Question about cookies in OWA package and JSP

Hi all!!
Can I get in a JSP page a cookie set in a PL/SQL procedure?
I set a cookie in a PL/SQL procedure (Using the OWA package).
Later (a few pages forward), I try to get it using
HttpServletRequest.getCookies in a JSP page.
When I see the list of cookies, my cookie is not there!
How can I achieve this?? is this possible??
Thanks!

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

Similar Messages

Info about the linux-firmware package and rt2780-usb-fw

Hello,
I have a have question about the linux-firmware package in the repo.
Recently there was an update for this package and when I checked its contents I saw that it also updates rt2870usb-fw.
Maybe I am a bit confused about the all kernel modules / firmware, but since I need to compile the latest kernel (linux-mainline from AUR) to get my buffalo wireless usb work(my rt2870 is supported from rc4), would it be possible to update only this package and use the kernel in the arch repo?
I can't test it myself because I am out of town for while.
Thank you

Hello,
I have a have question about the linux-firmware package in the repo.
Recently there was an update for this package and when I checked its contents I saw that it also updates rt2870usb-fw.
Maybe I am a bit confused about the all kernel modules / firmware, but since I need to compile the latest kernel (linux-mainline from AUR) to get my buffalo wireless usb work(my rt2870 is supported from rc4), would it be possible to update only this package and use the kernel in the arch repo?
I can't test it myself because I am out of town for while.
Thank you

Here's a very basic question about 2 TB external drives and Time Machine.

Here's a very basic question about 2 TB external drives and Time Machine.
Ihave a Mac Pro with a .75 TB and 1 TB drive. It also has a 1 TB 2ndinternal drive. My current external drive is too small so I'll begetting a 1.5 TB or 2 TB drive.
Obviouslythe new larger 2 TB drive will backup everything on the Mac Prointernal drive with Time Machine. But there will be 1 TB of space leftover going to waste.
ShouldI partition the external drive so that the TM portion will be 1 TB andthe use the remaining extra partition for additional file backups withCarbon Copy?
Thanks for any insights.
I tried searching around on the new Apple discussion forum, but I find it much harder to use than the old forum I used to use.

The problem with terabyte drives is that that a 3 TB is about as big as you can get without going into RAID territory. Ideally, a Time Machine drive should be 3 times as large as all the drives you are backing up. So, if you have 2.75 TB of internal storage, you should have 8 TB of Time Machine space.
Of course, that is "should". If your TB drives are mostly empty, then you can get away with something 3 times the size of your used disk space. Just remember that you are pushing it. Linc is right about Time Machine needing space to work.
It is unlikely that you have regular churn on 2.75 TB of disk. I suggest identifying which drives and folders have the most activity and excluding those drives and directories that don't change much. It would be better to archive the data that doesn't change often and keep it out of Time Machine. Then you may be able to get away with a 2 TB Time Machine drive.

Question about 2 TB external drives and Time Machine.

Here's a very basic question about 2 TB external drives and Time Machine.
I have a Mac Pro with a .75 TB and 1 TB drive. It also has a 1 TB 2nd internal drive. My current external drive is too small so I'll be getting a 1.5 TB or 2 TB drive.
Obviously the new larger 2 TB drive will backup everything on the Mac Pro internal drive with Time Machine. But there will be 1 TB of space left over going to waste.
Should I partition the external drive so that the TM portion will be 1 TB and the use the remaining extra partition for additional file backups with Carbon Copy?
Thanks for any insights.
I tried searching around on the new Apple discussion forum, but I find it much harder to use than the old forum I used to use.

John,
I'm not sure why you posted in the iMac forum so I'm going to attempt to get you to the correct spot. I would recommend reposting in the Time Machine Forum, this is part of the OS X forums (Leopard or Snow Leopard) because you are using Snow Leopard (your profile indicates you are) please click Apple Support Communities and type Snow Leopard. Then you can narrow the search down by clicking Refine this List.
Roger

3 question about cookie and session please.

