Why do Servlet exists when there are JSP's ?

Hi !
I am wondering for quite a few days now , why do servlet exist , jsp's can do all the things which a servlet can do and JSP's are yet easier to embed HTML tags etc.
Please throw some light on the matter as i feel that i am missing a major difference.
Best Regards
Rajarshi.

beacuse servlets first came into existence and then jsp's.Exactly.
Servlets were developed first.
It was then discovered how much of a pain it was in a servlet to debug/change HTML - everything had to be in an out.println() statement();
That made it very difficult to do complex HTML - and impossible to use any tools with.
JSP turned it around so it wasn't java code creating HTML, but rather an HTML page that runs some java code. It then went too far down that path, as JSPs don't support all the syntax/type checking that a compiler provides in a servlet.
Also reading a page which is a mix between HTML and java scriptlet code is very difficult.
Enter tag libraries, which take the java code back OUT of the jsp pages, replacing it with stuff that looks like HTML tags.
Enter frameworks like Struts/Tapestry/JSF which leverage design of web applications.
This is an evolving technology. The next generation learns from the mistakes/shortcomings of the previous, and gradually becomes easier.
What will be the next step? Who knows?

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Avoid marking files as modified by Git when there are no changes

Hello,
I am working on a project using Visual Studio 2013 Ultimate and Enterprise Architect 9.0 (a UML tool). I am using Git for Source Control in Visual Studio.
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Hi,
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Regards,
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Merci de bien vouloir "Marquer comme réponse", les réponses qui ont répondues à votre question, et de noter les réponses que vous avez trouvé utiles.

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Why can't you use the Weblogic startup class to start your
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What version of Weblogic Server are you running ?

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Hi all,
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Synonym will be validated when it is accessed, no need to take an action.

What does the message "Commit can be issued only when there are no requests awaiting responses" mean ?

Can someone explain what this message is, and what the reason could be for
          the java.lang.IllegalStateException.
          When such an error is encountered, how can I find out what the
          "RepliesOwedMe" are. The complete exception is as follows
          Any quick hint is greately appriciated
          Thanks
          asankha
          <Sep 6, 2001 12:49:18 PM GMT+06:00> <Error> <EJB> <Exception during commit
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          n=(IdHash=8297169,Name = [EJB
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          liesOwedMe=2,numRepliesOwedOthers=0,seconds since begin=0,seconds
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          c.jdbc.jts.Connection]=(state=suspended,assigned=none),SCInfo[myserver]=(sta
          te=active),properties=({
          weblogic.transaction.name=[EJB CActionBeanImpl.execute()],
          weblogic.jdbc=t3://10.2.1.133:7001, weblo
          gic.debug.DebugContext=weblogic.utils.DebugContext@662250})):
          java.lang.IllegalStateException: Commi
          t can be issued only when there are no requests awaiting responses.
          Currently there are 2 such reque
          sts. xid = 3:c56b8ee8f6114598, status = Active
          at
          weblogic.transaction.internal.TransactionImpl.throwIllegalStateException(Tra
          nsactionImpl.
          java:1272)
          at
          weblogic.transaction.internal.TransactionImpl.checkIfCommitPossible(Transact
          ionImpl.java:
          1206)
          at
          weblogic.transaction.internal.ServerTransactionImpl.commit(ServerTransaction
          Impl.java:162
          at
          weblogic.ejb20.internal.BaseEJBObject.postInvoke(BaseEJBObject.java:201)
          at
          com.edocs.wb.web.action.CActionBeanEOImpl.execute(CActionBeanEOImpl.java:37)
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          at CeaMarketMainServlet.doPost(CeaMarketMainServlet.java:312)
          at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
          at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
          at
          weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
          :213)
          at
          weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo
          ntext.java:12
          65)
          at
          weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java
          :1631)
          at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:137)
          at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
          >


