<%@ page import="java.security.Security" %>
<%@ page import="java.net.InetAddress" %>
<%@ page import="java.util.Date" %>
InetAddress Information & Test
InetAddress Information & Test
This JSP is provided as a part of the following TechNote:
"Understanding, Tuning, and Testing the InetAddress Class and Cache"
http://www.IBM.com/support/docview.wss?uid=swg21207534
Information:
<%
// print to page
out.println("Security Property: networkaddress.cache.ttl = " + Security.getProperty("networkaddress.cache.ttl") + "; default: null" + "
");
out.println("Security Property: networkaddress.cache.negative.ttl = " + Security.getProperty("networkaddress.cache.negative.ttl") + "; default: 10" + "
");
out.println(" System Property: sun.net.inetaddr.ttl = " + System.getProperty("sun.net.inetaddr.ttl") + "; default: null" + "
");
out.println(" System Property: sun.net.inetaddr.negative.ttl = " + System.getProperty("sun.net.inetaddr.negative.ttl") + "; default: null" + "
");
out.println(" System Property: com.ibm.cacheLocalHost = " + System.getProperty("com.ibm.cacheLocalHost") + "; default: null" + "
");
out.println(" System Property: java.net.preferIPv4Stack = " + System.getProperty("java.net.preferIPv4Stack") + "; default: null" + "
");
out.println("
");
if (System.getSecurityManager() == null){
out.println(" Java 2 Security: Disabled
");
}else{
out.println(" Java 2 Security: Enabled
");
}
out.println(" InfoTest Mode: JSP
");
%>
Test:
<%
if ((request.getParameter("iterations")!= null) || (request.getParameter("interval")!= null) || (request.getParameter("hostname")!= null)){
//print to log
System.out.println("===/ InetAddress Cache Test /===");
System.out.println("Security Property: networkaddress.cache.ttl = " + Security.getProperty("networkaddress.cache.ttl"));
System.out.println("Security Property: networkaddress.cache.negative.ttl = " + Security.getProperty("networkaddress.cache.negative.ttl"));
System.out.println(" System Property: sun.net.inetaddr.ttl = " + System.getProperty("sun.net.inetaddr.ttl"));
System.out.println(" System Property: sun.net.inetaddr.negative.ttl = " + System.getProperty("sun.net.inetaddr.negative.ttl"));
if (System.getSecurityManager() == null){
System.out.println(" Java 2 Security: Disabled");
}else{
System.out.println(" Java 2 Security: Enabled");
}
System.out.println(" InfoTest Mode: Application");
//print to page
out.println("
Test Results:
");
//variables
int loopTimes = Integer.parseInt(request.getParameter("iterations"));
int interval = Integer.parseInt(request.getParameter("interval"));
String nameToResolve = request.getParameter("hostname");
//print to page
out.println("Iterations " + loopTimes + "
");
out.println("Interval " + interval + "
");
out.println("Hostname to resolve " + nameToResolve + "
");
//print to log
System.out.println("Iterations " + loopTimes);
System.out.println("Interval " + interval);
System.out.println("Hostname to resolve " + nameToResolve);
try{
//loop for user specified number of times.
for (int j = 0; j < loopTimes; j++){
//print startup information: date, nameToResolve
out.println("
");
out.println("Iteration " + j + " // " + new java.util.Date() + "
");
System.out.println("Iteration " + j + " // " + new java.util.Date());
//attempt name resolution and print results to page and log
InetAddress[] results = InetAddress.getAllByName(nameToResolve);
for (int i=0; i < results.length; i++){
String temp = results[i].getHostAddress();
out.println(temp + "
");
System.out.println(temp);
}
//wait user specified amount of time before proceeding
out.println("Pause for " + interval + " milliseconds..." + "
");
System.out.println("Pause for " + interval + " milliseconds...");
Thread.sleep(interval);
out.println("Pause complete." + "
");
System.out.println("Pause complete.");
}
out.println("Test Complete.");
System.out.println("===/ InetAddress Cache Test Complete /===");
} catch (Exception e) {
out.println(e);
System.out.println(e);
}
}
%>