1. I know that session automatic use in JSP by default and save session id in cookie. I have code that show all cookie on my computer
<%
     Cookie [ ] listcookie = request.getCookies();
     Cookie mycookie = null;
     for(int i=0; i<listcookie.length; i++)
          mycookie = listcookie;
          out.println("<tr><td> " + mycookie.getName() + "</td>");
          out.println("<td> " + mycookie.getValue() + "</td></tr>");
%>
When I first run this code it now show cookie. But when I click refresh it show session cookie. Why it not show session cookie at first time?
2. I use tomcat on window. Is session on server is save as file. Which directory it save?
3. I use method getCreationTime() to check first create session time and method session.getLastAccessedTime() to check last access session time. I have to file
showsession1.jsp
first time create is <%=session.getCreationTime()%> <br>
last time access is <%=session.getLastAccessedTime()%> <br>
<a href="showsession2.jsp"> showsession2.jsp</a>showsession2.jsp
first time create is <%=session.getCreationTime()%> <br>
last time access is <%=session.getLastAccessedTime()%> <br>When I open browser and run showsession1.jsp first time create and last time access is equal when I click link to showsession2.jsp it also equal. Why it still equal because it is second time that I access JSP file? It change when I refresh file showsession2.jsp

1. When I first run this code it now show cookie. But
when I click refresh it show session cookie. Why it
not show session cookie at first time?
When you first request the JSP, the session cookie does not exist on your PC and so your browser cannot supply it which means that the JSP cannot display it. The session cookie is created when the JSP returns the response to the first request. The browser can then send the cookie on subsequent requests.
2. I use tomcat on window. Is session on server is
save as file. Which directory it save?How the server saves the session info is server dependent and it's unlikely you will be able to view it.
3. I use method getCreationTime() to check first
create session time and method
session.getLastAccessedTime() to check last access
session time. I have to file
showsession1.jsp
When I open browser and run showsession1.jsp first
time create and last time access is equal when I click
link to showsession2.jsp it also equal. Why it still
equal because it is second time that I access JSP
file? It change when I refresh file showsession2.jspProbably showsession2.jsp was already in the browser cache and so there was no request to the server until you refreshed

