One application with Multiple schemas- common application frame work
Hi All,
I am trying setup a common application frame work in apex. Please help me.
How to achieve this.
Creation of one application attached to different schemas at run time. So that my application maintaince is going to be easy instated of creating copies of same application.
More details:
1. I have one application with 100 pages pointing to a schema dev_common in one workspace APP_COMMON. I have 50 schemas with same structure of dev_common schema with different set of data ( because of large amount of data).
So I want to create one application attached to different schemas.
2. And another thing is I have 100 users, the user can work on 1 or multiple schemas ( I mean same application with different schemas attached)
Any help much appreciated.
Thanks,
Thank you for the reply.
>> b) I think you have to give access rights for the dev_common and app_common to all users.
Dev_common schema is a kind of placeholder. I have 50 schemas same as dev_common because of different business requirements but the front end is same for all 50 schemas. How can we create one application used for 50 schemas instead of creating 50 applications and 50 workspaces.
Please help me.
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[ code ]
Exception in thread "main" java.lang.NullPointerException
at PostOfficeImpl.isinputAvail(PostOfficeImpl.Java:315)
at PostOfficeImpl_Skel.dispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:375)
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// Instance of ourselves
public static String name;
private static PostOfficeServer rmi;
// public No-argument constructor
public PostOfficeServer() throws RemoteException {
super();
public static void main(String[] args){
if(System.getSecurityManager() == null) {
System.setSecurityManager(new RMISecurityManager());
try {
new PostOfficeServer();
PostOffice postOfficeserver = new PostOfficeImpl();
try {
getIP ipAdd1 = new getIP();
String ip1 = ipAdd1.getIP();
name = "//" + ip1 + "/PostOffice";
catch (Exception e){
System.out.println();
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System.out.println("RemoteServer bound");
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postOfficeserver.initDatastructure();
System.out.println("initilised");
catch (java.rmi.RemoteException e) {
System.out.println("Cannot create remote server object");
catch (java.net.MalformedURLException e) {
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System.out.println("Server started.");
System.out.println("Enter <CR> to end.");
try {
int serve2end = System.in.read();
}catch (IOException ioException) {
System.exit(0);
//endoffilePlease advise as this is very urgentHi
the following is the code for PostOfficeImpl...its a long code but i include it so that I get your help please...
import java.io.*;
import java.net.*;
import java.lang.*;
import java.rmi.*;
import java.rmi.server.*;
import java.rmi.RemoteException;
import java.util.HashMap;
import java.util.*;
public class PostOfficeImpl extends java.rmi.server.UnicastRemoteObject implements PostOffice {
//Implementations must have an explicit constructor in order to declare the
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public PostOfficeImpl() throws java.rmi.RemoteException {
super();
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public static oListImpl ovarList = new oListImpl();
public static iListImpl ivarList =new iListImpl();
public static lipsList llfirst;
public static oList opchannel, ofirst, onext;
public static iList ipchannel, ichan, ifirst;
public static String[] variNumber= new String[100];
public static String[] inoutChan, inChan, outChan,inVAR, invarLIST,outVAR, outvarLIST ;
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DriverMatrix_mthds drive = new DriverMatrix_mthds();
private static Boolean All_Vacant;
private static Boolean tAll_Vacant;
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tAll_Vacant = All_Vacant;
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ifirst = null;
ofirst=null;
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drive.nodeInput();
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drive.noOfVariables();
drive.Assignlist();
drive.novarType();
drive.varNameType();
drive.nodeNumName();
drive.driverMat();
