About servlet parameter {0}

I have servlet.
protected static final String loginForm =
"<HTML><HEAD><TITLE>WebPOP3</TITLE></HEAD>" +
"<FORM ACTION=\"servlet/Webpop3\" METHOD=\"POST\">" +
"Host: <INPUT NAME=\"host\"><BR>" +
"User: <INPUT NAME=\"user\"><BR>" +
"Password: <INPUT TYPE=\"PASSWORD\"" +
" NAME=\"password\"><BR>" +
"<INPUT TYPE=\"HIDDEN\" NAME=\"action\"" +
" VALUE=\"list\">" +
"<INPUT TYPE=\"SUBMIT\" NAME=\"Login\">" +
"</FORM></BODY></HTML>";
protected void doLogin(HttpServletRequest request,HttpServletResponse response) throws IOException
printForm(loginForm,request,response);
So he generates me a login form and i do not know what is it {0} that does it meens and where it comes (variable)?
Thanks

Sorry i make some changes before the code must be like this
protected static final String linkList =
"<P><FORM ACTION=\"{0}\" METHOD=\"POST\">" +
"<A HREF=\"{0}?action=retrieve&msg={1}\">" +
"Message: {2}</A> " +
"<INPUT TYPE=\"HIDDEN\" NAME=\"action\"" +
" VALUE=\"delete\"><INPUT TYPE=\"HIDDEN\"" +
" NAME=\"msg\" VALUE=\"{1}\">" +
"<INPUT TYPE=\"SUBMIT\" VALUE=\"Delete\"></FORM>";
...

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Need info about the parameter _FIX_CONTROL in a BW environment

Hi ,
I have done some research about the parameter FIXCONTROL and went through the SAP note 1165319.
We have a task at hand where SAP has recommended a new value to be added to this parameter in a BW production environment.
Now in the above note there are an entire set of values which this parameter can take up.
I have understood to some extent that this has to do with this Fixes if case of any issues.
last month we have upgraded the oracle version of the database from 10.2.0.2 to 10.2.0.4.
Can anyone help me in understanding what this MergeFix is all about?
I need to better understand this concept.
Thank you.
Regards,
Hari Kishan.

Hello,
still not sure if I fully understood your question; but the recommended approach regarding patches is:
1) Apply all the interim patches recommended by SAP. For Oracle 10.2.0.4 these will those from SAP note 1137346. The merge fix from SAP note also 1165319 is mentioneded there.
And by the way, SAP note 1137346 is updated about once a month; new patches may be added, old ones may be removed. SAP recommends to follow accordingly; but if there aren't any problems, you might want to you keep your current state for a longer period.
2) Read all the SAP notes mentioned there. You may have to do additional tasks like setting Oracle parameters, FIXCONTROL or others. The value you have to set now may or may not be mentioned in one of these notes, I can't know.
3) If you encounter some problem, first search in SAP notes, or if necessary open a support call with SAP. You may then have to apply additional patches and set addtional values for FIXCONTROL.
And yes, this way the list of required patches may become specific to each customer, as customer requirements are specific.
But it would be difficult to find the exact list of needed patches in advance.
I think a BW consultant who is familiar with Oracle installations will tell you something similar. One who is very experienced in your scenario might also be able to recommend additional patches in advance.
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I want to learn more about "Servlet".Where can I find that document.

Hi ! all.
I am really need to know about Servlet technology programming.
Please! anyone can tell me.
Thank you very much!

for basics go to "JAVA How to program"
visit dietel & dietel website
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Two questions about servlets

Hi,
I'd like to ask you some questons about servlets :
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This is because I can only post files on my server, but can't execute java code
2) can servlets access the server files ? This is because my applets can only load files within the codebase directory on the server. However, i'd like to be able to get something like File.lisFiles() on the server's content. With applets, I have a security problem
Thanks a lot.
vincent

