Reading from resource file in JSP

I'm trying to create a help system in an application I'm working on. I've created a javascript method that onloading of the page goes and attaches onclick events to all the fields with a particular class. That function needs to use the id of that node to look up a message from the resource.properties.
My issue is I'm trying to make the resource.properties available to my javascript. I realize that the messageBundle is server side and javascript is not, but I was hoping I could iterate through the messages and create a javascript array of the messages by embedding javascript variable declaration inside the forEach loop.
The reason I'm doing it this way is I want to just be able to go through and aed an ID to the field on all my pages that I want to add help for. I don't want to have to have to build an onclick event for each and every field.
Any ideas or suggestions?
I went so far as trying to load a map of messages in through java, but the MessageResources class doesn't have an iterator.

I was doing ResourceBundle
test = ResourceBundle.getBundle("....resources.properties");
instead of
test = ResourceBundle.getBundle("....resources");
Thanks for the help

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How to read from excel file and write it using implicit jsp out object

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If you want to copy files as fast as possible, without processing them (as the DOS "copy" or the Unix "cp" command), you can try the java.nio.channels package.
import java.nio.*;
import java.nio.channels.*;
import java.io.*;
import java.util.*;
import java.text.*;
class Kopy {
     * @param args [0] = source filename
     *        args [1] = destination filename
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How to read from properties file

Hi,
I am using JSR 168.
while creating a new portlet, a folder gets created with the name as "portlet". Under which is resource package and <PortletName>Bundle.java.
pls tell me how to read from .properties file.
waiting eagerly for some reply
Thanks & Regards,
HP
Edited by: user9003827 on Apr 13, 2010 3:42 AM

I think i have mixed it up :)
I have looked at it again and believe you are using regular JSP portlets.
Can you tell what you want to achieve by reading .properties file. Are you meaning the preferences of the portlet or what exactly are you trying to do?
Reading propertie files is easy:
// Read properties file.
Properties properties = new Properties();
try {
properties.load(new FileInputStream("filename.properties"));
String myKey = properties.getProperty("yourKey");
} catch (IOException e) {
}Edited by: Yannick.O on 13-Apr-2010 05:52

"Read From Binary File" function Help ambiguity

I must be getting tired, but for some reason a doubt crept in my mind as I was designing a new piece of code this morning:
"is the "Read From Binary File" using the last file position or is it starting from the beginning of the file?"
"That's a stupid question", I told myself.
"I used this function a million times and have always assumed it is reusing the last file position. Moreover, there is no file offset input to that function, so WTH am I afraid of?"
So, for kicks, I fired up the Help window and read the following description (*):
Reads binary data from a file and returns it in data. How the data is read depends on the format of the specified file. This function does not work for files inside an LLB.
(*) BTW, has anybody ever complained that you can't select and copy anything from the floating Help Window?
Not much there. I particularly admire the phrasing of the second sentence... What about: "This function can do a lot of things, but it would much to complex to describe this is extensive details, so if you are asking, you probably can't afford using it"?
Anyhow, I clicked on the "Detailed Help" and got this (among other things):
Use the Set File Position function if you need to perform random access.
WHAT? I am pretty darn sure I DO NOT USE the Set File Position when I read a file in successive and contiguous chunks. I just pass the file refnum into a shift register and back to the function and that's it.
Now, the description of the "Refnum Out" ouput says: If file is a refnum or if you wire refnum out to another function, LabVIEW assumes that the file is still in use until you close it. Translated in plain English, is that supposed to mean that if the file is not closed it is open, or is that implying that it contains more info that just "the file is open and can be found here"?
I started searching around and finally ended up with the entry for "refnums, file I/O". Down the bottom of the (long) article, I found this under the heading "References to Objects or Applications" (but nothing specific to files, BTW):
...LabVIEW creates a refnum associated with that file, device, or network connection...
[...] LabVIEW remembers information associated with each refnum, such as the current location for reading from or writing to the object and the degree of user access, so you can perform concurrent but independent operations on a single object. If a VI opens an object multiple times, each open operation returns a different refnum. LabVIEW automatically closes refnums for you when a VI finishes running, but it is a good programming practice to close refnums as soon as you are finished with them to most efficiently use memory and other resources.
So it seems that my recollection was correct. I do not know what the "degree of user access" for a file is, but that's not the topic of today's post.
So, my point is: the Help File for this function is incomplete or ambiguous at best. Please correct it. And provide a link to the "refnum, file I/O" Help entry in its detailed Help. It would H E L P...
Thanks for reading.

