从零开始认识Dubbo
1.Dubbo是什么
Apache Dubbo™ 是一款高性能Java RPC框架。
Dubbo是一个分布式服务框架，致力于提供高性能和透明化的RPC远程服务调用方案，以及SOA服务治理方案。简单的说，dubbo就是个服务框架，如果没有分布式的需求，其实是不需要用的，只有在分布式的时候，才有dubbo这样的分布式服务框架的需求，并且本质上是个服务调用的东东，说白了就是个远程服务调用的分布式框架（告别Web Service模式中的WSdl，以服务者与消费者的方式在dubbo上注册）
其核心部分包含:
远程通讯: 提供对多种基于长连接的NIO框架抽象封装，包括多种线程模型，序列化，以及“请求-响应”模式的信息交换方式。
集群容错: 提供基于接口方法的透明远程过程调用，包括多协议支持，以及软负载均衡，失败容错，地址路由，动态配置等集群支持。
自动发现: 基于注册中心目录服务，使服务消费方能动态的查找服务提供方，使地址透明，使服务提供方可以平滑增加或减少机器。
2.Dubbo能做什么
- 透明化的远程方法调用，就像调用本地方法一样调用远程方法，只需简单配置，没有任何API侵入。
- 软负载均衡及容错机制，可在内网替代F5等硬件负载均衡器，降低成本，减少单点。
- 服务自动注册与发现，不再需要写死服务提供方地址，注册中心基于接口名查询服务提供者的IP地址，并且能够平滑添加或删除服务提供者。
Dubbo采用全spring配置方式，透明化接入应用，对应用没有任何API侵入，只需用Spring加载Dubbo的配置即可，Dubbo基于Spring的Schema扩展进行加载。
3.Dubbo架构
节点角色说明：
Provider: 暴露服务的服务提供方。
Consumer: 调用远程服务的服务消费方。
Registry: 服务注册与发现的注册中心。
Monitor: 统计服务的调用次调和调用时间的监控中心。
Container: 服务运行容器。
调用关系说明：
服务容器负责启动，加载，运行服务提供者。
服务提供者在启动时，向注册中心注册自己提供的服务。
服务消费者在启动时，向注册中心订阅自己所需的服务。
注册中心返回服务提供者地址列表给消费者，如果有变更，注册中心将基于长连接推送变更数据给消费者。
服务消费者，从提供者地址列表中，基于软负载均衡算法，选一台提供者进行调用，如果调用失败，再选另一台调用。
服务消费者和提供者，在内存中累计调用次数和调用时间，定时每分钟发送一次统计数据到监控中心。
4.Dubbo的使用方法
Dubbo采用全Spring配置方式，透明化接入应用，对应用没有任何API侵入，只需用Spring加载Dubbo的配置即可，Dubbo基于Spring的Schema扩展进行加载。如果不想使用Spring配置，可以通过API的方式进行调用（注解式，不推荐使用）
下载安装zookeeper注册中心（不建议使用multicast）
1.Windows
下载地址：https://www.apache.org/dyn/closer.cgi/zookeeper/
使用方法：下载解压即可，进入解压目录运行zkServer.cmd启动注册服务中心
截图：
2.MacOS
下载地址：https://www.apache.org/dyn/closer.cgi/zookeeper/
使用方法：下载解压即可，进入解压目录运行zkServer.sh start启动注册服务中心
3.Linux
下载地址：https://www.apache.org/dyn/closer.cgi/zookeeper/
使用方法：下载解压即可，进入解压目录运行zkServer.sh start启动注册服务中心
服务提供者
1.定义服务接口(该接口需单独打包，在服务提供方和消费方共享)
DemoService.java
package org.apache.dubbo.demo;
public interface DemoService {
String sayHello(String name);
}
2.服务提供方实现接口：(对服务消费方隐藏实现)
DemoServiceImpl.java
package org.apache.dubbo.demo.provider;
import org.apache.dubbo.demo.DemoService;
public class DemoServiceImpl implements DemoService {
public String sayHello(String name) {
return "Hello " + name;
}
}
3.用Spring配置声明暴露服务：
dubbo-provider.xml：
?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:dubbo="http://dubbo.apache.org/schema/dubbo"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd http://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd">
<!-- 提供方应用信息，用于计算依赖关系 -->
<dubbo:application name="hello-world-app" />
<!-- 使用multicast广播注册中心暴露服务地址 -->
<dubbo:registry address="multicast://224.5.6.7:1234" />
<!-- 用dubbo协议在20880端口暴露服务 -->
<dubbo:protocol name="dubbo" port="20880" />
<!-- 声明需要暴露的服务接口 -->
<dubbo:service interface="org.apache.dubbo.demo.DemoService" ref="demoService" />
<!-- 和本地bean一样实现服务 -->
<bean id="demoService" class="org.apache.dubbo.demo.provider.DemoServiceImpl" />
</beans>
4.加载Spring配置，启动服务：
Provider.java：
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Provider {
