19、微服务集成与部署：从Ballerina到Docker的技术之旅

微服务集成与部署：从Ballerina到Docker的技术之旅

1. Ballerina的弹性与安全集成

Ballerina编写的集成微服务天生具有弹性，能以弹性和类型安全的方式调用外部端点。例如，调用可能不可靠的外部端点时，可使用特定协议的断路器来规避交互问题，只需在客户端端点代码中传递几个额外参数即可。

// circuit breaker example
endpoint http:Client backendClientEP {
    circuitBreaker: {
        rollingWindow: { // failure calculation window
            timeWindowMillis:10000,
            bucketSizeMillis:2000
        },
        failureThreshold:0.2, // failure percentage threshold to open the circuit
        resetTimeMillis:10000, // time it takes to bring the circuit from open to half-close state
        statusCodes:[400, 404, 500] // HTTP status codes that are considered as failures
    },
    url: "http://localhost:8080",
    timeoutMillis:2000,
};