| Calculator RMI Service Sample |
| ============================= |
| |
| This sample illustrates the use of Tuscany RMI Binding to expose component |
| services as Java RMI Services. It also demonstrates how a simple Java RMI |
| Client application invokes the SCA Application's services exposed as RMI |
| Services. |
| |
| The README in the samples directory (the directory above this) provides |
| general instructions about building and running samples. Take a look there |
| first. |
| |
| If you just want to run it to see what happens open a command prompt, navigate |
| to this sample directory and do: |
| |
| ant run |
| |
| OR if you don't have ant, on Windows do |
| |
| java -cp ..\..\lib\tuscany-sca-manifest.jar;target\sample-calculator-rmi-service.jar calculator.CalculatorServer |
| |
| and on *nix do |
| |
| java -cp ../../lib/tuscany-sca-manifest.jar:target/sample-calculator-rmi-service.jar calculator.CalculatorServer |
| |
| Now you have the server running you need to open another command prompt, navigate |
| to the calculator-rmi-reference sample directory and do: |
| |
| ant run |
| |
| OR if you don't have ant, on Windows do |
| |
| java -cp ..\..\lib\tuscany-sca-manifest.jar;target\sample-calculator-rmi-reference.jar calculator.CalculatorClient |
| |
| and on *nix do |
| |
| java -cp ../../lib/tuscany-sca-manifest.jar:target/sample-calculator-rmi-reference.jar calculator.CalculatorClient |
| |
| |
| Sample Overview |
| --------------- |
| This sample extends the calculator sample by replacing the local service |
| binding with an RMI binding. SO a java client can call the service exposed |
| by the SCA application using an RMI client. |
| |
| This sample adds a number of classes to the basic calculator sample: |
| |
| calculator-rmi-service/ |
| src/ |
| main/ |
| java/ |
| calculator/ |
| CalculatorService.java - as calculator sample |
| CalculatorServiceImpl.java |
| AddService.java - as calculator sample |
| AddServiceImpl.java |
| SubtractService.java - as calculator sample |
| SubtractServiceImpl.java |
| MultiplyService.java - as calculator sample |
| MultiplyServiceImpl.java |
| DivideService.java - as calculator sample |
| DivideServiceImpl.java |
| CalculatorClient.java - (Not currently used) Uses the |
| java naming service to |
| look up the Calculator RMI service. |
| It then calls add, subtract, multiple |
| and divide methods on the service |
| CalculatorServer.java - starts the SCA Runtime and deploys |
| the CalculatorRMIServer.composite. |
| In doing this the SCA RMI binding |
| acts to expose the CalculatorService |
| over RMI. |
| resources/ |
| CalculatorRMIServer.composite - the SCA assembly for this sample |
| test/ |
| java/ |
| calculator/ |
| CalculatorRMIServerTestCase.java - JUnit test case |
| calculator-rmi-service.png - a pictorial representation of the |
| .composite file |
| build.xml - the Ant build file for the server |
| pom.xml - the Maven build file |
| |
| Note. As this test creates and uses local network connections you may need to |
| configure your firewall, if you are running one, to allow the test to run |
| successfully. |
| |
| Building And Running The Sample Using Ant |
| ----------------------------------------- |
| With the binary distribution the sample can be built and run using Ant. Two |
| build files are used to support client and server functions. |
| |
| The server starts the SCA runtime and loads the SCA calculator application |
| which exposes an RMI service. Start a new console and use the following |
| commands. |
| |
| cd calculator-rmi-service |
| ant compile |
| ant run |
| |
| This will run up the server and display the following. |
| |
| run: |
| [java] Starting of the SCA Calculator Application exposed as RMI Services... |
| [java] ...Press Enter to Exit... |
| |
| The client is very similar to the calculator sample |
| |
| It locates the RMI service that the SCA runtime is exposing and calls each of |
| the calculator operations. Start a new console and use the following commands. |
| |
| cd calculator-rmi-reference |
| ant compile |
| ant run |
| |
| You should see the following output from the run target. |
| |
| run: |
| [java] 3 + 2=5.0 |
| [java] 3 - 2=1.0 |
| [java] 3 * 2=6.0 |
| [java] 3 / 2=1.5 |
| |
| If you now return to the console window running the server and press enter the |
| server should stop. |
| |
| Building And Running The Sample Using Maven |
| ------------------------------------------- |
| With either the binary or source distributions the sample can be built and run |
| using Maven as follows. |
| |
| cd calculator-rmi-service |
| mvn |
| |
| You should see the following output from the test phase. |
| |
| ------------------------------------------------------- |
| T E S T S |
| ------------------------------------------------------- |
| Running calculator.CalculatorRMIServerTestCase |
| Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 5.819 sec |
| |
| Results : |
| |
| Tests run: 1, Failures: 0, Errors: 0, Skipped: 0 |
| |
| This shows that the Junit test cases have run successfully. |