Reading in succesive chunks is *NOT* random access. An open file always has
a current position, which is updated with each read or write operation.
You only need to set the file position if you want to start elsewhere.
LabVIEW Champion . Do more with less code and in less time .

How to read from text file?

I would like to read data (frequencies) already written in a text file. I will need read these frequencies one at a time to set the function generator (as part of my data acquisition application), acquire data that is in turn written to a file and then go back and read the next frequency from the file to repeat the process again. I also have another idea of doing the same, which is read all the frequencies from the text file and populate a table and a frequency value is picked from the table each time to go through the process mentioned above.
Can anyone suggest the following: (1) How to read from a text file, (2) What could be the most efficient way of solving my above problem.
I am a new LabVIEW user and any help will be appreciated.

Hi Research,
Depending on the format of the data file, there are a few options for reading it. If it is tab delimited, you may want to use the Read from SpreadSheet File VI which will read the file into an Array. You can then use the Index Array VI to pull out individual entries. If the files is ASCII but not tab delimited, you could use the regular Open File and Read File VIs. You can either read the file out piece by piece, or read the entire file into a string and then use the Match Pattern VI to parse out the different elements (there are actually many ways to do this - check out the Strings subpalette).
Since you're new to LabVIEW, you may want to check out these resources:
Three Hour Introduction to LabVIEW
Six Hour Introduction to LabVIEW
Getting Started with LabVIEW
I hope this helps! Let us know if you have more questions,
Megan B.
National Instruments

Help: Servlet can't read from properties file

I am working on a web application running in Tomcat on Linux.My java source file reads some parameters from a properties file (data.properties)in the same directory. This works well in a simple application. However, if it is used in the Tomcat environment, it can't be read by a servlet file (LoginServlet.java). I put both the "LoginServlet.class" and "data.properties" in the following directory: /webapps/myapp/WEB-INF/classes. When I run the web application in Tomcat, the error is "data.properties not found". What is the problem? Do I need to modify my "web.xml" and/or Tomcat's "server.xml"? If so, how to modify them?
This web application contains a lot of serlets. So I don't want to hardcode the parameters into the servlet codes.
Any info will be appreciated. Thanks in advance!:)

Putting the properties file in webapps/myapp may or may not help.
My assumption is that you are trying to open the file by brute force, with something like
InputStream propis = new FileInputStream ("data.properties");
Properties props = new Properties ( );
props.load (propis);
What you want is to have the class loader find a file in the same place as the class file, and give you back an input stream reading from that file, which you can then pass to the Properties.load(InputStream) method. This is called a "resource," and the way to do it is:
InputStream propis = getServletContext().getResourceAsStream("data.properties");
// remaining code as above
This will cause the class loader for the servlet context (a/k/a the Web application) to find the file in the same manner as it might find a class, but instead of treating it as compiled JVM code, and loading it, it simply passes you back an InputStream from which you do whatever you want.
Cheers!
Jerry Oberle
perl -e 'printf "mailto%cg%s%cearthlink%cnet\n", 58, "oberle", 64, 46;'

UPDATE : Toshiba Recovery Wizard 'cannot read from source file or disk' error (satellite L500)

