I get an error while calling one of my GWT services.
Eclipse console puts out this:
SCHWERWIEGEND: javax.servlet.ServletContext log: Exception while dispatching incoming RPC call
com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract de.hdm.gruppe09.clickandlove.shared.report.AllInfosOfProfileReport de.hdm.gruppe09.clickandlove.shared.ReportGenerator.createAllInfosOfProfileReport(de.hdm.gruppe09.clickandlove.shared.bo.Profil) throws java.lang.IllegalArgumentException' threw an unexpected exception: java.lang.NullPointerException
.......
Caused by: java.lang.NullPointerException
at de.hdm.gruppe09.clickandlove.server.report.ReportGeneratorImpl.createAllInfosOfProfileReport(ReportGeneratorImpl.java:107)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:130)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:561)
... 40 more
ReportGeneratorImpl.java:107 looks like this (107 is the first of the two Sysos):
103 //Abrufen des eingeloggten Profils. Wird benoetigt für die anschließende Berechnung des Aehnlichkeitsmaßes
104 Profil ep = this.verwaltung.getEingeloggtesProfil();
//Ausgaben über das ep. Nur zu Textzwecken
107 System.out.println("RGImpl: eingeloggtesProfilID:" + ep.getId());
System.out.println("RGImpl: eingeloggtesProfilMail:" + ep.getEmail());
//Abrufen des Aehnlichkeitsma�es
int score = this.verwaltung.berechneAhnlichkeit(p, ep);
System.out.println("RGImpl: Score:" + score);
//Score Int Wert in String umwandeln, da new Column nur String Werte annimmt
String scorestring = Integer.toString(score);
//Setzen des Aehnlichkeitsma�es
Row TopRow = new Row();
TopRow.addColumn(new Column(fullname));
TopRow.addColumn(new Column(scorestring));
Obviously the Object ep must be null. Probably because line 104 fails.
My method fails whenever I use methods of "this.verwaltung".
Here is how I create my object of verwaltung:
private Verwaltung verwaltung = null;
public void init() throws IllegalArgumentException {
VerwaltungImpl a = new VerwaltungImpl();
a.init();
this.verwaltung = a;
}
Since both the "ReportGeneratorImpl" and the VerwatlungImpl" are running on the server I understand that i need no Callbacks to use methods from one another. Is that right?
Obviously the Object ep musst [sic] be null.
Have you considered starting the embedded Jetty server that GWT uses with the debugger and setting a breakpoint on line 104, so that you can step through the code and see what the cause of the NullPointerException is?
See Testing Services During Development here for more details: http://www.gwtproject.org/doc/latest/DevGuideServerCommunication.html
Related
Currently I get the following output from code run
Caused by: java.lang.NullPointerException
at com.gargoylesoftware.htmlunit.html.HtmlScript$2.execute(HtmlScript.java:227)
at com.gargoylesoftware.htmlunit.html.HtmlScript.onAllChildrenAddedToPage(HtmlScript.java:256)
at com.gargoylesoftware.htmlunit.html.parser.neko.HtmlUnitNekoDOMBuilder.endElement(HtmlUnitNekoDOMBuilder.java:560)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
at com.gargoylesoftware.htmlunit.html.parser.neko.HtmlUnitNekoDOMBuilder.endElement(HtmlUnitNekoDOMBuilder.java:514)
at net.sourceforge.htmlunit.cyberneko.HTMLTagBalancer.callEndElement(HTMLTagBalancer.java:1192)
at net.sourceforge.htmlunit.cyberneko.HTMLTagBalancer.endElement(HTMLTagBalancer.java:1132)
at net.sourceforge.htmlunit.cyberneko.filters.DefaultFilter.endElement(DefaultFilter.java:219)
at net.sourceforge.htmlunit.cyberneko.filters.NamespaceBinder.endElement(NamespaceBinder.java:312)
at net.sourceforge.htmlunit.cyberneko.HTMLScanner$ContentScanner.scanEndElement(HTMLScanner.java:3189)
at net.sourceforge.htmlunit.cyberneko.HTMLScanner$ContentScanner.scan(HTMLScanner.java:2114)
at net.sourceforge.htmlunit.cyberneko.HTMLScanner.scanDocument(HTMLScanner.java:937)
