hi, I need a session id for the current session. I

Hi Ankit, it looks like you defined webServiceContext, but never initialized it, so the value is null. Check out docs.oracle.com/.../stateful.htm Example 10-1 Accessing HTTP Session on the Server
for information on getting the context of the WebServiceContent in order to get the session.

i have included WebServiceContent i am getting following error.18:53:46,233 INFO [stdout] (default-short-running-threads-threads - 49) com.appiancorp.suiteapi.common.exceptions.AppianException: Unable to match input for class class com.appiancorp.services.WebServiceContext

import javax.servlet.http.HttpSession;

import org.apache.log4j.Logger;

import com.appiancorp.suiteapi.common.Name;
import com.appiancorp.suiteapi.content.ContentService;
import com.appiancorp.suiteapi.process.exceptions.SmartServiceException;
import com.appiancorp.suiteapi.process.framework.AppianSmartService;
import com.appiancorp.suiteapi.process.framework.Input;
import com.appiancorp.suiteapi.process.framework.MessageContainer;
import com.appiancorp.suiteapi.process.framework.Required;
import com.appiancorp.suiteapi.process.framework.SmartServiceContext;
import com.appiancorp.services.*;
import javax.servlet.http.HttpSession;


import com.appiancorp.suiteapi.process.palette.PaletteInfo;

@PaletteInfo(paletteCategory = "Integration Services", palette = "Connectivity Services")
public class getSessionIdSS extends AppianSmartService {

          private static final Logger LOG = Logger.getLogger(getSessionIdSS.class);
          private final SmartServiceContext smartServiceCtx;
          private String param0;
          private String param1;
          private String sessionID;
          private String return1;
          private WebServiceContext webServiceContext;
          //private ASLIdentity aSLIdentity;
          private ContentService _cs;
          private HttpSession httpSession;
          

          @Override
          public void run() throws SmartServiceException {
                    
                     httpSession=(HttpSession)webServiceContext.getSession();
                    
                     System.out.println(httpSession.getId());
                     sessionID=httpSession.getId();
                    }

          public getSessionIdSS(SmartServiceContext smartServiceCtx, ContentService _cs, WebServiceContext webServiceContext) {
                    super();
                    this.smartServiceCtx = smartServiceCtx;
                    this._cs=_cs;
                    this.webServiceContext=webServiceContext;
          }
          
          

          public void onSave(MessageContainer messages) {
          }

          public void validate(MessageContainer messages) {
          }

          @Input(required = Required.OPTIONAL)
          @Name("param0")
          public void setParam0(String val) {
                    this.param0 = val;
          }

          @Input(required = Required.OPTIONAL)
          @Name("param1")
          public void setParam1(String val) {
                    this.param1 = val;
          }

          @Name("SessionID")
          public String getSessionID() {
                    return sessionID;
          }

          @Name("return1")
          public String getReturn1() {
                    return return1;
          }

}



error:

18:53:46,233 INFO [stdout] (default-short-running-threads-threads - 49) com.appiancorp.suiteapi.common.exceptions.AppianException: Unable to match input for class class com.appiancorp.services.WebServiceContext