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CS407: Network Applications Development

Unit 8: Transporting Function Calls   In the last unit, you learned how objects can be transported across networks so that other programmers can use those objects’ methods.  This unit will introduce a different method of object sharing: initiating a function call on a certain object type when the object resides on a remote machine by using Java RMI and SOAP.  The unit will close with a discussion of programming excellence including program correctness, robustness, and efficiency.

Unit 8 Time Advisory
This unit should take you approximately 12 hours to complete.

☐    Subunit 8.1: 4 hours

☐    Subunit 8.2: 4 hours

☐    Subunit 8.3: 4 hours

Unit8 Learning Outcomes
Upon successful completion of this unit, the student will be able to:
- Explain object sharing in a network.  - Explain the purpose and use of Java RMI. - Explain the purpose and use of the SOAP. - Complete Java RMI and SOAP programming tasks. - Code problems using of techniques for program excellence.

8.1 Java RMI   - Reading: Oracle's “An Overview of RMI Applications” Link: Oracle's “An Overview of RMI Applications” (HTML)
 
Instructions: Please read this entire webpage.  As you look at the components required for a Java application, what is included that you have not seen anywhere else in this course?  Excluding the application example, there should not be anything new. 
 
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8.1.1 Oracle's “Writing an RMI Server”   - Reading: Oracle's “Writing an RMI Server” Link: Oracle's “Writing an RMI Server” (HTML)
 
Instructions: Please read this page.  This material has been divided into two separate readings.  The RMI Design Process will be covered in subunit 8.1.2 that follows.  The RMI Implementation Process will be covered in subunit 8.1.3 below. 
 
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8.1.2 RMI Design Process   - Reading: Oracle's “Designing a Remote Interface” Link: Oracle's “Designing a Remote Interface” (HTML)
 
Instructions: Please complete this page.  Review the sample code to see how to build the compute engine to process code from any machine. 
 
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8.1.3 RMI Implementation Process   - Reading: Oracle's “Implementing a Remote Interface” Link: Oracle's “Implementing a Remote Interface” (HTML)
 
Instructions: Please complete this page.  Review the sample code to see how to build the interface to implement the compute engine.
 
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8.1.4 Creating a Client Program   - Reading: Oracle's “Creating a Client Program” Link: Oracle's “Creating a Client Program” (HTML)
 
Instructions: Please read the screen carefully.  Review the sample code to see how to create a client program to define the task to be performed by the compute engine. 
 
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8.1.5 Running Java RMI   - Reading: Oracle's “Compiling and Running the Example” Link: Oracle's “Compiling and Running the Example” (HTML)

 Instructions: Please compile and run the example.  You will need to
use both links provided in the material.  What is your problem, and
what output does this process produce?  

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displayed on the webpage above.

8.2 Simple Object Access Protocol (SOAP) and SOAP with Attachments API for Java (SAAJ)   - Reading: Sun Microsystem’s “Overview of SAAJ” Link: Sun Microsystem’s “Overview of SAAJ” (HTML)
 
Instructions: Please read the “Overview of SAAJ” tutorial.  SAAJ is an API that developers can use to write SOAP messaging applications directly, especially for XML messaging from the Java platform.  Because the SAAJ API conforms to the Simple Object Access Protocol (SOAP) specification, the elements of SOAP are also covered in the 6.2 subunits that follow. 
 
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8.2.1 SOAP Protocol   - Reading: W3C's “Simple Object Access Protocol (SOAP)” Link: W3C's “Simple Object Access Protocol (SOAP)” (HTML)
 
Instructions: Please complete the SOAP tutorial.  As you progress through this material, you will have the opportunity to examine the SOAP protocol as specified by W3C.  Compile and run each of the examples provided.
 
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8.2.2 SAAJ   - Reading: Sun Microsystem’s “Overview of SAAJ” Link: Sun Microsystem’s “Overview of SAAJ” (HTML)
 
Instructions: Please complete the SAAJ tutorial found at this link.  Follow the steps in the material to create a SOAP message, send the message, and retrieve the response. 
 
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8.2.3 Examples   - Reading: Sun Microsystem’s “Code Examples” Link: Sun Microsystem’s “Code Examples” (HTML)
 
Instructions: Complete the “Code Examples” tutorial starting with the first example.  Follow the instructions that precede each example.  Look for the SOAP elements in each example.  Once you compile and run each example, proceed to the next one.  A good reference for using SOAP can be found here.
 
