TUSCANY SCA JAVA (四) 引用RMI服务
在 TUSCANY SCA JAVA (三) 中是将计算器作为一个RMI服务进行绑定，对外提供进行访问的，还有一种情况是如果所需要的功能在外界已经做好了，并以RMI开放供外界访问，那么tuscany如何引用呢？有这么一个例子，如果计算器的功能在外界已经实现好了，并以RMI开放供外界访问，来看看怎么进行引用。
来看下图：
从图中可以看出计算器组件 引用是指向了RMI服务端，并且提升为计算器组合构件的引用。
下面来说主要实现代码：
供外加访问的RMI服务端代码：
关于java怎么注册RMI服务，google一下就知道了
ICalculatorRMI.java 添加@Remotable说明可以进行远程访问
package com.ajun.tuscany.rmiserver; import java.rmi.Remote; import java.rmi.RemoteException; import org.osoa.sca.annotations.Remotable; /** * 计算器远程RMI接口 * @author ajun * @e-mail [email protected] * @blog http://blog.csdn.net/ajun_studio * @version 创建时间：2012-7-25 下午9:25:52 */ @Remotable public interface ICalculatorRMI extends Remote{ /** * 加法 * @param n1 * @param n2 * @return */ double add(double n1,double n2) throws RemoteException; /** * 减法 * @param n1 * @param n2 * @return */ double subtract(double n1,double n2) throws RemoteException; /** * 除法 * @param n1 * @param n2 * @return */ double divide(double n1,double n2) throws RemoteException; /** * 乘法 * @param n1 * @param n2 * @return */ double multiply(double n1,double n2) throws RemoteException; }
CalculatorRMI.java实现类
package com.ajun.tuscany.rmiserver; import java.rmi.RemoteException; import java.rmi.server.UnicastRemoteObject; /** * 计算器RMI服务类 * @author ajun * @e-mail [email protected] * @blog http://blog.csdn.net/ajun_studio * @version 创建时间：2012-7-25 下午9:26:19 */ public class CalculatorRMI extends UnicastRemoteObject implements ICalculatorRMI { private static final long serialVersionUID = -6698638302125311021L; protected CalculatorRMI() throws RemoteException { super(); } @Override public double add(double n1, double n2) throws RemoteException { return n1+n2; } @Override public double subtract(double n1, double n2) throws RemoteException { return n1-n2; } @Override public double divide(double n1, double n2) throws RemoteException { return n1*n2; } @Override public double multiply(double n1, double n2) throws RemoteException { return n1/n2; } /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub } }
注册RMI服务
CalculatorRMIServer.java
package com.ajun.tuscany.rmiserver; import java.rmi.AlreadyBoundException; import java.rmi.RemoteException; import java.rmi.registry.LocateRegistry; import java.rmi.registry.Registry; /** * 注册RMI服务类 * @author ajun * @e-mail [email protected] * @blog http://blog.csdn.net/ajun_studio * @version 创建时间：2012-7-25 下午9:29:47 */ public class CalculatorRMIServer { /** * @param args * @throws RemoteException * @throws AlreadyBoundException */ public static void main(String[] args) throws RemoteException, AlreadyBoundException { CalculatorRMI rmi = new CalculatorRMI(); //端口号8099 Registry rmiRegistry = LocateRegistry.createRegistry(8099); //为rmi绑定的服务的名字为CalculatorRMIService rmiRegistry.bind("CalculatorRMIService", rmi); } }
tuscany这边共有6个java类，其中四个接口分别代表加减乘除，其余两个为计算器类和计算器接口
加法：IAdd.java
package com.ajun.tuscany.server; /** * 加法接口 * @author ajun * @e-mail [email protected] * @blog http://blog.csdn.net/ajun_studio * @version 创建时间：2012-7-19 下午9:47:25 */ public interface IAdd { double add(double n1,double n2); }
减法：ISubtract.java
package com.ajun.tuscany.server; /** * 减法接口 * @author ajun * @e-mail [email protected] * @blog http://blog.csdn.net/ajun_studio * @version 创建时间：2012-7-19 下午9:52:00 */ public interface ISubtract { double subtract(double n1,double n2); }
乘法：IMultiply.java
package com.ajun.tuscany.server; /** * 乘法接口 * @author ajun * @e-mail [email protected] * @blog http://blog.csdn.net/ajun_studio * @version 创建时间：2012-7-19 下午9:50:47 */ public interface IMultiply { double multiply(double n1,double n2); }