          This means that the transaction initiator has not received replies for some of
          the transactional requests when the transaction commits, i.e. the checked transaction
          behavior is violated. WLS TM enforces checked transaction behavior to make sure
          that all work done in the transaction context will be completed before transaction
          is committed. If it cannot make such guarantee due to outstanding replies, it
          aborts the commit right away.
          Currently, there is no provisions for dumping the requests whose replies are still
          pending.
          I would suggest you report to BEA support: [email protected]
          Regards,
          Priscilla
          "Asankha C. Perera" <[email protected]> wrote:
          >Can someone explain what this message is, and what the reason could be
          >for
          >the java.lang.IllegalStateException.
          >
          >When such an error is encountered, how can I find out what the
          >"RepliesOwedMe" are. The complete exception is as follows
          >
          >Any quick hint is greately appriciated
          >Thanks
          >asankha
          >
          ><Sep 6, 2001 12:49:18 PM GMT+06:00> <Error> <EJB> <Exception during commit
          >of transaction transactio
          >n=(IdHash=8297169,Name = [EJB
          >CActionBeanImpl.execute()],Xid=3:c56b8ee8f6114598,Status=Active,numRep
          >liesOwedMe=2,numRepliesOwedOthers=0,seconds since begin=0,seconds
          >left=29,ServerResourceInfo[weblogi
          >c.jdbc.jts.Connection]=(state=suspended,assigned=none),SCInfo[myserver]=(sta
          >te=active),properties=({
          >weblogic.transaction.name=[EJB CActionBeanImpl.execute()],
          >weblogic.jdbc=t3://10.2.1.133:7001, weblo
          >gic.debug.DebugContext=weblogic.utils.DebugContext@662250})):
          >java.lang.IllegalStateException: Commi
          >t can be issued only when there are no requests awaiting responses.
          >Currently there are 2 such reque
          >sts. xid = 3:c56b8ee8f6114598, status = Active
          > at
          >weblogic.transaction.internal.TransactionImpl.throwIllegalStateException(Tra
          >nsactionImpl.
          >java:1272)
          > at
          >weblogic.transaction.internal.TransactionImpl.checkIfCommitPossible(Transact
          >ionImpl.java:
          >1206)
          > at
          >weblogic.transaction.internal.ServerTransactionImpl.commit(ServerTransaction
          >Impl.java:162
          >)
          > at
          >weblogic.ejb20.internal.BaseEJBObject.postInvoke(BaseEJBObject.java:201)
          > at
          >com.edocs.wb.web.action.CActionBeanEOImpl.execute(CActionBeanEOImpl.java:37)
          > at CeaMarketMainServlet.doGet(CeaMarketMainServlet.java:185)
          > at CeaMarketMainServlet.doPost(CeaMarketMainServlet.java:312)
          > at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
          > at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
          > at
          >weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
          >:213)
          > at
          >weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo
          >ntext.java:12
          >65)
          > at
          >weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java
          >:1631)
          > at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:137)
          > at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
          >>
          >
          >

How to change the default JRE when there are several version of JRE in Sys

How to change the default JRE when there are several version of JRE in System?
i have installed j2sdk1.5.0 then installed j2ee1.4,then installed Weblogic6.1 which use jdk1.3
Now the JRE is jdk1.3\bin
When run class that was compiled with jdk1.5,throw:
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There is a workaround to move from 1.5 version to the older 1.4 version. But this could be specific to the browser setting the JRE version.
Excerpts from sun docs:
However, a user can still run older versions. To do so, launch the Java Plug-in Control Panel for the older version, then (re)select the browser in the Browser tab.
Example:
Assume you are running on Microsoft Windows with Microsoft Internet Explorer, have first installed version 1.4.2, then version 5.0, and you want to run 1.4.2.
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If Microsoft Internet Explorer is shown as checked, uncheck it and click Apply. You will see a confirmation dialog stating that browser settings have changed.
Check Microsoft Internet Explorer and click Apply. You should see a confirmation dialog.
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Details are here
http://java.sun.com/j2se/1.5.0/docs/guide/deployment/deployment-guide/jcp.html
My system (Windows XP) has the version 1.5_09 set as the default. However i just installed JRE 1.5_06 and would like to revert back to _06 as the default JRE..
Will update if i find more information

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Hi,
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After several years of use very satisfied with Firefox, recently loaded version (4.0.1) severely slows my browsing, and even my system, especially when there are pictures or videos. I said that this was not the case before and my system is Windows XP SP3.

After several years of use very satisfied with Firefox, recently loaded version (4.0.1) severely slows my browsing, and even my system, especially when there are pictures or videos. I said that this was not the case before and my system is Windows XP SP3.