Some questions about javacard 2.1.1 and smartcardio

Hello i have some question about java card 2.1.1 and the smartcardio package.
1.) I want to sign a message with the Signature.ALG_RSA_SHA_PKCS1 algorithm. I use the following code in the applet to sign the message:
final static byte P1_CREATION_MODE = (byte) 0x01;
final static byte INS_SIGN_MODE = (byte) 0x60;
final static byte SmartCard_CLA = (byte) 0xB0;
private void signMessage(APDU apdu) {
        byte[] buffer = apdu.getBuffer();
        byte byteRead = (byte) (apdu.setIncomingAndReceive());
        signature.init(privateKey, Signature.MODE_SIGN);
        short length = signature.sign(buffer, ISO7816.OFFSET_CDATA, byteRead, buffer, (short) 0);
        apdu.setOutgoingLength((short) length);
        apdu.sendBytesLong(buffer, (short) ISO7816.OFFSET_CDATA, (short) length);
        apdu.setOutgoing();
    }On the host side I use the following code to connect to the card and to send the sign apdu:
if (TerminalFactory.getDefault().terminals().list().size() == 0) {
            LOGGER.log(Level.SEVERE, "No reader present");
            throw new NoSuchCardReader();
        /* Select the first terminal*/
        CardTerminal terminal = TerminalFactory.getDefault().terminals().list().get(0);
        /* Is a card present? */
        if (!terminal.isCardPresent()) {
            LOGGER.log(Level.SEVERE, "No Card present!");
            throw new NoSuchCard();
        /* Set the card protocol */
     Card card = terminal.connect("*");
        ATR atr = card.getATR();
        LOGGER.fine(getHexString(atr.getBytes()));
        LOGGER.fine(getHexString(atr.getHistoricalBytes()));
        CardChannel channel = card.getBasicChannel();
        CommandAPDU cmd = new CommandAPDU((byte) 0xb0, (byte) 0x60, (byte) 0x01, (byte) 0x00, new String("datadatdatadata").getBytes(), (byte) 0x40);
     ResponseAPDU response = channel.transmit(cmd);
        card.disconnect(false);But this does not work and i got the following error
javax.smartcardio.CardException: sun.security.smartcardio.PCSCException: Unknown error 0x8010002f
        at sun.security.smartcardio.ChannelImpl.doTransmit(ChannelImpl.java:202)
        at sun.security.smartcardio.ChannelImpl.transmit(ChannelImpl.java:73)
        at de.upb.client.smartmeter.SmartMeter.initSmartCardApplet(SmartMeter.java:114)
        at de.upb.client.smartmeter.SmartMeterApplikation.main(SmartMeterApplikation.java:39)
Caused by: sun.security.smartcardio.PCSCException: Unknown error 0x8010002f
        at sun.security.smartcardio.PCSC.SCardTransmit(Native Method)
        at sun.security.smartcardio.ChannelImpl.doTransmit(ChannelImpl.java:171)
        ... 3 more2.) 3Des encryption
I want to use the 3Des algorithm to encrypt my data. I use
keyDES = (DESKey) KeyBuilder.buildKey(KeyBuilder.TYPE_DES,
                    KeyBuilder.LENGTH_DES3_2KEY, false);
cipherDES = Cipher.getInstance(Cipher.ALG_DES_CBC_ISO9797_M2, false);But i do not know what is the aquivalent on the host side??
3.) Another problem is that i am not able to send the modulus of a public key from the host applikation to the smard card
new CommandAPDU((byte) 0xb0, (byte) 0x20, (byte) 0x01, (byte) 0x00, modulus.toByteArray()); // create the apdu
// the method in the applet
private void setServerKeyMod(APDU apdu) {
        byte[] buffer = apdu.getBuffer();
        try {
            byte byteRead = (byte) (apdu.setIncomingAndReceive());
            short off = ISO7816.OFFSET_CDATA;
            // strip of any integer padding
            if (buffer[off] == 0) {
                off++;
                byteRead--;
            publicKeyServer.setModulus(buffer, off, byteRead);
        } catch (APDUException ex) {
            ISOException.throwIt((short) (SW_APDU_EXCEPTION + ex.getReason()));
    }The error code is 6700
4.) My last problem ist, that i am not able to use a value bigger than 0x7F as the ne field in the apducommand, because i get the following error
CommandAPDU((byte) 0xb0, (byte) 0x60, (byte) 0x01, (byte) 0x00, data, (byte) 0xff);
java.lang.IllegalArgumentException: ne must not be negative
        at javax.smartcardio.CommandAPDU.<init>(CommandAPDU.java:371)
        at javax.smartcardio.CommandAPDU.<init>(CommandAPDU.java:252)I thought that it this should be possible in order to use all the bytes of the response apdu.
If you need more code to help please let me know.
Cheers
Edited by: 858145 on 06.07.2011 08:23

2) What is PKCS? what is the difference between
PKCS#11 and PKCS#15??PKCS is the abbreviation of "Public-Key Cryptography Standards"
PKCS #11: Cryptographic Token Interface Standard
See http://www.rsasecurity.com/rsalabs/node.asp?id=2133
PKCS #15: Cryptographic Token Information Format Standard
http://www.rsasecurity.com/rsalabs/node.asp?id=2141
If you want to use yor smartcard as secure token it doesn't have to be a JavaCard.
BTW: I don't remember a way to access PKCS#15 tokens on a JavaCard from within an oncard JavaCard program. If you want to use keys in your oncard program, you have to transfer it onto the card or generate it oncard and export the public key by your own oncard/offcard code.
Jan

Strange question about cookie

jsp page 1 create a cookie and send it to browser,then forward to jsp page 2,
jsp page 2 can read cookie successfully,and jsp page 2 link to jsp page 3,
but in jsp page 3,cookie can't be read yet,why?
Anybody have experience like to tell me?