public static void main(String[] args) throws Exception {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"spring/dubbo-provider.xml"});
context.start();
System.in.read(); // 按任意键退出
}
}
或者使用springBoot启动
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ImportResource;
@SpringBootApplication
@ImportResource("spring/dubbo-provider.xml")
public class DubboProviderApplication {
public static void main(String[] args) throws Exception {
SpringApplication.run(DubboProviderApplication.class, args);
}
}
服务消费者：
applicationContext-dubbo.xml 中注册自己需要调用的接口。
1.通过Spring配置引用远程服务
dubbo-consumer.xml：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:dubbo="http://dubbo.apache.org/schema/dubbo"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd http://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd">
<!-- 消费方应用名，用于计算依赖关系，不是匹配条件，不要与提供方一样 -->
<dubbo:application name="consumer-of-helloworld-app" />
<!-- 使用multicast广播注册中心暴露发现服务地址 -->
<dubbo:registry address="multicast://224.5.6.7:1234" />
<!-- 生成远程服务代理，可以和本地bean一样使用demoService -->
<dubbo:reference id="demoService" interface="org.apache.dubbo.demo.DemoService" />
</beans>
2.加载Spring配置，并调用远程服务：
Consumer.java
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.apache.dubbo.demo.DemoService;
public class Consumer {
public static void main(String[] args) throws Exception {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"spring/dubbo-consumer.xml"});
context.start();
DemoService demoService = (DemoService)context.getBean("demoService"); // 获取远程服务代理
String hello = demoService.sayHello("world"); // 执行远程方法
System.out.println( hello ); // 显示调用结果
}
}
或者使用springBoot启动
import org.apache.dubbo.common.logger.Logger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ImportResource;
@SpringBootApplication
@ImportResource("spring/dubbo-consumer.xml")
public class DubboConsumerApplicaiton {
public static final Logger logger = LoggerFactory.getLogger(DubboConsumerApplicaiton.class);
public static void main(String[] args) {
SpringApplication.run(DubboConsumerApplicaiton.class, args);
}
}
并添加对应的restful接口提供接口访问
@RequestMapping("/demo")
public ModelAndView testDemo() {
ModelAndView modelAndView = new ModelAndView("index");
org.apache.dubbo.rpc.RpcContext.getContext().setAttachment(Constants.TAG_KEY, "gray");
modelAndView.addObject("result", demoService.sayHello("Dubbo Meetup"));
return modelAndView;
}
修改对应index页面
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Vertical centering in valid CSS</title>
<style type="text/css">
.text{text-align:center; }
</style>
</head>
<body>
<div class="text" style="margin-top:300px;font-size: 50px;">${result.msg}</div>
<div class="text" style="margin-top:30px;font-size: 35px;color:#5079bb;">From : ${result.userName}</div>
</body>
</html>
3.dubbo管理页面：
启动后访问 http://localhost:8080/dubbo-admin/
输入账号密码root/root
应用页面：
提供者页面:
消费者页面：
服务页面：
测试是否成功，只要看状态是否正常，就ok了 ....