UPDATE 2: Phoned Toshiba tech support again, guided by techie to begin the recovery again. Just before phoning I was able to go into recovery options and view the drive setup and all the files that couldn't be read are on the CD so I've no idea why the error kept occuring, and neither did the techie. Fingers crossed it works this time but I'm not overly hopefully given that we've just done exactly the same as I did before. UPDATE 1: I got into the BIOS and reset everything back to defaults and yay, my toshiba recovery wizard now starts! :-D On the down side, when trying to do a factory default software / out of the box recovery I continually get error messages with regards to copying the files, for example
cannot read from source file or disk
7z.dll
Type application extension
size 585kb
date modified 7/14/2009 10.26pm
other read / copy errors include PREINST6.SWM, BOOT_32, BOOTPRIORITY, CHECKMAXPTSIZE, CHGBOOT, CPU, CPUCHECK, CREATEPARTITION, CTRLDRVINFO, DISKWIPE, DMI, DPINST32, EBLIB.DLL, ERRORDIALOG, EW3BOOTSEQ, FWLINK, FWLINK.SYS, GETHDDINFO, GETKEYSTATE, IMAGEX, INFILED, INITRECAREA, KRAIADAPI.DLL ..... at which point I decided to 'skip all' :-/
Any explanations as to what's going on and how I might be able to fix it would be very much appreciated! :-) Thank you!
I have a two and half year old satellite L500 with an Intel i-3 and 4 gigs of RAM, on which I was running Windows 7.
Admittedly it’s had rather a hard life (I ran some very demanding CAD / graphics software on it) but it had always performed well until just recently, when after suffering several BSOD (which had never happened before), the hard drive failed.
I partitioned and formatted a brand new hard drive (which is perfectly fine and functions normally when hooked up to another laptop with a SATA to USB cable) and obtained system recovery discs from Toshiba. Unfortunately, when I try and run the first disc, windows starts to load files but then generates an error screen with the message Error F3-F100-0003 and a request to turn the computer off.
When I use the windows Memory Diagnostic to get into the Windows Boot Manager Screen I get the following;
Windows failed to start. A recent hardware / software change might be the case.
To fix the problem
Insert your windows installation disc and restart your computer
Choose your language settings and click ‘next’
Click ‘repair your computer’
File: \boot\memtest.exe
Status: 0xc000000f
Info: the selected entry could not be loaded because the application is missing or corrupt.
I can also use F8 on startup to get into the advanced boot options but selecting any of them simply results in the F3-F100-0003 error message. I’ve run a memory test using the UBCD, which tells me the memory is fine, and tried another hard drive (which also works perfectly well in another laptop) but no joy. On phoning Toshiba support the techie said my hard drive had failed, but as I say, both hard drives are perfectly fine / usable when hooked up to another laptop. I’m now completely stuck as to what the problem is and how I might resolve it – any advice / suggestions would be most gratefully received! Thank you in advance :-)

Satellite L655-S5096
Downloads here.
the second disc gives me the the "cannot read from source file or disk PREINST8.SWM"
My best guess is that the disc is not readable. Try copying it to another. Sometimes that works.
Otherwise, order new discs from Toshiba.
-Jerry

Cannot delete itunes from pc,message states. a network error occurred while attempting to read from the file C:\windows\installer\itunes.msi

ITUNES WILL NOT DELETE FROM ADD @ REMOVE PROGRAMS,
MESSAGE, READS a network error occured while attempting to read from the file C:WINDOWS\installer\iTunes.msi

All sorted now just needed to repair itunes from control panel

Why does Read from Text file default to array of 9 elements

I am writing to a text file starting with a type def. cluster (control) of say 15 dbl numeric elements, that works fine I open the tab-delimited text file and all of the elements appear in the file. However when I read from the same text file back to the same type def. cluster (indicator), the read from text file defaults to 9 elements?? Is there a way to control how many elements are read from the file. This all works great when I initially use a cluster of 9 elements and read back to a cluster of 9 elements.
Solved!
Go to Solution.