at net.sourceforge.htmlunit.cyberneko.HTMLConfiguration.parse(HTMLConfiguration.java:443)
at net.sourceforge.htmlunit.cyberneko.HTMLConfiguration.parse(HTMLConfiguration.java:394)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at com.gargoylesoftware.htmlunit.html.parser.neko.HtmlUnitNekoDOMBuilder.parse(HtmlUnitNekoDOMBuilder.java:760)
at com.gargoylesoftware.htmlunit.html.parser.neko.HtmlUnitNekoHtmlParser.parseFragment(HtmlUnitNekoHtmlParser.java:158)
at com.gargoylesoftware.htmlunit.html.parser.neko.HtmlUnitNekoHtmlParser.parseFragment(HtmlUnitNekoHtmlParser.java:112)
at com.gargoylesoftware.htmlunit.javascript.host.Element.parseHtmlSnippet(Element.java:868)
at com.gargoylesoftware.htmlunit.javascript.host.Element.setInnerHTML(Element.java:920)
at com.gargoylesoftware.htmlunit.javascript.host.html.HTMLElement.setInnerHTML(HTMLElement.java:676)
at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.sourceforge.htmlunit.corejs.javascript.MemberBox.invoke(MemberBox.java:188)
... 30 more
The above ... 30 more means that I do not know the line of my code that causes the problem. How can I get the full stack trace.
Also, if it does not seem to be running any of my catch statements with printStackTrace, but if I turn off logging with the below command
java.util.logging.Logger.getLogger("com.gargoylesoftware.htmlunit").setLevel(java.util.logging.Level.OFF);
java.util.logging.Logger.getLogger("org.apache.http").setLevel(java.util.logging.Level.OFF);
**Have put in my full code below as suggested by the comments below . Did not put in the actual URL though**
import com.gargoylesoftware.htmlunit.html.*;
import java.io.File;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.HtmlPage;
public class download_to_send_to_stackoverflow
{
public static void main(String args[])
{
String url = "did not want to include the actual web site ";
HtmlPage page = null;
WebClient webClient = new WebClient();
webClient.getOptions().setRedirectEnabled(true);
webClient.getOptions().setJavaScriptEnabled(true); // tried making false - but didnt work
webClient.getOptions().setCssEnabled(false);
webClient.getOptions().setUseInsecureSSL(true);
webClient.getOptions().setTimeout(30000);
webClient.setJavaScriptTimeout(30000); //e.g. 50s
webClient.waitForBackgroundJavaScript(15000) ; // added 2017/1/24
webClient.waitForBackgroundJavaScriptStartingBefore(30000) ; // added 2017/1/24
try
{
page = webClient.getPage( url );
savePage_just_html(page );
}
catch( Exception e )
{
System.out.println( "Exception thrown:----------------------------------------" + e.getMessage() );
e.printStackTrace();
}
}
protected static String savePage_just_html(HtmlPage page)
{
try
{
File saveFolder = new File("spool/_");
page.save(saveFolder); // this is the line causing the error with limit stack trace
}
catch ( Exception e )
{
System.out.println( "IOException was thrown: ---------------------------------- " + e.getMessage() );
e.printStackTrace();
}
return "file.html";
}
}
------------------------------------------------------
page.save(saveFolder); above is the problem line. if I take it out I dont get the limited statcktrace errors but I also dont save the html page - which I want to do
- The question is - why does this line only print a limited stacktrace
The "Caused by" means that this is a nested exception.
The "... 30 more" in a nested exception stacktrace means that those 30 lines are the same as in the primary exception.
So just look at the primary stacktrace to see those stack frames.
Apparently your exception stacktraces are being generated in a way that is suppressing (or removing) the primary exception stacktrace. This is puzzling, but it is probably being done by one of the unit testing libraries that you are using.
