Socket Connection. Pls advice
Good Evening All,
My scenario is some what like :
/people/saravanakumar.kuppusamy2/blog/2005/12/15/socket-integration-with-xi
Can I use java code for socket programming in UDF of Message Mapping instead of creating Java Mapping.
Regards
Hi,
In Sap Help about user-defined-functions it's only said:
> Make sure you read the implementation considerations in Java Mapping, which also apply to user-defined functions in message mappings.
So it should be no problem.
http://help.sap.com/saphelp_nw04/helpdata/en/22/e127f28b572243b4324879c6bf05a0/frameset.htm
You could write your code directly in a user-defined-function or you could also use imported classes in user-defined-functions.
Regards
Patrick
Similar Messages
-
Hi I lost my iphone 5,and each time I try to log in to icloud to locate it I get a message that error while connecting to server.Pls advice on what to do to locate ot.Thank you.
what browser? have you tried another browser could be your browser settings which cause it you can also try another computer
-
UDF in message mapping instead of Java Mapping. Pls advice urgent
Hi All,
My scenario
CRM --- XI -- CRM
In XI I have to open socket connection.
Pls refer link:
/people/saravanakumar.kuppusamy2/blog/2005/12/15/socket-integration-with-xi
Can Java Mapping code given in above link for socket connection can be used in Message Mapping (CRM -- CRM)UDF?
Pls advice urgent
RegardsHi Henry,
I understood your requirement.
But as per the architecture of XI/PI some message has to trigger your scenario.
In this case there is no adapter where you can directly communicate with CRM system.
Do one thing configure a dummy scenario on the sender side.
Use File adapter for simplicity. once it pools the file with some dummy data in the file it comes to Interface mapping(message mapping) of the PIPELINE steps. Now use the code as you mentioned above(within UDF) for opening socket to CRM system and implement you business logic within that program and write the response to target interface which will infact talk with CRM system.
Dont forget to do the coding in an infinite loop with some delay (if required). Other wise every time you have to put a message for File Adapter for triggering purposes.
You can also acheive the same if you use Java Mapping instead of Graphical mapping with UDF(code for Opening socket and business logic). I suggest you to use Java Mapping.
I dont know how you will comunicate with CRM system on receiver side.?
Thanks,
Gujjeti -
Http Scenario. Pls advice very urgent
Hi All,
My Scenario is
a. HTTP sends data to XI Synchronously.
b. XI opens Socket Connection in User Defined Function (UDF)
of Message Mapping and gets response back from Socket
in UDF. For Socket Connection request and response I will
write java code in UDF
c. XI needs to send back Socket response to HTTP as XI has
received data from HTTP Synchronously.
d. XI also needs to send back Socket response to File.
How to make this approach in XI using BPM.
Pls expain urgent
RegardsHi Praveen,
Steps in BPM I have done :
1. One Rec step with Open S/A mode.
Abstract Sync Message Interface for HTTP Request and
HTTP Response.
2. Transformation Step (Mapping in BPM)
HTTP Request and Socket Response
3. Fork Step -- Necessary Branch 2
4. Branch 1st --
a. Transformation Step(Mapping in BPM)
Socket Response and HTTP Response
b.One Send Step with Close S/A mode for HTTPResponse
back
5. Branch 2nd --
a. Transformation Step (Mapping in BPM)
Socket Response and File Response
b. One Send Step for File Response back.
Pls advice is it ok ?
Regards -
HTTP adapter. Pls advice urgent
Hi,
Some cleint wants to send data to PI (7.0) through HTTP.
Now should that client send through HTTP or it can also use
HTTPS.
Pls advice urgent.
RegardsHi,
All XI runtime components using the HTTP protocol support the encryption of the HTTP data stream by means of the SSL protocol, also known as HTTPS. HTTPS data streams are completely transparent to the Exchange Infrastructure
HTTPS (Hyper Text Transfer Protocol Secure) is a secure version of the Hyper Text Transfer Protocol (http). Secure means of transferring data using the https protocol in the World Wide Web where secure ecommerce transactions, such as online banking transactions and other financial transactions are involved.
Https encrypts the session with a digital certificate i.e., HTTP over SSL (Secure Sockets Layer) which can be used by Web browsers and HTTPS - capable client programs.
If the website begins with https:// instead of http://, it is a secure site. Almost 99% of the browsers can connect to web servers either using http or https. The address bar in the browser will begin with https instead of http, if a web site is secured.
