Store Data on PDA
Hi..
I'm going to develop an Application
for Pocket PC. What is the better way to
store data for it?
(Serialization? I?ve done some tests with this and it took about 3.5 minute / 300 kb to open or save data on PDA... very slow.)
Thanks
I beleive the JVM I have for pocket pc (ipaq 3750) basically has everything in java 1.2, so couldn't you open a filestream and write to the filesystem?
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Store data in R/3 without page refresh
Dear BSP-Masterminds,
we need to store data in R/3 without a recurrent page refresh. The problem is that our engineers are using PDA's and the page refresh is taking too much time. The engineers are changing equipment data on the PDA's. Every time they click on save button, the data get send to the R/3 system and the checking, if the data are correct, takes up to 30 sec. Additional the new page refresh on PDA takes another 20 sec. It would be great to find a solution which stores the data somewhere and by hitting the 'final save-button' the data get checked and saved.
The worst case scenario would be a table of around 600 equipment data, so it might be a huge table that has to be stored somewhere. I thought of a client side cookie but I have no experience if it is possible to store such a big internal table and by the way I don't know if this would be possible on a PDA.
Every little hint is welcome!
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Javascript as such can't do it without refreshing the page. You need to use the AJAX function. But you don't need to be scared about it. Just look at the web logs I've mentioned and you'll understand it quickly.
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Save data on pda project mi7.1
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I able to get data from doe to my pda but how can i pasting data to backend using webdynpro? Any query need to be create under services? I just need to save data to backend table without need the output data.
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Edited by: fcgan on May 3, 2008 4:55 AMPersistent project data needs to be stored in sequence data, NOT in global data or frame data.
Take a look at the examples from the SDK and also the manual, it is explained quite well in there:
GLOBAL, SEQUENCE, AND FRAME DATA
After Effects allows plug-ins to store data at three scopes; global, sequence, and frame. Consider carefully where you store information; choosing poorly can impact performance, or make your plug-in confusing to the user. Use global data for information common to all instances of the effect: static variables and data, bitmaps, pointers to other DLLs or external applications.
Store anything specific to this instance of your plug-in (UI settings, text strings, and any custom data not stored in parameters) in sequence data, Use After Effects’ memory allocation functions.
Frame data is used for information specific to rendering a given frame. This has fallen into disuse, as most machines are capable of loading an entire frame into memory at a time. Of course, your IMAX-generating users will still appreciate any optimizations you can make.
PERSISTENCE
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I have built an application for RT control in a PCI 7041 that executes the main loop at 5 kHz, so cycle time is 200 us. Now I want to save some data generated during execution. I would like to register timestamp and three values per cycle so I'd have four values every 200 us.
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How can i store data in term of a tree structure
how can i store data in term of a tree structure
What a tree is the question. If you just want a fast access, ehats about Hashtable or dictionary classes ? The data there is structured in a tree. For a simple binary tree, you can use something like
class Node {
Node(Object data){
Node left;
Node right;
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void insert(Object data, Node parent){
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if(test < 0 ){
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How to store data in hashmap so that it can be used by different methods.
Hello,
I have an ADF/JSF application and the database is DRM. The program gets data from DRM into this hashmap. Program needs this data frequently. Getting this HashMap is very resource intensive due to a lot of data it has.
I want to get the data in HashMap once ( I can do this - no problem). But where/how do I keep it so that different methods can just use this and not make individual trips to DRM? It may be a very basic java question but I seem to be stuck :)
I am not very concerned about the HashMap part, it can be any collection - the question is of storing it so that it can be used over and over.
Thanks,User,
If I understand you correctly, you have a JSF application that needs to store data in a HashMap such that it can be accessed over and over? You could put the hashmap into an appropriately-scoped managed bean and access it from there. I'm not sure what a "DRM" is (a digital rights management database, perhaps, in which case it's a "database"), so there is something special about a "DRM" that we need to know, please share.
John -
I have an iMac with 2 internal drives and a multiple user account set-up. Hw do I create a path to store data files on the second drive within an application?
This is the Mac mini forum not the iMac forum however...
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If your referring to an application your writing yourself then you need to build a pathname. This can be in one of two styles depending on the programming system your using. This could be a POSIX style path or a Mac style path.
POSIX = /Volumes/volname/foldername
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I have a Time Capsule with 2tb of storage, and an I-Mac with 500Gb. (which is at capacity) Can I use the Time Capsule to store data from my hard drive that I want to access later in addition to backing up the hard drive?