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int varlistlength = (int) leng1;
int counter;
String s1="";
String s2="";
String s3 = "";
String s4 = "";
String s6 = "";
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String varname, varnumber;
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i=i+1;
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i=i+1;
i = i + 1;
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i1=0;
j1=1;
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s5 = 0;
s6 = null;
ofirst= new oList(s3,s4, s5, s6);
ovarList.add(ofirst);
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i=i+1;
llfirst = new lipsList(s1, s2, ivarList, ovarList);
list.add(llfirst);
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i=i+1;
catch (NullPointerException ne){
catch (Exception d){}
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throws RemoteException{
String nodnum = sndNodetail.srcNum;
String varnum = sndNodetail.varNum;
int status = 0;
llfirst = list.getFirst();
try{mainbegin:while (llfirst != null){
if((llfirst.nodeNum).equals(nodnum)){
ofirst = ovarList.getFirst();
while(ofirst != null){
if((ofirst.varNum).equals(varnum)){
if(ofirst.varVal==null){
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ofirst = ofirst.next;
llfirst = llfirst.next;
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dataPacket datDetail = sendToRTS;
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String dtype = "";
nnum = datDetail.nodeNum;
vnum = datDetail.varNum;
typename = datDetail.dataType;
dval = String.valueOf(datDetail.dataVal);
String [][] tempdrive, varnametype;
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drive.noOfVariables();
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for(i=0; i<=lookupvar.length-1; i++){
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if(lookupvar[i][j] != null){
if(lookupvar[i][j].equals(typename)){
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whileloop:while (llfirst != null){
if((llfirst.nodeNum).equals(srcnum)){
ifirst = llfirst.ilist.getFirst();
breakloop: while(ifirst != null){
//System.out.println("var num " + varnum + " " + "status outside" + ifirst.varStat);
if((ifirst.varNum).equals(varnum)){
if (ifirst.varStat == 1){
availstatus = 1;
ifirst.varStat = 0;
// System.out.println("var num " + varnum + " " + "status" + availstatus);
break whileloop;
ifirst = ifirst.next;
llfirst = llfirst.next;
//System.out.println("var num " + varnum + " " + "status" + availstatus);
return availstatus;
public dataPacket senDatatoNode(reqPacket sendFromRTS)
throws RemoteException {
String nnum, vnum, dtype, dval;
//nnum = "";
dtype="";
//opchannel = llfirst.olist;
// ipchannel = llfirst.ilist;
reqPacket sendfromrts = sendFromRTS;
nnum = sendfromrts.srcNum;
vnum = sendfromrts.varNum;
// dtype = sendFromRTS.dataType;
dval = "";
int ctrchk=0;
try{
//send data to process node n reduce the counter by 1
llfirst = list.getFirst();
mainWhile: while (llfirst != null){
if((llfirst.nodeNum).equals(nnum)){
ofirst = llfirst.olist.getFirst();
whileofirst: while(ofirst != null){
if((ofirst.varNum).equals(vnum)){
dval = ofirst.varVal;
ofirst.counter = ofirst.counter - 1;
// System.out.println(ofirst.counter);
ctrchk=ofirst.counter;
break whileofirst;
ofirst = ofirst.next;
//set the status of respective input channel to 0 as data has been sent
ifirst = llfirst.ilist.getFirst();
if(ctrchk == 0){
whileifirst: while(ifirst != null){
if((ifirst.varNum).equals(vnum)){
//ifirst.varVal = dval;
ifirst.varStat =0;
break whileifirst;
llfirst = llfirst.next;
//System.out.println(llfirst);
catch(NullPointerException s){}
//find type
try{
DriverMatrix_mthds driver = new DriverMatrix_mthds();
driver.VarTypeArray();
driver.Variablelist();
driver.NodeOrigin();
driver.nodeInput();
driver.numOfnodes();
driver.noOfVariables();
driver.novarType() ;
String[][] lookupvar = driver.varNameType();
int i, j;
String varNum = vnum;
for(i=0; i<=lookupvar.length-1; i++){
j=0;
if(lookupvar[i][j] != null){
if(lookupvar[i][j].equals(vnum)){
dtype = lookupvar[i][2];
catch (Exception d){}
dataPacket retpac = new dataPacket(nnum, vnum, dtype, dval);
System.out.println("msg sent "+ nnum +" " + vnum+" "+ dtype+" "+ dval);
return retpac;
public String findnodeName(String nodeNum)
throws RemoteException{
String nnum = nodeNum;
llfirst = list.getFirst();
while (llfirst != null){
if((llfirst.nodeNum).equals(nnum)){