Thx.I have solved the problem.
The reason jsp page 3 can't read cookie is cookie has the
property "path",the application write and the application read
the cookie must be at the same path,otherwise it failed to read.
If they are at the different path,you must use cookie.setPath()
method to set the path which the application read is at before
you write the cookie.
The other thing I found is forward() will not change the path,
so why the jsp 2 can read the cookie.
once you added a cookie to your response, then any
resource in your application should be able to read it
and retrieve it's value, because actually it is going
to be stored at the client local drive. maybe you
should be sure about the age of the cookie i.e
Cookie userCookie = new Cookie("cookiename",
"cookie_value");
userCookie.setMaxAge(60*60*24*365); // 1 year,
setMaxAge in seconds
response.addCookie(userCookie);
so maybe if you try to set the max age of the cookie
it would work
regards

Some questions about the integration between BIEE and EBS

Hi, dear,
I'm a new bie of BIEE. In these days, have a look about BIEE architecture and the BIEE components. In the next project, there are some work about BIEE development based on EBS application. I have some questions about the integration :
1) generally, is the BIEE database and application server decentralized with EBS database and application? Both BIEE 10g and 11g version can be integrated with EBS R12?
2) In BIEE administrator tool, the first step is to create physical tables. if the source appliation is EBS, is it still needed to create the physical tables?
3) if the physical tables creation is needed, how to complete the data transfer from the EBS source tables to BIEE physical tables? which ETL tool is prefer for most developers? warehouse builder or Oracle Data Integration?
4) During data transfer phase, if there are many many large volume data needs to transfer, how to keep the completeness? for example, it needs to transfer 1 million rows from source database to BIEE physical tables, when 50%is completed, the users try to open the BIEE report, can they see the new 50% data on the reports? is there some transaction control in ETL phase?
could anyone give some guide for me? I'm very appreciated if you can also give any other information.
Thanks in advance.

1) generally, is the BIEE database and application server decentralized with EBS database and application? Both BIEE 10g and 11g version can be integrated with EBS R12?You, shud consider OBI Application here which uses OBIEE as a reporting tool with different pre-built modules. Both 10g & 11g comes with different versions of BI apps which supports sources like Siebel CRM, EBS, Peoplesoft, JD Edwards etc..
2) In BIEE administrator tool, the first step is to create physical tables. if the source appliation is EBS, is it still needed to create the physical tables?Its independent of any soure. This is OBIEE modeling to create RPD with all the layers. If you build it from scratch then you will require to create all the layers else if BI Apps is used then you will get pre-built RPD along with other pre-built components.
3) if the physical tables creation is needed, how to complete the data transfer from the EBS source tables to BIEE physical tables? which ETL tool is prefer for most developers? warehouse builder or Oracle Data Integration?BI apps comes with pre-built ETL mapping to use with the tools majorly with Informatica. Only BI Apps 7.9.5.2 comes with ODI but oracle has plans to have only ODI for any further releases.
4) During data transfer phase, if there are many many large volume data needs to transfer, how to keep the completeness? for example, it needs to transfer 1 million rows from source database to BIEE physical tables, when 50%is completed, the users try to open the BIEE report, can they see the new 50% data on the reports? is there some transaction control in ETL phase?User will still see old data because its good to turn on Cache and purge it after every load.
Refer..http://www.oracle.com/us/solutions/ent-performance-bi/bi-applications-066544.html
and many more docs on google
Hope this helps