HTTPS Protocol work with the combination of programs including the browser programs which takes care of the encryption/decryption routines that exist on the web hosting servers.
HTTP data is sent over TCP/IP port 80, whereas HTTPS data is sent over port 443.
HTTPS comes in two flavors, both ensuring the confidentiality of data sent over the network
1)Server authentication :
Only the HTTP server identifies itself with a certificate that is to be verified by the client.
2)Client authentication:
Additionally, the HTTP client identifies itself with a certificate that is to be verified by the server
Regards,
sangeetha -
Certificates for Server and Client to install . Pls advice
I am doing File --XI --- File scenario with FTPS.
Currently consider only File -- XI part now.
We go point by point: for this link:
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/964f67ec-0701-0010-bd88-f995abf4e1fc
Blog says:
1. In the visual admin of XI make Server Public and Private keys.
2. In the visual admin of XI make Client Public and Private keys.
Suppose File Sender System is Server and XI is Client
Questions:
a. Do I need make Server Public and Private keys In the visual admin of XI ?
b. Do I need make Client Public and Private keys In the visual admin of XI ?
Generic Rule -- system1 sends its public key to system2 and similarly system2 sends its public key to system1.
c. For Export keys and Import keys as given in blog
-- I am not able to get this part given from Page 38 - 41 of this blog.
Pls advice me
Regards
Edited by: Henry A on Mar 3, 2008 1:07 PM
Edited by: Henry A on Mar 3, 2008 1:08 PM
Edited by: Henry A on Mar 3, 2008 1:54 PMHi DecaXD,
thank you for quick response :)
on the client site i tried to establish the connection to the work repository with the following connection information:
Login information*:
Oracle Data Integrator Connection
Login name = odi_server
User = SUPERVISOR
Database connection (Master Repository):
User = odim
URL = jdbc:oracle:thin:@<server ip>:1521:orcl
A work repository could be found, but the connection failed! (?!)
" ODI-26130: Connection to the repository failed.
oracle.odi.core.config.NotWorkRepositorySchemaException: ODI-10147: Repository type mismatches.
Could not get JDBC Connection; nested exception is java.sql.SQLException: Unable to start the Universal Connection Pool: oracle.ucp.UniversalConnectionPoolException: Invalid SQL-Query for validating the connection (+translated from german into english+) "
my ODI configuration on the server site (loged in as: odiw):
topology tab*:
Physical architecture:
Technology:
Definition:
Dataserver name = oracle_db_11gr2
User = odiw
JDBC-URL = jdbc:oracle:thin:@10.168.178.131:1521:orcl
Datasource:
Agent = OracleDIAgent
JNDI-Name = [DataSourceName]
Agents:
Definition:
Name = OracleDIAgent
Host = <IP of the server>
Port = 8001
Webapplicationcontext = oraclediagent
Datasources:
Dataserver = oracle_db_11gr2
JNDI-Name = [DataSourceName]
Logical architecture:
Technology:
Defintion:
Name = oracle_db_11gr2
Context = aMIS_dev
Physical schema = oracle_db_11gr2.ODIW
Agent:
Name = OracleDIAgent
Context = aMIS_dev
Physical agent = OracleDIAgent
when i test the connection of the data server (topology>physical architecture>technology>oracle>oracle_db_11gr2) with the OracleDIAgent i receive the
" ODI-26039: Connection failed.
oracle.odi.runtime.agent.invocation.InvocationException: javax.naming.NameNotFoundException: Unable to resolve '[DataSourceName]'. Resolved ''; remaining name '[DataSourceName]' "
since testing the connection on the server site failed in first place, i couldn't test the connection on the client site. -
Multiple socket connection in TC65
Hello!
I connect TC65 with server by socket connection on port 23. I close this socket, output and input streams as well. Because I've read some information from server I want to connect to another device using socket connection on port 43 for example, but it seems it doesn't work. I guess in some way it could be done because I closed previous connection. Any advise?
Lukeok. dear
my another id is [email protected]
Right, I'm getting tired of this already.
NO, I'm not going to send you any code, you lazy nitwit. Neither will anybody here.
Your use of the imperative form in your question is rude. You may talk like that to your colleagues, but in a forum where people answer questions in their spare time and on a voluntary basis this is inacceptable.