return llfirst.nodeName;
llfirst = llfirst.next;
System.out.println("node Number does not match with the list of node numbers generated..try again");
return null;
//find the nodenum given the node name
public String findnodenum(String nodename)
throws RemoteException{
String nodenumber ="";
String nodname = nodename;
try{DriverMatrix_mthds driver = new DriverMatrix_mthds();
driver.VarTypeArray();
driver.Variablelist();
driver.NodeOrigin();
driver.nodeInput();
driver.numOfnodes();
driver.noOfVariables();
driver.novarType() ;
driver.varNameType();
String[][] lookupnode = driver.nodeNumName();
int i, j;
for(i=0; i<=lookupnode.length-1; i++){
for(j=0; j<=2; j++){
if(lookupnode[i][j] != null){
if(lookupnode[i][j].equals(nodname)){
nodenumber = lookupnode[i][2];
catch (Exception d){}
return nodenumber;
public String findvarnum(String variablename)
throws RemoteException{
String varnumber = "";
try{
DriverMatrix_mthds driver = new DriverMatrix_mthds();
driver.VarTypeArray();
driver.Variablelist();
driver.NodeOrigin();
driver.nodeInput();
driver.numOfnodes();
driver.noOfVariables();
driver.novarType() ;
String[][] lookupvar = driver.varNameType();
int i, j;
String varname = variablename;
for(i=0; i<=lookupvar.length-1; i++){
for(j=0; j<=2; j++){
if(lookupvar[i][j] != null){
if(lookupvar[i][j].equals(varname)){
varnumber = lookupvar[i][0];
catch (Exception d){}
return varnumber;
public String findvartype(String varname)
throws RemoteException{
String vartype = "";
try{
DriverMatrix_mthds driver = new DriverMatrix_mthds();
driver.VarTypeArray();
driver.Variablelist();
driver.NodeOrigin();
driver.nodeInput();
driver.numOfnodes();
driver.noOfVariables();
driver.novarType();
String[][] lookupvar = driver.varNameType();
int i, j;
String varName = varname;
for(i=0; i<=lookupvar.length-1; i++){
for(j=0; j<=2; j++){
if(lookupvar[i][j] != null){
if(lookupvar[i][j].equals(varName)){
vartype = lookupvar[i][2];
catch (Exception d){}
return vartype;
public String findtypenum(String vartype){
String varnum = "";int i;
try{
DriverMatrix_mthds driver = new DriverMatrix_mthds();
driver.VarTypeArray();
driver.Variablelist();
driver.NodeOrigin();
driver.nodeInput();
driver.numOfnodes();
driver.noOfVariables();
String varNum[][] = driver.novarType() ;
String varType = vartype;
for(i=0; i<=9-1; i++){
if(varNum[i][0] != null){
if(varNum[i][0].equals(varType)){
varnum = varNum[i][1];
catch (Exception d){}
return vartype;
//return input variable list
public String[] inoutchanlist(String nodenum, String nodenam)
throws RemoteException{
try{
DriverMatrix_mthds drive = new DriverMatrix_mthds();
String[] varLIST = drive.Variablelist();
int i=0;int j;
while(varLIST[i]!=null){
i=i+1;
int arrlength = i;
inoutChan = new String[arrlength];
i=0; j=0;
WHILELOOP:
while(!(varLIST[i].equals("end of file"))){
while(varLIST[i].equals(nodenum)){
i=i+1;
while(varLIST[i].equals(nodenam)){
i=i+1;
while(!(varLIST[i].equals("end of input variable"))){
inoutChan[j] = varLIST[i];
i=i+1;
j=j+1;
System.out.println("endofinput");
inoutChan[j]="endofinchan";
j=j+1;
i=i+1;
while(!(varLIST[i].equals("end of output variable"))){
inoutChan[j] = varLIST[i];
i=i+1;
j=j+1;
System.out.println("endofoutput");
inoutChan[j]="endofoutchan";
break WHILELOOP;
i=i+1;
arrlength =j;
for(j=0; j<=arrlength-1; j++){
System.out.println(inoutChan[j]);
catch (Exception e){}
return inoutChan;
public String[] inchannel(String[] inoutChan) throws RemoteException{
int count=0;int i=0, j=0;
System.out.println("entered");
while(inoutChan[count]!=null){
System.out.println(count + " " +inoutChan[count]);
count=count+1;
inChan = new String[count];
while(!(inoutChan[i].equals("endofinchan"))){
inChan[j] =inoutChan[i];
j=j+1; i=i+1;
return inChan;
public String[] outchannel(String[] inoutChan) throws RemoteException{
int count=0;int i=0, j=0;
System.out.println("entered");
while(inoutChan[count]!=null){
System.out.println(count + " " +inoutChan[count]);
count=count+1;
outChan = new String[count+1];
while(!(inoutChan[i].equals("endofinchan"))){
i=i+1;
i=i+1;
while(!(inoutChan[i].equals("endofoutchan"))){
outChan[j] =inoutChan[i];
j=j+1; i=i+1;
return outChan;
public String[] invarChan(String nodename, int guardno)throws RemoteException{
try{
DriverMatrix_mthds drive = new DriverMatrix_mthds();
invarLIST = drive.invarlist();
int i=0;int j;
while(invarLIST[i]!=null){
i=i+1;