provider-log:
2019-07-04 11:37:49,326 [DubboServerHandler-192.168.0.46:20880-thread-2] INFO org.apache.dubbo.demo.impl.DemoServiceImpl (DemoServiceImpl.java:31) - [DUBBO] [11:37:49] Hello Alterem., request from consumer: /192.168.0.46:52031, dubbo version: 2.7.0, current host: 192.168.0.46
5.使用Dubbo可能遇到的问题
1、org.springframework.beans.factory.BeanCreationException
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mgmtFactoryInoutDetailsController': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'goodsInoutServiceImpl' available
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:321) ~[spring-context-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1268) ~[spring-beans-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) ~[spring-beans-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:312) ~[spring-beans-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:308) ~[spring-beans-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.web.method.HandlerMethod.createWithResolvedBean(HandlerMethod.java:299) ~[spring-web-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.getHandlerInternal(AbstractHandlerMethodMapping.java:323) ~[spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.getHandlerInternal(AbstractHandlerMethodMapping.java:61) ~[spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.servlet.handler.AbstractHandlerMapping.getHandler(AbstractHandlerMapping.java:352) ~[spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.getHandler(DispatcherServlet.java:1160) [spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:940) [spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) [spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) [spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) [spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) [servlet-api.jar:na]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) [spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) [servlet-api.jar:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) [catalina.jar:8.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.36]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-websocket.jar:8.0.36]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [catalina.jar:8.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.36]
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61) [shiro-web-1.2.4.jar:1.2.4]
at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) [shiro-web-1.2.4.jar:1.2.4]
at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) [shiro-web-1.2.4.jar:1.2.4]
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.2.4.jar:1.2.4]
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66) [shiro-web-1.2.4.jar:1.2.4]
at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449) [shiro-web-1.2.4.jar:1.2.4]
at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365) [shiro-web-1.2.4.jar:1.2.4]
at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90) [shiro-core-1.2.4.jar:1.2.4]
at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83) [shiro-core-1.2.4.jar:1.2.4]
at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383) [shiro-core-1.2.4.jar:1.2.4]
at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362) [shiro-web-1.2.4.jar:1.2.4]
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.2.4.jar:1.2.4]
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:347) [spring-web-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:263) [spring-web-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [catalina.jar:8.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.36]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) [spring-web-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [catalina.jar:8.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.36]
at ue.common.filter.MultiPrefixHideUrlFilter.doFilter(MultiPrefixHideUrlFilter.java:76) [YKXCommon-3.3.01.jar:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [catalina.jar:8.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.36]
at ue.common.filter.PageableFilter.doFilterInternal(PageableFilter.java:48) [YKXCommon-3.3.01.jar:na]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [catalina.jar:8.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.36]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) [catalina.jar:8.0.36]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) [catalina.jar:8.0.36]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) [catalina.jar:8.0.36]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) [catalina.jar:8.0.36]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [catalina.jar:8.0.36]
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) [catalina.jar:8.0.36]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) [catalina.jar:8.0.36]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528) [catalina.jar:8.0.36]
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099) [tomcat-coyote.jar:8.0.36]
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:670) [tomcat-coyote.jar:8.0.36]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520) [tomcat-coyote.jar:8.0.36]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476) [tomcat-coyote.jar:8.0.36]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_131]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_131]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-util.jar:8.0.36]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'goodsInoutServiceImpl' available
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:687) ~[spring-beans-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1213) ~[spring-beans-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:284) ~[spring-beans-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:275) ~[spring-beans-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.autowireResource(CommonAnnotationBeanPostProcessor.java:522) ~[spring-context-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.getResource(CommonAnnotationBeanPostProcessor.java:496) ~[spring-context-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor$ResourceElement.getResourceToInject(CommonAnnotationBeanPostProcessor.java:627) ~[spring-context-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata$InjectedElement.inject(InjectionMetadata.java:169) ~[spring-beans-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.3.16.RELEASE.jar:4.3.16.RELEASE]
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:318) ~[spring-context-4.3.16.RELEASE.jar:4.3.16.RELEASE]
... 67 common frames omitted
原因分析：
Error creating bean with name 'mgmtFactoryInoutDetailsController': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'goodsInoutServiceImpl' available
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:321)
解决方案
在dubbo-provider.xml添加对应的声明暴露服务
<dubbo:service interface="ue.biz.service.biz.GoodsInoutService" ref="goodsInoutServiceImpl"/>
在dubbo-consumer.xml添加对应的服务订阅
<dubbo:reference id="goodsInoutServiceImpl" interface="ue.biz.service.biz.GoodsInoutService"/>
2、org.apache.dubbo.rpc.RpcException
org.apache.dubbo.rpc.RpcException: No provider available from registry 120.79.246.86:2181 for service ue.biz.service.bas.EnterpriseUserService on consumer 192.168.0.63 use dubbo version 2.7.0, please check status of providers(disabled, not registered or in blacklist).