Questions about CIN tax procedure choice and pricing schemas

Hi all,
I have to implement SAP on a Indian company and I'm verifying all particularity about this country (in particular tax procedures and the great number of differents tax conditions used).
I have two questions about tax procedures and pricing schemas. Every feedback about thse points will be appreciated.
a) To choose tax procedure TAXINN or TAXINJ which are the elements that I have to consider?
I have read lot of documentation about CIN implementation and Iu2019m oriented to choose TAXINN schema, but If possible I would to understand better which are on behalf of one choice or another.
b) To define pricing schemas for India, after check with local users and using examples of documents (in particular tax invoice) actually produced, I have understood that taxes have to be applied on amount defined starting from price list, minus discounts recognized to customer plus surcharges eventually to bill (packing, transport, etc.).
Itu2019s correct for any type of taxes that tax amount is calculated on u201Cnet valueu201D defined at item level or there are exceptions to this rule?
Thanks in advance
Gianpaolo

hi,
this is to inform you that,
a) About point 1 I know the difference between the 2 tax procedures (conditions or formulas). I also have read in others post in the FORUM that TAXINN is preferable. So I would to understand which are the advantages to choose instead TAXINJ. There are particular reasons or it'a only an alternative customizing setting?
a.a. for give for posting the link : plese give me the advantages of TAXINJ and TAXINN
CIN - TAXINN and TAXINJ
b) About point 2, to define which value has to be used as base amount to calculate taxes isn't a choice, but is defined depending by fiscal requirement of the country, in this case India fiscal requirement. I know that, as Lakshmipathi
write as answer on my question, exception could be, but it was important for me to understand if I have understood correctly the sequence of the pricing condition in the schema in "normal" situation.
b.b. you can create your own pricing procedure for this and go ahead.
hope this clears your issue.
balajia

JAVA PACKAGES and JSP

i Have two problems one is i am designing a website which consists of a form. I am trying to write the Connectiviy and all other insert statements in seperate java packages and include them in JSP files.
i Have two java packages one is DBUtil(having two java files both dealing with connectovity) and another one is StudentUtIl which has java files that open the connections with database connection and insert data into DB., I am having a big Problem here. How can i call the function in the other java package in the files in this java package. i have openDB()and Close() in the other Db and i want to call these functions in JAVA classes in the other package. How to include a package. Both these packages are in the same File system mounted on a Local directory

Thank you for the reply. I am giving the code i have given the full class name . and now it is giving the following error :
Cannot reference a non-static method connectDB() in a static context.
I am also giving the code. Please do help me on this. i am a beginner in java.
import java.sql.*;
import java.util.*;
import DButil.*;
public class StudentManager {
/** Creates a new instance of StudentManager */
public StudentManager() {
Connection conn = null;
Statement cs = null;
public Vector getStudent(){
try{
dbutil.connectDB();
String Query = "Select St_Record, St_L_Name, St_F_Name, St_Major, St_Email_Address, St_SSN, Date, St_Company, St_Designation";
cs = conn.createStatement();
java.sql.ResultSet rs = cs.executeQuery(Query);
Vector Studentvector = new Vector();
while(rs.next()){
Studentinfo Student = new Studentinfo();
Student.setSt_Record(rs.getInt("St_Record"));
Student.setSt_L_Name(rs.getString("St_L_Name"));
Student.setSt_F_Name(rs.getString("St_F_Name"));
Student.setSt_Major(rs.getString("St_Major"));
Student.setSt_Email_Address(rs.getString("St_Email_Address"));
Student.setSt_Company(rs.getString("St_Company"));
Student.setSt_Designation(rs.getString("St_Designation"));
Student.setDate(rs.getInt("Date"));
Studentvector.add(Student);
if( cs != null)
cs.close();
if( conn != null && !conn.isClosed())
conn.close();
return Studentvector;
}catch(Exception ignore){
return null;
}finally {
dbutil.closeDB();
import java.sql.*;
import java.util.*;
public class dbutil {
/** Creates a new instance of dbutil */
public dbutil() {
Connection conn;
public void connectDB(){
conn = ConnectionManager.getConnection();
public void closeDB(){
try{
if(conn != null && !conn.isClosed())
conn.close();
}catch(Exception excep){
The main error is occuring at the following lines connectDB() and closeDB() in the class student manager. The class dbutil is in an another package.with an another file called connectionManager which establishes the connection with DB. The dbutil has the openconnection and close connection methods. I have not yet written the insert statements in StudentManager. PLease do Help me