You didn't even bother to say "please", at the least. Not that this would have changed much, but at least you wouldn't have been barking.
[url http://www.catb.org/~esr/faqs/smart-questions.html]This document might provide you some orientation.
As for your problem, first find out what exactly it is you want to do. Search the web, as kajbj counselled, it's quite a common task. If you have a specific problem, ask. But, take my advice and never, never ever ask people to "send you code" in a forum. -
Decompile applet and proxify all URL and socket connection and recompile
Hi,
Please anybody have idea for the below.
I need to decomple the applet class file to .java file and need to change all URL and Socket connection to proxify all connections from applet. and recompile the sample applet to make ready to load in browser.
Thi is to load the applet form the web server through one proxy server. In the proxy server side While loading the applet from web server that applet code need to be changed to modify the URL and connections used in that applet to change the further connection from applet through proxyserver.
Compile and decompile is not a problem that i can use javac and javap respectively.
But I want to know how to change all URL and connection in applet. is there any easy way to handle this with out changing the applet code.
can Anybody help me.
Thanks and Regards,
Shiban.Not sure how you do that:
Client <----[HTTPS]-----> Secure Gateway <------[HTTP]------->Web servers
or
Internet Explorer/Mozilla <----[HTTPS]-----> proxy <------[HTTP]-------> Google
Is the above correct?
If so than what are the proxy settings in IE/Moz, I can specify the proxy address in the
browsers but not the proxy type (SSL).
When you want to visit a page like google I gues you just type http://www.google.com in
the browsers address bar. The browser will figure out how to connect to the proxy.
Java has got the control panel in the general tabl there is a button "network settings...:"
I have it to "use browser settings" and this works for me.
All URL and URLConnections work but the sockets don't (maybe put in a bug report)
for example games.yahoo.com -> card games -> bridge -> create table
In the trace I can see:
network: Connecting http://yog70.games.scd.yahoo.com/yog/y/b/us-t1.ldict with proxy=HTTP @ myproxy/00.00.00.00:80
network: Connecting socket://yog70.games.scd.yahoo.com:11999 with proxy=DIRECT
The second one fails because port 11999 is not open (what idiot uses an unassigned
port for a profesional site is beyond me).
http://www.iana.org/assignments/port-numbers
# 11968-11999 Unassiged
Even if the port was open on the proxy you'll notice with proxy=DIRECT that
"use browser settings" does not work with socket (bug report??).
Anyway my advice is to open the java console (windows control panel or javacpl.exe in
the bin dir of java.home) and make sure it is set to "use browser settings"
Then enable a full trace:
To turn the full trace on (windows) you can start the java console, to be found here:
C:\Program Files\Java\j2re1.4...\bin\jpicpl32.exe
In the advanced tab you can fill in something for runtime parameters fill in this:
-Djavaplugin.trace=true -Djavaplugin.trace.option=basic|net|security|ext|liveconnect
if you cannot start the java console check here:
C:\Documents and Settings\userName\Application Data\Sun\Java\Deployment\deployment.properties
I think for linux this is somewhere in youruserdir/java (hidden directory)
add or change the following line:
javaplugin.jre.params=-Djavaplugin.trace\=true -Djavaplugin.trace.option\=basic|net|security|ext|liveconnect
for 1.5:
deployment.javapi.jre.1.5.0.args=-Djavaplugin.trace\=true -Djavaplugin.trace.option\=basic|net|security|ext|liveconnect
The trace is here:
C:\Documents and Settings\your user\Application Data\Sun\Java\Deployment\log\plugin...log
I think for linux this is somewhere in youruserdir/java (hidden directory)
Print out the full trace of the exception:
try{...}catch(Exception e){e.printStackTrace();}
Then visit the games.yahoo and try to create a new table playing bridge.
Inspect the trace and see if it works/why it doesn't work. -
Socket connect slow in JDK 1.5?
We recently began testing our Java Swing application with JDK 1.5, and we noticed that socket.connect()
calls are taking several seconds to return, when before in 1.4 the calls returned immediately.
Here is some sample code:
Socket sock = new Socket();
InetSocketAddress sockAddr = new InetSocketAddress(inAddress, portNum);
sock.connect(sockAddr, 2000);
What could be wrong? I've debugged the code and verified inAddress is an IP address,
not a hostname.
