How to use Apache Benchmarking tool

Apache Benchmarking tool is used for doing load test for web applications.
Below is an example of using it :

ab -n 1000 -c 100 "http://ip:port/test"

-n - number of requests
-c - number of concurrency requests

How to move applicationContext-hibernate.xml outside the web applcation

Import a .js file in another js file

function inc(filename)
{
var body = document.getElementsByTagName('head')[0];
script = document.createElement('script');
script.src = filename;
script.type = 'text/javascript';
body.appendChild(script);
}

inc("jscripts/HelpWindow.js");
inc("jscripts/shortcut.js");

Https Configuration in Tomcat

How to configure SSL on Tomcat
Steps to create keystore file.
1. >cd $CATALINA_HOME
2. > $JAVA_HOME/keytool -genkey -alias tomcat -keyalg RSA -keystore mycert.jks
3. Enter keystore password: changeit
4. What is your first and last name? [Unknown]: Company
5. What is the name of your organizational unit? [Unknown]: IT
6. What is the name of your organization? [Unknown]: My Comp.
7. What is the name of your City or Locality? [Unknown]: KL
8. What is the name of your State or Province? [Unknown]: KL
9. What is the two-letter country code for this unit? [Unknown]: MY
10. US Is CN= Company, OU=IT, O=”My Comp.”, L=KL, ST=KL, C=MY correct? [no]: yes
11. Enter key password for (RETURN if same as keystore password): Hit Enter.
Tomcat will assume the password is “changeit” by default so it’s advised to leave it that way.
Steps to configure Tomcat to use the keystore file.
1,cd $CATALINA_HOME/conf/
2,vi server.xml
3,Look for “ Define a SSL HTTP/1.1 Connector on port 8443 ”. Remove the comments indicator and add the keystore info.

Define a SSL HTTP/1.1 Connector on port 8443
Connector port="443" protocol="HTTP/1.1" SSLEnabled="true" maxThreads="150" scheme="https" secure="true" clientAuth="false" keystoreFile="/app/interface/ui/mycert.jks" sslProtocol="TLS"

4,Make sure redirect port is set as 443 as below in server.xml.
Connector port="9090" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="443"

5,In Application’s web.xml following lines need to be added.
security-constraint




6,Restart Tomcat server and test.

Eclipse Issue "An internal error occurred during: "Items filtering". Class file name must end with .class"

Deleting the corrupted search index which is explained in Eclipse bug’s #269820 comment.

How to delete the search index:

1. Close Eclipse
2. Delete workspace/.metadata/.plugins/org.eclipse.jdt.core/*.index
3. Delete workspace/.metadata/.plugins/org.eclipse.jdt.core/savedIndexNames.txt
4. Start Eclipse again

This fixed the issue for me.

POST Method request Using JavaScript

How to simulate the below in javascript ?

action=http://example.com/ method=POST

input type=hidden name=q value=a

How to call the javascript function :

post_to_url('http://example.com/', {'q':'a'});

function post_to_url(path, params, method) {
method = method || "post"; // Set method to post by default, if not specified.

// The rest of this code assumes you are not using a library.
// It can be made less wordy if you use one.
var form = document.createElement("form");
form.setAttribute("method", method);
form.setAttribute("action", path);

for(var key in params) {
var hiddenField = document.createElement("input");
hiddenField.setAttribute("type", "hidden");
hiddenField.setAttribute("name", key);
hiddenField.setAttribute("value", params[key]);

form.appendChild(hiddenField);
}

document.body.appendChild(form); // Not entirely sure if this is necessary
form.submit();
}

Hope this helped someone.