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8.3 Correctness, Robustness, and Efficiency   - Reading: Hobart and William Smith Colleges: David J. Eck's Introduction to Programming Using Java: “Chapter 8: Introduction to Correctness and Robustness” Link: Hobart and William Smith Colleges: David J. Eck's Introduction to Programming Using Java: “Chapter 8: Introduction to Correctness and Robustness” (PDF)
 
Instructions: Please read all of Chapter 8.  The topics of each section in Chapter 8 cover the material you need to know for subunits 8.3.1 through 8.3.6.  Now that you have completed the prior units, showing you how the Java language is used in the network programming environment, it is time for you to hone in on your skills to be a superior Java programmer.  As you complete each subunit compare and contrast each tool for creating the most efficient code.
 
Terms of Use: The article above is released under a Creative Commons Attribution-Non-Commercial-Share-Alike License 3.0.  It is attributed to David Eck and the original version can be found here.

8.3.1 Correctness and Robustness   - Reading: Hobart and William Smith Colleges: David J. Eck's Introduction to Programming Using Java: “Section 8.1: Introduction to Correctness and Robustness” Link: Hobart and William Smith Colleges: David J. Eck's Introduction to Programming Using Java: “Section 8.1: Introduction to Correctness and Robustness” (PDF)
 
Instructions: Please read all of  Section 8.1.  Explain the difference between correctness and robustness.
 
Terms of Use: The article above is released under a Creative Commons Attribution-Non-Commercial-Share-Alike License 3.0.  It is attributed to David Eck and the original version can be found here.

8.3.2 Writing Correct Programs   - Reading: Hobart and William Smith Colleges: David J. Eck's Introduction to Programming Using Java: “Section 8.2: Writing Correct Programs” Link: Hobart and William Smith Colleges: David J. Eck's Introduction to Programming Using Java: “Section 8.2: Writing Correct Programs” (PDF)
 
Instructions: Please read all of  Section 8.2.  Compile and run the samples provided in this material.  Explain the role of process and state for correctness.  How does the role of process and state impact robustness?  How do you write code that you can “prove” is correct?
 
Terms of Use: The article above is released under a Creative Commons Attribution-Non-Commercial-Share-Alike License 3.0.  It is attributed to David Eck and the original version can be found here.

8.3.3 Exceptions and Try…Watch   - Reading: Hobart and William Smith Colleges: David J. Eck's Introduction to Programming Using Java: “Section 8.3: Exceptions and Try...Catch” Link: Hobart and William Smith Colleges: David J. Eck's Introduction to Programming Using Java: “Section 8.3: Exceptions and Try...Catch” (PDF)
 
Instructions: Please read all of Section 8.3.  Note the various types of exceptions that might occur and how you can improve your Java code to provide for them.  Compile and run the sample code provided.
 
Terms of Use: The article above is released under a Creative Commons Attribution-Non-Commercial-Share-Alike License 3.0.  It is attributed to David Eck and the original version can be found here.

8.3.4 Assertion and Annotation   - Reading: Hobart and William Smith Colleges: David J. Eck's Introduction to Programming Using Java: “Section 8.4: Assertion and Annotations” Link: Hobart and William Smith Colleges: David J. Eck's Introduction to Programming Using Java: “Section 8.4: Assertion and Annotations” (PDF)
 
Instructions: Please read all of  Section 8.4.  Note that this material provides advanced information for using assertions and annotations in your Java code.
 
Terms of Use: The article above is released under a Creative Commons Attribution-Non-Commercial-Share-Alike License 3.0.  It is attributed to David Eck and the original version can be found here.

8.3.5 Analysis of Algorithms   - Reading: Hobart and William Smith Colleges: David J. Eck's Introduction to Programming Using Java: “Section 8.5: Analysis of Algorithms” Link: Hobart and William Smith Colleges: David J. Eck's Introduction to Programming Using Java: “Section 8.5: Analysis of Algorithms” (PDF)
 
Instructions: Please read all of  Section 8.5.  Network efficiency programs depend on the analysis of algorithms.  This section will show you what this specialization is and how it can be accomplished with Java programs.
 
Terms of Use: The article above is released under a Creative Commons Attribution-Non-Commercial-Share-Alike License 3.0.  It is attributed to David Eck and the original version can be found here.

8.3.6 Programming Exercises   - Assessment: Hobart and William Smith Colleges: David J. Eck's Introduction to Programming Using Java: “Programming Exercises for Chapter 8” Link: Hobart and William Smith Colleges: David J. Eck's Introduction to Programming Using Java: “Programming Exercises for Chapter 8” (PDF)
 
Instructions: Compile and run each programming exercise following the instructions provided with each problem.  You will find the link to the solution in the right hand corner preceding the next problem or end of the assessment.
 
Terms of Use: The article above is released under a Creative Commons Attribution-Non-Commercial-Share-Alike License 3.0.  It is attributed to David Eck and the original version can be found here.