Develop Reference

JCEF initialization issue on MacOS

My Java app which uses JCEF, works perfectly fine in Windows Operating System. But when I try to run this sample application on MacOS Mojave, then it's facing initialization issues. I have added the desired jars and JCEF MacOS libraries/binaries into my project, also added JVM parameter to startup configuration as:
-Djava.library.path=*/jcef/jcef_build/native/Release,
but at the time of running application im facing the folowing error:
Exception in thread "main" java.lang.UnsatisfiedLinkError: /jcef_build/native/Release/libjcef.dylib: dlopen(*/jcef_build/native/Release/libjcef.dylib, 1): Library not loaded: #rpath/Frameworks/Chromium Embedded Framework.framework/Chromium Embedded Framework
Referenced from: */jcef_build/native/Release/libjcef.dylib
Reason: image not found
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1941)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1857)
at java.lang.Runtime.loadLibrary0(Runtime.java:870)
at java.lang.System.loadLibrary(System.java:1122)
at org.cef.CefApp.<init>(CefApp.java:149)
at org.cef.CefApp.getInstance(CefApp.java:237)
at org.cef.CefApp.getInstance(CefApp.java:224)
at MainFrame.<init>(MainFrame.java:70)
at MainFrame.main(MainFrame.java:145)
Please any one suggest what I am missing in running this sample application.

MysqldResource isn't working with MacOS Catalina

Since upgrading my os to Mac Catalina,
I'm getting the following error when trying to run the following:
MysqldResource mysqldResource = new MysqldResource(uri); // Uri - temp db dir
mysqldResource.start("embedded-mysqld-thread-" + System.currentTimeMillis(), databaseOptions);
Looks like the source of the problem is with the dependency "mysql-connector-mxj-db-files" having binary files in 32bit format, while catalina stopped supporting it.
This is the error I'm getting:
Exception in thread "embedded-mysqld-thread-1574931580040" com.mysql.management.util.WrappedException: java.io.IOException: Cannot run program "/private/var/folders/l5/4ywgvbbj1kvgvrwxzp6dz82c0000gn/T/test_db_24166997810717/bin/mysqld": error=86, Bad CPU type in executable
at com.mysql.management.util.Exceptions.toRuntime(Exceptions.java:55)
at com.mysql.management.util.Exceptions$Block.exec(Exceptions.java:89)
at com.mysql.management.util.RuntimeI$Default.exec(RuntimeI.java:180)
at com.mysql.management.util.Shell$Default.run(Shell.java:140)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: Cannot run program "/private/var/folders/l5/4ywgvbbj1kvgvrwxzp6dz82c0000gn/T/test_db_24166997810717/bin/mysqld": error=86, Bad CPU type in executable
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
at java.lang.Runtime.exec(Runtime.java:620)
at com.mysql.management.util.RuntimeI$Default$1.inner(RuntimeI.java:177)
at com.mysql.management.util.Exceptions$Block.exec(Exceptions.java:86)
... 3 more
Caused by: java.io.IOException: error=86, Bad CPU type in executable
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:247)
at java.lang.ProcessImpl.start(ProcessImpl.java:134)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
... 6 more
Does anyone know of an alternative to mysql-connector-java or knows of a way to run the existing dependency on Mac OS Catalina?

For anyone who has the same issue on MacOS Catalina, you can follow the README.md in my repo (https://github.com/pengyue/mysql-connector-mxj-mac-os-catalina), which has the 64 bits executables for MacOS Catalina, and this improved connector works on Catalina.
To explain what I have done:
Download the 64 bits executables from MySQL to the folder 5-5-9
Add the platform mapping for 64 bits MacOS in platform-map.properties
Create a jar by using jar cvf mysql-connector-mxj-db-files-5.0.12.jar .
Replace the jar in your mvn settings folder ~/.m2/repository/mysql/mysql-connector-mxj-db-files/5.0.12/ with the jar you just created.
This solution works fine for my projects, Unfortunately I could not find a github for the mysql-connector-mxj, as it is deprecated and not maintainable anymore.
The other option is to use wix-embedded-mysql(https://github.com/wix/wix-embedded-mysql) instead of mysql-connector-mxj, but this probably requires some code changes in your projects.

PKCS#11 library not found on 64bit Windows

In my job I have a requirement to sign XML file with certfifcate from SmartCard. Everything works fine but on 32bit Windows 7 VM.
The problems occur when I try to use the same code on 64bit Windows 10. I get error that "PKCS#11 not found" and "no such algorithm".
I use xades4j package. I've tried probably all solutions found in the web i.e.
Used different .dll libraries (pkcs11.dll, opensc-spy.dll, CPPkiP.dll, esp2003csp11.dll) in both 32 and 64 bits versions.
Placed .dll in both System32 and SysWOW64 directories.
Updated drivers for my reader (IDBridge CT30).
Changed jre to 32bit.
Used solutions from PKCS11 Reference Guide (without xades4j) - it also worked only on 32 bit.
Nothing helps and always the same exceptions occur. If someone have any ideas what else I could do, I will be really thankful for tips.
Best regards.
Caused by: java.security.KeyStoreException: PKCS11 not found
at java.security.KeyStore.getInstance(Unknown Source)
at java.security.KeyStore$Builder$2$1.run(Unknown Source)
at java.security.KeyStore$Builder$2$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 7 more
Caused by: java.security.NoSuchAlgorithmException: no such algorithm: PKCS11 for provider SunPKCS11-SmartCard
at sun.security.jca.GetInstance.getService(Unknown Source)
at sun.security.jca.GetInstance.getInstance(Unknown Source)
at java.security.Security.getImpl(Unknown Source)
... 11 more

