I have the following code
desktop = Desktop.isDesktopSupported() ? Desktop.getDesktop() : null;
url = new URL("http://www.facebook.com");
if (desktop != null && desktop.isSupported(Desktop.Action.BROWSE)) {
try {
desktop.browse(url.toURI());
} catch (Exception e) {
e.printStackTrace();
}
and desktop is returning null for Windows 7. Can anyone suggest what to be done ?
Not sure it's not working with Windows 7 (it worked at me), but Desktop can return false negatives anyway. I had a similar problem and the only way around I could find, is opening the system browser the hard way, using java.lang.Runtime
for windows, your code will be
Runtime.getRuntime().exec( "rundll32 url.dll,FileProtocolHandler " + url);
a very nice fully working code that covers OSX and Linux too can be be found here
From the documentation:
public static boolean isDesktopSupported()
Tests whether this class is supported on the current platform. If it's supported, use getDesktop() to retrieve an instance.
Returns:
true if this class is supported on the current platform; false otherwise
To make it short:
Windows 7 does not support this class
See also: similar question
See also: desktop api documentation
Related
In my quarkus application i'm using micrometer to retrieve metrics (like in this guide : https://quarkus.io/guides/micrometer).
In JVM mode everything works fine, but in native mode system_cpu_usage is "Nan".
I tried bumping micrometer to 1.8.4 and adding :
{
"name":"com.sun.management.OperatingSystemMXBean", "allPublicMethods": true
},
to my reflect-config.json but no luck. I also tried generating the reflect-config (and other native configuration files) with the graalvm tracing agent but still no luck.
This may be a bug.
Micrometer is looking for a few known implementations of the MXBean:
https://github.com/micrometer-metrics/micrometer/blob/b087856355667abf9bf2386265edef8642e0e077/micrometer-core/src/main/java/io/micrometer/core/instrument/binder/system/ProcessorMetrics.java#L55
private static final List<String> OPERATING_SYSTEM_BEAN_CLASS_NAMES = Arrays.asList(
"com.ibm.lang.management.OperatingSystemMXBean", // J9
"com.sun.management.OperatingSystemMXBean" // HotSpot
);
so that it can find the methods that it should be invoking...
https://github.com/micrometer-metrics/micrometer/blob/b087856355667abf9bf2386265edef8642e0e077/micrometer-core/src/main/java/io/micrometer/core/instrument/binder/system/ProcessorMetrics.java#L80
this.operatingSystemBean = ManagementFactory.getOperatingSystemMXBean();
this.operatingSystemBeanClass = getFirstClassFound(OPERATING_SYSTEM_BEAN_CLASS_NAMES);
Method getCpuLoad = detectMethod("getCpuLoad");
this.systemCpuUsage = getCpuLoad != null ? getCpuLoad : detectMethod("getSystemCpuLoad");
this.processCpuUsage = detectMethod("getProcessCpuLoad");
(Note specifically "getFirstClassFound", which is constrained against the first list).
Speculation on my part, but I suspect Graal is returning a different type, which is possible from here:
https://github.com/oracle/graal/blob/6ba65dad76a4f54fa59e1ed2a62dedd3afe39928/substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jdk/management/ManagementSupport.java#L166
would take some digging to know which, but I would open an issue with Micrometer so we can sort it out.
I'm making a .net core API to control the led lights from my pi, but I'm facing the following error: System.ArgumentException:
No I2C device exists for bus ID 1.
I tried to find some info on how to find the busid of the grovepi but didn't came far. Tried also numbers 1 to 5 also didn't came far.
This is my code:
[1] https://gyazo.com/aa01ab3068201360c3ece14f125b1c45
My error:
[2] https://gyazo.com/6bf3215e4466b02643b6a9eb92d12e52
I expected to turn the light on and get a page with some text but I keep getting the same error.
