1 / 21

Assignments Preliminaries

Assignments Preliminaries. Several computers are configured at WCU for the assignments. Here, terra.cs.wcu.edu will be used. For technical reasons, students using the WCU computers will first ssh into sol.cs.wcu.edu, and from there ssh into terra.cs.wcu.edu.

axelle
Download Presentation

Assignments Preliminaries

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. AssignmentsPreliminaries • Several computers are configured at WCU for the assignments. Here, terra.cs.wcu.edu will be used. • For technical reasons, students using the WCU computers will first ssh into sol.cs.wcu.edu, and from there ssh into terra.cs.wcu.edu.

  2. Assignment 1“Deploying a Simple Web Service” Acknowledgement This assignment is derived from: “Classroom Exercises for Grid Services” by A. Apon, J. Mache, Y. Yara, and K. Landrus, Proc. 5th Int. Conference on Linux Clusters: The HPC Revolution, May 2004.

  3. Task • To build, deploy and test a simple web service.

  4. Tools This assignment uses: • Java 2 platform standard edition • Apache Jakarta Tomcat Java servlet container • Apache Axis tools

  5. Steps • Write the Java code to implement the web service. • Use Axis to generate all needed Java source files. • Compile the source files just generated. • Create client source and compile. • Execute client to access service. • Extend the functionality of the service.

  6. Web service Client Apache hosting environment

  7. Axis Java Web Service Facility • Place a jws (rather than java) file in your web application directory structure and Axis will automatically find it, compile it, and deploy the methods.

  8. Step 1 – Implement Service Using Java write the code for the class that provides the web service. This code is: public class MyMath { public int squared(int x) { return x * x; } } Save that code as a .jws (Java Web Service) file, Math.jws.

  9. Step 1 (continued) Copy the .jws file to the axis directory: cp MyMath.jws \ $CATALINA_HOME/webapps/axis/yourusername Copying is needed so that the axis tools will be able to find the .jws file

  10. Step 2 Generate WSDL files Use the Axis tools to create four Java source files from MyMath.jws using the command: java -classpath $AXISCLASSPATH \ org.apache.axis.wsdl.WSDL2Java \ http://localhost:8080/axis/MyMath.jws?wsdl

  11. Step 2 (continued) Axis finds MyMath.jws file and creates • Two source files each holding a Java interface, • MyMath.java and • MyMathService.java • Two source files each holding a Java class, • MyMathServiceLocator.java • MyMathSoapBindingStub.java These files are put in a new package in localhost/axis/yourusername/MyMath_jws/ which is in /home/yourusername/WebServices/

  12. Step 3 Compile new source files Compile source files generated by step 2 with: javac -classpath $AXISCLASSPATH \ localhost/axis/yourusername/MyMath_jws/*.java

  13. Step 4: Write Client Source import localhost.axis.yourusername.MyMath_jws.MyMathServiceLocator; import localhost.axis.yourusername.MyMath_jws.MyMathService; import localhost.axis.yourusername.MyMath_jws.MyMath; public class MyMathClient { public static void main(String args[]) throws Exception { MyMathService service = new MyMathServiceLocator(); MyMath myMath = service.getMyMath(); int x = (new Integer(args[0])).intValue(); System.out.println("The square of " + args[0] + " is " + myMath.squared(x)); } }

  14. Step 5 Compile Client code Compile the client source file with: javac -classpath $AXISCLASSPATH:. MyMathClient.java

  15. Step 6 Execute Web Service program java -classpath $AXISCLASSPATH MyMathClient 4 The square of 4 is 16

  16. Step 7 Extend the Web Service Add functionality to the MyMath web service: • Add a method that returns whether a number is even. Modify MyMath.jws file and repeat all previous steps to test the extended web service.

  17. Step 8 (not in handout)Extra Credit • For extra credit, create a second web service and demonstrate a client using two web services.

  18. Submission of Assignment 1 Produce a 2-4 page Word document. • Includes how you modified the service (code and explanation). • Show that you successfully followed the instructions and performs all tasks by taking screen shots and include these screen shots in the document. Number of screen shots is up to you but it should demonstrate your programs worked. • To include screen shots from Windows XP, select window, press Alt-Printscreen, and paste to file.

  19. Submission continued • Submit your document to me electronically using the WCU Department of Mathematics and Computer Science electronic submission system called Hermes. PLEASE DO NOT SUBMIT BY EMAIL TO ME!!

  20. Hermes Submission System • Go to: http://www.cs.wcu.edu/~hermes • Select professor (Barry Wilkinson), then • Select course (CS493 Fall 2004 Grid computing), then • Select your name, then • Select your document and select upload. • A message is displayed as a receipt. • Also email sent to you.

  21. Due Date • 11:59 pm Thursday September 9th, 2004 unless we have system problems.

More Related