Can I use the Time Capsule to store data from my hard drive that I want to access later in addition to backing up the hard drive?
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When...not if...the Time Capsule disk has a problem, you have no backups for this data.
Perhaps a much safer plan might be to add an external hard drive attached directly to your iMac. Then, move the data to that drive from the iMac.
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I have users in many time zones - each with daylight savings rules - and I want to store dates on the database in UTC/GMT.
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What is the best way to store data to a file? Serialization?
FYI: I am some what of a novice programer. I have almost finished my degree but everything I know about Java is self taught (never taken a course in java). Any way here is my question.
So I have an example program that I have created. It basically just has three textpanes which also have the ability to contain images. Now I would like to learn how to store data to a file for later retrieval and decided to use a program such as this as an example. I am not sure if I should use the serialization API that java has or some other means such as XML. If I used XML I was not sure how to store the image data that would be contained in the text panes. I figured serialization would take care of that if I just serialized my main class and then restored it. So That is that I tried first. Is this a good direction to go?
The problem I am having is that I cant seem to get the serialization to work the way I need it to. I am not sure what I am doing wrong because I have read many tutorials and looked at allot of example code but still dont understand. The tutorial I looked at most is [this one at IBM.|http://java.sun.com/developer/technicalArticles/Programming/serialization/]
The eclipse project folder for my example program can be found here:
[http://startoftext.com/stuff/myMenuExp/]
zipped version:
[http://startoftext.com/stuff/myMenuExp.zip]
The main class is mainwindow.java. I know the source is kinda dirty. Any comments are welcome but I am most interested in how to solve this serialization problem. Thanks
-JamesDrClap wrote:
What will the nature of the data be? Just a handful of strings? A bunch of objects of different types reflecting the current state of your program to great depth and complexity? Something else?The data will be what is contained in three text panes. Each text pane containing rich text and images. For an example take a look at the example program in my first post.
How will the data be used? Just write it out when the app shuts down, and read it all back in when it starts up? Do you need to query or search for specific subsets of the data? Is there any value in the stored form of the data being human-readable?Basically the data will need to be saved when the application shuts down or when the user selects save from the file menu. The data will be restored when the user opens the file from the file menu. It would be nice if the stored data is human readable but its not of primary importance.
How often will the data be written and read? How many reads/writes/bytes/etc. per second/minute? Not often. Just a simple open and save from the file menu.
How large could the data conceivably get?It will probably be a few paragraphs of formated text and less then a dozen images per text pane.
Will reading and writing of the data need to occur concurrently?no.
Do you need to add new data to the storage as your app goes along, or just replace what's there with the most current state?Replace with the most current state of the data.
If it's a simple read once at startup, write once at shutdown, overwriting the previous data, read only by your app, not by humans, then serialization via ObjectInput/OutputStream is probably the way to go. If there are other requirements, you may want to go with XML serialization, a DB, or some other solution.Thanks for the information. Serialization sounds like the way to go. Even if I end up using XML serialization in the end it would still be of interest to me to learn how to use serialization without xml.
I was trying to go with using serialization in be beginning but I cant seem to get it to work. Would you be willing to take a look at my example program. I attempted to implement serialization but it does not seem to work. Could you take a look and see what I am doing wrong. At this point I am stuck as i cant seem to get serialization to work.
I am going to go ahead and mark this thread as answered because I think I already got most of the information I was looking for except what I am doing wrong with my attempt as serialization.
Thank you jverd for your time. -
I can't get them back
What kind of data are you referring to? And when you say "switched .. to store data on icloud..." are you talking about performing backups to icloud vs. to computer or are you in some app that provides a choice of saving data to icloud or to a computer?
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Hello,
I'm acquaring a blood pressure signal and I would like to integrate it from one heart beat until the next beat occure, and so on.
I made a subVI which tells me when the peaks occure and gives me their timestamps.
I will need to calculate the integral of this signal between the two peaks, in real time. So after each pulse, I will get a numeric value representing the integral.
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If I store the data in a numeric array, will I lose the timestamps of each voltage data?
For now since I can't use the sensors, I'm simulating the signal with a sine wave at 1Hz. The BPM detection and timestamps work perfectly; 60 BPM.
I'm getting the dynamic data for the blood pressure signal as you can see.
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RegardsHi simo,
why don't you stick with your original thread?
