229 lines
8.9 KiB
HTML
229 lines
8.9 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="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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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 DataQueue classes to put data on a queue" />
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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="dqproducerexample" />
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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 DataQueue classes to put data on a queue</title>
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</head>
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<body id="dqproducerexample"><a name="dqproducerexample"><!-- --></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 DataQueue classes to put data on a queue</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 DataQueue class to put
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// records on a data queue.
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//
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// This example uses the Record and Record format classes to put data
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// on the queue. String data is converted from Unicode to ebcdic
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// and numbers are converted from Java to the server format. Since data
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// is converted the data queue entries can be read by a server program
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// or a iSeries Access for Windows program as well as another Java program.
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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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// DQProducerExample 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 DQProducerExample 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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try
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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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// 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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// Build a record format for the format of the data queue entry.
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// This format matches the format in the DQConsumer class. A
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// record consists of:
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// - a four byte number -- the customer number
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// - a four byte number -- the part number
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// - a 20 character string -- the part description
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// - a four byte number -- the number of parts in this order
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// First create the base data types.
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BinaryFieldDescription customerNumber =
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new BinaryFieldDescription(new AS400Bin4(), "CUSTOMER_NUMBER");
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BinaryFieldDescription partNumber =
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new BinaryFieldDescription(new AS400Bin4(), "PART_NUMBER");
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CharacterFieldDescription partName =
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new CharacterFieldDescription(new AS400Text(20, as400), "PART_NAME");
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BinaryFieldDescription quantity =
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new BinaryFieldDescription(new AS400Bin4(), "QUANTITY");
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// Build a record format and fill it with the base data types.
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RecordFormat dataFormat = new RecordFormat();
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dataFormat.addFieldDescription(customerNumber);
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dataFormat.addFieldDescription(partNumber);
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dataFormat.addFieldDescription(partName);
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dataFormat.addFieldDescription(quantity);
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// Create the library that contains the data queue
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// using CommandCall.
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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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DataQueue dq = new DataQueue(as400, "/QSYS.LIB/JAVADEMO.LIB/PRODCONS.DTAQ");
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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.
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try
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{
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dq.create(96);
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}
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catch (Exception e) {};
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// Get the first field of data from the user.
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System.out.print("Enter customer number (or 0 to quit): ");
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int customer = getInt();
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// While there is data to put on the queue.
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while (customer > 0)
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{
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// Get the rest of the data for this order from the user.
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System.out.print("Enter part number: ");
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int part = getInt();
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System.out.print("Enter quantity: ");
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int quantityToOrder = getInt();
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String description = "part " + part;
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// Create a record based on the record format. The record
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// is empty now but will eventually contain the data.
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Record data = new Record(dataFormat);
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// Set the values we received from the user into the record.
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data.setField("CUSTOMER_NUMBER", new Integer(customer));
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data.setField("PART_NUMBER", new Integer(part));
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data.setField("QUANTITY", new Integer(quantityToOrder));
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data.setField("PART_NAME", description);
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// Convert the record into a byte array. The byte array is
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// what is actually put to the data queue.
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byte [] byteData = data.getContents();
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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(byteData);
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// Get the next value from the user.
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System.out.print("Enter customer number (or 0 to quit): ");
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customer = 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 failed 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(" DQProducter 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(" DQProducerExample 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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