RMI服务接口
提供服务的RMI服务接口必须实现Remote接口
import java.rmi.Remote;
import java.rmi.RemoteException;
import com.google.protobuf.GeneratedMessageLite;
import com.yaowan.h5qipai.protobuf.message.code.Poker.RMIParam;
/**
* RMI服务
* @author
*
* @param <T>
*/
public interface RMIService extends Remote{
public Entity<? extends GeneratedMessageLite> dispatch(Entity<RMIParam> paramEntity )throws RemoteException;
}
RMI服务启动
RMI服务端口
RMI需要两个端口：
- 服务开启端口
Registry registry = LocateRegistry.createRegistry(port);
port端口，用来开启RMI服务，RMI终端连接需要制定连接此端口
String URL = "rmi://"+host+":"+port+"/rmiservice";
rmiService = (RMIService)Naming.lookup(URL);
- 服务交互端口
RMI终端在与RMI服务端建立连接后会需要利用此端口来进行交互， 而此端口在RMI服务器启动后是随机生成的，这样在防火墙穿透时就不好处理， 因为随机防火墙都不知道对外开放哪个端口了，故在生产环境下是需要制定此端口的，这样我们就需要实现RMISocketFactory类，来指定此端口
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.rmi.server.RMISocketFactory;
import com.yaowan.framework.util.LogUtil;
public class RMILocalSocketFactory extends RMISocketFactory {
private int dataPort;
public RMILocalSocketFactory(int dataPort){
this.dataPort = dataPort;
}
@Override
public ServerSocket createServerSocket(int port) throws IOException {
if(port == 0){
port = dataPort;
LogUtil.info("RMIDataPort: "+port);
}
LogUtil.info("RMI createServerSocket: "+port);
return new ServerSocket(port);
}
@Override
public Socket createSocket(String host, int port) throws IOException {
String key = host+":"+port;
LogUtil.info("RMI createSocket: "+key);
return new Socket(host, port);
}
}
RMI服务启动
import java.net.MalformedURLException;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.RMISocketFactory;
import java.rmi.server.UnicastRemoteObject;
import org.apache.commons.lang3.exception.ExceptionUtils;
import com.yaowan.framework.core.GlobalConfig;
import com.yaowan.framework.util.LogUtil;
/**
* RMI服务端启动器
* @author
*
*/
public class RMIServiceServer {
String host;
private int port;
private String URL;
//RMI服务抽象也必须静态化
private static RMIService rmiService;
//RMI服务的实现类必须静态化
private static RMIService rmiServiceImpl;
public RMIServiceServer(int port) {
this.port = port;
this.host = GlobalConfig.getString("IntranetIP");
URL = "rmi://"+host+":"+port+"/dispatche";
}
/**
* 用于启动RMI服务
*/
public void start() {
try {
// System.setProperty("java.rmi.server.hostname", host);
int dataPort = GlobalConfig.getInt("RMIDataPort");
if(dataPort == 0){//如果未设置，默认用此端口
dataPort = 19998;
}
RMISocketFactory.setSocketFactory(new RMILocalSocketFactory(dataPort));
//RMI服务的实现类必须静态化
rmiServiceImpl = new RMIServiceImpl();
//RMI服务抽象也必须静态化
rmiService=(RMIService)UnicastRemoteObject.exportObject(rmiServiceImpl,0); //固定端口设置,配合在RMISocketFactory实现中做处理
System.setProperty("java.rmi.server.hostname",host);
LogUtil.info("Binding server implementation to registry");
Registry registry = LocateRegistry.createRegistry(port);
registry.rebind("dispatche", rmiService);
// Naming.rebind(URL, rmiService);
LogUtil.info("Waiting for invocations from clients ...");
LogUtil.info("URL: "+URL);
} catch (RemoteException e) {
LogUtil.error(ExceptionUtils.getStackFrames(e));
} catch (MalformedURLException e) {
LogUtil.error(ExceptionUtils.getStackFrames(e));
}catch(Exception e){
LogUtil.error(ExceptionUtils.getStackFrames(e));
}
}
}
需要注意点:
- RMI服务抽象也必须静态化
- RMI服务的实现类必须静态化
