163 lines
7.5 KiB
HTML
163 lines
7.5 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 AS400ConnectionPool" />
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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.Identifier" content="connectpoolexample" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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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 AS400ConnectionPool</title>
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</head>
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<body id="connectpoolexample"><a name="connectpoolexample"><!-- --></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 AS400ConnectionPool</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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// AS400ConnectionPooling example. This program uses an AS400ConnectionPool to
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// create connections to an iSeries server.
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// Command syntax:
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// AS400ConnectionPooling system myUserId myPassword
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//
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// For example,
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// AS400ConnectionPooling MySystem MyUserId MyPassword
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//
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//////////////////////////////////////////////////////////////////////////////////
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import com.ibm.as400.access.*;
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public class AS400ConnectionPooling
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{
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public static void main (String[] parameters)
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{
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// Check the input parameters.
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if (parameters.length != 3)
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{
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System.out.println("");
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System.out.println("Usage:");
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System.out.println("");
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System.out.println(" AS400ConnectionPooling system userId password");
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System.out.println("");
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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("");
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System.out.println(" AS400ConnectionPooling MySystem MyUserId MyPassword");
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System.out.println("");
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return;
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}
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String system = parameters[0];
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String userId = parameters[1];
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String password = parameters[2];
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try
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{
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// Create an AS400ConnectionPool.
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AS400ConnectionPool testPool = new AS400ConnectionPool();
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// Set a maximum of 128 connections to this pool.
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testPool.setMaxConnections(128);
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// Set a maximum lifetime for 30 minutes for connections.
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testPool.setMaxLifetime(1000*60*30); // 30 min Max lifetime since created.
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// Preconnect 5 connections to the AS400.COMMAND service.
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testPool.fill(system, userId, password, AS400.COMMAND, 1);
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System.out.println();
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System.out.println("Preconnected 1 connection to the AS400.COMMAND service");
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// Call getActiveConnectionCount and getAvailableConnectionCount to see how many
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// connections are in use and available for a particular system.
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System.out.println("Number of active connections: "
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+ testPool.getActiveConnectionCount(system, userId));
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System.out.println("Number of available connections for use: "
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+ testPool.getAvailableConnectionCount(system, userId));
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// Create a connection to the AS400.COMMAND service. (Use the service number
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// constants defined in the AS400 class (FILE, PRINT, COMMAND, DATAQUEUE, and so on.))
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// Since connections have already been filled, the usual time spent connecting
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// to the command service is avoided.
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AS400 newConn1 = testPool.getConnection(system, userId, password, AS400.COMMAND);
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System.out.println();
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System.out.println("getConnection gives out an existing connection to user");
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System.out.println("Number of active connections: "
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+ testPool.getActiveConnectionCount(system, userId));
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System.out.println("Number of available connections for use: "
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+ testPool.getAvailableConnectionCount(system, userId));
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// Create a new command call object and run a command.
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CommandCall cmd1 = new CommandCall(newConn1);
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cmd1.run("CRTLIB FRED");
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// Return the connection to the pool.
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testPool.returnConnectionToPool(newConn1);
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System.out.println();
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System.out.println("Returned a connection to pool");
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System.out.println("Number of active connections: "
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+ testPool.getActiveConnectionCount(system, userId));
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System.out.println("Number of available connections for reuse: "
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+ testPool.getAvailableConnectionCount(system, userId));
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// Create a connection to the AS400.COMMAND service. This will return the same
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// object as above for reuse.
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AS400 newConn2 = testPool.getConnection(system, userId, password, AS400.COMMAND);
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System.out.println();
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System.out.println("getConnection gives out an existing connection to user");
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System.out.println("Number of active connections: "
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+ testPool.getActiveConnectionCount(system, userId));
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System.out.println("Number of available connections for reuse: "
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+ testPool.getAvailableConnectionCount(system, userId));
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// Create a connection to the AS400.COMMAND service. This will create a new
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// connection as there are not any connections in the pool to reuse.
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AS400 newConn3 = testPool.getConnection(system, userId, password, AS400.COMMAND);
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System.out.println();
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System.out.println("getConnection creates a new connection because there are no
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connections available");
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System.out.println("Number of active connections: "
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+ testPool.getActiveConnectionCount(system, userId));
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System.out.println("Number of available connections for reuse: "
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+ testPool.getAvailableConnectionCount(system, userId));
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// Close the test pool.
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testPool.close();
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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 pool operations failed
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// and output the exception.
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System.out.println("Pool operations failed");
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System.out.println(e);
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e.printStackTrace();
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}
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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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