I already told you how to store data! Use shift register(s)! (And stay away from DDT…)
Best regards,
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Kudos are welcome -
Store data in mysql after reading from excel files
i am trying to make o program where i will read the data from excel files and i will store them in a database. I am using eclipse as editor and mySQL. I am using APACHE POI to read the excel files and JDBC for the connection. The excel files have the structure as shown below:
ID NAME SALARY STREET
321 TIM 1254 14 avenue
121 PAUL 1265 28h oktovriou
432 NICK 4521 papaflessa
I have of course plenty of such files which contains many more rows and columns. The purpose of my program is to read the data, create table named as the name of the excel file and the fields of each table to be the first rows of the excel file. Afterwards the values will be the rest data of the excel file. In the code below i have managed to read them, show the data in the console. Afterwrds i am trying to call a database with JDBC but there i have problem when i create the table.
try
String[] allFields;
String createTableStr = "CREATE TABLE" + createTableStr
+ "(" + org.apache.commons.lang3.StringUtils.join(allFields,
",") + ")";
Could anyone help me?
Thank you in advance!:)
import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Cell;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
public class exam1 {
@SuppressWarnings({ "unchecked", "unchecked" })
static void main (String[] args) throws Exception {
String filename = "C:\\Users\\Efi\\Documents\\test5.xls";
List sheetData = new ArrayList();
FileInputStream fis = null;
try {
fis = new FileInputStream(filename);
HSSFWorkbook workbook = new HSSFWorkbook(fis);
HSSFSheet sheet = workbook.getSheetAt(0);
Iterator rows = sheet.rowIterator();
while (rows.hasNext()) {
HSSFRow row = (HSSFRow) rows.next();
Iterator cells = row.cellIterator();
List data = new ArrayList();
while (cells.hasNext()) {
HSSFCell cell = (HSSFCell) cells.next();
data.add(cell);
sheetData.add(data);
} catch (IOException e) {
e.printStackTrace();
} finally {
if (fis != null) {
fis.close();
showExcelData(sheetData);
@SuppressWarnings("unused")
HashMap<String, String> tableFields = new HashMap();
for (int i=0; i<sheetData.size();i++){
List list = (List) sheetData.get(i);
for (int j=0; j<list.size(); j++){
Cell cell = (Cell) list.get(j);
if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
System.out.print(cell.getNumericCellValue());
}else if(cell.getCellType()==Cell.CELL_TYPE_STRING) {
System.out.print(cell.getRichStringCellValue());
} else if(cell.getCellType()==Cell.CELL_TYPE_BOOLEAN) {
System.out.print(cell.getBooleanCellValue());
if (j < list.size() - 1) {
System.out.print(", ");
private static void showExcelData(List sheetData) {
@SuppressWarnings("unchecked")
private HashMap parseExcelData (List sheetData){
HashMap<String,Integer> tableFields = new HashMap();
List list = (List) sheetData.get(0);
for (int j=0; j<list.size(); j++){
Cell cell=(Cell) list.get(j);
tableFields.put(cell.getStringCellValue(),cell.getCellType());
return tableFields;
@SuppressWarnings({ "unchecked", "unchecked", "unchecked", "unchecked", "unused" })
private String getCreateTable(String tablename, HashMap<String, Integer> tableFields){
Iterator iter = tableFields.keySet().iterator();
String str="";
String[] allFields = new String[tableFields.size()];
int i = 0;
while (iter.hasNext()){
String fieldName = (String) iter.next();
Integer fieldType=(Integer)tableFields.get(fieldName);
switch (fieldType){
case Cell.CELL_TYPE_NUMERIC:
str=fieldName + "INTEGER";
break;
case Cell.CELL_TYPE_STRING:
str= fieldName + "VARCHAR(255)";
break;
case Cell.CELL_TYPE_BOOLEAN:
str=fieldName + "INTEGER";
break;
allFields[i++]= str;
return str;
public Connection getConnection() throws SQLException {
try {
Class.forName("com.mysql.jdbc.Driver");
Connection con = (Connection) DriverManager.getConnection("jdbc:mysql://localhost:3306/kainourgia","root", "root");
Statement stmt = con.createStatement();
try
System.out.println( "Use the database..." );
stmt.executeUpdate( "USE kainourgia;" );
catch( SQLException e )
System.out.println( "SQLException: " + e.getMessage() );
System.out.println( "SQLState: " + e.getSQLState() );
System.out.println( "VendorError: " + e.getErrorCode() );
try
String[] allFields;
String createTableStr = "CREATE TABLE" + createTableStr
+ "(" + org.apache.commons.lang3.StringUtils.join(allFields,
*",") + ")";*
System.out.println( "Create a new table in the database" );
stmt.executeUpdate( createTableStr );
catch( SQLException e )
System.out.println( "SQLException: " + e.getMessage() );
System.out.println( "SQLState: " + e.getSQLState() );
System.out.println( "VendorError: " + e.getErrorCode() );
catch( Exception e )
System.out.println( ((SQLException) e).getSQLState() );
System.out.println( e.getMessage() );
e.printStackTrace();
return null;
}Please don't multipost! Also crossposted: http://www.java-forums.org/jdbc/71612-store-data-mysql-after-reading-excel-files.html
Mod: I'm locking this thread. -
ABAP API to store DATE value in MDM 5.5
Hello All,
Currently I am working on MDM 5.5 and need to have some suggestions on ABAP API Function module to store date values in MDM.
