Develop Reference

How do i screenshot chrome browser when my tests fail and before the chrome browser closes (#After)

I have ran this code and the screenshot gets captured after the chrome browser closes (#After)
If i comment out CloseBrowser(); the screenshot gets captured but the chromebrowser stay open.
I want the screenshot to capture on a failed test then close the browser.
in summary
The screenshot currently captures after the browser closes, which is just a blank .png
I want the screenshot to capture when a test fails just before the browser closes
Thanks
public class TestClass extends classHelper//has BrowserSetup(); and CloseBrowser(); {
#Rule
public ScreenshotTestRule my = new ScreenshotTestRule();
#Before
public void BeforeTest()
{
BrowserSetup();// launches chromedriver browser
}
#Test
public void ViewAssetPage()
{
//My test code here//And want to take screenshot on failure
}
#After
public void AfterTest() throws InterruptedException
{
CloseBrowser();//closes the browser after test passes or fails
}
}
class ScreenshotTestRule implements MethodRule {
public Statement apply(final Statement statement, final FrameworkMethod frameworkMethod, final Object o) {
return new Statement() {
#Override
public void evaluate() throws Throwable {
try {
statement.evaluate();
} catch (Throwable t) {
captureScreenshot(frameworkMethod.getName());
throw t; // rethrow to allow the failure to be reported to JUnit
}
}
public void captureScreenshot(String fileName) {
try {
new File("target/surefire-reports/").mkdirs(); // Insure directory is there
FileOutputStream out = new FileOutputStream("target/surefire-reports/screenshot-" + fileName + ".png");
out.write(((TakesScreenshot) driver).getScreenshotAs(OutputType.BYTES));
out.close();
} catch (Exception e) {
// No need to crash the tests if the screenshot fails
}
}
};
}
}

You can implement TestNG Listeners to execute code before a test or after a test
Or when a test fails or succeeded etc.
Implement it like below and put your screenshot in the method i showed
public class Listeners implements ITestListener {
Methods…
And put the screenshot code inside the method below:
#Override
public void onTestFailure(ITestResult result) {
code for screenshot
}
}

So i have found a way to implement the screenshots. I have created a method that will take a screenshot. I have put a try and catch around my test code and catch an exception and calling the method to take a screenshot.
public class TestClass extends classHelper//has BrowserSetup(); and CloseBrowser(); {`
#Rule
public ScreenshotTestRule my = new ScreenshotTestRule();
#Before
public void BeforeTest()
{
BrowserSetup();// launches chromedriver browser
}
#Test
public void ViewAssetPage()
{
try
{
//My test code here//And want to take screenshot on failure
}
catch(Exception e)
{
//print e
takeScreenShot();
}
}
#After
public void AfterTest() throws InterruptedException
{
CloseBrowser();//closes the browser after test passes or fails
}
}
///////////////////////////////////////////
void takeScreenShot()
{
try
{
int num = 0;
String fileName = "SS"+NAME.getMethodName()+".png";//name of file/s you wish to create
String dir = "src/test/screenshot";//directory where screenshots live
new File(dir).mkdirs();//makes new directory if does not exist
File myFile = new File(dir,fileName);//creates file in a directory n specified name
while (myFile.exists())//if file name exists increment name with +1
{
fileName = "SS"+NAME.getMethodName()+(num++)+".png";
myFile = new File(dir,fileName);
}
FileOutputStream out = new FileOutputStream(myFile);//creates an output for the created file
out.write(((TakesScreenshot) driver).getScreenshotAs(OutputType.BYTES));//Takes screenshot and writes the screenshot data to the created file
//FileOutputStream out = new FileOutputStream("target/surefire-reports/" + fileName);
out.close();//closes the outputstream for the file
}
catch (Exception e)
{
// No need to crash the tests if the screenshot fails
}

This might help:
https://github.com/junit-team/junit4/issues/383
The ordering for rule execution has changed with new 'TestRule'