Hi,
1) Servlets need to be run (deployed) on an application server (i.e. WebLogic, Websphere) which works in conjunction with the web server. When the web server (HTTP Server) receives a request for a servlet from a browser, it passes the request to the application server where the servlet is deployed on which handles the request and provides a response. The JVM will be included in the application server.
2) Servlets do NOT run in the sandbox that applets run in and thus have complete access to file on the server. This is because the site running the servlets know exactly what code they're deploying on their server and thus have no security concerns.
If you're site is running on an ISP's server, then you're likely out of luck unless they give you admin access to an application server that runs on their server which allows you to deploy servlets onto.
makes sense?...
vc

Question about servlet architecture

Hello,
I have a question about Web Application / servlet architecture and development, and haven't had any luck finding an answer so far. My plan must be either unusual, or wrong, or both, so I'm hoping the community here could point me in the right direction.
I have quite a bit of background in OSGi, but very little in servlets. I know my architecture would work with something such as sever-side Equinox, but for the open source project I'm contemplating, I think that the more mainstream Tomcat/servler route would be better -- assuming it can be done. Here is a rather simplified scenario:
There is a class, Manager. It could be a Java class that implements Runnable, or a non-HTTP servlet (GenericServlet?), but somehow it should be configured such that it runs as soon as Tomcat starts.
When Manager runs, it instantiates its primary member variable: Hashtable msgHash; mshHash will map Strings (usernames) to ArrayList<String> (list of messages awaiting that user). Manager also has two primary public methods: addMsg() and getMsgs().
The pseudocode for addMsg is:
void addMsg(String username, String msg) {
if username=="*" { for each msgList in msgHash { msgList.add(msg) } return;
if username not in msgHash { msgHash.add(username, new ArrayList<String>) }
msgHash[username].add(msg)
And for getMsgs():
String getMsgs(username) {
String s = "";
for each msg in msgHash[username] { s = s + msg; }
return s;
Once Manager has started, it starts two HTTP Servlets: Sender and Receiver, passing a reference back to itself as it creates the servlets.
The HTML associated with Sender contains two text inputs (username and message) and a button (send). When the send button is pressed and data is POSTed to Sender, Sender takes it and calls Manager.addMsg(username.value, message.value);
Receiver servlet is display only. It looks in the request for HTTP GET parameter "username". When the request comes in, Receiver calls Manager.getMsgs(username) and dumps the resulting string to the browser.
In addition to starting servlets Sender and Receiver, the Manager object is also spawning other threads. For example, it might spawn a SystemResourceMonitor thread. This thread periodically wakes up, reads the available disk space and average CPU load, calls Manager.addMsg("*", diskAndLoadMsg), and goes back to sleep for a while.
I've ignored the synchronization issues in this example, but during its lifecycle Manager should be idle until it has a task to do, using for example wait() and notify(). If ever addMsg() is called where the message string is "shutdown", Manager's main loop wakes up, and Manager shuts down the two servlets and any threads that it started. Manager itself may then quit, or remain resident, awaiting a command to turn things back on.
Is any of this appropriate for servlets/Tomcat? Is there a way to do it as I outlined, or with minor tweaks? Or is this kind of application just not suited to servlets, and I should go with server-side Equinox OSGi?
Thanks very much for any guidance!
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FrolfFla wrote:
Hello,
I have a question about Web Application / servlet architecture and development, and haven't had any luck finding an answer so far. My plan must be either unusual, or wrong, or both, so I'm hoping the community here could point me in the right direction.