I can reproduce this issue. I tracked the exception, it is thrown here. I posted an issue(#590) in GitHub.
public Windows10I2cDevice(I2cConnectionSettings settings)
{
_settings = settings;
var winSettings = new WinI2c.I2cConnectionSettings(settings.DeviceAddress);
string busFriendlyName = $"I2C{settings.BusId}";
string deviceSelector = WinI2c.I2cDevice.GetDeviceSelector(busFriendlyName);
DeviceInformationCollection deviceInformationCollection = DeviceInformation.FindAllAsync(deviceSelector).WaitForCompletion();
if (deviceInformationCollection.Count == 0)
{
throw new ArgumentException($"No I2C device exists for bus ID {settings.BusId}.", $"{nameof(settings)}.{nameof(settings.BusId)}");
}
_winI2cDevice = WinI2c.I2cDevice.FromIdAsync(deviceInformationCollection[0].Id, winSettings).WaitForCompletion();
if (_winI2cDevice == null)
{
throw new PlatformNotSupportedException($"I2C devices are not supported.");
}
}
As we know, .net core 3.0 for IoT is preview. May i know why don't you consider to use traditional way to do that? A workaround is, you can host a web server in a UWP app, and you can add the LED control in the UWP app. Please refer to IoTWeb.
What I want to do?
I want to create and consume java objects in PowerBuilder and call methods on it. This should happen with less overhead possible.
I do not want to consume java webservices!
So I've a working sample in which I can create a java object, call a method on this object and output the result from the called method.
Everything is working as expected. I'm using Java 1.8.0_31.
But now I want to attach my java IDE (IntelliJ) to the running JVM (started by PowerBuilder) to debug the java code which gets called by PowerBuilder.
And now my question.
How do I tell PowerBuilder to add special options when starting the JVM?
In special I want to add the following option(s) in some way:
-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005
The JVM is created like following:
LONG ll_result
inv_java = CREATE JavaVM
ll_result = inv_java.CreateJavaVM("C:\Development\tms java\pbJavaTest", FALSE)
CHOOSE CASE ll_result
CASE 1
CASE 0
CASE -1
MessageBox ( "", "jvm.dll was not found in the classpath.")
CASE -2
MessageBox ( "", "pbejbclient90.jar file was not found." )
CASE ELSE
MessageBox ( "", "Unknown result (" + String (ll_result ) +")" )
END CHOOSE
In the PowerBuilder help I found something about overriding the static registry classpath. There is something written about custom properties which sounds like what I'm looking for.
But there's no example on how to add JVM options to override default behavior.
Does anyone have a clue on how to tell PowerBuilder to use my options?
Or does anyone have any advice which could guide me in the right direction?
Update 1
I found an old post which solved my initial issue.
If someone else want to know how it works take a look at this post:
http://nntp-archive.sybase.com/nntp-archive/action/article/%3C46262213.6742.1681692777#sybase.com%3E
Hi, you need to set some windows registry entries.
Under HKEY_LOCAL_MACHINE\SOFTWARE\Sybase\Powerbuilder\9.0\Java, there
are two folders: PBIDEConfig and PBRTConfig. The first one is used when
you run your application from within the IDE, and the latter is used
when you run your compiled application. Those two folders can have
PBJVMconfig and PBJVMprops folders within them.
PBJVMconfig is for JVM configuration options such as -Xms. You have to
specify incremental key values starting from "0" by one, and one special
key "Count" to tell Powerbuilder how many options exists to enumerate.
PBJVMprops is for all -D options. You do not need to specify -D for
PBJVMProps, just the name of the property and its value, and as many
properties as you wish.
