Hi folks

I'm trying to build a utility library to include into JForex strategies.

I have the apache.commons example from the Wiki working as expected:

https://www.dukascopy.com/wiki/en/development/strategy-api/practices/include-libraries.

But I can't include my own lib.

I've compiled a jar containing a single test class, with the package com.uviva.

The jar is named uviva.jar and is placed in the IContext.getFilesDir() directory.

In the strategy file I have:

import com.uviva.*;

@Library("uviva.jar")
public class MyStrategy implements IStrategy, IFeedListener {
     .....
}

The import line is showing the error: "The import ... cannot be resolved".

I've also tried:

import com.uviva;
import uviva;
import com.uviva.MyTestClass;
import uviva.MyTestClass;

Seems that I'm misunderstanding something basic. Any suggestions would be very welcome!

You can try with the @RequiresFullAccess and full path:
example:

@RequiresFullAccess
@Library("E:\\JavaProjects\\ . . . \\MyCool.jar;)

avoid spaces

Thanks for the suggestion but it didn't work.

It's finding the file OK - the error lights up in the editor when I put in the correct path, but not if I put in the wrong path.

So it's something about the jar file it doesn't like.

I created the jar the usual way using the standard Oracle compiler. And there's nothing exotic in it - just a simple class.

So what can it be about the jar file that's causing JForex to barf? I'm at a bit of a loss...

See the attached strategy and jar.
Please note that @Library path must be updated accordingly

Hi

Thanks for getting back so quickly! But I'm still stuck .

As I say, the starting point is that I have the code in the Wiki example working properly with the commons-lang3 jar file out of the .../Strategies/file directory. So its not a basic file permissions issue or anything like that.

When I try your example com.dukascopy.App jar in my Documents directory (adding @RequiresFullAccess) it finds the file OK but gives the error "Unable to load target class" on compile. Same result if the jar is in the .../Strategies/file directory.

As I said above, with my own jar in the .../Strategies/files directory, I get the error "The import com.uviva.JustTesting cannot be resolved", trying with "import com.uviva.*" and "import com.uviva.JustTesting". As I said, the error only shows in the editor when I put the correct path in the @Libraries annotation, so it's something to do with the jar file itself, and not an issue with locating the jar.

I've enclosed my com.uviva jar - there is a method com.uviva.JustTesting.getString() which returns "Success!".

I really would love to solve this - I'm using the Historical Tester so need to get some of my SDK code working inside JForex as cleanly as possible.

PS - to be sure that it's not the IDE doing something automagical in the background, I just compiled a single class jar with the command:

c:\Program Files\Java\jdk1.8.0_121\bin\jar.exe" cvf util.jar JustTesting.class

Still not working

There was a problem with uviva.jar.
JustTesting must be put in directory inside of the jar. The directory must be equal to class package: com/uviva/JustTesting.class

Made it!

I suspect you were right and I wasn't building the jar in a way that preserved the directory structure. I'd tried using the command line and a bare-bones IDE, but googling for info on how to do it is confusing.

So this time I set up a project in IntelliJ IDEA and used their artifact feature, and it worked!

Thanks for sticking with me on this - much appreciated.