-EricHere is the list of enhancements in JDK1.5.
http://java.sun.com/j2se/1.5.0/docs/guide/net/enhancements-1.5.0.html
I wonder if any of them are having some effect in the slow connection.
There are some network properties that you can tweak with. Did you try them?
Here is the list
http://java.sun.com/j2se/1.5.0/docs/guide/net/properties.html -
Is there any way to identify the particular socket connection is closed ?
Is there any way to identify the particular socket connection is closed or not ?
Any methods ???
How can the program knows the connection is lost or some thing ...
Is the socket throws some excpetions when there is no active connection ???
namancIf you get an IOException when you try to use the socket, the connection was obviously closed.
The correct way for an application to know if the socket was closed is:
1) the server sends a message indicating that the socket should be closed
2) the client closes the socket itself -
I suppose it is the problem with socket connection,Please help
Hi,
I'm trying to build a chat server in Java on Linux OS.I've created basically 2 classes in the client program.The first one shows the login window.When we enter the Login ID & password & click on the ok button,the data is sent to the server for verification.If the login is true,the second class is invoked,which displays the messenger window.This class again access the server
for collecting the IDs of the online persons.But this statement which reads from the server causes an exception in the program.If we invoke the second class independently(ie not from 1st class) then there is no problem & the required data is read from the server.Can anyone please help me in getting this program right.I'm working on a p4 machine with JDK1.4.
The Exceptions caused are given below
java.net.SocketException: Connection reset by peer: Connection reset by peer
at java.net.SocketInputStream.SocketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:119)
at java.io.InputStreamReader$CharsetFiller.readBytes(InputStreanReader.java :339)
at java.io.InputStreamReader$CharsetFiller.fill(InputStreamReader.java:374)
at java.io.InputStreamReader.read(InputStreamReader.java:511)
at java.io.BufferedReader.fill(BufferedReader.java:139)
at java.io.BufferedReader.readLine(BufferedReader.java:299)
at java.io.BufferedReader.readLine(BufferedReader.java:362)
at Login.LoginData(Login.java:330)
at Login.test(Login.java:155)
at Login$Buttonhandler.actionPerformed(Login.java:138)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1722)
at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:17775)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:4141)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:253)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:261)
at java.awt.Component.processMouseEvent(Component.java:4906)
at java.awt.Component.processEvent(component.java:4732)
at java.awt.Container.processEvent(Container.java:1337)
at java.awt.component.dispatchEventImpl(Component.java:3476)
at java.awt.Container.dispatchEventImpl(Container.java:1399)
at java.awt.Component.dispatchEvent(Component.java:3343)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3302)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3014)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2967)
at java.awt.Container.dispatchEventImpl(Container.java:1373)
at java.awt.window.dispatchEventImpl(Window.java:1459)
at java.awt.Component.dispatchEvent(Component.java:3343)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:439)
at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:131)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
My program looks somewhat like this :
1st class definition:
public class Login extends Jframe// Login is the name of the first class;
Socket connection;
DataOutputStream outStream;
BufferedReader inStream;
Frame is set up here
public class Buttonhandler implements ActionListener
public void actionPerformed(ActionEvent e) {
String comm = e.getActionCommand();
if(comm.equals("ok")) {
check=LoginCheck(ID,paswd);
test();
public void test() //checks whether the login is true
if(check)
new Messenger(ID);// the second class is invoked
public boolean LoginCheck(String user,String passwd)
//Enter the Server's IP & port below
String destination="localhost";
int port=1234;
try
connection=new Socket(destination,port);
}catch (UnknownHostException ex){
error("Unknown host");
catch (IOException ex){
ex.printStackTrace ();
error("IO error creating socket ");
try{
inStream = new BufferedReader(new InputStreamReader(connection.getInputStream()));
outStream=new DataOutputStream(connection.getOutputStream());
}catch (IOException ex){
error("IO error getting streams");
ex.printStackTrace();
System.out.println("connected to "+destination+" at port "+port+".");
BufferedReader keyboardInput=new BufferedReader(new InputStreamReader(System.in));
String receive=new String();
try{
receive=inStream.readLine();
}catch(IOException ex){ error("Error reading from server");}
if(receive.equals("Logintrue"))
check=true;
else
check=false;
try{
inStream.close();
outStream.close();
connection.close();
}catch (IOException ex){
error("IO error closing socket");
return(check);
// second class is defined below
public class Messenger
Socket connect;