at org.apache.dubbo.registry.integration.RegistryDirectory.doList(RegistryDirectory.java:522) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.rpc.cluster.directory.AbstractDirectory.list(AbstractDirectory.java:82) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.list(AbstractClusterInvoker.java:274) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invoke(AbstractClusterInvoker.java:238) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.rpc.cluster.support.wrapper.MockClusterInvoker.invoke(MockClusterInvoker.java:75) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.rpc.proxy.InvokerInvocationHandler.invoke(InvokerInvocationHandler.java:57) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.common.bytecode.proxy7.getCurrent(proxy7.java) ~[dubbo-2.7.0.jar:2.7.0]
at ue.mgmt.controller.CommonController.main(CommonController.java:787) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_131]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_131]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_131]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_131]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) ~[spring-web-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) ~[spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:849) ~[spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:760) ~[spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) [spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) [spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) [spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) [spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) [servlet-api.jar:na]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) [spring-webmvc-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) [servlet-api.jar:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) [catalina.jar:8.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.36]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-websocket.jar:8.0.36]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [catalina.jar:8.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.36]
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61) [shiro-web-1.2.4.jar:1.2.4]
at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) [shiro-web-1.2.4.jar:1.2.4]
at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) [shiro-web-1.2.4.jar:1.2.4]
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.2.4.jar:1.2.4]
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66) [shiro-web-1.2.4.jar:1.2.4]
at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449) [shiro-web-1.2.4.jar:1.2.4]
at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365) [shiro-web-1.2.4.jar:1.2.4]
at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90) [shiro-core-1.2.4.jar:1.2.4]
at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83) [shiro-core-1.2.4.jar:1.2.4]
at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383) [shiro-core-1.2.4.jar:1.2.4]
at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362) [shiro-web-1.2.4.jar:1.2.4]
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.2.4.jar:1.2.4]
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:347) [spring-web-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:263) [spring-web-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [catalina.jar:8.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.36]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) [spring-web-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [catalina.jar:8.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.36]
at ue.common.filter.MultiPrefixHideUrlFilter.doFilter(MultiPrefixHideUrlFilter.java:76) [YKXCommon-3.3.01.jar:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [catalina.jar:8.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.36]
at ue.common.filter.PageableFilter.doFilterInternal(PageableFilter.java:48) [YKXCommon-3.3.01.jar:na]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.20.RELEASE.jar:4.3.20.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [catalina.jar:8.0.36]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.36]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) [catalina.jar:8.0.36]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) [catalina.jar:8.0.36]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) [catalina.jar:8.0.36]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) [catalina.jar:8.0.36]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [catalina.jar:8.0.36]
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) [catalina.jar:8.0.36]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) [catalina.jar:8.0.36]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528) [catalina.jar:8.0.36]
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099) [tomcat-coyote.jar:8.0.36]
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:670) [tomcat-coyote.jar:8.0.36]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520) [tomcat-coyote.jar:8.0.36]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476) [tomcat-coyote.jar:8.0.36]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_131]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_131]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-util.jar:8.0.36]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]
原因分析
No provider available from registry 120.79.246.86:2181 for service ue.biz.service.bas.EnterpriseUserService on consumer 192.168.0.63 use dubbo version 2.7.0, please check status of providers
解决方案
可能是因为providers没有启动，或者是provider对应暴露的服务被禁用，启动providers或者解除禁用即可
3、java.lang.IllegalStateException
java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [io.netty.channel.nio.NioEventLoop]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1352)
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1340)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1205)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1166)
at ch.qos.logback.classic.spi.PackagingDataCalculator.loadClass(PackagingDataCalculator.java:207)
at ch.qos.logback.classic.spi.PackagingDataCalculator.bestEffortLoadClass(PackagingDataCalculator.java:226)
at ch.qos.logback.classic.spi.PackagingDataCalculator.computeBySTEP(PackagingDataCalculator.java:138)
at ch.qos.logback.classic.spi.PackagingDataCalculator.populateUncommonFrames(PackagingDataCalculator.java:113)
at ch.qos.logback.classic.spi.PackagingDataCalculator.populateFrames(PackagingDataCalculator.java:105)
at ch.qos.logback.classic.spi.PackagingDataCalculator.calculate(PackagingDataCalculator.java:57)
at ch.qos.logback.classic.spi.ThrowableProxy.calculatePackagingData(ThrowableProxy.java:147)
at ch.qos.logback.classic.spi.LoggingEvent.<init>(LoggingEvent.java:124)
at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:440)
at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:396)
at ch.qos.logback.classic.Logger.warn(Logger.java:713)
at io.netty.util.internal.logging.Slf4JLogger.warn(Slf4JLogger.java:151)
at io.netty.channel.nio.NioEventLoop.handleLoopException(NioEventLoop.java:486)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:469)
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run(Thread.java:748)
原因分析
this web application instance has been stopped already.
