187 lines
7.3 KiB
HTML
187 lines
7.3 KiB
HTML
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<meta name="DC.Title" content="Example: Using record-level access (part 1 of 2)" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Example: Using record-level access (part 1 of 2)</title>
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</head>
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<body id="rlaex1"><a name="rlaex1"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Example: Using record-level access (part 1 of 2)</h1>
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<div><p></p>
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<div class="section"><p>[ <a href="rlaex2.htm#rlaex2">Next part</a> ]</p>
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<p>Use
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the following as an example for your program.</p>
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<div class="note"><span class="notetitle">Note:</span> Read the <a href="codedisclaimer.htm#codedisclaimer">Code
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example disclaimer</a> for important legal information.</div>
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<pre>//////////////////////////////////////////////////////////////////////////////////
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//
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// Record level access example. This program will prompt the user
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// for the name of the server and the file to display. The file must exist
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// and contain records. Each record in the file will be displayed
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// to System.out.
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//
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// Calling syntax: java RLSequentialAccessExample
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//
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// This source is an example of IBM Toolbox for Java "RecordLevelAccess"
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//
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//////////////////////////////////////////////////////////////////////////////////
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import java.io.*;
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import java.util.*;
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import com.ibm.as400.access.*;
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public class RLSequentialAccessExample
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{
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public static void main(String[] parameters)
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{
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BufferedReader inputStream = new BufferedReader(new InputStreamReader(System.in),1);
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String systemName = "";
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String library = "";
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String file = "";
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String member = "";
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System.out.println();
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try
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{
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System.out.print("System name: ");
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systemName = inputStream.readLine();
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System.out.print("Library in which the file exists: ");
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library = inputStream.readLine();
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System.out.print("File name: ");
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file = inputStream.readLine();
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System.out.print("Member name (press enter for first member): ");
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member = inputStream.readLine();
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if (member.equals(""))
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{
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member = "*FIRST";
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}
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System.out.println();
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}
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catch (Exception e)
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{
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System.out.println("Error obtaining user input.");
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e.printStackTrace();
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System.exit(0);
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}
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AS400 system = new AS400(systemName); <a href="#rlaex1__dup0013">Note 1 </a>
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try
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{
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system.connectService(AS400.RECORDACCESS);
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}
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catch(Exception e)
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{
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System.out.println("Unable to connect for record level access.");
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System.out.println("Check the programmer's guide setup file for
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special instructions regarding record level access");
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e.printStackTrace();
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System.exit(0);
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}
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QSYSObjectPathName filePathName = new QSYSObjectPathName(library, file, member, "MBR"); <a href="#rlaex1__dup0014">Note 2</a>
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SequentialFile theFile = new SequentialFile(system, filePathName.getPath()); <a href="#rlaex1__dup0015">Note 3 </a>
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AS400FileRecordDescription recordDescription =
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new AS400FileRecordDescription(system, filePathName.getPath());
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try
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{
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RecordFormat[] format = recordDescription.retrieveRecordFormat(); <a href="#rlaex1__dup0016">Note 4 </a>
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theFile.setRecordFormat(format[0]); <a href="#rlaex1__dup0017">Note 5 </a>
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theFile.open(AS400File.READ_ONLY, 100, AS400File.COMMIT_LOCK_LEVEL_NONE); <a href="#rlaex1__dup0018">Note 6 </a>
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System.out.println("Displaying file " + library.toUpperCase() + "/" +
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file.toUpperCase() + "(" + theFile.getMemberName().trim() + "):");
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Record record = theFile.readNext(); <a href="#rlaex1__dup0019">Note 7 </a>
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while (record != null)
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{
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System.out.println(record);
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record = theFile.readNext();
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}
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System.out.println();
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theFile.close(); <a href="#rlaex1__eight">Note 8 </a>
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system.disconnectService(AS400.RECORDACCESS); <a href="#rlaex1__nine">Note 9 </a>
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}
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catch (Exception e)
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{
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System.out.println("Error occurred attempting to display the file.");
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e.printStackTrace();
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try
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{
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// Close the file
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theFile.close();
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}
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catch(Exception x)
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{
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}
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system.disconnectService(AS400.RECORDACCESS);
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System.exit(0);
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}
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// Make sure that the application ends; see readme for details
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System.exit(0);
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}
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}</pre>
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<div class="fignone"></div>
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</div>
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<div class="section"><ol><li id="rlaex1__dup0013"><a name="rlaex1__dup0013"><!-- --></a>This line of code creates an AS400 object and connects to
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the record-level access service.</li>
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<li id="rlaex1__dup0014"><a name="rlaex1__dup0014"><!-- --></a>This line creates a QSYSObjectPathName object that obtains
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the integrated file system path name form of the object to be displayed.</li>
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<li id="rlaex1__dup0015"><a name="rlaex1__dup0015"><!-- --></a>This statement creates an object that represents an existing
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sequential file on the server you are connected to. This sequential file
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is the file that will be displayed.</li>
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<li id="rlaex1__dup0016"><a name="rlaex1__dup0016"><!-- --></a>These lines retrieve the record format of the file.</li>
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<li id="rlaex1__dup0017"><a name="rlaex1__dup0017"><!-- --></a>This line sets the record format for the file.</li>
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<li id="rlaex1__dup0018"><a name="rlaex1__dup0018"><!-- --></a>This line opens the selected file for reading. It will read
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100 records at a time, when it is possible.</li>
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<li id="rlaex1__dup0019"><a name="rlaex1__dup0019"><!-- --></a>This line of code reads each record in sequence.</li>
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<li id="rlaex1__eight"><a name="rlaex1__eight"><!-- --></a>This line closes the file.</li>
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<li id="rlaex1__nine"><a name="rlaex1__nine"><!-- --></a>This line disconnects from the record-level access service.</li>
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</ol>
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<p>[ <a href="rlaex2.htm#rlaex2">Next part</a> ]</p>
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</div>
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</div>
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</body>
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</html> |