DataOutputStream outStr;
BufferedReader inStr;
public static void main(String args[])
{ Messenger mes = new Messenger(args[0]);}
Messenger(String strg)
CreateWindow();
setupEvents();
LoginData(strg);
fram.show();
void setupEvents()
fram.addWindowListener(new WindowHandler());
login.addActionListener(new MenuItemHandler());
quit.addActionListener(new MenuItemHandler());
button.addActionListener(new Buttonhandle());
public void LoginData(String name)
//Enter the Server's IP & port below
String dest="localhost";
int port=1234;
int r=0;
String str[]=new String[40];
try
connect=new Socket(dest,port);
}catch (UnknownHostException ex){
error("Unknown host");
catch (IOException ex){
ex.printStackTrace ();
error("IO error creating socket ");
try{
inStr = new BufferedReader(new InputStreamReader(connect.getInputStream()));
outStr=new DataOutputStream(connect.getOutputStream());
}catch (IOException ex){
error("IO error getting streams");
ex.printStackTrace();
String codeln=new String("\n");
try{
outStr.flush();
outStr.writeBytes("!@*&!@#$%^");//code for sending logged in users
outStr.writeBytes(codeln);
outStr.write(13);
outStr.flush();
String check="qkpltx";
String receive=new String();
try{
while((receive=inStr.readLine())!=null) //the statement that causes the exception
if(receive.equals(check))
break;
else
str[r]=receive;
r++;
}catch(IOException ex){ex.printStackTrace();error("Error reading from socket");}
catch(NullPointerException ex){ex.printStackTrace();}
} catch (IOException ex){ex.printStackTrace();
error("Error reading from keyboard or socket ");
try{
inStr.close();
outStr.close();
connect.close();
}catch (IOException ex){
error("IO error closing socket");
for(int l=0,k=1;l<r;l=l+2,k++)
if(!(str[l].equals(name)))
stud[k]=" "+str[l];
else
k--;
public class Buttonhandle implements ActionListener
public void actionPerformed(ActionEvent e) {
//chat with the selected user;
public class MenuItemHandler implements ActionListener
public void actionPerformed(ActionEvent e)
String cmd=e.getActionCommand();
if(cmd.equals("Disconnect"))
//Disconnect from the server
else if(cmd.equals("Change User"))
//Disconnect from the server & call the login window
else if(cmd.equals("View Connection Details"))
//show connection details;
public class WindowHandler extends WindowAdapter
public void windowClosing(WindowEvent e){
//Disconnect from server & then exit;
System.exit(0);}
I�ll be very thankful if anyone corrects the mistake for me.Please help.You're connecting to the server twice. After you've successfully logged in, pass the Socket to the Messenger class.
public class Messenger {
Socket connect;
public static void main(String args[]) {
Messenger mes = new Messenger(args[0]);
Messenger(Socket s, String strg) {
this.connect = s;
CreateWindow();
setupEvents();
LoginData(strg);
fram.show();
} -
Problem with socket connection
have my gps reciver connected to the usb port - i have a daemon gpsd running which makes data available on tcp port 2947 for querying. when i do telnet, it gives proper data.
but when i open a socket connection using java, it does not print anything as output. actually telnet asks for an escape charatcer so i am sending "r" initially to the server but still the program does not print anything as output.
here is my java code -
import java.io.*;
import java.net.Socket;
public class test2
public static void main(String[] args)
try
Socket s = new Socket("localhost",2947);
PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(
s.getOutputStream())),true);
out.println("r");
BufferedReader in = new BufferedReader(new InputStreamReader(s.getInputStream()));
String line;
while(true)
line = in.readLine();
System.out.println(line);
catch (Exception e)
or sometimes it even shows error as
Exception in thread "main" java.net.SocketException: Invalid argument or cannot assign requested address
at java.net.PlainSocketImpl.socketConnect(Native Method)
and this is the output which i get on telnet -
ot@localhost ~]# telnet localhost 2947
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
r
GPSD,R=1
$GPRMC,000212,V,18000.0000,N,00000.0000,W,0.0000,180.000,101102,,*1A
$GPGSA,A,1,,,,,,,,,,,,,,,,*32
$PGRME,400.00,0.00,0.00*7B
$GPRMC,000213,V,18000.0000,N,00000.0000,W,0.0000,180.000,101102,,*1B
$GPGSA,A,1,,,,,,,,,,,,,,,,*32
$PGRME,400.00,0.00,0.00*7B
$GPRMC,000214,V,18000.0000,N,00000.0000,W,0.0000,180.000,101102,,*1C
$GPGSA,A,1,,,,,,,,,,,,,,,,*32Actually the problem does not seem to be in the code because i tried some basic client server programs (without any gpsd etc in picture) and even they are not working in linux though they work perfectly in windows (on the same machine). In linux it shows exception
My socket programs dont work in linux it shows error -
ot@localhost winc]# java parser
Exception in thread "main" java.net.SocketException: Invalid argument or cannot assign requested address
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:171)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158)
at java.net.Socket.connect(Socket.java:452)
at java.net.Socket.connect(Socket.java:402)
at java.net.Socket.<init>(Socket.java:309)
at java.net.Socket.<init>(Socket.java:124)
at parser.main(parser.java:10)
i have removed the firewall settings etc and it still doesnot work in linux
what could be the cause for this?