I have had a similar problem with my system. I just recently (within a week of this post) built a brand new desktop. I installed Windows 7 64-bit Home and had a clean install, no problems. Using IE downloaded an anti-virus program, and then, because it was the latest version, downloaded and installed Firefox 4.0. As I began to search the internet for other programs to install after about maybe 10-15 minutes my computer crashes. Blank screen (yet monitor was still receiving a signal from computer) and completely frozen (couldn't even change the caps and num lock on keyboard). I thought I perhaps forgot to reboot after an update so I did a manual reboot and it started up fine.
When ever I got on the internet (still using firefox) it would crash after anywhere between 5-15 minutes. Since I've had good experience with FF in the past I thought it must be either the drivers or a hardware problem. So in-between crashes I updated all the drivers. Still had the same problem. Took the computer to a friend who knows more about computers than I do, made sure all the drivers were updated, same problem. We thought that it might be a hardware problem (bad video card, chipset, overheating issues, etc.), but after my friend played around with my computer for a day he found that when he didn't start FF at all it worked fine, even after watching a movie, or going through a playlist on Youtube.
At the time of this posting I'm going to try to uninstall FF 4.0 and download and install FF 3.6.16 which is currently on my laptop and works like a dream. Hopefully that will do the trick, because I love using FF and would hate to have to switch to another browser. Hopefully Mozilla will work out the kinks with FF 4 so I can continue to use it.
I apologize for the lengthy post. Any feedback would be appreciated, but is not necessary. I will try and post back after I try FF 3.16.6.

Joining 2 related records using PL SQL in Apex - Problems when there are more than 2 related records?

Hi
I am combining 2 related records of legacy data together that make up a marriage record. I am doing this in APEX using a before header process using the following code below which works well when there are only 2 related records which joins the bride and groom record together on screen in apex. I have appended a field called principle which is set to 'Y' for the groom and 'N' for the bride to this legacy data
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How can I adapt the script below so that if there are more than 2 records that match the entry and book values then it will display a message or is there a better possible work around? Cleaning the data would be not an option as there are thousands of rows of where these occurrences occur
declare
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     is
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          and    mar.book = b_book
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begin
open c_mar_principle(:p16_entry,:p16_book) ;
fetch c_mar_principle into rec;
:P16_SURNAME_GROOM   := rec.surname;
:P16_FORNAME_GROOM   := rec.forename;
               :P16_ENTRY := rec.entry;
               :P16_BOOK :=rec.book;
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:P16_MARRIAGEDATE :=rec.marriagedate;
:P16_GROOMID := rec.id;
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:P16_SURNAME_BRIDE   := rec.surname;
:P16_FORNAME_BRIDE   := rec.forename;
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:P16_MARRIAGEDATE :=rec.marriagedate;
:P16_BRIDEID := rec.id;
close c_mar_principle;
end;

rambo81 wrote:
True but that answer is not really helping this situation either?
It's indisputably true, which is more than can be said for the results of querying this data.
The data is from an old legacy flat file database that has been exported into a relational database.
It should have been normalized at the time it was imported.
Without having to redesign the data model what options do I have in changing the PL/SQL to cater for multiple occurances
In my professional opinion, none. The actual problem is the data model, so that's what should be changed.

Displaying a message when there are no results from an XSL Query

Using MM_XSLTransform.class.php
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<xsl:param name="letter"/>
<xsl:output method="html" encoding="UTF-8"/>
<xsl:template match="/">
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        <td>
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      <br />
      </td>
        </tr>
      </table>
      </xsl:for-each>
</xsl:template>
</xsl:stylesheet>
Destination PHP file:
setXML("../regions/CPINFOWEB-mobile.xml"); $mm_xsl->setXSL("list.xsl"); $mm_xsl->addParameter("letter",$_GET['letter']); echo $mm_xsl->Transform(); ?>
The result Name and Town are displayed as a URL to link to a "more details" page.
All works fine, but when there are no results for a letter of the alphabet I obviously get a blank page.
How do I display a "no results" message instead

I deleted my original reply because the formatting of the XSL code was messed up by the forum. Here's trying again:
Your current code creates a new table for each result. The opening and closing <table> tags should be outside the the <for-each> loop. To deal with the possibility of no results being found, use a conditional statement and the count() function like this:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<xsl:param name="letter"/>
<xsl:output method="html" encoding="UTF-8"/>
<xsl:template match="/">
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<xsl:for-each select="dataroot/CPINFOWEB[Town=starts-with(Town, $letter) or Name=starts-with(Name, $letter)]">
        <tr>
        <td>
    <a href="detail.php?park={CostCode}"><xsl:value-of select="Name"/></a><br />
          <a href="detail.php?park={CostCode}"><xsl:value-of select="Town"/></a><br />
      <xsl:value-of select="Address"/><br />
      <br />
      </td>
        </tr>
</xsl:for-each>
<xsl:if test="count(dataroot/CPINFOWEB/Town) &lt; 1">
    <tr>
    <td>No records found</td>
    </tr>
    </xsl:if>
</table>
</xsl:template>
</xsl:stylesheet>

Why do Servlet exists when there are JSP's ?

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