I have quite a bit of background in OSGi, but very little in servlets. I know my architecture would work with something such as sever-side Equinox, but for the open source project I'm contemplating, I think that the more mainstream Tomcat/servler route would be better -- assuming it can be done. Here is a rather simplified scenario:
There is a class, Manager. It could be a Java class that implements Runnable, or a non-HTTP servlet (GenericServlet?), but somehow it should be configured such that it runs as soon as Tomcat starts.You can configure a servlet to be invoked as soon as Tomcat starts. Check the tomcat documentation for more information on that (the web.xml contains such servlets already though). From this servlet you can start your Manager.
>
When Manager runs, it instantiates its primary member variable: Hashtable msgHash; mshHash will map Strings (usernames) to ArrayList<String> (list of messages awaiting that user). Manager also has two primary public methods: addMsg() and getMsgs().
The pseudocode for addMsg is:
void addMsg(String username, String msg) {
if username=="*" { for each msgList in msgHash { msgList.add(msg) } return;
if username not in msgHash { msgHash.add(username, new ArrayList<String>) }
msgHash[username].add(msg)
And for getMsgs():
String getMsgs(username) {
String s = "";
for each msg in msgHash[username] { s = s + msg; }
return s;
Once Manager has started, it starts two HTTP Servlets: Sender and Receiver, passing a reference back to itself as it creates the servlets. Not needed. You can simply create your two servlets and have them invoked through web calls, Tomcat is the only one that can manage servlets in any case. Servlets have a very short lifecycle - they stay in memory from the first time they are invoked, but the only time that they actually do something is when they are called through the webserver, generally as the result of somebody running the servlet through a webbrowser, either by navigating to it or by posting data to it from another webpage. The servlet call ends as soon as the request is completed.
>
The HTML associated with Sender contains two text inputs (username and message) and a button (send). When the send button is pressed and data is POSTed to Sender, Sender takes it and calls Manager.addMsg(username.value, message.value);
Receiver servlet is display only. It looks in the request for HTTP GET parameter "username". When the request comes in, Receiver calls Manager.getMsgs(username) and dumps the resulting string to the browser.This states already that you are going to run the servlets through a browser. You run "Sender" by navigating to it in the browser. You run "Receiver" when you post your data to it. Manager has nothing to do with that.
>
In addition to starting servlets Sender and Receiver, the Manager object is also spawning other threads. For example, it might spawn a SystemResourceMonitor thread. This thread periodically wakes up, reads the available disk space and average CPU load, calls Manager.addMsg("*", diskAndLoadMsg), and goes back to sleep for a while.Since you want to periodically run the SystemResourceMonitor, it is better to use a Timer for that in stead of your own thread.
>
I've ignored the synchronization issues in this example, but during its lifecycle Manager should be idle until it has a task to do, using for example wait() and notify(). If ever addMsg() is called where the message string is "shutdown", Manager's main loop wakes up, and Manager shuts down the two servlets and any threads that it started. Manager itself may then quit, or remain resident, awaiting a command to turn things back on.
Is any of this appropriate for servlets/Tomcat? Is there a way to do it as I outlined, or with minor tweaks? Or is this kind of application just not suited to servlets, and I should go with server-side Equinox OSGi?
Thanks very much for any guidance!
-MikeI don't see anything that cannot be done in a normal java web environment, as long as you are aware of how servlets operate.