Sowmya -
Problem with socket connection through Java Embedding...
We are trying to create a simple socket connection to a socket server through BPEL PM using the Java Embedding component.
BPEL Process : Client makes an asynchronous request. Passes an input variable. The input variable is sent to the Server Program through a socket connection through the Java embedding component.
Server: We are running a simple Socket Server program from command prompt.
The code below works fine as long as we do not try to receive a response from the server (Commented Code).
If we uncomment the code and try to receive a response, it refuses to create an instance for the BPEL Process. And sometimes restarts the BPEL Server.
Client Code:
String msg="NONE";
try{
org.w3c.dom.Element input = (org.w3c.dom.Element) getVariableData("inputVariable","payload","/client:clientProcessRequest/client:input");
msg = input.getNodeValue();
Socket clientsoc=new Socket("ServerIP",1000);
PrintWriter out1=new PrintWriter(clientsoc.getOutputStream());
out1.write(msg);
out1.flush();
BufferedReader cin1=new BufferedReader(new InputStreamReader(clientsoc.getInputStream()));
msg=cin1.readLine();
setVariableData("outputVariable","payload","/client:result",new String(msg));
clientsoc.close();
catch(UnknownHostException e)
System.err.println("Don't know about host: dev.");
System.exit(1);
catch (IOException e)
System.err.println("Couldn't get I/O for "+ "the connection to: dev.");
System.exit(1);
}Repost
-
Problem with socket connection in midp 2.0
hello everyone.
I'm new one in j2me and I am learning socket connection in j2me. I'm using basic socket,datagram example wich is come with sun java wireless toolkit 2.5. for it i wrote small socket server program on c# and tested it example on my pc and its working fine. also socket server from another computer via internet working fine. But when i instal this socket example into my phone on nokia n78 (Also on nokia 5800) it's not working didn't connect to socket server.. On phone I'm using wi-fi internet. Can anybody help me with this problem? I hear it's need to modify manifest file and set appreciate pressions like this
MIDlet-Permissions: javax.microedition.io.Connector.socket,javax.microedition.io.Connector.file.write,javax.microedition.io.Connector.ssl,javax.microedition.io.Connector.file.read,javax.microedition.io.Connector.http,javax.microedition.io.Connector.https
is it true?
can anybody suggest me how can i solve this problem?
where can I read full information about socket connection specifiecs in j2me?
Thanks.Maybe this can be helpful:
[http://download-llnw.oracle.com/javame/config/cldc/ref-impl/midp2.0/jsr118/index.html]
you can check there the Datagram interface anda DatagramConnection interface and learn a little about that.
If the client example runs fine in the wireless toolkit emulator, it should run the same way in your phone; i suggest to try to catch some exception that maybe is hapenning and display it on a Alert screen, this in the phone. -
How to make a socket connection timeout infinity in Servlet doPost method.
I want to redirect my System.out to a file on a remote server (running Apache Web Server and Apache Tomcat). For which I have created a file upload servlet.
The connection is established only once with the servlet and the System.out is redirected to it. Everything goes fine if i keep sending data every 10 second.
But it is required that the data can be sent to the servlet even after 1 or 2 days. The connection should remain open. I am getting java.net.SocketTimeoutException: Read timed out Exception as the socket timeout occurs.
Can anyone guide me how to change the default timeout of the socket connection in my servlet class.
Following is the coding to establish a connection with the Servlet.
