jump into interface implementation in Eclipse IDE

Here's what I do:

• In the interface, move the cursor to the method name. Press F4. => Type Hierarchy view appears
• In the lower part of the view, the method should already be selected. In its toolbar, click "Lock view and show members in hierarchy" (should be the leftmost toolbar icon).
• In the upper part of the view, you can browse through all implementations of the method.

The procedure isn't very quick, but it gives you a good overview.

Press ctrl-t on the method name (rather than F3). This gives the type hierarchy as a pop-up so is slightly faster than using F4 and the type hierarchy view.

Also, when done on a method, subtypes that don't implement/override the method will be greyed out, and when you double click on a class in the list it will take you straight to the method in that class.

http://stackoverflow.com/questions/3255530/jump-into-interface-implementation-in-eclipse-ide

What is the difference between Serialization and Marshaling?

Marshaling and serialization are loosely synonymous in the context of remote procedure call, but semantically different as a matter of intent.

In particular, marshaling is about getting parameters from here to there, while serialization is about copying structured data to or from a primitive form such as a byte stream. In this sense, serialization is one means to perform marshaling, usually implementing pass-by-value semantics.

It is also possible for an object to be marshaled by reference, in which case the data "on the wire" is simply location information for the original object. However, such an object may still be amenable to value serialization.

As @Bill mentions, there may be additional metadata such as code base location or even object implementation code.

http://stackoverflow.com/questions/770474/what-is-the-difference-between-serialization-and-marshaling

Kill Processes using Command Prompt in Windows 7 | 8

If your Task Manager gets stuck or unresponsive due to intensive apps and you are not able to kill the particular process. What do u do ? You press ctrl alt delete to open up task manager and find the culprit. But you can kill also multiple processes using command prompt in Windows 7.

Kill Processes using Command Prompt in Windows 7 | 8

To do so, open the Command Prompt in the Administrative privileges mode and run the tasklistcommand, it will show you a list of all the running processes.



To views the processes, type Taskview and hit Enter.

To kill any particular process use the Taskkill command. For example to kill Chrome, run the command as:

Taskkill /IM chrome.exe /F

where /F is used to kill the process forcefully. You can also kill any particular process by using it’s ID, the tasklist command displays the process ID’s as well (you can see the PID column in the screenshot). To kill any process using it’s ID, run the command as:

Taskkill /PID 2704 /F

Now to kill multiple processes simultaneously, run the above command with the PID’s of all the processes followed by spaces

Taskkill /PID 2704 5472 4344 /F

That's it!

Last edited by knightrider™; 11-17-2009 at 11:25 AM.

http://forum.thewindowsclub.com/windows-tips-tutorials-articles/29463-kill-processes-using-command-prompt-windows-7-8-a.html

A cycle was detected in the build path of project xxx - Build Path Problem

Mark Circular dependcies as "Warning" in Eclipse tool to avoid "A CYCLE WAS DETECTED IN THE BUILD PATH" error. In Eclipse got to :-> Windows -> Prefereneces -> Java-> Compiler -> Buliding -> Circular Depencies

Thanks

http://stackoverflow.com/questions/1084866/a-cycle-was-detected-in-the-build-path-of-project-xxx-build-path-problem

MySQL Workbench – Error Code: 1175. You are using safe update mode

When you execute the update/delete request in MySQL workbench and you got the message error as:

You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column

And in MySQL Workbench also mention how we solve this issue as well by following message:

To disable safe mode, toggle the option in Preferences -> SQL Editor -> Query Editor and reconnect

Every found that kind of error when trying to update rows in MySQL? It’s because you tried to update a table without a WHERE that uses a KEY column. In my case, I don’t use even WHERE clause:

?

1 2 3

delete from order_detail;   delete from order;

Any way, the quick fix is to add SET SQL_SAFE_UPDATES=0; before your update/delete query.

?

1 2 3 4

SET SQL_SAFE_UPDATES=0; delete from order_detail;   delete from order;

Or follow what MySQL Workbench mentioned as here:

To disable safe mode, toggle the option in Preferences -> SQL Editor -> Query Editor and reconnect

Here is the screenshot in MySQL Workbench 5.2.40 CE

MySQL Workbench 5.2 – Error 1175

http://osify.com/2012/07/mysql-workbench-error-code-1175-you-are-using-safe-update-mode/#.UwySDvn6Kz4

Understanding domain objects/services

Different people use these terms in somewhat different ways, but here's my take:

1) "Business" and "domain" are roughly synonyms. "Domain" is a bit more general in that it doesn't make the assumption that you're writing a business application. So if we were writing a scientific app or a game, we might prefer to refer to the relevant part of the code as "domain" code rather than "business" code. So in the remainder of this explanation I'll use "domain" since it's more general.