Question about the notification center (Mails and Reminders)

Hello together,
I just started using Mountain Lion and now I have some few questions about the notification center.
1. Is it possible to show all reminds in the notification center? I have a lot of reminds without an date / time and they don't appear in the notification center.
2. Is it possible to show the last five Mails in the notification center? I'm just seeing new incoming mails, but I would prefer it, if I could see the last five mails
     (no matter if readed or unreaded).
Thank you very much for you help.
Ratte1988
Hallo zusammen,
ich habe gerade damit begonnen Mountain Lion zu verweden und habe einige Fragen zur Mitteilungszentrale.
1. Ist es möglich alle Erinnerungen in der Zentrale anzuzeigen? Ich habe viele Erinnerungen, die ohne Datum / Uhrzeit sind und in der Mitteilungszentrale
     daher nicht auftauchen.
2. Ist es möglich, sich die letzten fünf Mails in der Zentrale anzeigen zu lassen? Ich sehe nur neue ungelesene Mails, würde es aber vorziehen die letzten
     fünf Mails sehen zu können (egal ob gelesen oder ungelesen.)
Danke für eure Hilfe.
Ratte1988

Only reminders with dates appear in the notification center - undated ones don't. Once an email has been read, it is removed from the notification center. Apple has a feedback center where you can offer suggestions.

A few question about iPhone OS in CS5 and CS5 in general.

Hi,
I'm an IT trainer and I am trying to introduce my students to programming for iPhone/iPod Touch. (They are Secondary 2 students. 14 years old) The school is using a windows computer and CS5 right now is the best for the class (Not a steep learning curve and a user-friendly program). I know about the problems over the iPhone OS in CS5 with Apple but I was told it is still available for use. Furthermore, we have no intention of bringing the apps created to the Apple Store. I've tried the trial version and before I make any purchase, I would actually like to ask a few questions.
Is the iPhone OS in the trial version itself complete? Is there anything left out from the trial version because when I tried it, it seems fine however I did not try publishing to an iPhone due to the certificates. Is there a reason for the certificate? Is there any way around it because if there isn't do I need to get a certificate for every single student? (I'm looking at a class of 40 students.) Is the certificate available for windows platform?
Lets say, I got myself a certificate, create a simple program and then publish it, can I immediately bring it over to iTunes and then sync? Will it work that way? I don't want it to be too tedious for the students to see the end result. I've done quite a few research and have come across people having problems bringing it into their devices. Those people mention about bringing it to Cydia and needing to jailbreak the device. The devices made available for the students are not jailbroken. Will iPhone OS with proper certification still need Cydia for use with their device? Will only jailbroken device allow a CS5 app? I hope you get what I'm trying to say. We as trainers do not support teaching students to jailbreak, so that's definitely a no-no.
Another thing about CS5. Previously I have called customer support about the CS4 the school is using now and the problem with nested animation when publishing the animation as a video file, is this problem still in CS5? Does CS5 allow nested animation to be published as a video file? If it isn't, is there any way around it?
Thank you for your time and patience in answering my questions.
Regards,
Shafuraa