Know about page parameter

Hi,
I want is there any page parameter portlet if it is then where it is in oracle portal

Hi,
Can you tell us more details about the functionality you are trying to achieve ?
Regards,
Sandeep

How to pass servlet parameter using encodeURL function in JSP page

Hi!!!
I have a very urgently problem.
in my JSP I have this:
<IMG border="0" src='<%=response.encodeURL("/MyImageServlet")%>'>
In this way, my servlet works fine (and I have in my page my blob-image).
But I have to pass to my servlet a list of dynamic parameter. I have tried all the possibilities like:
<IMG border="0" src='<%= (response.encodeURL("/MyImageServlet") + "?Param_name=" + sessionBean.getParamValue() + "&anotherParam" + sessionBean.getAnotherParamValue())%>'
but nothing....
In my servlet I use the init function to retrieve the initial parameters(defined in my web.xml file) in this way:
public void init(ServletConfig config) throws ServletException
super.init(config);
myParam = getInitParameter( "name_of_param");
but I retrieve only the default value (-1).
How to pass to my servlet the parameters? Please help me!
Excuse me for my english,
thank you for your help!

Hi!
Thanks for your reply!
I have tried this solution but it doesn't work!
When I do getInitParameter in the init function, the servlet take the default values...
Maybe I have wrote something wrong?
Excuse me for my english,
Thanks

About html parameter form

Hi Guys,
if i put the code as below in the before form value
<html>
<body bgcolor="#29716F">
<form method=post action="http://localhost/reports/rwservlet?">
<input name="hidden_run_parameters"
type=hidden value="report=account_statement.rdf&userid=scott/tiger@ora10&desformat=pdf&destype=Cache">
<center>
<p><table border=0 cellspacing=0 cellpadding=0>
<tr>
<td><input type=submit></td>
<td width=15>
<td><input type=reset></td>
</tr>
</table>
<p><hr><p>
</form>
</body>
</html>
the html parameter form works file ,it can take the user parameters into report output.
but if i put this code in after form value
it doesn't work, can not pass user parameters into output.
Actually, i just want to move submit and reset buttons down, let them are displayed after customized parameter form.
anybody has idea about this? Thanks in advance.
Appcat
Message was edited by:
user577805

Hello,
To display the buttons "Submit" and "Reset" at the bottom of the Parameter Form, just put the lines
<input type=submit>
<input type=reset>
just before the tag </form>
Example of "After Form Value" :
<table><tr>
<td><input type=submit></td>
<td width=15>
<td><input type=reset></td>
</tr></table>
</center>
</body>
</form>
</html>
Regards

About the parameter -XXaltjvm

I am using java for linux and java 1.4.2.
When I run
strings /usr/java/j2sdk1.4.2/bin/java | grep '\-X'
I get some strings look like parameter of java
In it have
--XXaltjvm
-Xtm
I am not sure if they are valid parameter and how to use them
Thanks for any comment
gan

Hello Alexis,
I have former confuse is because
document said hotspot compiler use less space than JIT compile and with a little speed lost. So I think hotspot compiler is not JIT compiler.
It may have follow conclusion:
static JIT compiler may be classic JIT compiler
dynamic JIT may be hotspot compiler
I would like to know some details about hotspot realization in J2ME,
But there are too few document can be found except white paper.
Hotspot in J2SE may have more informations.
Thanks for you reply
gan

Servlet Parameter type

Can I get the type of the Paramater in the request.getparamaternames / values
By type I mean the value got from checkbox, textbox ...
TIA
-B

The only difference (to my knowledge) between POST and GET is the order that the parameters and header information is sent. With GET (or a form without a method specified) the form parameters are sent first and then header information is sent. With POST, the header information is sent first and then a line with the parameter names and values.
Example:
GET/actionURL?parameterName=parameterValue HTTP/1.0
.. a bunch of header information ..
versus
POST/actionURL HTTP/1.0
.. a bunch of header information ..
parameterName=parameterValue
I don't think you can tell if it is a check box or not but it would be fairly simple to test. You could create a servlet to receive the ServletInputStream and then write out it's contents to your console or to a web page. Core Servlets and JavaServer Pages actually has the code to do this in their EchoServer.java servlet although I haven't personally tried it. You could use it and a dummy form containing the combo boxes to see what header information gets sent with it. My suspicion is that it won't be anything but the parameter name and the value though.

Loading servlet parameter differences between weblogic 8.1 and 6.1

          While migrating an application from weblogic 6.1 to weblogic 8.1 i have noticed
          that a servlet wasn't able to load some parameters. These parameters are context
          parameters; setting them as init parameters let the servlet to load smoothly.
          So here it is my question:
          is it possible that weblogic 6.1 loads also context parameters during servlet
          initialization???
          Greets,
          Luca


In order for someone to help you, you'd have to show exactly what you're trying to do, both in your parameter-reading code, and in the descriptor.
          As far as your actual question at the end of your note, I'm not even sure exactly what you're asking.