Getting to the bottom of this will probably involve you either debugging whatever it is that is generating the stacktrace, or writing a minimal reproducible example so that someone else can debug it.
This code works well with just one file as input but when I pass :-
D://beam//csv//*.csv
or D://beam//csv//20*.csv as parameter it throws :-
Exception in thread "main" org.apache.beam.sdk.Pipeline$PipelineExecutionException: java.nio.file.InvalidPathException: Illegal char <*> at index 17: D:\\beam\\csv\\20*.csv
at org.apache.beam.runners.direct.DirectRunner$DirectPipelineResult.waitUntilFinish(DirectRunner.java:332)
at org.apache.beam.runners.direct.DirectRunner$DirectPipelineResult.waitUntilFinish(DirectRunner.java:302)
at org.apache.beam.runners.direct.DirectRunner.run(DirectRunner.java:197)
at org.apache.beam.runners.direct.DirectRunner.run(DirectRunner.java:64)
at org.apache.beam.sdk.Pipeline.run(Pipeline.java:313)
at org.apache.beam.sdk.Pipeline.run(Pipeline.java:299)
at beam.wordcount.TestCsv.main(TestCsv.java:60)
Caused by: java.nio.file.InvalidPathException: Illegal char <*> at index 17: D:\\beam\\csv\\20*.csv
at sun.nio.fs.WindowsPathParser.normalize(Unknown Source)
at sun.nio.fs.WindowsPathParser.parse(Unknown Source)
at sun.nio.fs.WindowsPathParser.parse(Unknown Source)
at sun.nio.fs.WindowsPath.parse(Unknown Source)
at sun.nio.fs.WindowsFileSystem.getPath(Unknown Source)
at java.nio.file.Paths.get(Unknown Source)
at org.apache.beam.sdk.io.LocalFileSystem.matchOne(LocalFileSystem.java:217)
at org.apache.beam.sdk.io.LocalFileSystem.match(LocalFileSystem.java:90)
at org.apache.beam.sdk.io.FileSystems.match(FileSystems.java:119)
at org.apache.beam.sdk.io.FileSystems.match(FileSystems.java:140)
at org.apache.beam.sdk.io.FileSystems.match(FileSystems.java:152)
at org.apache.beam.sdk.io.FileIO$MatchAll$MatchFn.process(FileIO.java:636)
I don't know why it is throwing error , * is used to read multiple files with similar type
CODE
public interface BatchOptions extends PipelineOptions {
#Description("Path to the data file(s) containing game data.")
#Default.String("D:\\beam\\csv\\2020.csv")
String getInput();
void setInput(String value);
}
public static void main(String[] args) {
BatchOptions options = PipelineOptionsFactory.fromArgs(args).withValidation().as(BatchOptions.class);
Pipeline pipeline = Pipeline.create(options);
PCollection lines=pipeline
.apply(FileIO.match().filepattern(options.getInput()))
.apply(FileIO.readMatches());
herepipeline.run().waitUntilFinish();
}
WindowsFileSystem does not expand * and treat it as special character.
I would recommend passing the complete directory like
D://beam//csv//
um trying to instrument a method to do the following task.
Task - Create a Map and insert values to the map
Adding System.out.println lines wouldn't cause any exception. But when i add the line to create the Map, it throws a cannotCompileException due to a missing ;. When i print the final string it doesn't seem to miss any. What am i doing wrong here.