Dear Marco,
Thanks for th links, its quite handy. One more help required from you as its related to Idsktune. I was just reruning the idsktune on Soalris 10 box where zfs file system used, and able to see the below warning
WARNING: largefiles option is not present on mount of /, files may be limited to 2GB in size.
Could you tell me this alert specific to zfs file system, I was searching the mount parameter options specific to file size, but not able to get anything. Below are the system parameters.
bash-3.00$ ulimit -a
core file size (blocks, -c) unlimited
data seg size (kbytes, -d) unlimited
file size (blocks, -f) unlimited
open files (-n) 256
pipe size (512 bytes, -p) 10
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 29995
virtual memory (kbytes, -v) unlimited
In UFS file system I have noted, for such largefile option we are adding the "largefile" parameter in mount, below is such an example.
/var/crash on /dev/md/dsk/d40 read/write/setuid/devices/intr/largefiles/logging/xattr/onerror=panic/dev=1540028 on Thu Aug 19 14:54:11 2010
Could you guide me on this file size warning specific to zfs file system.
Many thanks in advance for your support,

Some basic questions about rmi registry context "bind" and "lookup"

We have more processing to do than can be accomplished with a single computer. To solve the problem I've implemented a distributed computing solution using RMI. (The first time I saw RMI was about 2 weeks ago, so please bear with me!)
The implementation is a proof of concept not a fully fleshed out system. I have one "Workunit Distributor" computer and any number of "Data Processor" computers all on the same lan segment. "Workunit Distributor" and "Data Processor" computers are both RMI client and server to each other. The "Data Processor" computers are given the ip address and name of the "Data Distributor" on the commandline when they start. They communicate their willingness to receive and process a workunit to the ""Workunit Distributor" via a RMI call. Work units are sent to available "DataProcessors" and results are eventually returned to the "WorkunitDistributor" (minutes or hours later). The model program works quite well, and appears to be capable of doing the processing we need to get done.
But now that it seems viable, I've been asked to make it a little more scalable, flexible and self configuring. In particular, instead of one "Workunit Distributor", any number of "Workunit Distributors" should be allowed to show up or disappear from the lan at any time and the system should continue to function. I've worked out a good scheme for how this can be done, but I have a couple of questions about the RMI registry (registries?). I'm trying to keep from implementing some functionality that may already be available as a library or subsystem.
With my current model design, each computer binds to its own registry with a unique name. For instance:
CRDataProcessorImpl crdpi = new CRDataProcessorImpl(svr);
Context crDataProcessingContext = new InitialContext();
crDataProcessingContext.bind("rmi:"+hostName, crdpi);
Currently the "Data Processors" get the info they need for a Context lookup() of the one and only "Workunit Distributor" from the commandline. And the info the "Workunit Distributor" needs to do a Context lookup() of a "DataProcessor" is passed to it from each "DataProcessor" via a RMI call.
But in the newer (yet to be implemented) scheme where any and all "Workunit Distributors" show up and disappear whenever they feel like, the naming bootstrapping scheme described above won't work.
I can imagine a few ways of solving this problem. For instance, having "Workunit Distributors" multicast their contact information on the lan and have a worker thread on each "Data Processor" keep track of the naming information that was multicast. Another alternative (more organized, but more complex) might be to have a dedicated host with a "well known" address and port that "Workunit Distributors" and "Data Processors" could all go to, to register or look up at an application level. Sort of a "domain name service" for RMI. But both these schemes look like a lot of work to implement , debug and maintain.
The BEST thing would be if there was one plain vanilla RMI registry that was usable by all RMI enabled computers instead of having each computer have its own local name registry. In volume 2 of the Core Java2 book it says that every registry must be local. I'm only hoping there's been progress since the book was published and now a central rmi registry is available.
If you have any ideas about this I'd like to hear what you know.
Thanks in advance for any advice.
Lenny Wintfeld
ps - I don't believe web services, as full featured as it is, is a useful alternative. I'm moving 100's (in the future possibly 1000's) of megabytes back an forth for processing.

