How to read data from Linux named pipes using java?

In linux box I want to get data from a named pipe(created using "mkfifo <filename>".
How I can read the incoming data from the named pipe?

there are some caveats though: if i remember correctly, when you reach the end of data in a fifo it will look like end-of-file and that may confuse some classes. So your mileage may vary

Similar Messages

How to read data from the excel file using java code.

Hi to all,
I am using below code to getting the data from the excel file but I can't get the corresponding data from the specific file. can anyone give me the correct code to do that... I will waiting for your usefull reply......
advance thanks....
import java.io.*;
import java.sql.*;
    public class sample{
             public static void main(String[] args){
                  Connection connection = null;
                      try{
                           Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
                           Connection con = DriverManager.getConnection( "jdbc:odbc:Mydsn","","" );
                           Statement st = con.createStatement();
                           ResultSet rs = st.executeQuery( "Select * from [Sheet1$]" );
                           System.out.println("sample:"+rs);
                              ResultSetMetaData rsmd = rs.getMetaData();
                              System.out.println("samplersd:"+rsmd);
                           int numberOfColumns = rsmd.getColumnCount();
                              System.out.println("numberOfColumns:"+numberOfColumns);
                               while (rs.next()) {
                                        System.out.println("sample1:"+rs);
                                        for (int i = 1; i <= numberOfColumns; i++) {
                                             if (i > 1) System.out.print(", ");
                                             String columnValue = rs.getString(i);
                                             System.out.print(columnValue);
                                        System.out.println("");
                                   st.close();
                                   con.close();
                                  } catch(Exception ex) {
                                       System.err.print("Exception: ");
                                       System.err.println(ex.getMessage());
                    }

1: What is the name of the excel sheet?
2: What is printed in this program? null ? anything?
error?Excel file name is "sample.xls" I set excel file connectivity in my JDBC driver(DSN). Here in my program I am not giving that excel file name. I am giving only that excel sheet name. that is followed
ResultSet rs = st.executeQuery( "Select * from [Sheet1$]" );The output of this program is given bellow.
sample:sun.jdbc.odbc.JdbcOdbcResultSet@1b67f74
samplersd:sun.jdbc.odbc.JdbcOdbcResultSetMetaData@530daa
numberOfColumns:2

How to read data from a router by using labview

I am a beginner labview. How to read data from a router by using labview ?

What kind of data are you trying to read?
Does the router behave like a webserver that you log into? If so, search the forums for threads discussing HTML.

How can read data from my local PC using JDBC adapter

Hi experts.
Actually we don't have permissions to work on RDBMS. So by locally I have Oracle8.0 installed in my pc. so can i update the table in my database via JDBS adapter. If so please describe how and where can I find the connectivity between XI server and my local DB system.
Thanks.

The first question is: Can the XI access your local PC?
In most environments this is not possible.
Connect to the server where the XI is installed and log on with the <sid>adm user (or let an administrator do this). Try to ping your PC.
If this is successful, you have a good chance to connct your database. Follow the description in your database manual, which parameters you need to enter in the JDBC adapter channel.
Regards
Stefan

How to read data from a CLUSTER STRUCTURE not cluster table.

Hi,
how to read data from a CLUSTER STRUCTURE not cluster table.
regards,
Usha.

Hello,
A structre doesnt contain data.. so u cannot read from it. U need to find out table of that structure and read data from it.
Regards,
Mansi.

How to read data from a file that was formatted by excel?

Hi everyone, I'm familiar with java.io and the ability to read from files, can anyone tell me how to read data from a file that was formatted by excel? Or at least give me some web references so that I can learn about it?

http://jakarta.apache.org/poi/hssf/index.html
HSSF stands for Horrible Spreadsheet Format, but it still works!

How to read data from a connected modem

any one can help me? how to read data from a connected modem. The modem received real-time data from other server. The data is in text format. I can see this text when I used hyperterminal for dial up and the data is accumulated such as:
@aa1235678
@bb2135647
@cc5214367
since it is real-time data, I want to read one line each time instantly when it arrives.

You need to use the Java Communications API. (http://java.sun.com/products/javacomm/index.html)

How to read data from a zipped MS Access file?

How to read data from a zipped MS Access file?

RPJ,
You do not need to use the Close Zip File.vi when you unzip a folder. This VI is used when you are creating a zip folder.
As for examples, I found a couple of ActiveX based MS Access examples. These programs look to be pretty basic. For more in depth example I would search Microsoft Developers Network
http://zone.ni.com/devzone/cda/epd/p/id/2188
http://zone.ni.com/devzone/cda/epd/p/id/1694
Regards,
Jon S.
National Instruments
LabVIEW R&D

How to read data from an internal table into a real table?

