RMI服务实现直接使用jar启动项目的shell

参考：https://www.jianshu.com/p/4a9b7680b47b

参考：https://www.cnblogs.com/gzyy1987/p/4703478.html

定义一个注解类，方便使用注解的方式自动注入服务类。

@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Component
public @interface RemoteService {
	String value() default "" ;
}

定义数据交互的端口直接在构造函数中传入端口就可以了。这样方式最为简单。@RemoteService为自定义的注解值，方便使用注解的方式定义服务。注意实现类要继承自UnicastRemoteObject类。可以设置一个类继承自UnicastRemoteObject类，并在这个类中实现数据端口的定义【super(10087)】。

@Service
@RemoteService
public class CityServiceImple extends UnicastRemoteObject implements CityService {
	private static final long serialVersionUID = 1L;
	@Autowired
	private CityDao cityDao;
	@Autowired
	private DataSourceHelper dataSourceHelper;
	@Autowired
	private DataInfoService dataInfoService;
	public CityServiceImple() throws Exception {
        super(10087);
       
    }
	@Override
	public City selectByPrimaryKey(Integer companyid,Long cityid) throws RemoteException {
		String key = dataInfoService.getDataSourceKey(companyid, DataSourceEnum.Comm.name(), OperationType.Read);
		DynamicDataSource.setDataSourceKey(dataSourceHelper.getDataSourceKey(key));
		return cityDao.selectByPrimaryKey(cityid);
	}

	@Override
	public List<City> getAll(Integer companyid) throws RemoteException {
		String key = dataInfoService.getDataSourceKey(companyid, DataSourceEnum.Comm.name(), OperationType.Read);
		DynamicDataSource.setDataSourceKey(dataSourceHelper.getDataSourceKey(key));
		return cityDao.getAll();
	}

}

注意服务类要实现 继承Remote。

public interface CityService extends Remote{
    City selectByPrimaryKey(Integer companyid,Long cityid) throws java.rmi.RemoteException;
    List<City> getAll(Integer companyid) throws java.rmi.RemoteException;
}

下面是启动服务的源码

public static void main(String[] args) {		
		logger.debug("RMI服务端启动......");
		System.out.println("RMI服务端启动");
		try {
			 ctx = new ClassPathXmlApplicationContext("applicationContext.xml");

			int port = Integer.parseInt(PropertyUtils.getValue("rmi.port"));
			Registry registry = LocateRegistry.createRegistry(port);
			
			String rmiIP=PropertyUtils.getValue("rmi.ip");
			System.setProperty("java.rmi.server.hostname",rmiIP);
			// 在端口上创建一个远程对象注册表
			/*try{
				registry = LocateRegistry.getRegistry(port);
			}catch(RemoteException e){
				System.out.println("RMI服务不存在");
				registry = LocateRegistry.createRegistry(port);
				logger.debug("RMI服务不存在");
			}*/
			Map<String, Object> beans = ctx.getBeansWithAnnotation(RemoteService.class);
			
			for (Entry<String, Object> item : beans.entrySet()) {
				String name = 
						(AopUtils.getTargetClass(item.getValue()).getInterfaces()[0]).getName();
				String bindstr = String.format("rmi://%s:%d/%s", rmiIP,port, name);
				System.out.println(bindstr);
				//registry.rebind(bindstr, (Remote) item.getValue());
				Naming.bind(bindstr, (Remote) item.getValue());
			}
			System.out.println("RMI服务端启动完成");
			Scanner sc = new Scanner(System.in);
			while (true) {
				String o = sc.nextLine();
				if (o.equals("shutdown")) {
					UnicastRemoteObject.unexportObject(registry, true);
					System.out.println("RMI服务关闭");
					break;
				}
				if (o.equals("start")) {
					registry = BindRMI(port, ctx);
				}
			}
			sc.close();
		} catch (Exception e) {
			e.printStackTrace();
			logger.error(e.getMessage());
		}

	}

下面是直接启动jar文件的shell

#!/bin/bash
#description: 启动重启server服务 
#端口号，根据此端口号确定PID 
#******************************************需要配置*************************************************************************# 
PORT=10086
#启动命令所在目录  
#******************************************需要配置*************************************************************************#
HOME='/usr/local/src'  
  
#查询出监听了PORT端口TCP协议的程序  
pid=`netstat -anp|grep $PORT|awk '{printf $7}'|cut -d/ -f1`  
  
  
start(){  
   if [ -n "$pid" ]; then  
      echo "server already start,pid:$pid"  
      return 0
   fi
   #进入命令所在目录  
   #******************************************需要配置*************************************************************************#
   cd $HOME  
   nohup java -jar $HOME/RMIService.jar > /logs/rmiervice.log 2>&1 &   #启动聊天服务器 把日志输出到HOME目录的server.log文件中   
   echo "start at port:$PORT"  
}  
  
stop(){  
   if [ -z "$pid" ]; then  
      echo "not find program on port:$PORT"  
      return 0
   fi
   #结束程序，使用讯号2，如果不行可以尝试讯号9强制结束  
   kill -9 $pid
   rm -rf $pid
   echo "kill program use signal 2,pid:$pid"  
}  
status(){  
   if [ -z "$pid" ]; then  
      echo "not find program on port:$PORT"  
   else  
      echo "program is running,pid:$pid"  
   fi  
}  
  
case $1 in  
   start)  
      start  
   ;;  
   stop)  
      stop  
   ;;
   restart)  
      $0 stop
      sleep 2
      $0 start
    ;;
   status)  
      status  
   ;;  
   *)  
      echo "Usage: {start|stop|status}"  
   ;;  
esac  
  
exit 0

自启动使用supervisor就可以了。只需要在ini文件中配置command时增加 start参数即可。参考：https://mp.csdn.net/postedit/84630869

[program:rmiservice]
directory=/usr/local/src/
command=/usr/local/src/rmiservice.sh start run
environment=JAVA_HOME="/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-0.el7_5.x86_64",JAVA_BIN="/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-0.el7_5.x86_64/bin"
user=root
autostart=true
autorestart=true
stdout_logfile=/var/log/supervisor/%(program_name)s.log
stderr_logfile=/var/log/supervisor/%(program_name)s.log