2) "Domain logic" comprehends both "domain objects" and "domain services". For various reasons (technical and otherwise) many architectures employ a design where the domain logic is divided into objects for storing data ("domain objects") and objects that manipulate those ("domain services"). Martin Fowler and others have pointed out that that's not very OO since a big part of the OO concept is to put functionality together with data, and that's right, but it is what it is. Domain objects are the data and domain services are the do-stuff-with-the-data part.

3) In domain-driven design, the idea is to get back to true OO design, and so the various service methods make their way back to the domain objects so that you have objects in the OO sense rather than what are sometimes called "anemic" objects. In a DDD the domain objects themselves are more robust and so they form the domain logic. In reality there may still be some domain services too, but this is typically smaller in a DDD than in a more traditional domain objects vs. services model.

http://stackoverflow.com/questions/5589141/understanding-domain-objects-services

SQL SERVER – Stored Procedures Advantages and Best Advantage

There are many advantages of Stored Procedures. I was once asked what do I think is the most important feature of Stored Procedure? I have to pick only ONE. It is tough question.

I answered : Execution Plan Retention and Reuse (SP are compiled and their execution plan is cached and used again to when the same SP is executed again)

Not to mentioned I received the second question following my answer : Why? Because all the other advantage known (they are mentioned below) of SP can be achieved without using SP. Though Execution Plan Retention and Reuse can only be achieved using Stored Procedure only.

• Execution plan retention and reuse
• Query auto-parameterization
• Encapsulation of business rules and policies
• Application modularization
• Sharing of application logic between applications
• Access to database objects that is both secure and uniform
• Consistent, safe data modification
• Network bandwidth conservation
• Support for automatic execution at system start-up
• Enhanced hardware and software capabilities
• Improved security
• Reduced development cost and increased reliability
• Centralized security, administration, and maintenance for common routines

Reference : Pinal Dave (http://blog.SQLAuthority.com)

http://blog.sqlauthority.com/2007/04/13/sql-server-stored-procedures-advantages-and-best-advantage/

WAS v6.1.x fails to start with error ADMU7704E: Failed while trying to start the Windows Service

Technote (troubleshooting)

Problem(Abstract)

Attempts to start IBM WebSphere Application Server (WAS) v6.1.x through Rational Application Developer for WebSphere Software (RAD) v7.0.x results in the error ADMU7704E: Failed while trying to start the Windows Service associated with server.

Symptom

Complete error while starting WebSphere Application Server (WAS) v6.1.x:


ADMU7704E: Failed while trying to start the Windows Service associated with server: server1;
probable error executing WASService.exe: Starting Service: [service name]
Timed out waiting for service to respond to command, after 60 seconds.Failed to start service, or
timed out while waiting for start to complete. Check the logs for details.

Cause

The server was configured as a Windows Service.

Resolving the problem

If this was unintentional, create a new server profile that does not run the application as a Windows Service.

Steps describing how to do this can be found in the Related URL section.

Alternatively, you can do the following:

1. Open Windows Services Control Panel (Start > Settings > Control Panel > Administrative Tools > Services).
   
2. Look for the service name of WAS V6.1:
   
   "IBM WebSphere Application Server V6.1 - [service_name]".
   
3. Open a command window and go to [RAD_Installation]\runtimes\base_v61\bin
   
4. Run the command:
   
   WASService.exe -remove [service_name]
   
   You should see a message "Successfully removed service".

Restart RAD and you should now be able to successfully start your WASv6.1.x server.

Related information

Create WAS v6.1 Profile

http://www-01.ibm.com/support/docview.wss?uid=swg21368020

Java: iterate through HashMap [duplicate]

If you're only interested in the keys, you can iterate through the keySet() of the map:

Map<String, Object> map = ...;

for (String key : map.keySet()) {
    // ...
}

If you only need the values, use values():

for (Object value : map.values()) {
    // ...
}

Finally, if you want both the key and value, use entrySet():

for (Map.Entry<String, Object> entry : map.entrySet()) {
    String key = entry.getKey();
    Object value = entry.getValue();
    // ...
}

One caveat: if you want to remove items mid-iteration, you'll need to do so via an Iterator (see karim79's answer). However, changing item values is OK (see Map.Entry).

http://stackoverflow.com/questions/1066589/java-iterate-through-hashmap

Intrusion Detection FAQ: Mapping Active Ports To Corresponding Processes

Introduction

Our systems run many processes (services and applications) on a daily basis. Often these processes are designed for communication with remote systems and run as services that listen on assigned ports. In today's environment computers are often left powered on and connected to a network at all times.