所以，需要重启Tomcat的情况下才有可能发上，这是第一个出错条件。
Could not load [io.netty.channel.nio.NioEventLoop].
看这个不能直接推出问题产生条件，但是很明显是关于加载的。
解决方案
总结以上两点，通俗点讲，就是重启了工程（可能是因为直接修改代码，工程reload了）， 并且，连过了数据库（登录等），才出现了上述报错信息。
原因是因为在tomcat重启的时候，之前的tomcat的线程还没有完全关闭，最新启动tomcat就会报这个异常。
4、org.apache.dubbo.remoting.TimeoutException
Caused by: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2019-07-04 15:05:41.363, end time: 2019-07-04 15:05:51.388, client elapsed: 94 ms, server elapsed: 9931 ms, timeout: 10000 ms, request: Request [id=0, version=2.0.2, twoway=true, event=false, broken=false, data=RpcInvocation [methodName=find, parameterTypes=[class ue.biz.entity.sys.Permission$Type], arguments=[url], attachments={path=ue.biz.service.sys.PermissionService, interface=ue.biz.service.sys.PermissionService, version=0.0.0, timeout=10000}]], channel: /192.168.0.46:54424 -> /192.168.0.46:20880
at org.apache.dubbo.remoting.exchange.support.DefaultFuture.returnFromResponse(DefaultFuture.java:296) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.remoting.exchange.support.DefaultFuture.get(DefaultFuture.java:191) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.remoting.exchange.support.DefaultFuture.get(DefaultFuture.java:164) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.rpc.protocol.dubbo.DubboInvoker.doInvoke(DubboInvoker.java:108) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.rpc.protocol.AbstractInvoker.invoke(AbstractInvoker.java:156) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:88) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:73) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.rpc.protocol.dubbo.filter.FutureFilter.invoke(FutureFilter.java:49) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:73) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.rpc.filter.ConsumerContextFilter.invoke(ConsumerContextFilter.java:54) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:73) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.rpc.listener.ListenerInvokerWrapper.invoke(ListenerInvokerWrapper.java:77) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:56) ~[dubbo-2.7.0.jar:2.7.0]
at org.apache.dubbo.rpc.cluster.support.FailoverClusterInvoker.doInvoke(FailoverClusterInvoker.java:80) ~[dubbo-2.7.0.jar:2.7.0]
... 65 common frames omitted
原因分析
org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2019-07-04 15:05:41.363, end time: 2019-07-04 15:05:51.388, client elapsed: 94 ms, server elapsed: 9931 ms, timeout: 10000 ms, request: Request [id=0, version=2.0.2, twoway=true, event=false, broken=false, data=RpcInvocation [methodName=find, parameterTypes=[class ue.biz.entity.sys.Permission$Type], arguments=[url], attachments={path=ue.biz.service.sys.PermissionService
解决方案
在dubbo-provider.xml增加超时时间
<dubbo:provider delay="-1" timeout="10000" retries="0"/>
从零开始认识Dubbo的更多相关文章
- 【原】从零开始改造淘淘商城（引入dubbo解决项目耦合）02
前言: 关于为什么要引入dubbo框架,而不是用spring cloud或者是motan呢,主要是笔者现在公司用的就是dubbo,并且第一次接触到微服务的概念是来源于dubbo,再加上最近dubbo频 ...
- 0.从零开始搭建spring mvc + mybatis + memcached+ dubbo\zookper的maven项目
1.首先创建maven 项目,配置相关pom信息 2.配置spring mvc 4, 测试,提交代码 3.引入配置mybatis3,测试,提交代码 4.配置事务,测试,提交代码 5.配置memcach ...
- 从零开始手写 dubbo rpc 框架
rpc rpc 是基于 netty 实现的 java rpc 框架,类似于 dubbo. 主要用于个人学习,由渐入深,理解 rpc 的底层实现原理. 前言 工作至今,接触 rpc 框架已经有很长时间. ...
- 如何从零开始实现一个soa远程调用服务基础组件
说起soa远程调用基础组件,最著名的莫过于淘宝的dubbo了,目前很多的大型互联网公司都有一套自己的远程服务调用分布式框架,或者是使用开源的(例如dubbo),或者是自己基于某种协议(例如hessia ...