Hello experts,
I'm relatively new to ABAP and I'm trying to figure out how to read data from an internal table into a table that I created. I'm trying to use the RRW3_GET_QUERY_VIEW_DATA function module to read data from a multiprovider. I'm trying to read data from the e_cell_data and e_axis_data tables into a table that I've already created. Please see code below.
TABLES MULTITAB.
DATA:
query_name TYPE RSZCOMPID,
s_cubename TYPE RSINFOPROV,
t_cell_data TYPE RRWS_T_CELL,
t_axis_data TYPE RRWS_THX_AXIS_DATA,
t_axis_info TYPE RRWS_THX_AXIS_INFO,
wa_t_cell_data like line of t_cell_data,
wa_t_axis_data like line of t_axis_data,
w_corp_tab like line of t_cell_data.
s_cubename = 'CORP_MPO1'.
query_name = 'Z_corp_test'.
    CALL FUNCTION 'RRW3_GET_QUERY_VIEW_DATA'
       EXPORTING
         i_infoprovider           = s_cubename
         i_query                  = query_name
        i_t_parameter            = query_string_tab
       IMPORTING
         e_cell_data              = t_cell_data
         e_axis_data              = t_axis_data
         e_axis_info              = t_axis_info.
If anyone has any information to help me, I would greatly appreciate it. Thanks.

Hi,
<li>Once you call the function module RRW3_GET_QUERY_VIEW_DATA, lets say data is available in the corresponding tables e_cell_data e_axis_data which you have mentioned.
<li>Modify your internal table defined for other purpose, with data from e_cell_data e_axis_data like below.
LOOP AT t_cell_data INTO wa_t_cell_data.
"Get the required data from t_cell_data.
MOVE-CORRESPONDING wa_t_cell_data TO it_ur_tab.
"Modify your internal table wih data
MODIFY it_ur_tab TRANSPORTING <field1> <field2> <field3>.
ENDLOOP.
LOOP AT t_axis_data INTO wa_t_axis_data.
"Get the required data from t_cell_data.
MOVE-CORRESPONDING wa_t_axis_data TO it_ur_tab.
"Modify your internal table wih data
MODIFY it_ur_tab TRANSPORTING <field1> <field2> <field3>.
ENDLOOP.
Thanks
Venkat.O

Help me, How to read data from USB ???

Help me, How to read data from USB ???

If its a disk on key or some portable hard drive than once its connected to the usb and recognized by the system you can access it through java like you would access your hard drive.

How to read data from database to applet

hi i am writing a program below which reads data from mysql database successfully ;
import java.sql.*;
import java.lang.*;
import java.util.*;
public class Read_Capital_country_from_database {
public static void main (String args[] ){
int index,mess;
String country_arr[] = new String[250];
String capital_arr[] = new String[250];
int i = 0 ;
String URL = "jdbc:mysql://localhost/allusers";
String user = "shadab";
String password ="shadab@123";
try {
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection(URL,user,password);
for( SQLWarning warn = conn.getWarnings(); warn != null; warn = warn. getNextWarning() )
System.out.println( "SQL Warning:" ) ;
System.out.println( "State : " + warn.getSQLState() ) ;
System.out.println( "Message: " + warn.getMessage() ) ;
System.out.println( "Error : " + warn.getErrorCode() ) ;
String sql = "select * from country_capital";
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(sql);
while( rs.next() ) {
System.out.println( rs.getString(1) );
System.out.println(" " +rs.getString(2) );
System.out.println();
catch (SQLException se){
System.out.println( "SQL Exception:" ) ;
System.out.println("Exception - raju");
while( se != null )
System.out.println( "State : " + se.getSQLState() ) ;
System.out.println( "Message: " + se.getMessage() ) ;
System.out.println( "Error : " + se.getErrorCode() ) ;
se = se.getNextException() ;
catch( Exception e )
System.out.println( e ) ;
java Read_Capital_country_from_database
OUT PUT OF ABOVE PROGRAM IS :
INDIA NEW DELHI
PAKISTAN ISLAMABAD
AFGHANISTAN KABUL
BUT SAME PROGRAM WHEN I GO TO WRITE IN APPLET
THIS TIME APPLET DOES OPEN BUT ERROR SHOWS ON STANDARD OUT PUT
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
THIS IS THE PROGRAM WRITTEN FOR JAVA APPLET
import java.sql.*;
import java.lang.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class Read_Capital_country_from_database extends Applet {
Choice country, capital;
String msg=" ", msg1;
int index,mess;
String country_arr[] = new String[250];
String capital_arr[] = new String[250];
char chr;
int i = 0;
public void init() {
country = new Choice();
capital = new Choice();
String URL = "jdbc:mysql://localhost/allusers";
String user = "shadab";
String password ="shadab@123";
try {
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection(URL,user,password);
for( SQLWarning warn = conn.getWarnings(); warn != null; warn = warn. getNextWarning() )
System.out.println( "SQL Warning:" ) ;
System.out.println( "State : " + warn.getSQLState() ) ;
System.out.println( "Message: " + warn.getMessage() ) ;
System.out.println( "Error : " + warn.getErrorCode() ) ;
String sql = "select * from country_capital";
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(sql);
while( rs.next() ) {
country_arr[i] = rs.getString(1);
country.add(country_arr);
capital_arr[i] = rs.getString(2);
capital.add(capital_arr[i]);
i++;
catch (SQLException se){
System.out.println( "SQL Exception:" ) ;
System.out.println("Exception - raju");
while( se != null )
System.out.println( "State : " + se.getSQLState() ) ;
System.out.println( "Message: " + se.getMessage() ) ;
System.out.println( "Error : " + se.getErrorCode() ) ;
se = se.getNextException() ;
catch( Exception e )
System.out.println( e ) ;
add(country);
add(capital);