This always-on mentality provides an endless window of opportunity for attackers to take advantage of vulnerabilities in these running processes. Therefore, it is important for us to not only keep our systems patched, it is also important to minimize the processes listening on our systems. We should only run processes that are necessary for the systems to function as desired, and disable and uninstall the other processes. But how do we tell what processes have ports open and are listening on our systems?

The Netstat Command

On systems that have TCP/IP installed (which includes almost all systems), there is a command called Netstat. Netstat is a command line executable that can be used to display various types of information about out network connections. If you run netstat with a command line option of "-?" you will see that there are various command line arguments you can use to gather different pieces of information. We can use Netstat to display a list of active connections for our system.

If we run the Netstat command from a Command Prompt on a Windows system, we get results similar to the following (results from a Windows 7 system):

C:\>netstat.exe -aon

Active Connections

Proto	Local Address	Foreign Address	State	PID
TCP	0.0.0.0:135	0.0.0.0:0	LISTENING	668
TCP	0.0.0.0:445	0.0.0.0:0	LISTENING	4
TCP	0.0.0.0:5357	0.0.0.0:0	LISTENING	4
TCP	0.0.0.0:49152	0.0.0.0:0	LISTENING	392
TCP	0.0.0.0:49153	0.0.0.0:0	LISTENING	716
TCP	0.0.0.0:49154	0.0.0.0:0	LISTENING	884
TCP	0.0.0.0:49155	0.0.0.0:0	LISTENING	468
TCP	0.0.0.0:49156	0.0.0.0:0	LISTENING	476
TCP	192.168.56.129:139	0.0.0.0:0	ISTENING	4
TCP	192.168.56.129:49158	65.55.17.26:80	ESTABLISHED	2988
TCP	192.168.56.129:49160	204.246.230.80:80	ESTABLISHED	2988
TCP	192.168.56.129:49161	65.55.15.242:80	ESTABLISHED	2988
TCP	192.168.56.129:49162	65.55.149.121:80	ESTABLISHED	2988
TCP	192.168.56.129:49163	65.55.15.242:80	ESTABLISHED	2988
TCP	192.168.56.129:49164	65.55.15.242:80	ESTABLISHED	2988
TCP	192.168.56.129:49167	65.55.15.242:80	ESTABLISHED	2988
TCP	192.168.56.129:49168	65.55.15.242:80	ESTABLISHED	2988
TCP	192.168.56.129:49169	65.55.15.242:80	ESTABLISHED	2988
TCP	192.168.56.129:49172	74.125.95.149:80	ESTABLISHED	2988
TCP	192.168.56.129:49174	204.246.230.113:80	ESTABLISHED	2988
TCP	192.168.56.129:49175	65.55.149.119:80	ESTABLISHED	2988
TCP	192.168.56.129:49177	66.35.45.201:80	ESTABLISHED	2988
TCP	192.168.56.129:49178	66.35.45.201:80	ESTABLISHED	2988
TCP	192.168.56.129:49179	66.35.45.201:80	ESTABLISHED	2988
TCP	192.168.56.129:49180	66.35.45.201:80	ESTABLISHED	2988
TCP	192.168.56.129:49181	66.35.45.201:80	ESTABLISHED	2988
TCP	192.168.56.129:49182	66.35.45.201:80	ESTABLISHED	2988
TCP	[::]:135	[::]:0	LISTENING	668
TCP	[::]:445	[::]:0	LISTENING	4
TCP	[::]:5357	[::]:0	LISTENING	4
TCP	[::]:49152	[::]:0	LISTENING	392
TCP	[::]:49153	[::]:0	LISTENING	716
TCP	[::]:49154	[::]:0	LISTENING	884
TCP	[::]:49155	[::]:0	LISTENING	468
TCP	[::]:49156	[::]:0	LISTENING	476
UDP	0.0.0.0:3702	*:*		1412
UDP	0.0.0.0:3702	*:*		1412
UDP	0.0.0.0:5355	*:*		1164
UDP	0.0.0.0:64181	*:*		1412
UDP	127.0.0.1:1900	*:*		1412
UDP	127.0.0.1:61166	*:*		1412
UDP	127.0.0.1:62646	*:*		2988
UDP	192.168.56.129:137	*:*		4
UDP	192.168.56.129:138	*:*		4
UDP	192.168.56.129:1900	*:*		1412
UDP	192.168.56.129:61165	*:*		1412
UDP	[::]:3702	*:*		1412
UDP	[::]:3702	*:*		1412
UDP	[::]:5355	*:*		1164
UDP	[::]:64182	*:*		1412
UDP	[::1]:1900	*:*		1412
UDP	[::1]:61164	*:*		1412
UDP	[fe80::a49d:22fc:6a6:4daf%11]:546	*:*		716
UDP	[fe80::a49d:22fc:6a6:4daf%11]:1900	*:*		1412
UDP	[fe80::a49d:22fc:6a6:4daf%11]:61163	*:*		1412

As you can see there are many processes listening on this Windows 7 system. By running the netstat command with the "a" option, we list all the active TCP connections on TCP and UDP ports. The "o" option gives us the process identifier, or PID, of the process the port is assigned. And the "n" option tells netstat not to do name resolution on IP addresses or ports.

