Re: Configuration for Action
Hello Craig,
First option turns out to be a great way to store
initialization parameters that are shared by many
actions. In this case what name convention should
be adopted?
Best of luck,
Yuriy Zubarev
--- Craig R. McClanahan [EMAIL PROTECTED] wrote:
First, one approach is to use servlet initialization parameters, and
adopt
the convention that the names of parameters for a specific action start
with the fully qualified class name of that action.
Second, if you only need *one* configuration parameter, there is a
general
purpose property of an ActionMapping called parameter (with accessor
methods getParameter() and setParameter()) that you can use for this
purpose.
Third, there is a way to store Action-specific configuration information
in struts-config.xml. It's a little involved, but goes basically like
this:
* Write your own subclass of ActionMapping that includes the extra
properties you are interested in. You can do individual subclasses
for each different action, or a class that includes all the custom
properties you might want for any action.
* Modify your action entries in two respects:
- Tell Struts to use your ActionMapping subclass instead of the
standard one.
- Configure the extra parameters with set-property elements
action path=/myaction
className=com.mycompany.MyActionMapping
type=com.mycompany.MyAction
...
set-property property=foo value=Value for property foo/
set-property property=bar value=Value for property bar/
/action
* In your Action, cast the mapping you receive to your own class
so you can access these extra properties:
public ActionForward perform(...) {
MyActionMapping myMapping = (MyActionMapping) mapping;
String foo = myMapping.getFoo();
String bar = myMapping.getBar();
... use foo and bar to modify the behavior ...
}
Craig McClanahan
On Thu, 21 Jun 2001, Yuriy Zubarev wrote:
Hello everybody,
While working directly with servlets, in configuration
file you can specify initial valus of parameters for a servlet
in the following way:
init-param
param-name
parameter
/param-name
param-value
value
/param-value
/init-param
And you can easily get those values without resorting to
parse information on your own.
So I was wondering if it's possible to make such a
thing with actions in struts-config.xml file.
In another words I would like to have some custom
parameters for some actions with handy means of
extracting those parameters.
Thank you for your time.
Best of luck,
Yuriy Zubarev
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Re: Configuration for Action
On Fri, 22 Jun 2001, Yuriy Zubarev wrote:
Hello Craig,
First option turns out to be a great way to store
initialization parameters that are shared by many
actions. In this case what name convention should
be adopted?
For options that are specific to a particular Action class (say,
com.mycompany.mypackage.MyAction), I would use names like:
com.mycompany.mypackage.MyAction.foo
for the foo parameter.
For initialization parameters shared by a number of different actions,
presumably the actions are related to each other. Therefore, you might
place them all in the same Java package, and use the package name as the
prefix (so the foo parameter shared by all actions in the package might
be named com.mycompany.mypackage.foo instead).
From a technical perspective, it really does not matter what convention
you adopt. However, using rules like this accomplish two good things:
* Avoids the potential for name clashes where more than one Action
has a parameter named foo.
* Makes the complete parameter name predictable, to reduce
mistakes.
Best of luck,
Yuriy Zubarev
Craig
--- Craig R. McClanahan [EMAIL PROTECTED] wrote:
First, one approach is to use servlet initialization parameters, and
adopt
the convention that the names of parameters for a specific action start
with the fully qualified class name of that action.
Second, if you only need *one* configuration parameter, there is a
general
purpose property of an ActionMapping called parameter (with accessor
methods getParameter() and setParameter()) that you can use for this
purpose.
Third, there is a way to store Action-specific configuration information
in struts-config.xml. It's a little involved, but goes basically like
this:
* Write your own subclass of ActionMapping that includes the extra
properties you are interested in. You can do individual subclasses
for each different action, or a class that includes all the custom
properties you might want for any action.
* Modify your action entries in two respects:
- Tell Struts to use your ActionMapping subclass instead of the
standard one.
- Configure the extra parameters with set-property elements
action path=/myaction
className=com.mycompany.MyActionMapping
type=com.mycompany.MyAction
...
set-property property=foo value=Value for property foo/
set-property property=bar value=Value for property bar/
/action
* In your Action, cast the mapping you receive to your own class
so you can access these extra properties:
public ActionForward perform(...) {
MyActionMapping myMapping = (MyActionMapping) mapping;
String foo = myMapping.getFoo();
String bar = myMapping.getBar();
... use foo and bar to modify the behavior ...
}
Craig McClanahan
On Thu, 21 Jun 2001, Yuriy Zubarev wrote:
Hello everybody,
While working directly with servlets, in configuration
file you can specify initial valus of parameters for a servlet
in the following way:
init-param
param-name
parameter
/param-name
param-value
value
/param-value
/init-param
And you can easily get those values without resorting to
parse information on your own.
So I was wondering if it's possible to make such a
thing with actions in struts-config.xml file.
In another words I would like to have some custom
parameters for some actions with handy means of
extracting those parameters.
Thank you for your time.