It doesn't make sense to read a database directly from an applet. If an applet needs data from a database is should request if from the server which the applet is located on and the server should do the actual database actions.
The whole point of applets is that they require no installation on the client machine. If you have to change policy files or the like, you might as well install a Swing application. Furthermore accessing a database tends to depend on how the client is set up on the network. Any sensible network has firewall settings that block access to the database ports to any external access (and, again, if you are limiting the facility to a few internal machines then why not just install a program on them).

JTable, how to read Data from it when enter is pressed

How to read Data from JTable on Return or lost focus from cell.
Also please tell me which listener I should should.
thx for help

You should read the tutorial about tables, cell editors and models.
Also you should not [url http://forum.java.sun.com/thread.jsp?thread=472677&forum=57&message=2186815]crosspost
Mike

How to exctract data from a report to use it in a process

Hi! I would like to know how to exctract data from a report to use it in a process. Let's say that I have a report which have following fields: id_person, name_person. And then, I want to make a process which introduce the id_person (from report) into an associative tabel. How can I reffer to the fields from my report?
I was thinking about something like that( this should be the code from my process)
insert into associative_table(id_person)
values(id_person) or
insert into associative_table(id_person)
values(Report_name.id_person) but it doesn't work....
Thank you very much.

Another option, use collections.
Create an on load process that loads all the rows you would have in your report into a collection:
begin
HTMLDB_COLLECTION.CREATE_OR_TRUNCATE_COLLECTION(
p_collection_name => 'ASSIGNED_CALENDAR_CONTACTS' );
for x in (SELECT CONTACT_ID, CONTACT_FNAME, CONTACT_LNAME
FROM CONTACT
WHERE InStr( pkg_CalendarMgr.f_FetchContactIDsForDay( TO_DATE( :P3_CALENDAR_DT, 'YYYYMMDD' ), 'OF' ), CONTACT_ID ) > 0 )
loop
htmldb_collection.add_member(p_collection_name => 'ASSIGNED_CALENDAR_CONTACTS',
p_c001 => x.CONTACT_ID,
p_c002 => x.CONTACT_FNAME,
p_c003 => x.CONTACT_LNAME);
end loop;
end;
Then, instead of your report selecting from the table, have it select from the collection, this way your display will match what's in the collection:
SELECT c001, c002 || Chr(32) || c003 CONTACT_NAME, 'Remove' remove
FROM htmldb_collections
WHERE collection_name = 'ASSIGNED_CALENDAR_CONTACTS'
ORDER BY c003, c002
Then you can have a button on the form that steps through the collection, one element at a time and does whatever you want it to.

How to read data from a file in OSB

hi guys,
Recently, I've got a problem with reading file from specific location. I've actually followed this post OSB 11g - Read or Poll File in OSB - Oracle Fusion Middleware Blog, and then
I know how to read a file. However, it does not as expected. Because, I've found no way to read data from the file. Therefore, no chance to manipulate the data like assigning to a variable, or extracting ....
Hence, is there any way to read data from file by using proxy service in OSB ??? No Java code ???
by the way, supposed that there is no way to read data from a file in OSB. So, What purposes will the way in the post above be used for?
Many thanks in advance

http://jakarta.apache.org/poi/hssf/index.html
HSSF stands for Horrible Spreadsheet Format, but it still works!

How to Read Data from a table (horizontal axsis) in an existing report

Hi to all,
I've a question. I must read the data in a table of an existing report. I develope with BO XI 3.0
I don't know how to reach the table in my report from SDK.
this is my code:
reports = document.getReports();
rep = reports.getItem(0);
the report has the title and a table horizontal axsis.
I must read the column name(header column) of the table and all rows for retrieving values.
Thank u in advance for your attention.

hi ChinMay,
thank u for your answer.
I would like to ask u if Ireport refers crystal reports, while i mean to read data from a webi report.
I've tried in many manners to read this data and i've read the SDK, but i'm unable to reach the table of my report for reading its rows. i'm able to export in XML format, i'm able to get reportelement , block, but in the java's example of SDK its not present how to obtain the reportbody and subsequently the section or directly a table. the example that i've seen show that if u create a new report u can create the reportbody, the section, the table and others. But don't show how to obtain this from an existing report.
Probably i don't understand very well all the SDK structure and i think that is possbile to read a table(with horizantal axis) in a report without section only passing by the ReportBody.
I know that u don't have so time to spent for things that are in the SDK, but if it's possible to have ten rows of sample about this question i'll be very happy.
If it's not possibile, thank u very much for your interesting and disponbility and i'll try again and again and again to solve this.
Matteo

How to read data from Linux named pipes using java?

Similar Messages

Maybe you are looking for