Question about servlet.xml setting

<?xml version="1.0" encoding="UTF-8"?>

<Server port="8025" shutdown="TEARSDOWN">

<Listener className="org.apache.catalina.core.AprLifecycleListener"/>
<Listener className="org.apache.catalina.mbeans.ServerLifecycleListener"/>
<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"/>
<Listener className="org.apache.catalina.storeconfig.StoreConfigLifecycleListener"/>

<GlobalNamingResources>

<Environment name="simpleValue" type="java.lang.Integer" value="30"/>

<Resource auth="Container" description="User database that can be updated and saved" factory="org.apache.catalina.users.MemoryUserDatabaseFactory" name="UserDatabase" pathname="conf/tomcat-users.xml" type="org.apache.catalina.UserDatabase"/>
<Resource name="jdbc/mp" auth="Container"
type="javax.sql.DataSource" driverClassName="oracle.jdbc.driver.OracleDriver"
url="jdbc:oracle:thin:@172.25.43.224:1521:mp"
username="mpuser" password="mp" maxActive="20" maxIdle="10"
maxWait="-1"/>
<Resource name="jdbc/passport" auth="Container"
type="javax.sql.DataSource" driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://218.1.14.134:3306/xmnext_passport?autoReconnect=true"
username="zhouzhijun" password="zhouzhijun*1234567" maxActive="20" maxIdle="10"
maxWait="-1"/>
</GlobalNamingResources>

<Service name="Catalina">

<Connector URIEncoding="utf-8" acceptCount="100" connectionTimeout="20000" disableUploadTimeout="true" enableLookups="false" maxHttpHeaderSize="8192" maxSpareThreads="75" maxThreads="150" minSpareThreads="25" port="8084" redirectPort="8443"/>

<Connector enableLookups="false" port="8009" protocol="AJP/1.3" redirectPort="8443"/>

<Engine defaultHost="localhost" name="Catalina">
<Realm className="org.apache.catalina.realm.UserDatabaseRealm" resourceName="UserDatabase" />

<Realm className="org.josso.tc55.agent.jaas.CatalinaJAASRealm"
appName="app1"
userClassNames="org.josso.gateway.identity.service.BaseUserImpl"
roleClassNames="org.josso.gateway.identity.service.BaseRoleImpl"
debug="1" /> // I am not sure realm can set twice like this?
<Host appBase="webapps" autoDeploy="false" name="localhost" unpackWARs="true" xmlNamespaceAware="false" xmlValidation="false">

<Valve className="org.josso.tc55.agent.SSOAgentValve" debug="9" /> when I set this valve, the tomcat seems running abnormal...
</Host>
</Engine>
</Service>
</Server>
Could you help me to check this file setting? Just check this "servlet.xml". Thank you very much!

<?xml version="1.0" encoding="UTF-8"?>

<Server port="8025" shutdown="TEARSDOWN">

<Listener className="org.apache.catalina.core.AprLifecycleListener"/>
<Listener className="org.apache.catalina.mbeans.ServerLifecycleListener"/>
<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"/>
<Listener className="org.apache.catalina.storeconfig.StoreConfigLifecycleListener"/>

<GlobalNamingResources>

<Environment name="simpleValue" type="java.lang.Integer" value="30"/>

<Resource auth="Container" description="User database that can be updated and saved" factory="org.apache.catalina.users.MemoryUserDatabaseFactory" name="UserDatabase" pathname="conf/tomcat-users.xml" type="org.apache.catalina.UserDatabase"/>
<Resource name="jdbc/mp" auth="Container"
type="javax.sql.DataSource" driverClassName="oracle.jdbc.driver.OracleDriver"
url="jdbc:oracle:thin:@172.25.43.224:1521:mp"
username="mpuser" password="mp" maxActive="20" maxIdle="10"
maxWait="-1"/>
<Resource name="jdbc/passport" auth="Container"
type="javax.sql.DataSource" driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://218.1.14.134:3306/xmnext_passport?autoReconnect=true"
username="zhouzhijun" password="zhouzhijun*1234567" maxActive="20" maxIdle="10"
maxWait="-1"/>
</GlobalNamingResources>

<Service name="Catalina">

<Connector URIEncoding="utf-8" acceptCount="100" connectionTimeout="20000" disableUploadTimeout="true" enableLookups="false" maxHttpHeaderSize="8192" maxSpareThreads="75" maxThreads="150" minSpareThreads="25" port="8084" redirectPort="8443"/>

<Connector enableLookups="false" port="8009" protocol="AJP/1.3" redirectPort="8443"/>