Let me give some examples:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Sybase\PowerBuilder\9.0\Java\PBIDEConfig\PBJVMprops]
"java.security.auth.login.config"="auth.conf"
"user.language"="en"
[HKEY_LOCAL_MACHINE\SOFTWARE\Sybase\PowerBuilder\9.0\Java\PBRTConfig\PBJVMconfig]
"0"="-client"
"1"="-Xms128m"
"2"="-Xmx512m"
"Count"="3"
[HKEY_LOCAL_MACHINE\SOFTWARE\Sybase\PowerBuilder\9.0\Java\PBRTConfig\PBJVMprops]
"java.security.auth.login.config"="auth.conf"
"user.language"="en"
Regards,
Gokhan Demir
But now there's another issue...
PB isn't able to create EJB Proxies for my sample class which is really simple with java 1.8.0_31. They were created with the default version, which is 1.6.0_24.
public class Simple
{
public Simple()
{
}
public static String getValue()
{
return "blubber";
}
public int getInt32Value()
{
return 123456;
}
public double getDoubleVaue()
{
return 123.123;
}
public static void main(String[] args)
{
System.out.println(Simple.getValue());
}
}
The error is the following. :D
---------- Deploy: Deploy of project p_genapp_ejbclientproxy (15:35:18)
Retrieving PowerBuilder Proxies from EJB...
Generation Errors: Error: class not found: (
Deployment Error: No files returned for package/component 'Simple'. Error code: Unknown. Proxy was not created.
Done.
---------- Finished Deploy of project p_genapp_ejbclientproxy (15:35:19)
So the whole way isn't a option because we do not want to change the JAVA settings in PB back and forth just to generate new EJB Proxies for changed JAVA objects in the future...
So one option to test will be creating COM wrappers for JAVA classes to use them in PB...
Is there a possibility to ask at runtime if a Windows Store app (compiled for ARM and x86/64) is executed currently on an ARM-device or more specific on a Microsoft Surface Tablet from within c# or is it necessary to compile two Versions of the same app to behave different on different plattforms?
This can be done via the following code (according to this SO post):-
[DllImport("kernel32.dll")]
internal static extern void GetNativeSystemInfo(ref SystemInfo lpSystemInfo);
internal static bool IsArmBased()
{
var sysInfo = new SystemInfo();
GetNativeSystemInfo(ref sysInfo);
return sysInfo.wProcessorArchitecture == ProcessorArchitectureArm; //ushort 5
}
This does pass the WACK test, test I wouldn't count on it being around forever. Think very hard about why you need this information (is it just for stats, or are you changing the behaviour of your app, if so why!?)
using Windows.ApplicationModel;
Package package = Package.Current;
PackageId packageId = package.Id;
String arch = String.Format("{0}", packageId.Architecture);
This will return "X86" or "ARM", depending on the underlying hardware.
On the end of a Scenario, I want to take a picture if it has failed. The following code does not work:
[AfterScenario]
public void AfterScenario()
{
if(ScenarioContext.Current.TestError != null)
{
WebBrowser.Driver.CaptureScreenShot(ScenarioContext.Current.ScenarioInfo.Title);
}
}
I think this may be due to the fact that I start my browser using Coypu (which has selenium wrapped). The driver does not have a 'captureScreenShot' method implemented. So my question is: how can i take a screenshot after a scenario, when i start up my browser using coypu?
The code for starting the browser is the following:
sessionConfiguration.Driver = typeof (SeleniumWebDriver);
sessionConfiguration.Browser = Drivers.Browser.Firefox;
As you say, this is not implemented in Coypu right now. Reason being I have simply never needed to take a screenshot since so far, and no one's asked till now.
To access the native driver (WebDriver in your case) use BrowserSession.Native then you can use WebDriver's GetScreenshot method. This would end up looking something like this (disclaimer: not tested):
var driver = (ITakesScreenshot) coypuBrowserSession.Native;
var screenshot = driver.GetScreenshot();
screenshot.SaveAsFile("c://screenshot.png", System.Drawing.Imaging.ImageFormat.Png);
I've opened an issue for you on github to have this added to Coypu's BrowserWindow API
This is now natively available in Coypu. You can find the documentation here:
https://github.com/featurist/coypu#screenshots