int arrlength = i;
inVAR = new String[arrlength];
i=0; j=0;
WHILELOOP: while(!(invarLIST[i].equals("end of file"))){
if (invarLIST[i].equals(nodename)){
i=i+1;
while(!(invarLIST[i].equals(nodename+String.valueOf(guardno)))){
i=i+1;}
i=i+1;
while(!(invarLIST[i].equals("endofguard"))){
System.out.println(invarLIST[i]);inVAR[j]=invarLIST[i]; i=i+1; j=j+1;}
break WHILELOOP;}
i=i+1;}
}catch (Exception d){}
return inVAR;
public String[] outvarChan(String nodename, int guardcount)throws RemoteException{
try{
DriverMatrix_mthds drive = new DriverMatrix_mthds();
outvarLIST = drive.outvarlist();
int i=0;int j;
while(outvarLIST[i]!=null){
i=i+1;
int arrlength = i;
outVAR = new String[arrlength];
i=0; j=0;
WHILELOOP: while(!(outvarLIST[i].equals("end of file"))){
if (outvarLIST[i].equals(nodename)){
i=i+1;
while(!(outvarLIST[i].equals(nodename+String.valueOf(guardcount)+"guard"))){
i=i+1;}
i=i+1;
while(!(outvarLIST[i].equals("end guard"))){
System.out.println(outvarLIST[i]);outVAR[j]=outvarLIST[i]; i=i+1; j=j+1;}
break WHILELOOP;}
i=i+1;}
}catch (Exception d){}
return outVAR;
private static Boolean start;
private static Boolean tstart;
public void sendstart(Boolean start) throws RemoteException {
tstart = start;
public Boolean getstart() throws RemoteException{
return tstart;
private static Boolean done;
private static Boolean tdone;
public void senddone(Boolean done) throws RemoteException {
tdone = done;
public Boolean getdone() throws RemoteException{
return tdone;
private static Boolean vac_busy1;
private static Boolean tvac_busy1;
public void sendvac_busy1(Boolean vac_busy1) throws RemoteException {
tvac_busy1 = vac_busy1;
public Boolean getvac_busy1() throws RemoteException{
return tvac_busy1;
private static int cus1_rit1;
private static int tcus1_rit1;
public void sendcus1_rit1(int cus1_rit1) throws RemoteException {
tcus1_rit1 = cus1_rit1;
public int getcus1_rit1() throws RemoteException{
return tcus1_rit1;
private static int cus1_rit2;
private static int tcus1_rit2;
public void sendcus1_rit2(int cus1_rit2) throws RemoteException {
tcus1_rit2 = cus1_rit2;
public int getcus1_rit2() throws RemoteException{
return tcus1_rit2;
private static int cus1_rit3;
private static int tcus1_rit3;
public void sendcus1_rit3(int cus1_rit3) throws RemoteException {
tcus1_rit3 = cus1_rit3;
public int getcus1_rit3() throws RemoteException{
return tcus1_rit3;
private static int cus1_it1;
private static int tcus1_it1;
public void sendcus1_it1(int cus1_it1) throws RemoteException {
tcus1_it1 = cus1_it1;
public int getcus1_it1() throws RemoteException{
return tcus1_it1;
private static int cus1_it2;
private static int tcus1_it2;
public void sendcus1_it2(int cus1_it2) throws RemoteException {
tcus1_it2 = cus1_it2;
public int getcus1_it2() throws RemoteException{
return tcus1_it2;
private static int cus1_it3;
private static int tcus1_it3;
public void sendcus1_it3(int cus1_it3) throws RemoteException {
tcus1_it3 = cus1_it3;
public int getcus1_it3() throws RemoteException{
return tcus1_it3;
private static int stkit_11;
private static int tstkit_11;
public void sendstkit_11(int stkit_11) throws RemoteException {
tstkit_11 = stkit_11;
public int getstkit_11() throws RemoteException{
return tstkit_11;
private static int stkit_12;
private static int tstkit_12;
public void sendstkit_12(int stkit_12) throws RemoteException {
tstkit_12 = stkit_12;
public int getstkit_12() throws RemoteException{
return tstkit_12;
private static int stkit_13;
private static int tstkit_13;
public void sendstkit_13(int stkit_13) throws RemoteException {
tstkit_13 = stkit_13;
public int getstkit_13() throws RemoteException{
return tstkit_13;
private static int c1_it1;
private static int tc1_it1;
public void sendc1_it1(int c1_it1) throws RemoteException {
tc1_it1 = c1_it1;
public int getc1_it1() throws RemoteException{
return tc1_it1;
private static int c1_it2;
private static int tc1_it2;
public void sendc1_it2(int c1_it2) throws RemoteException {
tc1_it2 = c1_it2;
public int getc1_it2() throws RemoteException{
return tc1_it2;
private static int c1_it3;
private static int tc1_it3;
public void sendc1_it3(int c1_it3) throws RemoteException {
tc1_it3 = c1_it3;
public int getc1_it3() throws RemoteException{
return tc1_it3;
//endoffile -
How to control one server with multiple clients via TCP/IP
