GAE/J, PayPal request - NoClassDefFoundError for AuthorizationRequiredException - google-app-engine

Question

I am new to Google App Engine (Java) and PayPal process. I am using tutorial provided http://googleappengine.blogspot.com/2010/06/paypal-introduces-paypal-x-platform.html and NOT sure why I am getting following exception:
Uncaught exception from servlet
java.lang.NoClassDefFoundError: com/paypal/adaptive/exceptions/AuthorizationRequiredException
Here is my Servlet Class file which suppose to do preapproval and provide preapproval key and authorization url ..
import java.io.IOException;
import java.util.logging.Logger;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.paypal.adaptive.api.requests.fnapi.ParallelPay;
import com.paypal.adaptive.api.responses.PayResponse;
import com.paypal.adaptive.core.APICredential;
import com.paypal.adaptive.core.AckCode;
import com.paypal.adaptive.core.CurrencyCodes;
import com.paypal.adaptive.core.PaymentType;
import com.paypal.adaptive.core.Receiver;
import com.paypal.adaptive.core.ServiceEnvironment;
import com.paypal.adaptive.exceptions.AuthorizationRequiredException;
import com.paypal.adaptive.exceptions.InvalidAPICredentialsException;
import com.paypal.adaptive.exceptions.InvalidResponseDataException;
import com.paypal.adaptive.exceptions.MissingAPICredentialsException;
import com.paypal.adaptive.exceptions.MissingParameterException;
import com.paypal.adaptive.exceptions.NotEnoughReceivers;
import com.paypal.adaptive.exceptions.PayPalErrorException;
import com.paypal.adaptive.exceptions.PaymentExecException;
import com.paypal.adaptive.exceptions.PaymentInCompleteException;
import com.paypal.adaptive.exceptions.ReceiversCountMismatchException;
import com.paypal.adaptive.exceptions.RequestAlreadyMadeException;
import com.paypal.adaptive.exceptions.RequestFailureException;
#SuppressWarnings("serial")
public class CWEMartServlet extends HttpServlet {
private static final Logger log = Logger.getLogger(CWEMartServlet.class.getName());
private static APICredential credentialObj;
#Override
public void init(ServletConfig config) throws ServletException {
// TODO Auto-generated method stub
super.init(config);
// Get the value of APIUsername
String APIUsername = getServletConfig().getInitParameter("PPAPIUsername");
String APIPassword = getServletConfig().getInitParameter("PPAPIPassword");
String APISignature = getServletConfig().getInitParameter("PPAPISignature");
String AppID = getServletConfig().getInitParameter("PPAppID");
String AccountEmail = getServletConfig().getInitParameter("PPAccountEmail");
if(APIUsername == null || APIUsername.length() <= 0
|| APIPassword == null || APIPassword.length() <=0
|| APISignature == null || APISignature.length() <= 0
|| AppID == null || AppID.length() <=0 ) {
// requires API Credentials not set - throw exception
throw new ServletException("APICredential(s) missing");
}
credentialObj = new APICredential();
credentialObj.setAPIUsername(APIUsername);
credentialObj.setAPIPassword(APIPassword);
credentialObj.setSignature(APISignature);
credentialObj.setAppId(AppID);
credentialObj.setAccountEmail(AccountEmail);
log.info("Servlet initialized successfully");
}
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
try {
String id = req.getParameter("id");
String title = req.getParameter("title");
String order = req.getParameter("order");
String returnParam = req.getParameter("return");
String cancel = req.getParameter("cancel");
if(cancel != null && cancel.equals("1")) {
// user canceled the payment
getServletConfig().getServletContext().getRequestDispatcher("/paymentcancel.jsp").forward(req, resp);
} else if(returnParam != null && returnParam.equals("1")){
getServletConfig().getServletContext().getRequestDispatcher("/paymentsuccess.jsp").forward(req, resp);
} else if(order != null && order.length() > 0){
// process order
try {
StringBuilder url = new StringBuilder();
url.append(req.getRequestURL());
String returnURL = url.toString() + "?return=1&payKey=${payKey}&id="+ id + "&title=" + title;
String cancelURL = url.toString() + "?cancel=1&id="+ id + "&title=" + title;
//String ipnURL = url.toString() + "?action=ipn";
ParallelPay parallelPay = new ParallelPay(2);
parallelPay.setCancelUrl(cancelURL);
parallelPay.setReturnUrl(returnURL);
parallelPay.setCredentialObj(credentialObj);
parallelPay.setUserIp(req.getRemoteAddr());
parallelPay.setApplicationName("Sample app on GAE");
parallelPay.setCurrencyCode(CurrencyCodes.USD);
parallelPay.setEnv(ServiceEnvironment.SANDBOX);
//parallelPay.setIpnURL(ipnURL);
parallelPay.setLanguage("en_US");
parallelPay.setMemo(title);
// set the receivers