- Spring Boot 2.x 基础案例：整合Dubbo 2.7.3+Nacos1.1.3（配置中心）
本文原创首发于公众号:Java技术干货 1.概述 本文将Nacos作为配置中心,实现配置外部化,动态更新.这样做的优点:不需要重启应用,便可以动态更新应用里的配置信息.在如今流行的微服务应用下,将应用 ...
- dubbo入门和springboot集成dubbo小例子
从零开始搭建springboot-dubbo的例子 Dubbo 是一个分布式服务框架,致力于提供高性能和透明化的 RPC 远程服务调用方案,以及 SOA 服务治理方案 一. Dubbo的简单介绍 1. ...
- 高效开发 Dubbo？用 Spring Boot 可得劲！
不仅简化了 Dubbo 基于 xml 配置的方式,也提高了日常开发效率,甚至提升了工作幸福感. 为了节省亲爱的读者您的时间,请根据以下2点提示来阅读本文,以提高您的阅读收获效率哦. 如果您只有简单的 ...
- springboot整合dubbo+zookeeper最新详细
引入 最近和小伙伴做一个比赛,处于开发阶段,因为涉及的服务比较多,且服务需要分开部署在不同的服务器上,讨论之后,打算采用分布式来做,之前学习springboot的时候,部分章节涉及到了springbo ...
- 阿里P7终于讲完了JDK+Spring+mybatis+Dubbo+SpringMvc+Netty源码
前言 这里普及一下,每个公司都有职别定级系统,阿里也是,技术岗以 P 定级,一般校招 P5, 社招 P6 起.其实阅读源码也是有很多诀窍的,这里分享几点心得: 首先要会用.你要知道这个库是干什么的,掌 ...
随机推荐
- Wpf ImageSource对象与Bitmap对象的互相转换
原文:Wpf ImageSource对象与Bitmap对象的互相转换 Bitmap to ImageSource 将得到的Bitmap对象转换为wpf常用的Imagesource对象 BitmapSo ...
- 解决iconv函数无法转换某些中文的问题
原文: 解决iconv函数无法转换某些中文的问题 请先看以下代码,这个页面是GB2312编码的: $str = '陶喆';echo 'gb2312-'.$str;echo '<br />' ...
- 核心思想：许多公司都没有认识到云储存的革命性（类似QQ把它搞成了用户的家、再也离不开了）
在云储存刚刚兴起的时候,也就是dropbox刚刚进入大家视野的时候.许多人都是简单的认为这只是一个提供在线存储的服务而已,许多公司都没有认识到云储存的革命性. 对于这些大公司贸然进入一些新的领域是需要 ...
- tbox的项目：vm86（汇编语言虚拟机），tbox（类似dlib），gbox（c语言实现的多平台图形库）
https://github.com/tboox/tbox GBOX是一个用c语言实现的多平台图形库,支持windows.linux.mac.ios.android以及其他嵌入式系统. 现在这个项目, ...
- Linux iostat
转自 http://www.cnblogs.com/ggjucheng/archive/2013/01/13/2858810.html Linux IO实时监控iostat命令详解 简介 iostat ...
- 获取函数的地址（三种方法，分别是@，Addr，MethodAddress）
问题来源: http://www.cnblogs.com/del/archive/2008/07/30/1039045.html#1272783 在编译器看来, 重载函数根本就是完全不同的几个函数, ...
- 【操作系统】关于Linux桌面操作系统
以前是Win+Ubuntu+黑苹果,周末想体验一下deepin,于是简单安装了一下,安装过程很简单,这里不再描述.安装之后,第一次打开系统,确实很惊艳,赏心悦目的操作系统. 之前用Ubuntu时候,C ...
- kafka笔记4(2)
提交和偏移量 每次调用poll 方法,总是返回生产者写入Kafka但还没有被消费者读取过的记录我们因此可以追踪到哪些记录时被群组里的哪个消费者读取过的. 我们把更新分区当前位置的操作叫做提交. 那么消 ...
- Linux上vim的使用
.........以下是我在使用vim时的操作经验........... (首先要了解vim主要是命令模式,输入模式,可视化模式,主要区别就是在不同模式下可以完成不同的操作,只是个编辑器,没有必要太纠 ...
- JCS学习记录 --Java Caching System
Java Caching System--JCS 缓存工具 //jcs版本 jcs-1.3.jar //jcs--cache.ccf缓存配置文件 cache.ccf //所依赖的jar包concurr ...