How do we find installation directory for a server developed in java

[Naresh Agarwal]

Hi

I'm developing a server in Java. I need to read/write certain files in
my server code, for which I need the exact location of files.

In C++, normally this is achieved by having a system variable like
SERVER_HOME and using this variable in the code. This variable can be
set by Installer.

What is the way for achieving this in Java.

Also my server is actually a web-app which will run in some app
server.

thanks,
Naresh

[Nathan Zumwalt]

I've done similar things using properties files:

http://java.sun.com/j2se/1.4.1/docs/...roperties.html

Your installer can create a properties file in the user's home
directory (or some other well-known location) and then each time the
program starts up, it looks to that file.

Alternatively, you can set a Java system variable through the command
line that starts your application. For example, this set a variable
called 'fileLocation' to '/usr/local/random.conf':

java -DfileLocation=/usr/local/random.conf MyClassFile

Then, you access it your code using the System.getProperty(String)
method.

You would think Java would be able to interact with environment
variables, but I've never seen a clean way to do this.

-Nathan

na******@informatica.com (Naresh Agarwal) wrote in message news:<2b**************************@posting.google. com>...

Hi

I'm developing a server in Java. I need to read/write certain files in
my server code, for which I need the exact location of files.

In C++, normally this is achieved by having a system variable like
SERVER_HOME and using this variable in the code. This variable can be
set by Installer.

What is the way for achieving this in Java.

Also my server is actually a web-app which will run in some app
server.

thanks,
Naresh

[Phil...]

The reason java does not do anything with env variables
is that they are OS specific thus not portable which is a
java tenant.

"Nathan Zumwalt" <na*****@hotmail.com> wrote in message
news:52**************************@posting.google.c om...

I've done similar things using properties files:

http://java.sun.com/j2se/1.4.1/docs/...roperties.html

Your installer can create a properties file in the user's home
directory (or some other well-known location) and then each time the
program starts up, it looks to that file.

Alternatively, you can set a Java system variable through the command
line that starts your application. For example, this set a variable
called 'fileLocation' to '/usr/local/random.conf':

java -DfileLocation=/usr/local/random.conf MyClassFile

Then, you access it your code using the System.getProperty(String)
method.

You would think Java would be able to interact with environment
variables, but I've never seen a clean way to do this.

-Nathan

na******@informatica.com (Naresh Agarwal) wrote in message

news:<2b**************************@posting.google. com>...

Hi

I'm developing a server in Java. I need to read/write certain files in
my server code, for which I need the exact location of files.

In C++, normally this is achieved by having a system variable like
SERVER_HOME and using this variable in the code. This variable can be
set by Installer.

What is the way for achieving this in Java.

Also my server is actually a web-app which will run in some app
server.

thanks,
Naresh

[Phil...]

excuse my spelling, i meant tenent

"Phil..." <ry***@ieee.org> wrote in message
news:ACkcb.564637$YN5.399546@sccrnsc01...

The reason java does not do anything with env variables
is that they are OS specific thus not portable which is a
java tenant.

"Nathan Zumwalt" <na*****@hotmail.com> wrote in message
news:52**************************@posting.google.c om...

I've done similar things using properties files:

http://java.sun.com/j2se/1.4.1/docs/...roperties.html

Your installer can create a properties file in the user's home
directory (or some other well-known location) and then each time the
program starts up, it looks to that file.

Alternatively, you can set a Java system variable through the command
line that starts your application. For example, this set a variable
called 'fileLocation' to '/usr/local/random.conf':

java -DfileLocation=/usr/local/random.conf MyClassFile

Then, you access it your code using the System.getProperty(String)
method.

You would think Java would be able to interact with environment
variables, but I've never seen a clean way to do this.

-Nathan

na******@informatica.com (Naresh Agarwal) wrote in message

news:<2b**************************@posting.google. com>...

Hi

I'm developing a server in Java. I need to read/write certain files in
my server code, for which I need the exact location of files.

In C++, normally this is achieved by having a system variable like
SERVER_HOME and using this variable in the code. This variable can be
set by Installer.

What is the way for achieving this in Java.

Also my server is actually a web-app which will run in some app
server.

thanks,
Naresh