This netstat output gives us five columns of information about active connections:

Column	Information Description
Proto	Type of protocol being used TCP or UDP.
Local Address	IP address of the local system and local port being used.
Foreign Address	IP address of the remote system and remote port being used.
State	Status of the TCP connection.
PID	Process identifier of the processing using the local port.

If we look at the 22nd entry of our output, we see the following entry:

   TCP   192.168.56.129:49177   66.35.45.201:80   ESTABLISHED   2988

This entry tells us we have an active TCP connection from our local system on port 49177 to a remote system with IP address 66.35.45.201 on port 80. In addition, this connection is currently established and a local process with a PID of 2988 is using the connection.

Even though we know the PID of the process using this connection, it doesn't tell us much more than there is a process that has an active connection on our system. How can we use this information to determine more about PID 2988?

Using Task Manager to better identify processes against our Netstat results

Now that we have a PID number, we can look up the process that is associated with the PID. To do this we can utilize the built-in Task Manager. However, by default Task Manager doesn't display the PID. We can fix that with a quick setting change.

Open Task Manager and select the "Processes" tab. Then click "Show processes from all users" to display all running processes in the Task Manager window. We will need to add the "PID (Process Identifier)" column to the view, as show below.

To do this, select "View" from the menu and then click "Select Columns". On the "Select Process Page Columns" make sure there is a check mark in "PID (Process Identifier)" selection box and then click OK.

You will now see a window similar to the following.

If we look in the "PID" column, we will see our PID of 2988. Then by looking at the "Image Name" and "Description" columns, we can see that out active network connection is Internet Explorer.

Now that we have looked at the harder way of cross referencing active ports to their processes, let's look at a tool that can help do this all in one step.

TCPView for Windows

Windows SysInternals' guru Mark Russinovich has created a very useful tool, amongst many others, that will make our job easier. The TCPView tool is a GUI program that provides similar, but enhanced, information to that of Netstat. It will not only give you the PID number of the process tied to an active port, it will also provide you the "Image Name" that you find in Task Manager.

TCPView also includes a command line program that can dump the same information as the GUI program. This comes in very handy when performing Incident Response or you want to automate the auditing of several systems. The command line program is called Tcpvcon and has a few command line arguments. You can run "tcpvcon.exe /?" from a command prompt to view those options.

TCPView Output

On our same Windows 7 system, we run the Tcpvcon program at the command line while specifying the "a", "c" and "n" options. The command gives us the following results (which can also be piped to a file on a remote network share):

C:\>Tcpvcon.exe -acn

TCPView v2.54 - TCP/UDP endpoint viewer

Copyright (C) 1998-2009 Mark Russinovich

Sysinternals - www.sysinternals.com

TCP,svchost.exe,668,LISTENING,0.0.0.0:135,0.0.0.0:0
TCP,System,4,LISTENING,192.168.56.129:139,0.0.0.0:0
TCP,wininit.exe,392,LISTENING,0.0.0.0:49152,0.0.0.0:0
TCP,svchost.exe,716,LISTENING,0.0.0.0:49153,0.0.0.0:0
TCP,svchost.exe,884,LISTENING,0.0.0.0:49154,0.0.0.0:0
TCP,services.exe,468,LISTENING,0.0.0.0:49155,0.0.0.0:0
TCP,lsass.exe,476,LISTENING,0.0.0.0:49156,0.0.0.0:0
TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49158,65.55.17.26:80

TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49160,204.246.230.80:80
TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49161,65.55.15.242:80
TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49162,65.55.149.121:80
TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49163,65.55.15.242:80
TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49164,65.55.15.242:80
TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49167,65.55.15.242:80
TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49168,65.55.15.242:80
TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49169,65.55.15.242:80
TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49172,74.125.95.149:80

TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49174,204.246.230.113:80
TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49175,65.55.149.119:80
TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49177,66.35.45.201:80
TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49178,66.35.45.201:80
TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49179,66.35.45.201:80
TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49180,66.35.45.201:80
TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49181,66.35.45.201:80
TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49182,66.35.45.201:80
TCP,System,4,LISTENING,0.0.0.0:445,0.0.0.0:0

