RMI服務接口
提供服務的RMI服務接口必須實現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服務
* @author
*
* @param <T>
*/
public interface RMIService extends Remote{
public Entity<? extends GeneratedMessageLite> dispatch(Entity<RMIParam> paramEntity )throws RemoteException;
}
RMI服務啟動
RMI服務端口
RMI需要兩個端口：
- 服務開啟端口
Registry registry = LocateRegistry.createRegistry(port);
port端口业岁，用來開啟RMI服務，RMI終端連接需要制定連接此端口
String URL = "rmi://"+host+":"+port+"/rmiservice";
rmiService = (RMIService)Naming.lookup(URL);
- 服務交互端口
RMI終端在與RMI服務端建立連接后會需要利用此端口來進行交互邮偎， 而此端口在RMI服務器啟動后是隨機生成的肌似，這樣在防火墻穿透時就不好處理， 因為隨機防火墻都不知道對外開放哪個端口了垮兑，故在生產環(huán)境下是需要制定此端口的冷尉，這樣我們就需要實現RMISocketFactory類，來指定此端口
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服務啟動
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服務端啟動器
* @author
*
*/
public class RMIServiceServer {
String host;
private int port;
private String URL;
//RMI服務抽象也必須靜態(tài)化
private static RMIService rmiService;
//RMI服務的實現類必須靜態(tài)化
private static RMIService rmiServiceImpl;
public RMIServiceServer(int port) {
this.port = port;
this.host = GlobalConfig.getString("IntranetIP");
URL = "rmi://"+host+":"+port+"/dispatche";
}
/**
* 用于啟動RMI服務
*/
public void start() {
try {
// System.setProperty("java.rmi.server.hostname", host);
int dataPort = GlobalConfig.getInt("RMIDataPort");
if(dataPort == 0){//如果未設置系枪，默認用此端口
dataPort = 19998;
}
RMISocketFactory.setSocketFactory(new RMILocalSocketFactory(dataPort));
//RMI服務的實現類必須靜態(tài)化
rmiServiceImpl = new RMIServiceImpl();
//RMI服務抽象也必須靜態(tài)化
rmiService=(RMIService)UnicastRemoteObject.exportObject(rmiServiceImpl,0); //固定端口設置,配合在RMISocketFactory實現中做處理
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));
}
}
}
需要注意點:
- RMI服務抽象也必須靜態(tài)化
- RMI服務的實現類必須靜態(tài)化