I am wanting to control a single server with multiple clients. Only one client would be active at a time, so there would be no conflict. I want to use TCP/IP. So far, I have programmed a cluster that passes data back to the server with no problems. The challenge come in when a second client is added to the mix. I have't been able to figure out how to turn each client on and send the appropriate data and then turn it off so it doesn't keep sending the same data to the server.
Here are the things that I have considered and did some preliminary testing, but don't really know how to impliment:
1. Send a numeric on the front of the cluster packet that tells the server that data is on the way.
2. Send a boolean on the front of the cluster packet to somehow turn the server TCP/IP on.
The problem I have found is that LabVIEW TCP/IP doesn't like to be turned on and off. If it doesn't get the data it expects, it goes into a reset mode and that kills the response time.
Any help?You should consider implementing a set of simple one-byte commands that can be sent back and forth between the Server and the Clients. You can base all of these ideas off the example in the Example Finder under Networking >> TCP and UDP called Multiple Connections - Server.
You will have two loops in the server VI: one to wait for new connections, and one to send and receive data from the existing connections. For instance, after one of the clients connects, it can request control of the server to send data to it by sending the character "R" for request. Every time the send/receive loop of the Server executes, the first thing it can do is to check all the existing connections to see if any of the clients have sent a control request ("R"). If so, it will create a buffer (array) of control requests. This could be in the form of Connection IDs or indexes in the array for a particular Connection ID. Your choice.
After the Server receives a request for contol, if it is not already under control by another client, then it can send a response to the first client on the control request list. For instance, the server could send the first client a "S" command for send. Note that after the clients send their control request, they should execute a TCP Read and wait indefinitely for the server to respond with the one-byte "S" command. Then, once the client in control is finished sending data to the server, it could send the character "X" telling the Server to release it from control.
The example I mentioned above already does a similar thing. Note how when a client wants to disconnect, they send the letter "Q". You can see this in the Multiple Connections - Client VI. The Server then checks each individual connection to see if it's received this one-byte command, and if it has, it closes the connection to the client. This is what you would want to implement, but instead of having just one command, you'll have to distinguish between a few and build up a buffer of control requests.
Finally, if a client does decide to disconnect in your application, they could send the command "Q" just like the example above. At this point, close the connection and remove that Connection ID from the array of connections. You will also have to handle the case that this client was in the request control waiting line when it disconnected, in which case you need to delete it from that array as well.
This will definitely work for you, but it will take some work. Best of luck!
Jarrod S.
National Instruments -
When I clik on weblinks they all open into new windows making it somewhat painful to clik on window in the menu bar to go to each new page. I would rather have a feature that would allow me to merge all of those individual windows into tabs within one page.
== This happened ==
Every time Firefox openedThank you. That worked. I was able to open 1 window with multiple tabs. Thanks cor-el!
-
Apex Application With Oralce SSO (inbuilt) application integration
Hi,
Installed oracle 11g, configured Application Express Release 3.0.
I developed application in APEX.
Now I want to authenticate my application with Oracle SSO login.
Please help me on this.
Thanks in advance.
Thanks,
SuryaHello Surya,
If you follow the instructions here you should be able to connect to your SSO.
http://www.oracle.com/technology/products/database/application_express/howtos/sso_partner_app.html
Peter
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