Java - Runnable, lambda function, and methods of class

I'm quite new with Java (studied on University but was version 2).
Now I've developed an application that downloads files from s3 in parallel. I've used ExecutorService and Runnable to download multiple files in parallel in this way:
public class DownloaderController {
private AmazonS3 s3Client;
private ExecutorService fixedPool;
private TransferManager dlManager;
private List<MultipleFileDownload> downloads = new ArrayList<>();
public DownloaderController() {
checkForNewWork();
}
public void checkForNewWork(){
Provider1 provider = new Provider1();
fixedPool = Executors.newFixedThreadPool(4);
List<Download> providedDownloadList = provider.toBeDownloaded();
for (Download temp : providedDownloadList) {
if (!downloadData.contains(temp)) {
fixedPool.submit(download.downloadCompletedHandler(s3Client));
}
}
}
}
public void printToTextArea(String msg){
Date now = new Date();
if ( !DateUtils.isSameDay(this.lastLogged, now)){
this._doLogRotate();
}
this.lastLogged = now;
SimpleDateFormat ft = new SimpleDateFormat("dd/MM/yyyy H:mm:ss");
String output = "[ " + ft.format(now) + " ] " + msg + System.getProperty("line.separator");
Platform.runLater(() -> {
//this is a FXML object
statusTextArea.appendText(output);
});
}
}
public class Provider1 implements downloadProvider {
}
public class Download {
abstract Runnable downloadCompletedHandler(AmazonS3 s3Client);
}
public class DownloadProvider1 extends Download {
#Override
public Runnable downloadCompletedHandler(AmazonS3 s3Client){
Runnable downloadwork = () -> {
ObjectListing list = s3Client.listObjects(this.bucket,this.getFolder());
List<S3ObjectSummary> objects = list.getObjectSummaries();
AtomicLong workSize = new AtomicLong(0);
List<DeleteObjectsRequest.KeyVersion> keys = new ArrayList<>();
objects.forEach(obj -> {
workSize.getAndAdd(obj.getSize());
keys.add((new DeleteObjectsRequest.KeyVersion(obj.getKey())));
});
MultipleFileDownload fileDownload = dlManager.downloadDirectory("myBucket","folder","outputDirectory");
try {
fileDownload.waitForCompletion();
} catch (Exception e){
printToTextArea("Exception while download from AmazonS3");
}
};
return downloadwork;
}
}
In the downloadController i call every minute a function that adds some Download objects to a List that contains folders that has to be downloaded from s3. when a new Download is added it's also added to ExecutorService pool. The Download object returns the code that has to be executed to download the folder from s3 and what to do when it's download is finished.
My problem is, what is the best way to communicate between the Runnable and the DownloadController ?

Your code does not make entirely clear what the goal is. From what I understand, I would have done it something like this:
public class Download {
private AmazonS3 s3Client;
public Download(AmazonS2 client) { s3Client = client; }
public void run() { // perform download }
}
That class does nothing but download the file (cfg Separation of Concern) and is a Runnable. You can do executorService.submit(new Download(client)) and the download will be finished eventually; also, you can test it without being called concurrently.
Now, you want a callback method for logging it being finished.
public class LoggingCallback {
public void log() {
System.out.println("finished");
}
}
Also a Runnable (the method doesn't have to be run()).
And, to make sure it's triggered one after the other, maybe
class OneAfterTheOther {
private Runnable first;
private Runnable second;
public OneAfterTheOther(Runnable r1, Runnable r2) {
first = r1; second = r2;
}
public void run() { first.run(); second.run(); }
}
which if submitted like this
Download dl = new Download(client);
Logger l = new LoggingCallback();
executorService.submit(new OneAfterTheOther(dl::run, l::log));
will do what I think you're trying to do.

