespace)
        // TODO: 处理配置更新事件
    })
}

In the above code, the agollo.OnUpdate function is used to listen to Apollo's configuration update event. In the event handler function, we can handle configuration update events, such as re-reading configuration information and updating the application's configuration.

4. Summary

This article introduces how to use Apollo to implement dynamic configuration management in Beego. First, we learned about the advantages of dynamic configuration management and the characteristics of Apollo. Then, we introduced Apollo's Java API package and initialized the Apollo client. Finally, we listened to Apollo's configuration update event and planned to re-read the configuration information to update the application's configuration. Through these steps, we can achieve simple and powerful dynamic configuration management.

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