The local bind/rebind/unbind restriction is still there and it will always be there.
I would look at
(a) RMI/IIOP, where you use COSNaming as a registry, which doesn't have that registriction, and which also has location-independent object identifiers
(b) Jini.

A question about CREATE PUBLIC DATABASE LINK and ORA-12154 error

Dear all,
I have a problem about public database link creation and I would appreciate if you could kindly give me a hand. I have the following connection parameters in my
tnsnames.ora file:
DGPAPROD.WORLD =
     (DESCRIPTION =
       (ADDRESS_LIST =
        (ADDRESS = (COMMUNITY=tcp.world)
          (PROTOCOL=TCP)(HOST=ORASR001)(PORT=1521)
       (CONNECT_DATA = (SID = DGPAPROD))
...Having the above mentioned parameters I can connect to this remote database directly in a SQL*Plus shell:
$ sqlplus username/[email protected] works pretty well and the connection is established without any problem.
Now, what I would like to do is to create a public database link to this remote database in order to avoid the user/connection switching for viewing the
content of this database. I proceeded according to the syntax indicated in the Oracle online documentation:
http://download.oracle.com/docs/cd/B28359_01/server.111/b28286/statements_5005.htm#SQLRF01205
Therefore I run the following in order to create a public database link
CREATE PUBLIC DATABASE LINK SR001_dblink CONNECT TO user IDENTIFIED BY password USING 'DGPAPROD.WORLD';Apparently there is no error and the link is created successfully. However it cannot resolve the remote host and whenever I run the following query
(myenterprise is the name of a table in that remote database)
SELECT *
FROM myenterprise@SR001_dblink
ERROR at line 1:
ORA-12154: TNS:could not resolve the connect identifier specifiedWhat causes this problem?
Thanks in advance,
Kind Regards,
Dariyoosh

spajdy wrote:
You must have defined DGPAPROD.WORLD in tnsnames.oar on server where you DB is runnig.Hello there,
Thanks a lot for this nice solution. In fact I had to add the connection parameters into the tnsnames.ora file of the server on which the link was created (not the tnsnames.ora of my oracle client stored on the localhost)
After a bit googling I found another solution that allows to create the database link:
CREATE PUBLIC DATABASE LINK SR001_dblink CONNECT TO user IDENTIFIED BY password USING '(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (COMMUNITY=tcp.world)
(PROTOCOL=TCP)(HOST=ip_adresse)(PORT=1521)))(CONNECT_DATA = (SID = GPAPROD)))';Thanks a lot for your help!
Kind Regards,
Dariyoosh
Edited by: dariyoosh on 18 nov. 2009 07:15

Question about Graphics Cards for Adobe and more

Hello, for technical people I'll start by listing some relevant computer info: Asus P9x79Pro Motherboard . Nvidia Quadro 4000 2GB . Windows 7 . Adobe CS6
I have a workstation PC and have been considering ways to improve it. I'm pretty happy with both Memory and Processor, so now I'm looking at the Graphics Card. I got the Quadro specifically because it was listed on Premiere's list of Mercury Accelerated Playback cards. I have no real issues with it, but I'm wondering if I'm getting everything I can out of it. I also use Resolve often and occasionally Maya, but not often. Sometimes these other programs feel sluggish. I'd like a set up that is most optimal for Adobe PPro and AE, but is also good for Resolve. I'm less worries about Maya.
My motherboard can support 4 GPU's, but I've never had more than 1 before. I'm curious how to go about it. What sort of advantages will I get with a second GPU, how will this help me? Since I have a Quadro, should I get another Quadro? Should I run them SLI or run them independently? I've also been looking at the GTX Series, would those be preferable? If so, how should I set up my system, run monitors off 1 and use the other as a GPU boost? I really don't know enough about multi-GPU set ups, and I can't seem to find the answers I'm looking for, so any and all help is appreciated.
Thank you

Tweakers Page - What video card to use?

Question about cookies in OWA package and JSP

Similar Messages

Maybe you are looking for