LibGDX Gdxpay requestPurchase not working

I've implemented Gdxpay into my libgdx game but when I call requestPurchase(), nothing happens. I followed this tutorial https://github.com/libgdx/gdx-pay/wiki/Integration-example-with-resolvers but I'm not sure where I'm going wrong.
Here is the main game class where the purchase observer is:
public MyGame extends Application adapter {
public MyGame(IActivityRequestHandler handler) {
// TODO Auto-generated constructor stub
super();
myRequestHandler = handler;
// ---- IAP: define products ---------------------
purchaseManagerConfig = new PurchaseManagerConfig();
purchaseManagerConfig.addOffer(new Offer().setType(OfferType.ENTITLEMENT).setIdentifier(SKU_REMOVE_ADS));
}
public PurchaseObserver purchaseObserver = new PurchaseObserver() {
#Override
public void handleRestore (Transaction[] transactions) {
for (int i = 0; i < transactions.length; i++) {
if (checkTransaction(transactions[i].getIdentifier()) == true) break;
}
// to make a purchase (results are reported to the observer)
PurchaseSystem.purchase(SKU_REMOVE_ADS);
}
#Override
public void handleRestoreError (Throwable e) {
// getPlatformResolver().showToast("PurchaseObserver: handleRestoreError!");
Gdx.app.log("ERROR", "PurchaseObserver: handleRestoreError!: " + e.getMessage());
throw new GdxRuntimeException(e);
}
#Override
public void handleInstall () {
// getPlatformResolver().showToast("PurchaseObserver: installed successfully...");
Gdx.app.log("handleInstall: ", "successfully..");
}
#Override
public void handleInstallError (Throwable e) {
//getPlatformResolver().showToast("PurchaseObserver: handleInstallError!");
Gdx.app.log("ERROR", "PurchaseObserver: handleInstallError!: " + e.getMessage());
throw new GdxRuntimeException(e);
}
#Override
public void handlePurchase (Transaction transaction) {
checkTransaction(transaction.getIdentifier());
}
#Override
public void handlePurchaseError (Throwable e) {
if (e.getMessage().equals("There has been a Problem with your Internet connection. Please try again later")) {
// this check is needed because user-cancel is a handlePurchaseError too)
// getPlatformResolver().showToast("handlePurchaseError: " + e.getMessage());
}
throw new GdxRuntimeException(e);
}
#Override
public void handlePurchaseCanceled () {
}
};
protected boolean checkTransaction (String ID) {
boolean returnbool = false;
if (SKU_REMOVE_ADS.equals(ID)) {
myRequestHandler.showAds(false);
returnbool = true;
}
return returnbool;
}
public void create() {
...
Here is where requestPurchase is called:
public class MainMenu extends Screen {
#Override
public void update() {
...
if (removeBounds.contains(touchPoint.x, touchPoint.y)) {
MyGame.getPlatformResolver().requestPurchase(MyGame.SKU_REMOVE_ADS);
}
}
...
}
Many thanks.
Edit: Ok logcat says the following error when I request a purchase:
5188-5220/com.comp.myGame.android I/ERROR﹕ gdx-pay: requestPurchase(): purchaseManager == null
So that means pruchaseManager is null, but according to the tutorial in this instance it should cause the correct purchaseManager to be called so I'm still confused...

I had exactly the same issue. I followed the tutorial as well, but changed the distributed resolver system to a more local defined system where all app store keys are set in the main game class.
This didn't work (with the same error you got). I then re-engineered the code to follow exactly the tutorial - with all the resolver bells and whistles. Next, I got a "no suitable app store found" error while creating the purchaseManager (at this point, I celebrated because it at least TRIED to create it).
I think that it worked the second try has something to do with the sequence flow:
In the android/AndroidLauncher.java, onCreate:
MyGame myGame = new MyGame(this);
initialize(myGame, config);
// init IAP
myGame.setPlatformResolver(new AndroidResolver(myGame, this));
In core/MyGame.java, declarations:
public PurchaseObserver purchaseObserver = new BrainsPurchaseObserver();
public PurchaseManagerConfig purchaseManagerConfig;
In core/MyGame.java, constructor:
purchaseManagerConfig = new PurchaseManagerConfig();
Offer iap15Tipps = new Offer();
iap15Tipps.setIdentifier(Product.brains_hints_15.name());
iap15Tipps.setType(OfferType.CONSUMABLE);
purchaseManagerConfig.addOffer(iap15Tipps);
PlatformResolver.java and AndroidResolver.java as described in the tutorial. This worked to the point of the above error "no app store found".
Then I switched from gdx-pay 0.3.0 to 0.4.0 (by just incrementing the version in the gradle settings, it is already available in the repository), AND IT WORKED!
I suggest you check the sequence of IAP initializing you execute and switch to 0.4.0 if you are not already using it.
-- Michael

Vaadin Upload component how get fileName before submitUpload?

