253 lines
7.6 KiB
HTML
253 lines
7.6 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Example: Using KeyedDataQueue" />
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<meta name="abstract" content="" />
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<meta name="description" content="" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="dqkeyedproducerexample" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Example: Using KeyedDataQueue</title>
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</head>
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<body id="dqkeyedproducerexample"><a name="dqkeyedproducerexample"><!-- --></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 KeyedDataQueue</h1>
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<div><p></p>
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<div class="section"><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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// Data Queue example. This program uses the KeyedDataQueue class to put
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// records on a data queue.
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//
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// The key is a number and the data is a Unicode string. This program
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// shows one way to convert on int into a byte array and how to convert
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// a Java string into a byte array so it can be written to the queue.
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//
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// This is the producer side of the producer/consumer example. It puts work
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// items on the queue for the consumer to process.
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//
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// Command syntax:
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// DQKeyedProducer system
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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 java.net.*;
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import com.ibm.as400.access.*;
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public class DQKeyedProducer extends Object
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{
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// Create a reader to get input from the user.
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static BufferedReader inputStream =
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new BufferedReader(new InputStreamReader(System.in),1);
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public static void main(String[] parameters)
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{
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System.out.println( " " );
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// if the system name was not specified, display help text and exit.
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if (parameters.length >= 1)
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{
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// The first parameter is the system that contains the data queue.
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String system = parameters[0];
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System.out.println("Priority is a numeric value. The value ranges are:");
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System.out.println(" 0 - 49 = low priority");
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System.out.println(" 50 - 100 = medium priority");
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System.out.println("100 + = high priority");
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System.out.println(" ");
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try
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{
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// Create an AS400 object for the server that has the data queue.
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AS400 as400 = new AS400(system);
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// Use CommandCall to create the library that contains the
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// data queue.
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CommandCall crtlib = new CommandCall(as400);
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crtlib.run("CRTLIB JAVADEMO");
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// Create the data queue object.
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QSYSObjectPathName name = new QSYSObjectPathName("JAVADEMO", "PRODCON2", "DTAQ");
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KeyedDataQueue dq = new KeyedDataQueue(as400, name.getPath());
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// Create the data queue just in case this is the first time this
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// program has run. The queue already exists exception is caught
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// and ignored. The length of the key is four bytes, the length
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// of an entry is 96 bytes.
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try
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{
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dq.create(4, 96);
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}
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catch (Exception e) {};
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// Get the data from the user.
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System.out.print("Enter message: ");
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String message = inputStream.readLine();
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System.out.print("Enter priority: ");
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int priority = getInt();
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// While there is data to put on the queue.
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while (priority > 0)
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{
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// We want to write a java string as the entry to the queue.
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// Input the data queue is a byte array, however, so convert
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// the string to a byte array.
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byte [] byteData = message.getBytes("UnicodeBigUnmarked");
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// The key is a number. Input to the data queue is a byte
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// array, however, so convert the int to a byte array;
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byte [] byteKey = new byte[4];
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byteKey[0] = (byte) (priority >>> 24);
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byteKey[1] = (byte) (priority >>> 16);
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byteKey[2] = (byte) (priority >>> 8);
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byteKey[3] = (byte) (priority);
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System.out.println("");
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System.out.println("Writing record to the server...");
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System.out.println("");
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// Write the record to the data queue.
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dq.write(byteKey, byteData);
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// Get the next value from the user.
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System.out.print("Enter message: ");
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message = inputStream.readLine();
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System.out.print("Enter priority: ");
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priority = getInt();
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}
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}
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catch (Exception e)
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{
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// If any of the above operations failed say the data queue
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// operation and output the exception.
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System.out.println("Data Queue operation failed");
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System.out.println(e);
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}
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}
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// Display help text when parameters are incorrect.
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else
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{
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System.out.println("");
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System.out.println("");
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System.out.println("");
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System.out.println("Parameters are not correct. Command syntax is:");
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System.out.println("");
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System.out.println(" DQKeyedProducter system");
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System.out.println("");
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System.out.println("Where");
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System.out.println("");
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System.out.println(" system = server that has the data queue");
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System.out.println("");
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System.out.println("For example:");
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System.out.println("");
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System.out.println(" DQKeyedProducer mySystem");
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System.out.println("");
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System.out.println("");
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}
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System.exit(0);
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}
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// This is the subroutine that gets a character string from the user
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// and converts it into an int.
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static int getInt()
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{
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int i = 0;
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boolean Continue = true;
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while (Continue)
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{
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try
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{
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String s = inputStream.readLine();
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i = (new Integer(s)).intValue();
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Continue = false;
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}
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catch (Exception e)
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{
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System.out.println(e);
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System.out.print("Please enter a number ==>");
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}
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}
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return i;
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}
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}</pre>
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</div>
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</div>
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</body>
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</html>
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