Wednesday, February 24, 2016

Architecture Complexity

Here are the items to consider:

  • Coding to an interface
  • Service Oriented Architecture
  • Automated Testing
  • Domain Driven Design
  • Custom Data Access Layer
  • Layered architecture
Complexity is relatively equal the number of lines of code. Note that complexity is not bad. It must be justified.

Friday, July 31, 2015

IBM Health Center - No JVM Detected on WebSphere 7

Modify the content of the configuration file.




Monday, October 27, 2014

Android Studio:Unknown Host Error

After installing Android Studio, I got the following error:

Unknown host ''.

Please ensure the host name is correct. If you are behind an HTTP proxy, please configure the proxy settings either in Android Studio or Gradle.

Consult IDE log for more details (Help | Show Log)

File --> Settings --> HTTP Proxy --> Auto-detect proxy settings

Wednesday, December 12, 2012

Exposing WCF Service wsHttpBinding to SoapUI

Testing a WCF Service with wsHttpBinding in SoapUI gives you the following error:
The message could not be processed. This is most likely because the action ‘[Insert Web Service Action Here]’ is incorrect or because the message contains an invalid or expired security context token or because there is a mismatch between bindings. The security context token would be invalid if the service aborted the channel due to inactivity. To prevent the service from aborting idle sessions prematurely increase the Receive timeout on the service endpoint’s binding.

SoapUI doesn't support security context tokens. Add these lines in Web.config:


Make sure that SoapUI has WS-Addressing set to true.

Thursday, September 20, 2012

C# Builder Pattern

So I have been learning C# lately and trying to apply some concepts from Joshua Bloch's Effective Java 2.

The builder pattern.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace PaymentLibrary
    public sealed class CardType
        public string Id { get; private set; }
        public string Name { get; private set; }
        public string IssueFlag { get; private set; }
        public IList<int> Lengths { get; private set; }
        public IList<string> Prefixes { get; private set; }

        private CardType()

        public sealed class Builder
            private string id;
            private string name;
            private string issueFlag;
            private IList<int> lengths = new List<int>();
            private IList<string> prefixes = new List<string>();

            public Builder WithId(string id)
       = id;
                return this;

            public Builder WithName(string name)
       = name;
                return this;

            public Builder WithLength(int length)
                return this;

            public Builder WithIssueFlag(string issueFlag)
                this.issueFlag = issueFlag;
                return this;

            public Builder WithPrefix(string prefix)
                return this;

            public CardType Build()
                CardType cardType = new CardType();
                cardType.Id = id;
                cardType.Name = name;
                cardType.IssueFlag = issueFlag;
                cardType.Lengths = lengths;
                cardType.Prefixes = prefixes;
                return cardType;

CardType cardType = new CardType.Builder()

Wednesday, July 25, 2012

Brain as the tool of the spirit

The mind as the bridge between pure consciousness and the body in which that consciousness temporarily resides.

Thursday, June 21, 2012

The danger of sharing too much information

Information... Where does it go?


Think twice before you share.

Friday, April 27, 2012

DNS Lookup in Java

A simple DNS lookup in Java

public class DNSLookup {
    public static void main(String... args) {
        InetAddress inet = null;
        try {
            final String host = "";
            inet = InetAddress.getByName(host);
            System.out.println("DNS Lookup: " + host);
            System.out.println("IP Adress: " + inet.getHostAddress());
        } catch (UnknownHostException e) {
By using the InetAddress API you will be able to obtain the IP address of the target.

Thursday, April 26, 2012

Reversing a linked list in C++

Linked list is one of the most popular data structures in Computer Science. Read more about linked lists [here]. In this entry we will write a function to reverse a linked list in C++ efficiently.
Link* reverse_list(Link* p)
    if (p == NULL)
        return NULL;

    Link* h = p;
    p = p->next;
    h->next = NULL;

    while(p != NULL)
        Link* t = p->next;
        p->next = h;
        h = p;
        p = t;

    return h;

Thursday, March 24, 2011

Fiddler Web Debugging Proxy

Here's a useful tool for debugging web apps specifically running in IE versions 8 and below. This is not just limited to applications running on the browser though, it can listen to any application utilizing HTTP / HTTPS. You do not need to configure your proxy settings to redirect traffic, it just works on the fly.

IE 9 has Developer Tools in it, more info [here] just like FireBug for Firefox and Chrome Developer Tools.

It does not mean that we can not use it though. I would still recommend it for debugging HTTP / HTTPS communication to avoid looking at 3 different tools.

Wednesday, March 23, 2011

Number of Simultaneous Connections in IIS

So I have reached the testing phase of the anti CSRF / CSS / SQL Injection fixes for a classic ASP web application at work. Luckily it didn’t take me long enough to learn the language. My machine will be used for quality assurance purposes. I have encountered an error regarding the number of simultaneous connections made to my local IIS webserver while running OWASP CSRFTester Project.

The fix is simple; just increase the number of simultaneous connections for IIS using the command below:

Assuming your PWD is inetpub\adminscripts

cscript adsutil.vbs set w3svc/MaxConnections 40

Sunday, March 20, 2011

Repair Windows 7 System Files

8 out of 10 average PC users have their box’s system files altered by malwares, viruses, etc. We usually reinstall the OS if the antivirus and anti malware software did not perform their job well. Here’s one way to fix the corrupted system files without the need of restarting your Windows 7 box.

1. Run the Command Prompt as Administrator
2. Type the following command

C:\Windows\system32\> sfc /scannow


3. After the verification phase, you will receive a message about your system files’ integrity

Windows Resource Protection did not find any integrity violations.

Saturday, March 19, 2011

Android Intent

What is an Android Intent?

- functions like a verb
- something like “open contacts manager”, “search contacts”, “call contact”, and etc.
- I see it something like a description of a method / action to be performed
- used for starting other Activities

You can read more about this here: Android Intent

Monday, March 14, 2011

Android Activity

What is an Android Activity?

- one of the building blocks of an Android application
- used for rendering user interfaces that can respond to events
- a single screen
- can return a value to the previous activity
- pushed into a stack every time a new activity starts

You can read more about this here: Android Activity

Let’s help Japan

Help The Victims of the 8.9 Earthquake in Japan by Spreading Awareness and Aid. Visit to donate.