I try make implementation for comparing the files before they are uploaded.
If file whith name is exist in system ask about create new version or just override it.
Here is the problem, how to get file name?
I can't use receiveUpload(), because after this method file is remove from upload component ?

The problem is that once you start an upload using the Upload component, it can only be interrupted by calling the interruptUpload() method, and you cannot resume anytime later.
The interruption is permanent.
This means you cannot pause in the middle of the upload to see if you already have the file in your system. You have to upload the file all the way.
Considering this drawback, you can sill check in your system if you have the file, after the upload finishes. If you have the file, you can show a confirmation dialog in which you decide wether to keep the file or overwrite.
The following is an example in which I check in the "system" (I just keep a String list with the filenames) if the file has already been uploaded:
public class RestrictingUpload extends Upload implements Upload.SucceededListener, Upload.Receiver {
private List<String> uploadedFilenames;
private ByteArrayOutputStream latestUploadedOutputStream;
public RestrictingUpload() {
setCaption("Upload");
setButtonCaption("Upload file");
addSucceededListener(this);
setReceiver(this);
uploadedFilenames = new ArrayList<String>();
}
#Override
public OutputStream receiveUpload(String filename, String mimeType) {
latestUploadedOutputStream = new ByteArrayOutputStream();
return latestUploadedOutputStream;
}
#Override
public void uploadSucceeded(SucceededEvent event) {
if (fileExistsInSystem(event.getFilename())) {
confirmOverwrite(event.getFilename());
} else {
uploadedFilenames.add(event.getFilename());
}
}
private void confirmOverwrite(final String filename) {
ConfirmDialog confirmDialog = new ConfirmDialog();
String message = String.format("The file %s already exists in the system. Overwrite?", filename);
confirmDialog.show(getUI(), "Overwrite?", message, "Overwrite", "Cancel", new ConfirmDialog.Listener() {
#Override
public void onClose(ConfirmDialog dialog) {
if (dialog.isConfirmed()) {
copyFileToSystem(filename);
}
}
});
}
private void copyFileToSystem(String filename) {
try {
IOUtils.write(latestUploadedOutputStream.toByteArray(), new FileOutputStream(filename));
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e2) {
e2.printStackTrace();
}
}
private boolean fileExistsInSystem(String filename) {
return uploadedFilenames.contains(filename);
}
}
Note that I have used 2 external libraries:
Apache Commons IO 2.4 (http://mvnrepository.com/artifact/commons-io/commons-io/2.4) for writing to streams
ConfirmDialog from Vaadin Directory (https://vaadin.com/directory#addon/confirmdialog)
You can get the code snippet for this class from Gist: https://gist.github.com/gabrielruiu/9960772 which you can paste into your UI and test it out.

JavaFX for server-side image generation

This could sound strange but I want to generate my chart images on server side using JavaFX. Because JavaFX has nice canvas API to perform image transformations joins and positioning.
In particular I have a spring MVC service to generate my charts as images.
The main problem is how to invoke javaFX API from a convenient Spring bean.
If I try to just run javafx code from java application (not extending javaFX Application class) I get
java.lang.IllegalStateException: Toolkit not initialized
Do you have any suggestions/ideas how to solve this issue?