Best of luck,
Yuriy Zubarev
__
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Configuration for Action
Hello everybody, While working directly with servlets, in configuration file you can specify initial valus of parameters for a servlet in the following way: init-param param-name parameter /param-name param-value value /param-value /init-param And you can easily get those values without resorting to parse information on your own. So I was wondering if it's possible to make such a thing with actions in struts-config.xml file. In another words I would like to have some custom parameters for some actions with handy means of extracting those parameters. Thank you for your time. Best of luck, Yuriy Zubarev __ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/
Re: Configuration for Action
If your running in a J2EE container, you could always shove the entries into
the environment. Then you could look them up like:
try
{
InitialContext ic = new InitialContext();
Object myparm = ic.lookup(the/jndi/name/of/your/parameter);
}
catch (javax.naming.NamingException ex)
{
//uh oh, error
}
- Original Message -
From: Yuriy Zubarev [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Thursday, June 21, 2001 2:09 PM
Subject: Configuration for Action
Hello everybody,
While working directly with servlets, in configuration
file you can specify initial valus of parameters for a servlet
in the following way:
init-param
param-name
parameter
/param-name
param-value
value
/param-value
/init-param
And you can easily get those values without resorting to
parse information on your own.
So I was wondering if it's possible to make such a
thing with actions in struts-config.xml file.
In another words I would like to have some custom
parameters for some actions with handy means of
extracting those parameters.
Thank you for your time.
Best of luck,
Yuriy Zubarev
__
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http://personal.mail.yahoo.com/
Re: Configuration for Action
Mike,
Thanks for reply. But what if my servlet container is Tomcat?
And I would like to ask people how they store and retrieve
values needed to run web-apllication in genereal (except db
processing). For example, many of my actions require unique parameters,
but some share the configuration. I'm just looking for an easy way to
adopt.
Thank yo for your time.
Best of luck,
Yuriy Zubarev
--- Mike Thompson [EMAIL PROTECTED] wrote:
If your running in a J2EE container, you could always shove the entries
into
the environment. Then you could look them up like:
try
{
InitialContext ic = new InitialContext();
Object myparm = ic.lookup(the/jndi/name/of/your/parameter);
}
catch (javax.naming.NamingException ex)
{
//uh oh, error
}
- Original Message -
From: Yuriy Zubarev [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Thursday, June 21, 2001 2:09 PM
Subject: Configuration for Action
Hello everybody,
While working directly with servlets, in configuration
file you can specify initial valus of parameters for a servlet
in the following way:
init-param
param-name
parameter
/param-name
param-value
value
/param-value
/init-param
And you can easily get those values without resorting to
parse information on your own.
So I was wondering if it's possible to make such a
thing with actions in struts-config.xml file.
In another words I would like to have some custom
parameters for some actions with handy means of
extracting those parameters.
Thank you for your time.
Best of luck,
Yuriy Zubarev
__
Do You Yahoo!?
Get personalized email addresses from Yahoo! Mail
http://personal.mail.yahoo.com/
__
Do You Yahoo!?
Get personalized email addresses from Yahoo! Mail
http://personal.mail.yahoo.com/
Re: Configuration for Action
First, one approach is to use servlet initialization parameters, and adopt
the convention that the names of parameters for a specific action start
with the fully qualified class name of that action.
Second, if you only need *one* configuration parameter, there is a general
purpose property of an ActionMapping called parameter (with accessor
methods getParameter() and setParameter()) that you can use for this
purpose.
Third, there is a way to store Action-specific configuration information
in struts-config.xml. It's a little involved, but goes basically like
this:
* Write your own subclass of ActionMapping that includes the extra
properties you are interested in. You can do individual subclasses
for each different action, or a class that includes all the custom
properties you might want for any action.
* Modify your action entries in two respects:
- Tell Struts to use your ActionMapping subclass instead of the
standard one.
- Configure the extra parameters with set-property elements
action path=/myaction
className=com.mycompany.MyActionMapping
type=com.mycompany.MyAction
...
set-property property=foo value=Value for property foo/
set-property property=bar value=Value for property bar/
/action
* In your Action, cast the mapping you receive to your own class
so you can access these extra properties:
public ActionForward perform(...) {
MyActionMapping myMapping = (MyActionMapping) mapping;
String foo = myMapping.getFoo();
String bar = myMapping.getBar();
... use foo and bar to modify the behavior ...
}
Craig McClanahan
On Thu, 21 Jun 2001, Yuriy Zubarev wrote:
Hello everybody,
While working directly with servlets, in configuration
file you can specify initial valus of parameters for a servlet
in the following way:
init-param
param-name
parameter
/param-name
param-value
value
/param-value
/init-param
And you can easily get those values without resorting to
parse information on your own.
So I was wondering if it's possible to make such a
thing with actions in struts-config.xml file.
In another words I would like to have some custom
parameters for some actions with handy means of
extracting those parameters.
Thank you for your time.
Best of luck,
Yuriy Zubarev
__
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