hystrix文档翻译之开始使用

获取包

　　使用maven获取包。

<dependency>
    <groupId>com.netflix.hystrix</groupId>
    <artifactId>hystrix-core</artifactId>
    <version>x.y.z</version>
</dependency>

　　使用lvy获取包

<dependency org="com.netflix.hystrix" name="hystrix-core" rev="x.y.z" />

　　如果希望使用maven下载包

<?xml version="1.0"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.netflix.hystrix.download</groupId>
    <artifactId>hystrix-download</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>Simple POM to download hystrix-core and dependencies</name>
    <url>http://github.com/Netflix/Hystrix</url>
    <dependencies>
        <dependency>
            <groupId>com.netflix.hystrix</groupId>
            <artifactId>hystrix-core</artifactId>
            <version>x.y.z</version>
            <scope/>
        </dependency>
    </dependencies>
</project>

　　然后执行

mvn -f download-hystrix-pom.xml dependency:copy-dependencies

　　它将会下载hystrix-core-*.jar和他的依赖包。

　　使用hystrix的一个简单例子：

public class CommandHelloWorld extends HystrixCommand<String> {

    private final String name;

    public CommandHelloWorld(String name) {
        super(HystrixCommandGroupKey.Factory.asKey("ExampleGroup"));
        this.name = name;
    }

    @Override
    protected String run() {
        // a real example would do work like a network call here
        return "Hello " + name + "!";
    }
}

　　有一下三种方式调用命令

String s = new CommandHelloWorld("Bob").execute();
Future<String> s = new CommandHelloWorld("Bob").queue();
Observable<String> s = new CommandHelloWorld("Bob").observe();

编译hystrix

　　checkout源码并编译

$ git clone git@github.com:Netflix/Hystrix.git
$ cd Hystrix/
$ ./gradlew build

　　执行 clean build

$ ./gradlew clean build