What is use of  Home BL methods

hi
i m new to EJB. Actually i want to know, is there any necessity of Home BL methods, as we have remote BL methods, which can provide the business services for us.

Home methods are useful if the business logic is not specific to an entity bean instance. For example, you can provide a home method that increments all employee's salary by a centain percentage (typically passed as argument to the business method).
On the other hand, the business logic that is part of the Component interface is typically specific to a paricular PK.

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  • Re: [iPlanet-JATO] Re: using begin childName Display method

    Steve,
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    craig
    stephen_winer wrote:
    I should clarify my earlier statement. The data I want to display is
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    Steve
    --- In iPlanet-JATO@y..., Belinda Garcia <belinda.garcia@s...> wrote:
    I don't currently use a begin or end Display method. I merely bind
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    Belinda
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    iPlanet-JATO-owner@y...
    Date: Mon, 17 Dec 2001 18:32:48 -0000
    Subject: [iPlanet-JATO] using begin<childName>Display method
    Content-Transfer-Encoding: 7bit
    I want to be able to conditionally show/hide data as well as
    format
    it for display without touching the model. I found the
    begin<childName>Display and end<childName>Display methods that
    provide the hooks to do this, but I have been unsuccessful in
    getting
    these method to execute. I added the
    fireChildDisplayEvents="true"
    attribute to the jato:useViewBean tag, but this has not helped.
    I
    also added some debug to the ContainerViewBase class in the
    public
    boolean beginChildDisplay(ChildDisplayEvent event) method to see
    what
    was happening. The displayMethodMap was returning null for the
    child
    display methods that were in the view bean. I covered all the
    bases
    (compiling, redeploying, etc.) and nothing has worked. Is there
    anything I am missing or is there some working example of this?
    Steve
    For more information about JATO, please visit:
    http://developer.iplanet.com/tech/appserver/framework/index.jsp
    >For more information about JATO, please visit:
    http://developer.iplanet.com/tech/appserver/framework/index.jsp

    The hidden field was present in the page, but it looked like this:
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    Steve
    --- Mike Frisino wrote:
    Steve,
    Can you check the HTML source that shows up in the browser? Do you see an entry that looks like this at the bottom of the form in
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    >
    <input type="hidden" name="jato.defaultCommand" value="/search">
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    see.
    >
    Failing this you can send me your jsp file , maybe there is some subtle issue there. michael.frisino@s...
    >
    >
    ----- Original Message -----
    From: stephen_winer
    Sent: Friday, December 07, 2001 8:05 AM
    Subject: [iPlanet-JATO] Using the defaultCommandChild in a form
    I am trying to set the defaultCommandChild in my jato:form tag to be
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    Steve
    For more information about JATO, please visit:
    http://developer.iplanet.com/tech/appserver/framework/index.jsp
    Service.
    >
    >
    >
    [Non-text portions of this message have been removed]

  • Re: [iPlanet-JATO] using begin childName Display method

    Oops. Sorry about that, Craig. I didn't realize I might leave that impression.
    I'm sure the tiled
    views work since you have so many examples of these and it's a relatively
    simple concept, isn't it?
    Not to mention a necessary one. I didn't have time to debug my code and find
    out what I was doing
    wrong where the tiled views are concerned. I decide to just try to implement
    tiled views later and
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    Yes, I have reviewed your comments and am taking them into consideration. I am
    able to save and
    retrieve values with my model at this point.
    Thanks.
    Belinda
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    From: "Craig V. Conover" <craig.conover@s...>
    X-Yahoo-Profile: cvconover
    Mailing-List: list [email protected]; contact
    [email protected]
    Date: Mon, 17 Dec 2001 13:00:10 -0800
    Subject: Re: [iPlanet-JATO] using begin<childName>Display method
    Content-Transfer-Encoding: 7bit
    Belinda,
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    craig
    Belinda Garcia wrote:
    I don't currently use a begin or end Display method. I merely bind the
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    value to what's in the model. I get nulls though if I try to use a tiledView. I
    haven't quite got this figured out.
    Belinda
    X-eGroups-Return:
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    X-Sender: stephen_winer@y...
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    From: "stephen_winer" <stephen_winer@y...>
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    X-Yahoo-Profile: stephen_winer
    Mailing-List: list [email protected]; contact
    [email protected]
    Date: Mon, 17 Dec 2001 18:32:48 -0000
    Subject: [iPlanet-JATO] using begin<childName>Display method
    Content-Transfer-Encoding: 7bit
    I want to be able to conditionally show/hide data as well as format
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    For more information about JATO, please visit:
    http://developer.iplanet.com/tech/appserver/framework/index.jsp
    For more information about JATO, please visit:
    http://developer.iplanet.com/tech/appserver/framework/index.jsp
    For more information about JATO, please visit:
    http://developer.iplanet.com/tech/appserver/framework/index.jsp

    The hidden field was present in the page, but it looked like this:
    <input type="hidden" name="jato.defaultCommand" value=""../search"">
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    it.
    Steve
    --- Mike Frisino wrote:
    Steve,
    Can you check the HTML source that shows up in the browser? Do you see an entry that looks like this at the bottom of the form in
    question?
    >
    <input type="hidden" name="jato.defaultCommand" value="/search">
    To answer your question - it should work as you described. Some of the JatoSample make use of the defaultCommandChild. Can you try
    running the sample BasicSample->Field Types and let us know what you
    see.
    >
    Failing this you can send me your jsp file , maybe there is some subtle issue there. michael.frisino@s...
    >
    >
    ----- Original Message -----
    From: stephen_winer
    Sent: Friday, December 07, 2001 8:05 AM
    Subject: [iPlanet-JATO] Using the defaultCommandChild in a form
    I am trying to set the defaultCommandChild in my jato:form tag to be
    the searcg button. The search button definition is:
    <jato:button name="search"/>.
    The form tag definition is:
    <jato:form name="PendingIA" defaultCommandChild="/search">
    Clicking on the search button works fine, but hitting return in one
    of the textFields (which submits the form) passes a value of "" to
    the createChild method in my viewBean, which throws an error. Why
    does this not just work as normal and trigger the handleSearchRequest
    () method?
    Steve
    For more information about JATO, please visit:
    http://developer.iplanet.com/tech/appserver/framework/index.jsp
    Service.
    >
    >
    >
    [Non-text portions of this message have been removed]

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    I changed the information in the batch file to match the jdk update and match the correct class directory. Upon double clicking the batch file, a NullPointerException was thrown.
    Jump ahead to my test program; DFTest.class. After creating several other test programs to try to isolate the cause of the exception, this is what I found:
    When I attempt to execute the following code (after successful compilation):
    application: DFTest.class
    import javax.swing.*;
    import BreezySwing.*;
    class DFTest extends GBFrame {
    JTextField txtFld = addTextField("abcdefg",1,1,1,1);
    DoubleField valueFld = addDoubleField(0.0 ,2,1,1,1);
    static public void main(String[] args){
    DFTest obj = new DFTest();
    obj.setSize(300,100);
    obj.setVisible(true);
    }My message is too long so I will continue...

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