第一章 SOFAArk 类隔离技术使用姿势

SOFAArk 是一个轻量级的类隔离框架，由蚂蚁金服开源。GitHub 地址： https://github.com/sofastack/sofa-ark

本文使用 SOFAArk 实现一个基本的类隔离例子，工程结构如下：

image.png

my-ark-service：基本的服务，会打两个不同版本的包：1.0和2.0。

my-ark-plugin1：依赖 my-ark-service:1.0，打成一个 ark-plugin。

my-ark-plugin2：依赖 my-ark-service:2.0，打成一个 ark-plugin。

my-ark-biz：依赖 my-ark-plugin1 和 my-ark-plugin2，分别调用其两个 ark-plugin，由于使用了类隔离机制，可以使得 my-ark-service:1.0 和 my-ark-service:2.0 两个版本的包共存并且同时使用。

my-ark-service

v1 版本

<?xml version="1.0" encoding="UTF-8"?>
<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>io.study</groupId>
    <artifactId>my-ark-service</artifactId>
    <version>1.0</version>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

package io.study.service;
public class HelloService {
    public void sayHello(){
        System.out.println("hi, v1"); // v1版本
    }
}

v2 版本

<?xml version="1.0" encoding="UTF-8"?>
<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>io.study</groupId>
    <artifactId>my-ark-service</artifactId>
    <version>2.0</version>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

package io.study.service;
public class HelloService {
    public void sayHello(){
        System.out.println("hi, v2"); // v2版本
    }
}

my-ark-plugin1

<?xml version="1.0" encoding="UTF-8"?>
<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>io.study</groupId>
    <artifactId>my-ark-plugin1</artifactId>
    <version>1.0</version>

    <dependencies>
        <!-- 引入版本1.0依赖 -->
        <dependency>
            <groupId>io.study</groupId>
            <artifactId>my-ark-service</artifactId>
            <version>1.0</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>com.alipay.sofa</groupId>
                <artifactId>sofa-ark-plugin-maven-plugin</artifactId>
                <version>1.1.0</version>
                <executions>
                    <execution>
                        <id>default-cli</id>
                        <goals>
                            <goal>ark-plugin</goal>
                        </goals>
                        <configuration>
                            <classifier>ark-plugin</classifier>
                            <exported>
                                <classes>
                                    <class>io.study.plugin.ArkPlugin1Service</class>
                                </classes>
                            </exported>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

package io.study.plugin;
import io.study.service.HelloService;
public class ArkPlugin1Service {
    public void test(){
        new HelloService().sayHello();
    }
}

my-ark-plugin2

<?xml version="1.0" encoding="UTF-8"?>
<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>io.study</groupId>
    <artifactId>my-ark-plugin2</artifactId>
    <version>1.0</version>

    <dependencies>
        <dependency>
            <groupId>io.study</groupId>
            <artifactId>my-ark-service</artifactId>
            <version>2.0</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>com.alipay.sofa</groupId>
                <artifactId>sofa-ark-plugin-maven-plugin</artifactId>
                <version>1.1.0</version>
                <executions>
                    <execution>
                        <id>default-cli</id>
                        <goals>
                            <goal>ark-plugin</goal>
                        </goals>
                        <configuration>
                            <classifier>ark-plugin</classifier>
                            <exported>
                                <classes>
                                    <class>io.study.plugin.ArkPlugin2Service</class>
                                </classes>
                            </exported>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

package io.study.plugin;
import io.study.service.HelloService;
public class ArkPlugin2Service {
    public void test(){
        new HelloService().sayHello();
    }
}

my-ark-biz

<?xml version="1.0" encoding="UTF-8"?>
<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>io.study</groupId>
    <artifactId>my-ark-biz</artifactId>
    <version>1.0</version>

    <dependencies>
        <dependency>
            <groupId>com.alipay.sofa</groupId>
            <artifactId>sofa-ark-support-starter</artifactId>
            <version>1.1.0</version>
        </dependency>
        <dependency>
            <groupId>io.study</groupId>
            <artifactId>my-ark-plugin1</artifactId>
            <version>1.0</version>
            <!-- ark-plugin -->
            <classifier>ark-plugin</classifier>
        </dependency>
        <dependency>
            <groupId>io.study</groupId>
            <artifactId>my-ark-plugin2</artifactId>
            <version>1.0</version>
            <!-- ark-plugin -->
            <classifier>ark-plugin</classifier>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>com.alipay.sofa</groupId>
                <artifactId>sofa-ark-maven-plugin</artifactId>
                <version>1.1.0</version>
                <executions>
                    <execution>
                        <id>default-cli</id>
                        <!--goal executed to generate executable-ark-jar -->
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                        <configuration>
                            <!--specify destination where executable-ark-jar will be saved, default saved to ${project.build.directory}-->
                            <outputDirectory>./</outputDirectory>
                            <!--default none, 可执行fat jar-->
                            <arkClassifier>executable-ark</arkClassifier>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

package io.study.biz;
import com.alipay.sofa.ark.support.startup.SofaArkBootstrap;
import io.study.plugin.ArkPlugin1Service;
import io.study.plugin.ArkPlugin2Service;
public class Main {
    public static void main(String[] args) {
        SofaArkBootstrap.launch(args);
        new ArkPlugin1Service().test(); // hi,v1
        new ArkPlugin2Service().test(); // hi,v2
    }
}

本文代码地址

参考

Java隔离容器之sofa-ark使用说明及源码解析