TCP,System,4,LISTENING,0.0.0.0:5357,0.0.0.0:0
UDP,System,4,*,192.168.56.129:137,*:*
UDP,System,4,*,192.168.56.129:138,*:*
UDP,svchost.exe,1412,*,127.0.0.1:1900,*:*
UDP,svchost.exe,1412,*,192.168.56.129:1900,*:*
UDP,svchost.exe,1412,*,0.0.0.0:3702,*:*
UDP,svchost.exe,1412,*,0.0.0.0:3702,*:*
UDP,svchost.exe,1164,*,0.0.0.0:5355,*:*
UDP,svchost.exe,1412,*,192.168.56.129:61165,*:*

UDP,svchost.exe,1412,*,127.0.0.1:61166,*:*
UDP,iexplore.exe,2988,*,127.0.0.1:62646,*:*
UDP,svchost.exe,1412,*,0.0.0.0:64181,*:*
TCPV6,svchost.exe,668,LISTENING,[0:0:0:0:0:0:0:0]:135,[0:0:0:0:0:0:0:0]:0
TCPV6,System,4,LISTENING,[0:0:0:0:0:0:0:0]:445,[0:0:0:0:0:0:0:0]:0
TCPV6,System,4,LISTENING,[0:0:0:0:0:0:0:0]:5357,[0:0:0:0:0:0:0:0]:0
TCPV6,wininit.exe,392,LISTENING,[0:0:0:0:0:0:0:0]:49152,[0:0:0:0:0:0:0:0]:0
TCPV6,svchost.exe,716,LISTENING,[0:0:0:0:0:0:0:0]:49153,[0:0:0:0:0:0:0:0]:0
TCPV6,svchost.exe,884,LISTENING,[0:0:0:0:0:0:0:0]:49154,[0:0:0:0:0:0:0:0]:0

TCPV6,services.exe,468,LISTENING,[0:0:0:0:0:0:0:0]:49155,[0:0:0:0:0:0:0:0]:0
TCPV6,lsass.exe,476,LISTENING,[0:0:0:0:0:0:0:0]:49156,[0:0:0:0:0:0:0:0]:0
UDPV6,svchost.exe,1412,*,[0:0:0:0:0:0:0:1]:1900,*:*
UDPV6,svchost.exe,1412,*,[fe80:0:0:0:a49d:22fc:6a6:4daf]:1900,*:*
UDPV6,svchost.exe,1412,*,[0:0:0:0:0:0:0:0]:3702,*:*
UDPV6,svchost.exe,1412,*,[0:0:0:0:0:0:0:0]:3702,*:*
UDPV6,svchost.exe,1164,*,[0:0:0:0:0:0:0:0]:5355,*:*
UDPV6,svchost.exe,1412,*,[fe80:0:0:0:a49d:22fc:6a6:4daf]:61163,*:*
UDPV6,svchost.exe,1412,*,[0:0:0:0:0:0:0:1]:61164,*:*
UDPV6,svchost.exe,1412,*,[0:0:0:0:0:0:0:0]:64182,*:*

Our output is in comma separated format due to the "c" option we specified. As with Netstat the "a" option gives us all connections and the "n" option tells Tcpvcon to not do name translation. This time, the output from our command is displayed in six columns, or fields, that are comma separated. The displayed fields provide the following information in order displayed:

Column/Field	Description
Protocol	Type of protocol being used TCP or UDP.
Process	The Image Name of the running process.
PID	Process identifier of the processing using the local port.
State	Status of the TCP connection.
Local address and port	IP address of the local system and local port being used.
Foreign address and port	IP address of the remote system and remote port being used.

Let's look at the 20th entry in our output list from the Tcpvcon command we ran above:

   TCP,iexplore.exe,2988,ESTABLISHED,192.168.56.129:49177,66.35.45.201:80

As before, this entry tells us we have an active TCP connection from our local system on port 49177 to a remote system with IP address 66.35.45.201 on port 80. And this connection is currently established and a local process with a PID of 2988 is using the connection. But as a bonus, the process image name (iexplore.exe) is now provided.

Resources

Microsoft Technet (n.d.). Netstat. Retrieved from http://technet.microsoft.com/en-us/library/bb490947.aspx

Russinovich, M. (2009, March 17). Tcpview for windows v2.54. Retrieved from http://technet.microsoft.com/en-us/sysinternals/bb897437.aspx

http://www.sans.org/security-resources/idfaq/mapping-ports.php