I found library which solved my problem. It's https://github.com/esig/dss. I used JavaSE11(jdk-11.0.2), pkcs11.dll placed in C:/Windows/System32 directory.
Before run application it is necessary to add VM argument -Djava.security.debug=sunpkcs11,pkcs11

Tess4J 4.0.0 java.lang.UnsatisfiedLinkError: The specified module could not be found

Downloading and using tessData-best for tesseract-ocr github repository improved my accuracy for english on Tess4j 3.8.4 significantly. But to use that trainedData for other languages i had to upgrade to Tess4J 4.0.0. But When I did that its giving me following error on this line
TessBaseAPI api = TessAPI1.TessBaseAPICreate();
Exception in thread "main" java.lang.UnsatisfiedLinkError: The specified module could not be found.
at com.sun.jna.Native.open(Native Method)
at com.sun.jna.Native.open(Native.java:1759)
at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:260)
at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:398)
at com.sun.jna.Native.register(Native.java:1396)
at com.sun.jna.Native.register(Native.java:1156)
at net.sourceforge.tess4j.TessAPI1.<clinit>(TessAPI1.java:41)
at OCR.confidenceWord(OCR.java:106)
at OCR.processImg(OCR.java:381)
at test.main(test.java:10)
I have 64-bit windows 8.1 running on my machine with 64-bit JVM. I have VC++ 2015 redistributable installed. I checked in dependency walker and no dll seems to be missing.By setting system property "jna.debug.load" to "true", I can see it properly looks for and gets "libtesseract400" at temp folder. Has anyone been able to solve this error?

Error when launching Java FX application on a headless Linux RedHat system

Trying to launch a java FX application on a Linux system using X. I get the following stack trace. After a bunch of googling and installing various packages, I am at a loss. Any thoughts?
java -jar tacoma_testing.jar
Prism-ES2 Error : GL_VERSION (major.minor) = 1.4
java.lang.reflect.InvocationTargetException
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.javafx.main.Main.launchApp(Main.java:698)
at com.javafx.main.Main.main(Main.java:871)
Caused by: java.lang.RuntimeException: java.lang.UnsatisfiedLinkError: /projects/tacoma/tacoma_regression_testing/jdk1.7.0_25/jre/lib/amd64/libglass.so: libgio-2.0.so.0: cannot open shared object file: No such file or directory
at com.sun.javafx.tk.quantum.QuantumToolkit.startup(QuantumToolkit.java:281)
at com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:124)
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:163)
at com.sun.javafx.application.LauncherImpl.access$000(LauncherImpl.java:47)
at com.sun.javafx.application.LauncherImpl$1.run(LauncherImpl.java:115)
at java.lang.Thread.run(Thread.java:724)
Caused by: java.lang.UnsatisfiedLinkError: /projects/tacoma/tacoma_regression_testing/jdk1.7.0_25/jre/lib/amd64/libglass.so: libgio-2.0.so.0: cannot open shared object file: No such file or directory
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1957)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1882)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1843)
at java.lang.Runtime.load0(Runtime.java:795)
at java.lang.System.load(System.java:1061)
at com.sun.glass.utils.NativeLibLoader.loadLibraryFullPath(NativeLibLoader.java:200)
at com.sun.glass.utils.NativeLibLoader.loadLibraryInternal(NativeLibLoader.java:88)
at com.sun.glass.utils.NativeLibLoader.loadLibrary(NativeLibLoader.java:31)
at com.sun.glass.ui.Application.loadNativeLibrary(Application.java:73)
at com.sun.glass.ui.Application.loadNativeLibrary(Application.java:80)
at com.sun.glass.ui.gtk.GtkPlatformFactory$1.run(GtkPlatformFactory.java:28)
at com.sun.glass.ui.gtk.GtkPlatformFactory$1.run(GtkPlatformFactory.java:25)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.glass.ui.gtk.GtkPlatformFactory.<clinit>(GtkPlatformFactory.java:25)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:190)
at com.sun.glass.ui.PlatformFactory.getPlatformFactory(PlatformFactory.java:20)
at com.sun.glass.ui.Application.Run(Application.java:103)
at com.sun.javafx.tk.quantum.QuantumToolkit.startup(QuantumToolkit.java:271)
... 5 more

Redhat is not listed as as supported configuration for JavaFX 2.2.
Nor is running JavaFX in a headless mode.
This may change for Java 8, but Java 8 has not been released yet, so the list of supported configurations for JavaFX running on Java 8 has not been published.
Currently the supported configuration set for Linux is only => Ubuntu 10.4+ gtk2 2.18+ with optional additional requirements for av codecs if you also want media playback support.
So try using a supported Ubuntu system instead of Redhat and you may or may not get that working in a headless environment.
I tested and it works fine with Redhat 6. Redhat 5 seems to be the problem.
Redhat Enterprise Linux 6 support will be added for Java 8 (to be released in the next few weeks).
A RHEL 5.5 support request was closed as won't fix, see RT-22564 "JavaFX Support for Red Hat Enterprise Linux 5.5".
If you can find a way to install gtk2 2.18+ on RHEL 5 you may be able to get it to work, though no promises.