Thanks a lot for this contribution! I will give it a try soon.
Doru On Tue, Mar 25, 2014 at 7:59 PM, Joachim Geidel < joachim.gei...@onlinehome.de> wrote: > Hi everybody, > > JNIPort for Pharo 3.0 alpha is now available at SmalltalkHub. > > JNIPort is a Smalltalk library which allows Java code to be invoked from > Smalltalk. It acts as a bridge between the world of Smalltalk objects and a > Java Virtual Machine (JVM) where Java code is executing. > > When I first ported JNIPort to Squeak and Pharo 1.x, I used Alien as the > FFI > library. As NativeBoost has superseded Alien, the interface to the Java > Native Interface library had to be rewritten. There are still some > undocumented and obscure parts in NativeBoost, so this has taken some time. > > If you want to try it, load it via the ConfigurationOfJNIPort. I hope this > works. If it does not, load the packages individually in the order in which > they appear in the ConfigurationOfJNIPort. > http://www.smalltalkhub.com/#!/~JNIPort/JNIPort > The next step is to read the documentation at > http://jniport.wikispaces.com/ > Otherwise, you won't know what to do next. ;-) > Download the extra files from the download page at Wikispaces, you will > need > two jar files from there. > > Start a Java VM attached to Pharo by adapting and executing the following > code snippet: > > ---- > | jvmSettings | > "You can set the path to the Java VM library by editing the path as > needed." > JNIPortJNIInterface libraryFile: > > '/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Libraries/libclient.dylib' > . > "JNIPortJNIInterface libraryFile: > 'C:\Programme\Java\jre7\bin\client\jvm.dll' ." > > jvmSettings := JVMSettings new. > jvmSettings usesGhosts: true. > jvmSettings supportsCallbacks: true. > jvmSettings jniPortSettings useJNIHelperLibrary: false. > jvmSettings ghostClassSettings retainMethodSource: true. > > "On Mac OS X and Linux, class path entries are separated by colons." > "On Windows, you have to use semicolons instead. Edit the following line > as > needed." > jvmSettings runtimeSettings classpath: > '.:/Users/myname/JNIPort.jar:/Users/myname/JNIPort-Tests.jar'. > " jvmSettings runtimeSettings classpath: > '.;.\JNIPort.jar;.\JNIPort-Tests.jar'." > > "Uncomment the following if you want the Java VM to emit verbose messages. > How to access these messages depends on your platform. > On Mac OS X, they are visible in the Console application." > "jvmSettings runtimeSettings addOption: '-verbose:jni'; addOption: > '-verbose:gc'; addOption: '-verbose:class'." > Cursor execute showWhile: [JVM newWithSettings: jvmSettings]. > ---- > > Then the fun starts: > > ---- > | zfClass zipfile entries | > zfClass := JVM current findClass: #'java.util.zip.ZipFile'. > zipfile := zfClass new_String: 'JNIPort.jar'. > zipfile size. "--> answers an Integer" > entries := zipfile entries. > entries asAnEnumeration do: [:each | Transcript cr; print: each]. > ---- > > And now to the ugly little secret reason why I call it an alpha version: > > While everything seems to work, it is *much* slower than it used to be in > Pharo 1.2 with Alien. And when I compare it with VisualWorks, I wonder if > the Pharo version secretly does some additional work for SETI: > - Starting the JVM: > VisualWorks 0.7 seconds > Pharo 7 to 8 seconds > - A benchmark using some methods of java.io.BufferedReader and > java.util.StringTokenizer: > VisualWorks 114 milliseconds > Pharo 12 to 13 seconds > > I have not yet found the reason. The TimeProfiler is not very helpful, as > its 1 millisecond resolution is too coarse. It would be nice if it had > microsecond resolution. From the TimeProfiler results, it seems that > calling > a JNI method with NativeBoost is extremely slow, but I don't trust those > profiles too much. > > So, give it a try, and if you find something useful concerning the bad > performance, please send me a message. > > Best regards, > Joachim Geidel > > > > > -- > View this message in context: > http://forum.world.st/ANN-JNIPort-for-Pharo-3-0-alpha-tp4750750.html > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > > -- www.tudorgirba.com "Every thing has its own flow"
