Hi,

I managed to get an indicator, that is using an external jar file, to compile. But when I try to add it to the currently active chart I get the following stack trace:

java.lang.NoClassDefFoundError: Could not initialize class com.domain.tiny
at com.dukascopy.indicators.EMAProbeEnvelopesIndicator.setInputParameter(EMAProbeEnvelopesIndicator.java:114)
at com.dukascopy.charts.math.a.a.a(Unknown Source)
at com.dukascopy.charts.math.dataprovider.AbstractDataProvider$e.c(Unknown Source)
at com.dukascopy.charts.math.dataprovider.AbstractDataProvider$e.run(Unknown Source)

I used the source code of one of your indicators and added the following few lines of code to it:

import com.dukascopy.api.RequiresFullAccess;
import com.dukascopy.api.Library;
import com.domain.tiny;
@Library("com.domain.tiny-0.1.0-SNAPSHOT-standalone.jar")

and modified one method this way:

public void setInputParameter(int index, Object array) {
inputs[index] = (double[]) array;
System.out.println("(binomial 5 3): " + tiny.binomial(5, 3));
System.out.println("(binomial 10042, 111): " + tiny.binomial(10042, 111));
}


i.e. minimally, just to test if the code works with external jars.
The jar file/java class com.domain.tiny works if I use it as a library from a simple standalone java program outside of the JForex platform.

Can you advise what might go wrong here?
thanks!

Could you please provide a full example indicator and the library file which replicate this?

Hi,

The jar file seems to be too large, the dukascopy website does not allow me to upload it. Here is a link where you can download it: https://tempsend.com/025AF8F93B This link will expire in a few days from now.

I have attached the modified strategy file (EMAProbeEnvelopesIndicator.java), and the simple java program (Hello.java) with which the above linked jar file works. I used this command to compile Hello.java (with both the java and the jar file in the current working directory):

javac -cp '.:com.domain.tiny-0.1.0-SNAPSHOT-standalone.jar' Hello.java

Once compiled, the following java command runs the jar file with Hello.java:

java -cp '.:com.domain.tiny-0.1.0-SNAPSHOT-standalone.jar' Hello

The bug is yet to be fixed. Please refer to:
viewtopic.php?t=50778

Thanks. I hope you find the bug quickly.

Maybe it is worth pointing out that I can replicate the same strange behaviour with the supplied plugin code example in JForex-SDK/src/jforex/plugin/ordertable/...

I.e. if I modify the code in OrderTablePlugin.java (add a simple external jar) and use the order-table-plugin assembly, compile and attach it to the platform then the plugin starts and then instantly and unexpectedly stops. When I use the order-table-sdk assembly with unchanged code, and build a platform-independent app, everything works.

For plugins - you need to build the jar yourself, thus include as well the dependencies in your plugin jar file. You can do this by adding the dependencies in the maven assembly, see jar-assembly-summarizer-plugin.xml and the profile summarizer-plugin in the pom.xml.

Yes. I clearly went through the right steps of plugin compilation as I got the original unchanged plugin code to work in the JForex platform.

Will this bug be fixed in JForex4 (or in the current stable release)?

thanks

Both of them.

Any indication of by when the bug is going to be fixed would be most welcome.
(I am thinking of rather vague statements, like "probably within the next two months", or "by the JForex4 comes out of beta testing", etc..).

This would help me decide whether I should keep using the SDK or switch to the JForex platform (the latter would be a lot less work).

The issue is fixed on the JForex DEMO. Please check.