Using NDM (Network Data Mover)

This is my old posting posted at planetsourcecode.com which I am re-posting on my own blog...

Recently, I got an assignment to create a module for archiving the transaction files. The files range from 1KB to 100GB. The system gets about a million such files everyday for transactions generated for Asia pacific region from Citibank customers all over the world. The destination can be any type of system (windows, unix, mainframe, etc).

Good thing for us is that these files can be identified by its sources and time zone. The best part is that 100GB files comes from US, they are consolidated files and max 12 a day. I need to focus on the Japan firm banking system since they have multiple 1KB files and all need to process immediately.

Unfortunately, there is no Java API to do it and we cannot use 3^rd part tools. I have written such solutions in Unix shell scripts earlier too, hence the concept is clear.

Solution:

1. Java component to go round-robin to poll the incoming folders (one for each destination) to look for files. This component will manage threads for using existing NMD licenses of Citibank (configurable in XML file).

2. Java thread component to create threads using the priority set in configuration for each destination folder.

3. Java component to write the Unix shell script and execute it using JNI and track the Unix process.

My own free web email website (not yet hosted)

This is my old posting posted at planetsourcecode.com which I am re-posting on my own blog...

I am fascinated by the free email websites coming up every since Hotmail was bought by Microsoft. I am ready with my own free web email website solution for someone to buy or hire me to create for them. Let me give an overview of what and how I created.

Tools and Technologies: Microsoft Exchange Server, COM components, , SQL server 6.5 and site server

Microsoft Exchange Server will be used to send and receive the mails.

We’ll deploy the COM components in transaction server to use cluster of servers to scale for high number of users expected on a free web email website.

SQL server 6.5 to store the emails. Exchange has its limitation with number of users and size of data.

Site server to authenticate the users.

We’ll create COM components for:

1. User registration and Login using site server

2. Inbox view using SQL server

3. Compose and send mail using exchange. Save mails in SQL

4. Read mails (anything@mydomain.com) and save into the user’s account.

I am also working to create this solution in CGI or Java based technologies. Send your comments, it will help me.

Understanding Component Object Model and Distributed Component Object Model

This is my old posting posted at planetsourcecode.com which I am re-posting on my own blog...

Component Object Model (COM) is Microsoft's object-oriented programming model that defines how objects interact within a single application or between applications. In COM, client software accesses an object through a pointer to an interface (a related set of functions called methods) on objects. Both OLE and ActiveX are based on COM.

Distributed Component Object Model (DCOM) allows to run COM remotely to facilitate the transparent distribution of objects over networks and over the Internet.

Internet Printing Protocol (IPP)

We have to deliver a POC in 3 days using IPP, that is Internet Printing Protocol. Essentially, IPP is a standard network protocol for remote printing. Remotely, we can do all the things we do with a printer on our desk like printing pages, managing print jobs in the queue, setting the paper, etc.

An IP is assigned to the printer which enables us to uniquely identify the printer. Now the printer can be placed locally (on your desk) or anywhere in the world. As long as it is connected with the internet, we can use it.

Think of it as an e-post enabler, we can take print job on our website (or any application) to deliver printed pages (anywhere in the world) to the intended recipient of our user. All we have to do is setup print shops across the world with printers on IPP. As soon as an order is received, the print is fired.

We can authenticate and encrypt the print jobs to make IPP safer to use.

Must learn keyboard shortcuts

CTRL+C (Copy)

CTRL+X (Cut)

CTRL+V (Paste)

CTRL+Z (Undo)

DELETE (Delete)

SHIFT+DELETE (Delete the selected item permanently without placing the item in the Recycle Bin)

CTRL while dragging an item (Copy the selected item)

CTRL+SHIFT while dragging an item (Create a shortcut to the selected item)

F2 key (Rename the selected item)

CTRL+RIGHT ARROW (Move the insertion point to the beginning of the next word)

CTRL+LEFT ARROW (Move the insertion point to the beginning of the previous word)

CTRL+DOWN ARROW (Move the insertion point to the beginning of the next paragraph)

CTRL+UP ARROW (Move the insertion point to the beginning of the previous paragraph)

CTRL+SHIFT with any of the arrow keys (Highlight a block of text)

SHIFT with any of the arrow keys (Select more than one item in a window or on the desktop, or select text in a document)

CTRL+A (Select all)

F3 key (Search for a file or a folder)

ALT+ENTER (View the properties for the selected item)

ALT+F4 (Close the active item, or quit the active program)

ALT+ENTER (Display the properties of the selected object)

ALT+SPACEBAR (Open the shortcut menu for the active window)

CTRL+F4 (Close the active document in programs that enable you to have multiple documents open simultaneously)

ALT+TAB (Switch between the open items)

ALT+ ESC (Cycle through items in the order that they had been opened)

F6 key (Cycle through the screen elements in a window or on the desktop)

F4 key (Display the Address bar list in My Computer or Windows Explorer)