From the LabVIEW Help: http://zone.ni.com/reference/en-XX/help/371361G-01/glang/array_to_cluster/
Converts a 1D array to a cluster of elements of the same type as the array elements. Right-click the function and select Cluster Size from the shortcut menu to set the number of elements in the cluster.
The default is nine. The maximum cluster size for this function is 256.
Aside: so, how many times has this question been asked over the years?

How to open saved files using 'read from text file' function

Hi everyone, I am having a hard time trying to solve the this particular problem ( probably because I am a newb to lanbview ). Anyway , I am able to save the acquired waveforms by using the 'Write to text file' icon. I did manually modify the block diagram of the 'Write to text file' icon and create the correct number of connector so as to make my program work. But now I have no idea on how to modify the block diagram of the 'Read from text file' block diagram to make my program 'open' my saved waveforms. Or i do not have to modify anything from the block diagram of the 'Read from text file'? Can anyone teach/help me connect up? Do i need the build array on the "open" page?
Here are some screenshots on part of my program
let me know if you guys would need more information / screenshots thank you!
Attachments:
ss_save.jpg ‏94 KB
ss_open.jpg ‏94 KB
modified_writetotextfile.jpg ‏99 KB

Ohmy, thanks altenbach. oh yeah i forgot about those sub VIs. will upload them now. Was rather demoralized after reading the comments and really struck me on how weak i'm at on labview really hope to get this done. But of course i have to study through and see how it works. Actually i am going to replace those 'signal generators sub vi' with ThoughtTechonology's sample code so i can obtain data waveforms real-time using Electrocardiography (ECG) ,Electromyography (EMG ) and Electroencephalography (EEG) hopefully i can find out how to connect the sample code.
( ps . cant connect it now unless my program is working otherwise labview will crash )
( p.s.s the encoder of my biofeedback trainer already acts as an DAQ so i wont need to place an DAQ assistant in my block diagram i suppose )
The sample code of ThoughtTechnology is named as attachment.ashx.vi. too bad i cant use it and present it as my project
Attachments:
frequency detactor.vi ‏53 KB
signal generator.vi ‏13 KB
attachment.ashx.vi ‏40 KB

LabVIEW for ARM 2009 Read from text file bug

Hello,
If you use the read from text file vi for reading text files from a sdcard there is a bug when you select the option "read lines"
you cannot select how many lines you want to read, it always reads the whole file, which cause a memory fault if you read big files!
I fixed this in the code (but the software doesn't recognize a EOF anymore..) in CCGByteStreamFileSupport.c
at row 709 the memory is allocated but it tries to allocate to much (since u only want to read lines).
looking at the codes it looks like it supposed to allocated 256 for a string:
Boolean bReadEntireLine = (linemode && (cnt == 0));
if(bReadEntireLine && !cnt) {
  cnt = BUFINCR;    //BUFINCR=256
but cnt is never false since if you select read lines this is the size of the file!
the variable linemode is also the size of the file.. STRANGE!
my solution:
Boolean bReadEntireLine = (linemode && (cnt > 0)); // ==
if(bReadEntireLine) {    //if(bReadEntireLine && !cnt) {
  cnt = BUFINCR;
and now the read line option does work, and reads one line until he sees CR or LF or if the count of 256 is done.
maybe the code is good but the data link of the vi's to the variables may be not, (cnt and linemode are the size of the file!)
count should be the number of lines, like chars in char mode.
linemode should be 0 or 1.
Hope someone can fix this in the new version!
greets,
Wouter
Wouter.
"LabVIEW for ARM guru and bug destroyer"

I have another solution, the EOF works with this one.
the cnt is the bytes that are not read yet, so the first time it tries to read (and allocate 4 MB).
you only want to say that if it's in line mode and cnt > 256 (BUFINCR) cnt = BUFINCR
the next time cnt is the value of the bytes that are not read yet, so the old value minus the line (until CR LF) or if cnt (256) is reached.
with this solution the program does not try to allocate the whole file but for the max of 256.
in CCGByteStreamFileSupprt.c row 705
if(linemode && (cnt>BUFINCR)){
cnt = BUFINCR;
don't use the count input when using the vi in line mode. count does not make sense, cnt will be the total file size. also the output will be an array.
linemode seems to be the value of the file size but I checked this and it is just 0 or 1, so this is good
update: damn it doesn't work!
Wouter.
"LabVIEW for ARM guru and bug destroyer"