URL servletURL = new URL(mURL.getProtocol(), mURL.getHost(), port, getFileUploadServletName() );
URLConnection mCon = servletURL.openConnection();
mCon.setDoInput(true);
mCon.setDoOutput(true);
mCon.setUseCaches(false);
mCon.setRequestProperty("Content-Type", "multipart/form-data");
In the Servlet Code I am just trying to read the input from the in that is the input stream.
public void doPost(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException
BufferedInputStream in = new BufferedInputStream(req.getInputStream());
byte [] content = new byte[1024];
do
read = in.read(content, 0, content.length);
if (read > 0)
out.write(content, 0, read);
I have redirected the System.out to the required position.
System.setOut(........);
Can anyone guide me how to change the default timeout of the socket connection in my servlet class.I am aware of the setKeepAlive() method, but this can only used with the sockets. Here i am inside a servlet, have access to HTTPServletRequest and HTTPServletResponse and I don't know how to get access to the underlying sockets as the socket handling will be handled by the tomcat itself. If I am right there will be method in the apache tomcat 6.0.x to set this property. But till now I am not getting it.
-
Multiple clients on socket connection
Hi!
I understand that it is possible that multiple clients listen to one server (on the same port) and even write to it (then it should be a multi-threaded server).
But i would like to refuse connectios, if one client is connected. How can I do that?
In my case I have a (single threaded) server. Now one clients connects. The server waits to receive data from the client and answers, without ever closing the port. that works.
Now if I connect with a second client, the openicng of the socket in the second client works fine, although the server does not seem to notice the second client. Communication is not possible between the server and the second client, and the server doesn't answer to the first client anymore, although he receives data from it.
So, since the server does not seem to notice the second client (does not accept the connection) and I don't get an exception at the second client, what can I do?
Thank you for your help!
concerned Code (if you want to take a look at it):
CLIENT:
socket = new Socket(hostname, echo_port);
SERVER:
try
ServerSocket waitingsocket = new ServerSocket(echo_port);
try
socket= waitingsocket.accept();
System.out.println("Client connected");
ReaderThread reader = new ReaderThread( this, socket );
reader.start();
catch (Exception e)
READER:
public void run()
while (true)
try {
int bytesRead = inStream.read(inputBuffer,
0, inputBuffer.length);
readCallback.tcpUpdate(inputBuffer,bytesRead);
catch (Exception oops)
readCallback.tcpUpdate(null,-1);
Just to make sure this is clear: You can NOT have multiple clients on a given socket connection. You CAN have multiple clients connected to a particular port on a given server, but each client will be communicating with the server through a different of socket.
The usual approach here is to set up a listening ServerSocket on the desired port, call accept() on it, then process the communication from the returned Socket object. This is usually done by spawning a new thread and allowing it to handle the socket communication, while the ServerSocket loops around to another accept() for the next communication.
Here's an excellent intro to the concepts (the code is really ugly and poorly implemented, but it does a good job of explaining the overall concept). I used this as a starting point, and now (after a whole lot of development) have a pretty sweet extensible web server class that handles template expansion, etc... (I use this as a quick and dirty UI for some of my apps, instead of requiring the user to install a JSP container):
http://developer.java.sun.com/developer/technicalArticles/Networking/Webserver/
- K
Maybe you are looking for
-
What's the use of Skype if it can't receive calls?
The community of Skype users have been struggling with this issue and its variations for years now: "iPad doesn't ring"; "iPad won't ring"; "Skype on iPad does not ring"; "Skype calls not ringing on iPad"... I am an iPad Skype user, and one of the re
-
Interest computation on Special GL Transactions
Dear Gurus, We are on SAP 4.7 system and our requirement is to compute Interest to be paid to our Customers who have paid us Deposits. That is, the Deposits paid by Customers to us and booked using Special GL Transactions that lead to customer credi
-
Does a volume license for Adobe Acrobat 9 Standard entitle me to make an upgrade to Adobe Acrobat VI Standard?
-
I am capturing GPS data on my photos. On the camera I can see longitude, latitude, altitude and universal time. When viewing the data in Lightroom 2.5, on a Mac i can see the space coordinates, but not the time. Is there a way to display this? If
-
My music library is synced by wont play
My music library shows up on my Iphone, which I am using as an ipod touch, but is in light gray not black and doesnt play. When I try to sync, it says, Iphone not found so can not sync