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| closing external JAR/DLL resources properly |
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Tipota
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| Post subject: closing external JAR/DLL resources properly |
Post rating: 0
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Posted: Mon 19 Dec, 2011, 22:29
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User rating: 0
Joined: Mon 19 Dec, 2011, 21:54
Posts: 8
Location: Czech Republic, Prague
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Dear Support,
I am accessing external JAR file from my strategy via @Library(..) annotation. The JAR itself however reference some other DLL files.
When I run my strategy for the first time, everything works fine. After I stop it, and when I try to run it 2nd time I got error
library XXX already loaded by another classloader
Although I am trying to run finalyse(); and System.gc(); during the onStop it seems there are still some opened references pending.
For obvoius reasons, I don't want to restart JForex client each time I stop my strategy. Could you please advise how to resolve this problem?
Thank you very much in advance.
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API Support
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| Post subject: Re: closing external JAR/DLL resources properly |
Post rating: 0
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Posted: Tue 20 Dec, 2011, 10:32
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User rating: ∞
Joined: Fri 31 Aug, 2007, 09:17
Posts: 6139
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What libraries are you using?
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Tipota
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| Post subject: Re: closing external JAR/DLL resources properly |
Post rating: 0
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Posted: Tue 20 Dec, 2011, 13:29
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User rating: 0
Joined: Mon 19 Dec, 2011, 21:54
Posts: 8
Location: Czech Republic, Prague
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I am using MATLAB analytical libraries.
This issue appear only in the context of JForex platform.
When I call same functions repeatedly from Eclipse environment, it works without any problems.
Hereby is the full error message:
SEVERE connect.JForexTaskManager ] Native Library XXX.dll already loaded in another classloader
java.lang.UnsatisfiedLinkError: Native Library XXX.dll already loaded in another classloader
at java.lang.ClassLoader.loadLibrary0(Unknown Source)
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
at java.lang.System.loadLibrary(Unknown Source)
at com.fincad.ShowAll.<clinit>(ShowAll.java:1981)
at jforex.Pokus.onStart(Pokus.java:40)
at com.dukascopy.api.impl.execution.s.call(Unknown Source)
at com.dukascopy.api.impl.connect.an.a(Unknown Source)
at com.dukascopy.api.impl.connect.v.call(Unknown Source)
at com.dukascopy.api.impl.connect.v.call(Unknown Source)
at com.dukascopy.api.impl.execution.i.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at com.dukascopy.api.impl.execution.e$a.f(Unknown Source)
at com.dukascopy.api.impl.execution.e$a.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
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API Support
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| Post subject: Re: closing external JAR/DLL resources properly |
Post rating: 0
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Posted: Tue 27 Dec, 2011, 09:40
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User rating: ∞
Joined: Fri 31 Aug, 2007, 09:17
Posts: 6139
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@Library annotation only supports java libraries (i.e. jar files).
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kreukle
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| Post subject: Re: closing external JAR/DLL resources properly |
Post rating: 0
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Posted: Wed 22 Feb, 2012, 21:44
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User rating: 0
Joined: Fri 17 Feb, 2012, 22:14
Posts: 7
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Did you manage to connect matlab and jforex?
i used to try 3 ways and every failed with errors
first is like yours with matlab jar.
second with jni wrapped dll
and third with matlabcontrol library connecting matlab threw java rmi
Every works on standalone java appl, but fails in jforex.
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