[武汉|结业弟子]JAVA-王全|2019年10月14日的日报-技能树.IT修真院

发表于： 2019-10-14 18:40:52

1 898

今天做了什么

server打jar包运行:

得在pom中加入插件:

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-shade-plugin</artifactId>
  <version>1.4</version>
  <executions>
    <execution>
      <phase>package</phase>
      <goals>
        <goal>shade</goal>
      </goals>
      <configuration>
        <filters>
          <filter>
            <artifact>*:*</artifact>
            <excludes>
              <exclude>META-INF/*.SF</exclude>
              <exclude>META-INF/*.DSA</exclude>
              <exclude>META-INF/*.RSA</exclude>
            </excludes>
          </filter>
        </filters>
        <transformers>
          <transformer
                  implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
            <!--这一句很重要,指定程序的入口-->
            <mainClass>com.server.MajorServer</mainClass>
          </transformer>
          <transformer
                  implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
            <resource>META-INF/spring.handlers</resource>
          </transformer>
          <transformer
                  implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
            <resource>META-INF/spring.schemas</resource>
          </transformer>
        </transformers>
      </configuration>
    </execution>
  </executions>
</plugin>

部署两台Service,在Web中随机访问一台Service:

方法一.使用cluster4spring.jar ; 当调用一个服务失败时,它可以切换到服务列表中的另一个服务端.

<bean id="majorRMI"
      class="org.softamis.cluster4spring.rmi.RmiUrlListProxyFactoryBean" parent="rmiClientSetting">
    <!--调用服务接口-->
    <property name="serviceInterface" value="com.service.MajorService"/>
    <!--远程对象地址list ，如果第一个无法使用，会抛异常，然后使用第二个去调用远程对象方法返回结果-->
    <property name="serviceURLs" >
        <list>
            <value>rmi://localhost:1099/majorService</value>
            <value>rmi://localhost:1199/majorService</value>
        </list>
    </property>
    <!-- 调用时选择哪个url的策略 -->
    <property name="endpointSelectionPolicy">
        <bean class="org.softamis.cluster4spring.support.invocation.InTurnEndpointSelectionPolicy"/>
    </property>
</bean>

方法二.使用基础的if else, 通过生成随机数来实现随机切换服务端.

public class SwitchService {
    private static final Logger log = LogManager.getLogger(SwitchService.class);
    private static ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
    public static UserService getUSerService(){
        UserService userService = null;
        Random random = new Random();
        if (random.nextInt(2)==1){
            try{
                log.error("get connection to server1");
                userService = (UserService) context.getBean("majorRMI1");
            } catch (Exception e){
                log.error("connect to server1 failed.turn to server2");
                userService = (UserService) context.getBean("majorRMI2");
            }
        }else {
            try{
                log.error("get connection to server2");
                userService = (UserService) context.getBean("majorRMI2");
            } catch (Exception e){
                log.error("connect to server2 failed.turn to server1");
                userService = (UserService) context.getBean("majorRMI1");
            }
        }
        return userService;
    }
}

收获

问题

运行客户端时报错:

org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.softamis.cluster4spring.rmi.RmiUrlListProxyFactoryBean] for bean with name 'majorRMI' defined in class path resource [spring-config-client.xml]; nested exception is java.lang.ClassNotFoundException: org.softamis.cluster4spring.rmi.RmiUrlListProxyFactoryBean

找不到[spring-config-client.xml]中的类"org.softamis.cluster4spring.rmi.RmiUrlListProxyFactoryBean".

不清楚出错原因.

明天计划