public void createInsertAt(CtMethod method, int lineNo, Map<String,String> parameterMap)
throws CannotCompileException {
StringBuilder atBuilder = new StringBuilder();
atBuilder.append("System.out.println(\"" + method.getName() + " is running\");");
atBuilder.append("java.util.Map<String,String> arbitraryMap = new java.util.HashMap<String,String>();");
for (Map.Entry<String,String> entry : parameterMap.entrySet()) {
}
System.out.println(atBuilder.toString());
method.insertAt(1, atBuilder.toString());
}
String obtained by printing the output of string builder is,
System.out.println("prepareStatement is
running");java.util.Map arbitraryMap = new
java.util.HashMap();
Exception received is,
javassist.CannotCompileException: [source error] ; is missing
at javassist.CtBehavior.insertAt(CtBehavior.java:1207)
at javassist.CtBehavior.insertAt(CtBehavior.java:1134)
at org.wso2.das.javaagent.instrumentation.InstrumentationClassTransformer.createInsertAt(InstrumentationClassTransformer.java:126)
at org.wso2.das.javaagent.instrumentation.InstrumentationClassTransformer.instrumentMethod(InstrumentationClassTransformer.java:100)
at org.wso2.das.javaagent.instrumentation.InstrumentationClassTransformer.transform(InstrumentationClassTransformer.java:37)
at sun.instrument.TransformerManager.transform(TransformerManager.java:188)
at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:424)
at sun.instrument.InstrumentationImpl.retransformClasses0(Native Method)
at sun.instrument.InstrumentationImpl.retransformClasses(InstrumentationImpl.java:144)
at org.wso2.das.javaagent.instrumentation.Agent.premain(Agent.java:39)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:382)
at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:397)
Caused by: compile error: ; is missing
at javassist.compiler.Parser.parseDeclarationOrExpression(Parser.java:594)
at javassist.compiler.Parser.parseStatement(Parser.java:277)
at javassist.compiler.Javac.compileStmnt(Javac.java:567)
at javassist.CtBehavior.insertAt(CtBehavior.java:1186)
... 15 more
(Is there any way to debug these kind of issues.) Some help please.....
Javassist's compiler doesn't support generics. Either remove or comment them out:
.append("java.util.Map arbitraryMap = new java.util.HashMap();")
or
.append("java.util.Map/*<String,String>*/ arbitraryMap = new java.util.HashMap/*<String,String>*/();")
The latter is useful as comment for yourself only, of course, it has no special meaning for Javassist.
I tried to create a lotus notes client using Java. Now, I have a problem to list all the user defined databases. What I tried to do is
// testing purpose
private void printAllDb() throws NotesException
{
DbDirectory dir = session.getDbDirectory(host);
String server = dir.getName();
if(server.equals(""))
{
server = "Local";
}
System.out.println("database direcory list on server (" + server + ")");
Database db = dir.getFirstDatabase(DbDirectory.DATABASE);
do
{
System.out.println("file name: " + db.getFileName().toUpperCase() + " - " + db.getTitle());
} while((db = dir.getNextDatabase()) != null);
}
However, the program will throw the exception:
Exception in thread "main" NotesException: Server access denied
at lotus.domino.NotesExceptionHelper.read(Unknown Source)
at lotus.domino.NotesExceptionHolder._read(Unknown Source)
at lotus.priv.CORBA.iiop.RepImpl.invoke(Unknown Source)
at lotus.priv.CORBA.portable.ObjectImpl._invoke(Unknown Source)
at lotus.domino.corba._IDbDirectoryStub.getFirstDatabase(Unknown Source)
at lotus.domino.cso.DbDirectory.getFirstDatabase(Unknown Source)
at nz.co.sylresearch.sylsearch.agents.lotusnotes.LotusNotesAPIHandler.printAllDb(LotusNotesAPIHandler.java:58)
at nz.co.sylresearch.sylsearch.agents.lotusnotes.LotusNotesAPIHandler.main(LotusNotesAPIHandler.java:44)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
The issue is pretty clear. You are getting an access denied error to the server. The tricky part now is figuring out why.
You should start with making sure the username and password used to create the session object is correct. Then make sure that user has access to the server and has access to run Java code on the server. You'll have to check the server document in the Directory for that.
So, I'm writing code that will create user accounts in AD LDS. I can create the user, but the account is disabled.
I want the user to be active and to be able to change their password. I've tried some of the things suggested in this post, but it hasn't helped me.