Trying to parse a file-read from text file.vi

I'm attempting to read a txt file that has tab separated data. In the fourth (or any) column is the only data I need. The data is a string of numbers (23.454).
I've used the Read from Text File.vi and the Read From Spreadsheet.vi and I just don't seem to have enough LV background to extract the pertinent data into a graph. any suggestions?

(It is silly to use "delete from array" if all you want is a column. The correct function is "index array")
Joe's idea above basically works fine. Here's a quick adapdation (the node before the graph is "index array" from the array palette.).
Message Edited by altenbach on 06-11-2007 11:57 AM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
FileRead.png ‏11 KB

Set a timeout for "read from text file"

I Need to read from a text file on a remote pc and use the read from text file function to do this. It wotks but sometimes this pc is down causing long wait times in my vi.
Is there a way to set a timeout for the read from text file function, or is there an other solution?
Thank you

You could check that the path is valid first before you attempt to read the file. hen put the file read in a True-False case structure based on the results of the check. You can use the function "Check if File or Folder Exists" It checks whether a file or folder exists on disk at a specified path. This VI works with standard files and folders as well as files in LLB files. The function is found in the File I/O --> Advanced File Functions palette.
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Read from text file vi won't read file...

I am very new to LV programming so I hope you forgive any stupid mistakes I am making.   I am using Ver. 8.2 on an XP machine.
I have a small program that stores small data sets in text files and can update them individually or read and update them all sequentially, sending the data out a USB device.   Currently I am just using two data sets, each in their own small text file. The delimiter is two commas ",,".
The program works fine as written when run in the regular programming environment. I noticed, however, as soon as I built it into a project that the one function where it would read each file sequentially to update both files the read from text file vi would return an empty data set, resulting in blank values being written back into the file. I read and rewrite the values back to the text file to place the one updated field (price) in it'sproper place. Each small text file is identified and named with a 4 digit number "ID".   I built it twce, and get the same result. I also built it into an installer and unfortunately the bug travelled into the installation as well.
Here is the overall program code in question:
Here is the reading and parsing subvi:
If you have any idea at all what could cause this I would really appreciate it!
Solved!
Go to Solution.

Hi Kiauma,
Dennis beat me to it, but here goes my two cents:
First of all, it's great to see that you're using error handling - that should make troubleshooting a lot easier. By any chance, have you observed error 7 when you try to read your files and get an empty data set? (You've probably seen that error before - it means the file wasn't found)
If you're seeing that error, the issue probably has something to do with this:
Relative paths differ in an executable. This knowledge base document sums it up pretty well. To make matters more confusing, if you ever upgrade to LabVIEW 2009 the whole scheme changes. Also, because an installer contains the executable, building the installer will always yield the same results.
Lastly, instead of parsing each set of commas using the "match pattern" function, there's a function called "spreadsheet string to array" (also on the string palette) that does exactly what you're doing, except with one function:
I hope this is helpful...
Jim

'read from text file' erases the file

I am trying to read text in from a text file. This is the exact code I am using. For some reason the output from 'read from text file' contains all the text that was originally in the file, but after the code executes the file is empty. I have several other vi's which use the same code and the file is fine. But whenever I run this code in this one specific vi the text file gets erased.

What is in the rest of that "specific vi"? I just tried the code you show, in v2011, and it works as expected, doesn't clear file.
What version are you running? Can you add an error out, or make sure error output is on in your LabVIEW configuration?
Putnam
Certified LabVIEW Developer
Senior Test Engineer
Currently using LV 6.1-LabVIEW 2012, RT8.5
LabVIEW Champion

Reading from resource file in JSP

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