SHIFT+F10 (Display the shortcut menu for the selected item)

ALT+SPACEBAR (Display the System menu for the active window)

CTRL+ESC (Display the Start menu)

ALT+Underlined letter in a menu name (Display the corresponding menu)

Underlined letter in a command name on an open menu (Perform the corresponding command)

F10 key (Activate the menu bar in the active program)

RIGHT ARROW (Open the next menu to the right, or open a submenu)

LEFT ARROW (Open the next menu to the left, or close a submenu)

F5 key (Update the active window)

BACKSPACE (View the folder one level up in My Computer or Windows Explorer)

ESC (Cancel the current task)

SHIFT when you insert a CD-ROM into the CD-ROM drive (Prevent the CD-ROM from automatically playing)

Dialog Box Keyboard Shortcuts

CTRL+TAB (Move forward through the tabs)

CTRL+SHIFT+TAB (Move backward through the tabs)

TAB (Move forward through the options)

SHIFT+TAB (Move backward through the options)

ALT+Underlined letter (Perform the corresponding command or select the corresponding option)

ENTER (Perform the command for the active option or button)

SPACEBAR (Select or clear the check box if the active option is a check box)

Arrow keys (Select a button if the active option is a group of option buttons)

F1 key (Display Help)

F4 key (Display the items in the active list)

BACKSPACE (Open a folder one level up if a folder is selected in the Save As or Open dialog box)

Microsoft Natural Keyboard Shortcuts

Windows Logo (Display or hide the Start menu)

Windows Logo+BREAK (Display the System Properties dialog box)

Windows Logo+D (Display the desktop)

Windows Logo+M (Minimize all of the windows)

Windows Logo+SHIFT+M (Restore the minimized windows)

Windows Logo+E (Open My Computer)

Windows Logo+F (Search for a file or a folder)

CTRL+Windows Logo+F (Search for computers)

Windows Logo+F1 (Display Windows Help)

Windows Logo+ L (Lock the keyboard)

Windows Logo+R (Open the Run dialog box)

Windows Logo+U (Open Utility Manager)

Accessibility Keyboard Shortcuts

Right SHIFT for eight seconds (Switch FilterKeys either on or off)

Left ALT+left SHIFT+PRINT SCREEN (Switch High Contrast either on or off)

Left ALT +left SHIFT+NUM LOCK (Switch the MouseKeys either on or off)

SHIFT five times (Switch the StickyKeys either on or off)

NUM LOCK for five seconds (Switch the ToggleKeys either on or off)

Windows Logo +U (Open Utility Manager)

Windows Explorer Keyboard Shortcuts

END (Display the bottom of the active window)

HOME (Display the top of the active window)

NUM LOCK +Asterisk sign (*) (Display all of the subfolders that are under the selected folder)

NUM LOCK+Plus sign (+) (Display the contents of the selected folder)

NUM LOCK+Minus sign (-) (Collapse the selected folder)

LEFT ARROW (Collapse the current selection if it is expanded, or select the parent folder)

RIGHT ARROW (Display the current selection if it is collapsed, or select the first subfolder)

Shortcut Keys for Character Map

After you double-click a character on the grid of characters, you can move through the grid by using the keyboard shortcuts:

RIGHT ARROW (Move to the right or to the beginning of the next line)

LEFT ARROW (Move to the left or to the end of the previous line)

UP ARROW (Move up one row)

DOWN ARROW (Move down one row)

PAGE UP (Move up one screen at a time)

PAGE DOWN (Move down one screen at a time)

HOME (Move to the beginning of the line)

END (Move to the end of the line)

CTRL+HOME (Move to the first character)

CTRL+END (Move to the last character)

SPACEBAR (Switch between Enlarged and Normal mode when a character is selected)

Microsoft Management Console (MMC) Main Window Keyboard Shortcuts

CTRL+O (Open a saved console)

CTRL+N (Open a new console)

CTRL+S (Save the open console)

CTRL+M (Add or remove a console item)

CTRL+W (Open a new window)

F5 key (Update the content of all console windows)

ALT+SPACEBAR (Display the MMC window menu)

ALT+F4 (Close the console)

ALT+A (Display the Action menu)

ALT+V (Display the View menu)

ALT+F (Display the File menu)

ALT+O (Display the Favorites menu)

MMC Console Window Keyboard Shortcuts

CTRL+P (Print the current page or active pane)

ALT+Minus sign (-) (Display the window menu for the active console window)

SHIFT+F10 (Display the Action shortcut menu for the selected item)

F1 key (Open the Help topic, if any, for the selected item)

F5 key (Update the content of all console windows)

CTRL+F10 (Maximize the active console window)

CTRL+F5 (Restore the active console window)

ALT+ENTER (Display the Properties dialog box, if any, for the selected item)

F2 key (Rename the selected item)

CTRL+F4 (Close the active console window. When a console has only one console window, this shortcut closes the console)