Introduction: How to Consume a Simple Java Web Service From a C++(Legacy) & Java Application

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You need to install the following softwares(Search Google):
Apache Tomcat(on WIndows7 in my case)
Apache Axis(on WIndows7 in my case)
GSoap(on Redhat running on Virtual Box in my case)

Video:

First , write a functionality which you want to be consumed by a JAVA/C++ application as a Web Service & save it as *.jws in your axis installation director(\Tomcat 7.0\webapps\axis). After this run the http:///axis/EncryptDecrypt.jws?wsdl in your browser to test the wsdl.

EncryptDecrypt.jws
public class EncryptDecrypt {

public String encDec(String _inpDat){

String _outDat=new String();
int j=1;
if(_inpDat.charAt(0)!='#')
{
_outDat+="#";
j=0;
}
for(int i=j;i<_inpDat.length();i++)
{
_outDat+=_inpDat.charAt(0)=='#'?(char)((int)_inpDat.charAt(i)-1):(char)((int)_inpDat.charAt(i)+1);
}
return _outDat;
}}


Secondly, we design the client application in JAVA/C++

JavaWebClient.java
import org.apache.axis.client.Call;

public class JavaWebClient {

public String main(String args) throws Exception {
    String url="http:///axis/EncryptDecrypt.jws";
    Call data= new Call(url);
    String val= (String)data.invoke("","encDec",new Object [] {args});  //encDec is the function name from  EncryptDecrypt.jws
return val;
}
}

For C++ client you need to perform the following steps on the console:

wsdl2h -o EncryptDecrypt.h http://:8080/axis/EncryptDecrypt.jws?wsdl( this will generate a header file from wsdl file)

soapcpp2 -i -C -I/import EncryptDecrypt.h (this will generate the cpp files needed to call the webservice)


Step 1: Create & Execute C++ App

Now, we will create Xmotif application.

Cclient.c

#include
#include
#include "soapEncryptDecryptSoapBindingProxy.h" // obtain the generated stub
#include "EncryptDecryptSoapBinding.nsmap"
#include
#include
void callWeb();

Widget text,text1;

main (int argc, char *argv[])

{

XtAppContext   app;

Widget         toplevel, button;

void           my_callback(Widget, XtPointer, XtPointer);

XmString       btn_text;

Arg            args[2];

XtSetLanguageProc (NULL, NULL, NULL);

toplevel = XtVaOpenApplication (&app, "Web Client", NULL, 0, &argc, argv, NULL,

sessionShellWidgetClass, NULL);

Widget form=XtVaCreateManagedWidget("",xmFormWidgetClass,

toplevel,XmNrightAttachment,XmATTACH_FORM,XmNy,10,XmNwidth,447,XmNheight,587,XmNbackground,0xa1b6d6,NULL);



Widget firstLabel=XtVaCreateManagedWidget("",xmLabelWidgetClass,form,

XmNlabelString,XmStringCreateLocalized("Encrypt/Decrypt Web Service Client by Saurabh Saxena"),XmNbackground,0xc1ffff,XmNtopAttachment

,XmATTACH_FORM,XmNleftAttachment,XmATTACH_FORM,XmNrightAttachment,XmATTACH_FORM,NULL);



Widget Label=XtVaCreateManagedWidget("",xmLabelWidgetClass,form,XmNlabelString,XmStringCreateLocalized("Enter Text"),XmNbackground,0xc1ffcc,

XmNtopAttachment,XmATTACH_WIDGET,XmNtopWidget,firstLabel,XmNleftAttachment,XmATTACH_FORM,XmNwidth,75,XmNheight,29,NULL);



text=XtVaCreateManagedWidget("",xmTextWidgetClass,form,XmNleftAttachment,XmATTACH_WIDGET,XmNleftWidget,Label,XmNtopAttachment,

XmATTACH_WIDGET,XmNtopWidget,firstLabel,XmNwidth,75,XmNheight,29,XmNbackground,0xffffff,XmNeditable,TRUE,XmNcursorPositionVisible,

FALSE,XmNhighlightThickness,0,XmNshadowThickness,1,NULL);



button = XtVaCreateManagedWidget("",xmPushButtonWidgetClass,form,XmNtopAttachment,XmATTACH_WIDGET,XmNtopWidget,firstLabel,

XmNleftAttachment,XmATTACH_WIDGET,XmNleftWidget,text,XmNlabelString,XmStringCreateSimple("Click"),XmNheight,20,XmNwidth,40,NULL);



Widget Label2=XtVaCreateManagedWidget("",xmLabelWidgetClass,form,XmNlabelString,XmStringCreateLocalized("Output Text"),XmNbackground,

0xc1ffcc,XmNtopAttachment,XmATTACH_WIDGET,XmNtopWidget,Label,XmNleftAttachment,XmATTACH_FORM,XmNwidth,75,XmNheight,29,NULL);

text1=XtVaCreateManagedWidget("",xmTextWidgetClass,form,XmNleftAttachment,XmATTACH_WIDGET,XmNleftWidget,Label2,XmNtopAttachment,

XmATTACH_WIDGET,XmNtopWidget,text,XmNwidth,75,XmNheight,29,XmNbackground,0xffffff,XmNeditable,FALSE,XmNcursorPositionVisible,

FALSE,XmNhighlightThickness,0,XmNshadowThickness,1,NULL); XtAddCallback (button, XmNactivateCallback, my_callback, NULL); XtManageChild (button); XtRealizeWidget (toplevel);

XtAppMainLoop (app);}void my_callback (Widget w, XtPointer client_data, XtPointer call_data)

{  XmPushButtonCallbackStruct *cbs =(XmPushButtonCallbackStruct *) call_data;  callWeb();

}void callWeb()

{   EncryptDecryptSoapBindingProxy service; std::string result;

   if (service.encDec(XmTextGetString(text),result) == SOAP_OK)

                {  

                   std::cout << "Result" << result << std::endl;

                   char *cstr = new char[result.length() + 1];

                   strcpy(cstr, result.c_str());

                   XmTextSetString(text1,cstr);

                   delete [] cstr;  

                }

     else

        service.soap_stream_fault(std::cerr);

}


Compile the above code using the following command:
g++ -o Cclient Cclient.c soapC.cpp soapEncryptDecryptSoapBindingProxy.cpp -lgsoap++ -lXm -lXt -lX11

Run the Executable to access the functionality provided by Web Service.