So after some research I've implemented canvas draw with JavaFX and here is a simplified example:
First I made the JavaFX application which is being launched in a separate thread (I use Spring taskExecutor but a plain java thread can be used).
public class ChartGenerator extends Application {
private static Canvas canvas;
private static volatile byte[] result;
public static void initialize(TaskExecutor taskExecutor) {
taskExecutor.execute(new Runnable() {
#Override
public void run() {
launch(ChartGenerator.class);
}
});
}
public static synchronized byte[] generateChart(final Object... params) {
Platform.runLater(new Runnable() {
#Override
public void run() {
ByteArrayOutputStream baos = null;
try {
GraphicsContext gc = canvas.getGraphicsContext2D();
gc.clearRect(0, 0, canvas.getWidth(), canvas.getHeight());
/**
* Do the work with canvas
**/
final SnapshotParameters snapshotParameters = new SnapshotParameters();
snapshotParameters.setFill(Color.TRANSPARENT);
WritableImage image = canvas.snapshot(snapshotParameters, null);
BufferedImage bImage = SwingFXUtils.fromFXImage(image, null);
baos = new ByteArrayOutputStream();
ImageIO.write(bImage, chartType.outputFormat, baos);
result = baos.toByteArray();
} catch (InstantiationException e) {
throw new ChartGenerationException(e);
} catch (IllegalAccessException e) {
throw new ChartGenerationException(e);
} catch (NoSuchMethodException e) {
throw new ChartGenerationException(e);
} catch (InvocationTargetException e) {
throw new ChartGenerationException(e);
} catch (IOException e) {
throw new ChartGenerationException(e);
} finally {
IOUtils.closeQuietly(baos);
}
}
});
while (result == null) {
//wait
}
byte[] ret = result;
result = null;
return ret;
}
#Override
public void start(Stage stage) {
canvas = new Canvas();
}
public static class ChartGenerationException extends RuntimeException {
public ChartGenerationException(String message) {
super(message);
}
public ChartGenerationException(Throwable cause) {
super(cause);
}
}
}
Then I call the initialize() method when the Spring application is started:
#Autowired private TaskExecutor taskExecutor;
#PostConstruct private void initChartGenerator() {
ChartGenerator.initialize(taskExecutor);
}
This solution of cource can be ported to a non-Spring application.
This is a single-threaded solution (in my case it's enough) but I think it could be adopted to multithreaded usage (maybe use RMI to invoke draw method).
Also this solution works "as is" on my windows workstation but on linux server environment some additional actions should be invoked:
You cannot use JavaFX on OpenJDK (as of Aug 2013) - have to switch to Oracle JDK
Java version must be no less than Java 7u6
The most complex - you have to use virtual display to make JavaFX run on headless environments:
apt-get install xvfb
// then on application server start:
export DISPLAY=":99"
start-stop-daemon --start --background --user jetty --exec "/usr/bin/sudo" -- -u jetty /usr/bin/Xvfb :99 -screen 0 1024x768x24
P.S. You can also use other JavaFX capabilities on server side (e.g. export html to image) with this solution.

In case other people are looking for this, this is a much simpler way.
Using JavaFX 2.2 i was able to perform the following operations.
waitForInit = new Semaphore(0);
root = new Group();
root.getChildren().add(jfxnode);
FxPlatformExecutor.runOnFxApplication(() -> {
snapshot = jfxnode.snapshot(new SnapshotParameters(), null);
waitForInit.release();
});
waitForInit.acquireUninterruptibly();
BufferedImage bi = SwingFXUtils.fromFXImage(snapshot, null);
There is no need to add the node to a group.
From there you can do any operation you want with the image.
The FxPlatformExecutor is from a JME3-JFX library I am using for my project.
See: https://github.com/empirephoenix/JME3-JFX/blob/master/src/main/java/com/jme3x/jfx/FxPlatformExecutor.java
You can easily create the runOnFxApplication() method or create the FxPlatformExecutor class.
Here is the code.
package com.jme3x.jfx;
import javafx.application.Platform;
/**
* TODO This Class should be replaced by some Workmanager implemntation
* in the future
* #author Heist
*/
public class FxPlatformExecutor {
public static void runOnFxApplication(Runnable task) {
if (Platform.isFxApplicationThread()) {
task.run();
} else {
Platform.runLater(task);
}
}
}
I did not write this code, the github link is above.

Perhaps something similar to this solution would be helpful?
JavaFX 2.1: Toolkit not initialized
Otherwise, I would consider creating a service and pushing the image to a datastore and retrieving it in your spring application.
Hope that provides at least a little help!