Here's my code:
ctx = getConnection(adminUser, adminPassword);
// Create attributes for the new user
Attributes attributes = new BasicAttributes(true);
// Main attributes for user
attributes.put("objectClass", "user");
attributes.put("name", user.getFullName());
attributes.put("ms-DS-User-Account-Control-Computed",
Integer.toString(UF_NORMAL_ACCOUNT + UF_PASSWORD_EXPIRED));
try {
ctx.createSubcontext(getDistinguishedName(user.getFullName()),
attributes);
System.out.println("User successfully added!");
} catch (NamingException e) {
e.printStackTrace();
}
When I run this, I get the following error:
javax.naming.directory.NoSuchAttributeException: [LDAP: error code 16
- 00000057: LdapErr: DSID-0C090D11, comment: Error in attribute conversion operation, data 0, v23f0remaining name 'CN=Samuel
King,CN=Users,CN=Agents,DC=CHESA,DC=local' at
com.sun.jndi.ldap.LdapCtx.mapErrorCode(Unknown Source) at
com.sun.jndi.ldap.LdapCtx.processReturnCode(Unknown Source) at
com.sun.jndi.ldap.LdapCtx.processReturnCode(Unknown Source) at
com.sun.jndi.ldap.LdapCtx.c_createSubcontext(Unknown Source) at
com.sun.jndi.toolkit.ctx.ComponentDirContext.p_createSubcontext(Unknown
Source) at
com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.createSubcontext(Unknown
Source) at
com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.createSubcontext(Unknown
Source) at
javax.naming.directory.InitialDirContext.createSubcontext(Unknown
Source) at
com.ceiwc.ActiveDirectory.createUserAccount(ActiveDirectory.java:114)
at com.ceiwc.TestAD.main(TestAD.java:24)
If I change the line where I'm updating the ms-DS-User-Account-Control-Computed to:
attributes.put("ms-DS-User-Account-Control-Computed", UF_NORMAL_ACCOUNT
+ UF_PASSWORD_EXPIRED);
i get the following error:
javax.naming.directory.InvalidAttributeValueException: Malformed
'ms-DS-User-Account-Control-Computed' attribute value; remaining name
'CN=Samuel King,CN=Users,CN=Agents,DC=CHESA,DC=local' at
com.sun.jndi.ldap.LdapClient.encodeAttribute(Unknown Source) at
com.sun.jndi.ldap.LdapClient.add(Unknown Source) at
com.sun.jndi.ldap.LdapCtx.c_createSubcontext(Unknown Source) at
com.sun.jndi.toolkit.ctx.ComponentDirContext.p_createSubcontext(Unknown
Source) at
com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.createSubcontext(Unknown
Source) at
com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.createSubcontext(Unknown
Source) at
javax.naming.directory.InitialDirContext.createSubcontext(Unknown
Source) at
com.ceiwc.ActiveDirectory.createUserAccount(ActiveDirectory.java:116)
at com.ceiwc.TestAD.main(TestAD.java:24)
So, what am I doing wrong? Is this the proper way to activate the account? Does someone have any code to help me out?
Thanks!
NuAlphaMan,
I think, that the exception has something to do with the fact that you use CN as the name of the attribute instead of Ldap-Display-Name which is msDS-User-Account-Control-Computed. The description could be found here http://msdn.microsoft.com/en-us/library/windows/desktop/ms677840(v=vs.85).aspx.
As to the second question of how to activate an account, I've found that there is an attribute userAccountControl (http://msdn.microsoft.com/en-us/library/windows/desktop/ms680832(v=vs.85).aspx#win_2008_r2) and the value 0x00000002 (ADS_UF_ACCOUNTDISABLE) that can disable an account. The only thing that crosses my mind is to try to read the value and flip the bit.
Regards, Dmitry
NoSuchAttributeException: "Indicates that the attribute specified in the modify or compare operation does not exist in the entry."
Malformed 'ms-DS-User-Account-Control-Computed' attribute value: means wrong attribute type.
here is my working example, that i check with ActiveDirectory 2008:
public void mapToContext(int userAccountControl, DirContextAdapter context) {
context.setAttributeValue("userAccountControl", disableAccount(userAccountControl));
}
private String disableAccount(int userAccountControl) {
userAccountControl |= AccountControlFlags.ACCOUNTDISABLE;
return String.valueOf(userAccountControl);
}