Receiver primaryReceiver = new Receiver();
primaryReceiver.setAmount(5.0);
primaryReceiver.setEmail("jagdis_1325390370_biz#yahoo.com");
primaryReceiver.setPaymentType(PaymentType.GOODS);
parallelPay.addToReceivers(primaryReceiver);
// set the second receivers
Receiver rec1 = new Receiver();
rec1.setAmount(3.0);
rec1.setEmail("jagdis_1331173124_biz#yahoo.com");
rec1.setPaymentType(PaymentType.GOODS);
parallelPay.addToReceivers(rec1);
PayResponse payResponse = parallelPay.makeRequest();
log.info("Payment success - payKey:" + payResponse.getPayKey());
} catch (IOException e) {
resp.getWriter().println("Payment Failed w/ IOException");
} catch (MissingAPICredentialsException e) {
// No API Credential Object provided - log error
e.printStackTrace();
resp.getWriter().println("No APICredential object provided");
} catch (InvalidAPICredentialsException e) {
// invalid API Credentials provided - application error - log error
e.printStackTrace();
resp.getWriter().println("Invalid API Credentials " + e.getMissingCredentials());
} catch (MissingParameterException e) {
// missing parameter - log error
e.printStackTrace();
resp.getWriter().println("Missing Parameter error: " + e.getParameterName());
} catch(ReceiversCountMismatchException e){
// missing receiver - log error
e.printStackTrace();
resp.getWriter().println("Receiver count did not match - expected: "
+ e.getExpectedNumberOfReceivers()
+ " - actual:" + e.getActualNumberOfReceivers());
} catch (RequestFailureException e) {
// HTTP Error - some connection issues ?
e.printStackTrace();
resp.getWriter().println("Request HTTP Error: " + e.getHTTP_RESPONSE_CODE());
} catch (InvalidResponseDataException e) {
// PayPal service error
// log error
e.printStackTrace();
resp.getWriter().println("Invalid Response Data from PayPal: \"" + e.getResponseData() + "\"");
} catch (PayPalErrorException e) {
// Request failed due to a Service/Application error
e.printStackTrace();
if(e.getResponseEnvelope().getAck() == AckCode.Failure){
// log the error
resp.getWriter().println("Received Failure from PayPal (ack)");
resp.getWriter().println("ErrorData provided:");
resp.getWriter().println(e.getPayErrorList().toString());
if(e.getPaymentExecStatus() != null){
resp.getWriter().println("PaymentExecStatus: " + e.getPaymentExecStatus());
}
} else if(e.getResponseEnvelope().getAck() == AckCode.FailureWithWarning){
// there is a warning - log it!
resp.getWriter().println("Received Failure with Warning from PayPal (ack)");
resp.getWriter().println("ErrorData provided:");
resp.getWriter().println(e.getPayErrorList().toString());
}
} catch (RequestAlreadyMadeException e) {
// shouldn't occur - log the error
e.printStackTrace();
resp.getWriter().println("Request to send a request that has already been sent!");
} catch (PaymentExecException e) {
resp.getWriter().println("Failed Payment Request w/ PaymentExecStatus: " + e.getPaymentExecStatus().toString());
resp.getWriter().println("ErrorData provided:");
resp.getWriter().println(e.getPayErrorList().toString());
}catch (PaymentInCompleteException e){
resp.getWriter().println("Incomplete Payment w/ PaymentExecStatus: " + e.getPaymentExecStatus().toString());
resp.getWriter().println("ErrorData provided:");
resp.getWriter().println(e.getPayErrorList().toString());
} catch (NumberFormatException e) {
// invalid number passed
e.printStackTrace();
resp.getWriter().println("Invalid number of receivers sent");
} catch (NotEnoughReceivers e) {
// not enough receivers - min requirements for Parallel pay not met
e.printStackTrace();
resp.getWriter().println("Min number of receivers not met - Min Required:"
+ e.getMinimumRequired() + " - actual set:" + e.getActualNumber());
} catch (AuthorizationRequiredException e) {
// redirect the user to PayPal for Authorization
resp.getWriter().println("\"PPAuthzUrl\": \"" + e.getAuthorizationUrl(ServiceEnvironment.SANDBOX) + "\", \"Status\": \"CREATED\"");
// resp.sendRedirect(e.getAuthorizationUrl(ServiceEnvironment.SANDBOX));
// resp.getWriter().println("\"PPAuthzUrl\": \"" + e.getEmbeddedPaymentsAuthorizationUrl(ServiceEnvironment.SANDBOX, ExpType.LIGHTBOX) + "\", \"Status\": \"CREATED\"");
}
} else if(id == null || id.length() <= 0) {
getServletConfig().getServletContext().getRequestDispatcher("/index.jsp").forward(req, resp);
} else {
getServletConfig().getServletContext().getRequestDispatcher("/order.jsp").forward(req, resp);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}

Answer 1

Check if you have the paypal.jar in lib directory. If you are not sure, unjar the paypal related lib files and check if you have AuthorizationRequiredException.class in at least one of them.