We have interface from where we take the user input which updates the field value back in the MDM.
On the basis of similar scenario we have "DATE" field on the interface which will update the date and time in MDM, also we are making use of ABAP API for development.
The problem is that data type mismatch is happening between MDM and ABAP API,please let me know which ABAP API Function module should we use which simply accepts the DATE and TIME for every single record.
Source code provided will be much more appreciable.
Regards,
SwapnilHi Swapnil.
In the same link provided by Sudhanshu, can you navigate to the node "Retrieving Complex Types".
It has sample codes and MDM interfaces for TimeStamp, Time Stamp, User Stamp, Literal Date, Literal Time etc.
As suggested, you can also try to use the type MDM_CDT_DATE_TIME.
See the sample code provided in the link as below:
Type: MDM Literal date:
CLEAR lv_date.
CONVERT TIME STAMP ls_result_ddic_ex-fieldliteraldate-content TIME ZONE sy-zonlo INTO DATE lv_date.
WRITE: AT (10) lv_date, '|'.
Type: MDM Literal time:
CLEAR lv_time.
CONVERT TIME STAMP ls_result_ddic_ex-fieldliteraltime-content TIME ZONE sy-zonlo INTO TIME lv_time.
WRITE: AT (10) lv_time, '|'.
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Bala -
How to store data (in tdm files)
I'm looking for advice on how to store data in tdm/tdx files.
The main challenge is like this: At regular time intervals there is new data available (say every 10 minutes there are 10 minutes of new data available). All data is time based. So every ten minutes I may create a new tdm/tdx file containing this data segment. However, when i want to analyze the data i dont necessarily want to view 10 minutes of data from all channels, but maybe 20 hours of data from one particular channel.
The way I've achieved this so far is to manually load each 10 minute segment of this particular channel and then add these parts together. This is both time consuming and cumbersome. Is there a better way to do this that I've simply not discovered yet? Is there a better way to store data to simplify this process?
One solution is of course to save data from several 10-minute frames in one file, but seeing as there is a never ending supply of data i cant simply save all data in one giant file, it has to be split up at some point, and the problem will still remain.
One factor to have in mind here is that this is rather large amounts of data (maybe 10GB each day), so the option to simply load all the data into memory goes out the window rather quickly.
Feel free to ask if I've not made myself very clearHi salte,
If your test ever ended, and if you had LabVIEW 8.20 or higher, I would recommend using a TDMS file, which handles data appeands flawlessly. DIAdem 10.1 now also does data reduction and index windowing during file loading for TDM / TDMS / DataPlugin files, so that you could easily load out only the part of the file you wanted to look at. But since you describe your data acquisition as never stopping and amassing 10 GB per day, I agree that it would be impractical to use only 1 data file. So we are stuck with some number of files which each contain a part of your measurement. This approach can have advantages, since you can save operational properties for each "buffer" such as average value, dominant frequency, ambient room temperature, etc., and later on you can use the DataFinder to query out only the data buffers which meet specific conditions based on these properties. The problem remains to load and assemble data based on multiple files. This is an old problem in DIAdem, and one for which I have an efficient and I hope satisfactory workaround application. It does what you describe already doing in the minimum amount of time and with the minimum amount of user interaction, and it can be highly parametrized to suit your particular situation. The ideal way to start the application would be as part of a ResultsList custom menu. This would enable you to query out the buffers you wanted, highlight those rows in the ResultsList, right-click and choose your custom menu, and WHAM! the selected buffers for your queried channel(s) are automatically appended together in the DataPortal. Launching from a ResultsList custom menu would mean that you could skip the file dialog and just read out the data sources directly from the ResultsList selection.
Let me know what you think,
Brad Turpin
DIAdem Product Support Engineer
National Instruments
Attachments:
Importing Data from Multiple DataPlugin Files.zip 198 KB
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