除法：IDivide.java
package com.ajun.tuscany.server; /** * 除法接口 * @author ajun * @e-mail [email protected] * @blog http://blog.csdn.net/ajun_studio * @version 创建时间：2012-7-19 下午9:48:53 */ public interface IDivide { double divide(double n1,double n2); }
计算器接口：ICalculator.java
package com.ajun.tuscany.server; /** * 计算机接口 * @author ajun * @e-mail [email protected] * @blog http://blog.csdn.net/ajun_studio * @version 创建时间：2012-7-19 下午10:02:20 */ public interface ICalculator { /** * 加法 * @param n1 * @param n2 * @return */ double add(double n1,double n2); /** * 减法 * @param n1 * @param n2 * @return */ double subtract(double n1,double n2); /** * 除法 * @param n1 * @param n2 * @return */ double divide(double n1,double n2); /** * 乘法 * @param n1 * @param n2 * @return */ double multiply(double n1,double n2); }
计算器实现类：Calculator.java
package com.ajun.tuscany.server;
import org.osoa.sca.annotations.Reference;
public class Calculator implements ICalculator{
/**
* 引用其他组件IAdd，ISubtract，IMultiply,IDivide
* @Reference 说明引用其他组件 会和.composite文件进行配置
*/
private IAdd add;//加法组件
private ISubtract subtract;//减法组件
private IMultiply multiply;//乘法组件
private IDivide divide;//除法组件
public IAdd getAdd() {
return add;
}
@Reference
public void setAdd(IAdd add) {
this.add = add;
}
public ISubtract getSubtract() {
return subtract;
}
@Reference
public void setSubtract(ISubtract subtract) {
this.subtract = subtract;
}
public IMultiply getMultiply() {
return multiply;
}
@Reference
public void setMultiply(IMultiply multiply) {
this.multiply = multiply;
}
public IDivide getDivide() {
return divide;
}
@Reference
public void setDivide(IDivide divide) {
this.divide = divide;
}
@Override
public double add(double n1, double n2) {
System.out.println("Server add");
return this.add.add(n1, n2);
}
@Override
public double subtract(double n1, double n2) {
System.out.println("Server subtract");
return this.subtract.subtract(n1, n2);
}
@Override
public double divide(double n1, double n2) {
System.out.println("Server divide");
return this.divide.divide(n1, n2);
}
@Override
public double multiply(double n1, double n2) {
System.out.println("Server multiply");
return this.multiply.multiply(n1, n2);
}
}
客户端调用代码：CalculatorServerClient.java
package com.ajun.tuscany.client; import org.apache.tuscany.sca.host.embedded.SCADomain; import com.ajun.tuscany.server.Calculator; import com.ajun.tuscany.server.ICalculator; /** * 服务端 * @author ajun * @e-mail [email protected] * @blog http://blog.csdn.net/ajun_studio * @version 创建时间：2012-7-19 下午11:12:44 */ public class CalculatorServerClient { public static void main(String [] args){ SCADomain domain = SCADomain.newInstance("com/ajun/tuscany/server/Calculator.composite"); ICalculator c = domain.getService(Calculator.class, "CalculatorServiceComponent"); System.out.println("3 + 2 = "+c.add(3, 2)); System.out.println("3 - 2 = "+c.subtract(3, 2)); System.out.println("3 * 2 = "+c.multiply(3, 2)); System.out.println("3 / 2 = "+c.divide(3, 2)); } }
测试：
运行CalculatorRMIServer.java
最后运行CalculatorServerClient.java
输出：
2012-7-25 21:39:49 org.apache.tuscany.sca.node.impl.NodeImpl <init> 信息: Creating node: com/ajun/tuscany/server/Calculator.composite 2012-7-25 21:39:51 org.apache.tuscany.sca.node.impl.NodeImpl configureNode 信息: Loading contribution: file:/E:/springdm/Calculator_rmi_ref/bin/ 2012-7-25 21:39:52 org.apache.tuscany.sca.node.impl.NodeImpl start 信息: Starting node: com/ajun/tuscany/server/Calculator.composite Server add 3 + 2 = 5.0 Server subtract 3 - 2 = 1.0 Server multiply 3 * 2 = 1.5 Server divide 3 / 2 = 6.0