<Engine defaultHost="localhost" name="Catalina">
<Realm className="org.apache.catalina.realm.UserDatabaseRealm" resourceName="UserDatabase" />

<Realm className="org.josso.tc55.agent.jaas.CatalinaJAASRealm"
appName="app1"
userClassNames="org.josso.gateway.identity.service.BaseUserImpl"
roleClassNames="org.josso.gateway.identity.service.BaseRoleImpl"
debug="1" /> // I am not sure realm can set twice like this?
<Host appBase="webapps" autoDeploy="false" name="localhost" unpackWARs="true" xmlNamespaceAware="false" xmlValidation="false">

<Valve className="org.josso.tc55.agent.SSOAgentValve" debug="9" /> when I set this valve, the tomcat seems running abnormal...
</Host>
</Engine>
</Service>
</Server>
Could you help me to check this file setting? Just check this "servlet.xml". Thank you very much!

Question about servlet in a package

hello
i use tomcat4.0,and write a simple servlet "Hello.java",put it in "C:\jakarta-tomcat-4.0\webapps\ee\WEB-INF\classes",i input "http://127.0.0.1:8080/ee/servlet/Hello",the code works well,but after i add a package declaration "package hi;" in front of my servlet,and put it in "C:\jakarta-tomcat-4.0\webapps\ee\WEB-INF\classes\hi\",wheather i input "http://127.0.0.1:8080/ee/hi/servlet/Hello" or "http://127.0.0.1:8080/ee/servlet/hi/Hello",both of them don't work,why?and how can i call a servlet that is in a package from the browser? thanks!
my code:
package hi;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Hello extends HttpServlet{
     public void service(HttpServletRequest req,
          HttpServletResponse resp)
          throws IOException,
               ServletException{
          resp.setContentType("text/html");
          PrintWriter out=new PrintWriter(resp.getOutputStream());
          out.print("<html>");
          out.print("<body>");
          out.print("hello world!");
          out.print("</body>");
          out.print("</html>");
          out.close();

Hi,
Open your ee/web-inf/web.xml file and add these lines.
<servlet>
<servlet-name>
Hello
</servlet-name>
<servlet-class>
hi.Hello
</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>
Hello
</servlet-name>
<url-pattern>
/Hello
</url-pattern>
</servlet-mapping>
Start the tomcat and give the URL,
http://127.0.0.1:8080/ee/servlet/Hello
Hope this helps.
If you don't have a web.xml file there, you can add these lines in your Tomcat\conf\web.xml file.
Sudha

Does anyone know anything about servlets and multipart posting?

im not getting much response on the servlet forum :(
http://forum.java.sun.com/thread.jspa?threadID=701292&tstart=0
(i'll link back to here too)

I have a QR reader on my iphone. Works just brill. I've used it to create business cards, with a boat load more information on it (Including my duty times, etc)
Most of the QR readers in the App store are free, so give them a try. You can copy and paste the data just like normal text.
What application for them did you have in mind?

Question about 'direct' parameter in sql loader utility

Hi eveyone,
Today I was asked what the advantages and disadvantages of 'direct' parameter of sql loader.
In my opinion, if swithing direct on, oracle use direct path load.
And it has no difference from the append hind in insert statement.
The core merits are less redo hence faster.
The main shortcoming is since little redo generated, we have to ask DBA to back up the data according to the rules immediately after the loading.
Does my answer make sense or not? Plesae help to point out the important things I missed.
best regards,
Leon

Hi,
Direct path Export is much faster than conventional path Export because the data is read from disk into the buffer cache and rows are transferred directly to the Export client.
Some conditions to use DIRECT parameter are,
1. The Export parameter BUFFER applies only to conventional path Exports. For direct path Export, use the RECORDLENGTH parameter to specify the size of the buffer that Export uses for writing to the export file.
2. You cannot use direct path when exporting in tablespace mode (TRANSPORT_TABLESPACES=Y).
3. The QUERY parameter cannot be specified in a direct path Export.
Thanks

About servlet parameter {0}

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