Problem: JNI binding for zactor not generated

[lsgro]

luigi@aczglug01:~/src/czmq$ gsl -target:java project.xml
GSL/4.1c Copyright (c) 1996-2016 iMatix Corporation
gsl/4 I: Processing project.xml...
gsl/4 M: Building Java JNI binding (java)

luigi@aczglug01:~/src/czmq$ find bindings/jni/src/main -name \*.java
bindings/jni/src/main/java/org/zeromq/czmq/Zdigest.java
bindings/jni/src/main/java/org/zeromq/czmq/Zdir.java
bindings/jni/src/main/java/org/zeromq/czmq/ZdirPatch.java
bindings/jni/src/main/java/org/zeromq/czmq/Zchunk.java
bindings/jni/src/main/java/org/zeromq/czmq/Zlist.java
bindings/jni/src/main/java/org/zeromq/czmq/Ztrie.java
bindings/jni/src/main/java/org/zeromq/czmq/Zuuid.java
bindings/jni/src/main/java/org/zeromq/czmq/Zconfig.java
bindings/jni/src/main/java/org/zeromq/czmq/Zframe.java
bindings/jni/src/main/java/org/zeromq/czmq/Zproc.java
bindings/jni/src/main/java/org/zeromq/czmq/Zhashx.java
bindings/jni/src/main/java/org/zeromq/czmq/Zlistx.java
bindings/jni/src/main/java/org/zeromq/czmq/Zfile.java
bindings/jni/src/main/java/org/zeromq/czmq/Zstr.java
bindings/jni/src/main/java/org/zeromq/czmq/Zhash.java
bindings/jni/src/main/java/org/zeromq/czmq/Zmsg.java
bindings/jni/src/main/java/org/zeromq/czmq/Zsock.java
bindings/jni/src/main/java/org/zeromq/czmq/Zcertstore.java
bindings/jni/src/main/java/org/zeromq/czmq/Zclock.java
bindings/jni/src/main/java/org/zeromq/czmq/Zpoller.java
bindings/jni/src/main/java/org/zeromq/czmq/Ztimerset.java
bindings/jni/src/main/java/org/zeromq/czmq/Ziflist.java
bindings/jni/src/main/java/org/zeromq/czmq/Zarmour.java
bindings/jni/src/main/java/org/zeromq/czmq/Zcert.java
bindings/jni/src/main/java/org/zeromq/czmq/Zloop.java

This is preventing from compiling the JNI bindings for malamute, since they refer to the Zactor class:

luigi@aczglug01:~/src/malamute/bindings/jni$ gradle build
:compileJava
warning: [options] bootstrap class path not set in conjunction with -source 1.7
/home/luigi/src/malamute/bindings/jni/src/main/java/org/zeromq/mlm/MlmClient.java:46: error: cannot find symbol
    public Zactor actor () {
           ^
  symbol:   class Zactor
  location: class MlmClient
/home/luigi/src/malamute/bindings/jni/src/main/java/org/zeromq/mlm/MlmClient.java:47: error: cannot find symbol
        return new Zactor (__actor (self));
                   ^
  symbol:   class Zactor
  location: class MlmClient
2 errors
1 warning
:compileJava FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':compileJava'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 2.982 secs

[bluca]

The problem is that the JNI binding generator can't handle with callbacks as parameters:

https://github.com/zeromq/zproject/blob/master/zproject_java_lib.gsl#L156

        if resolve_container (argument) = 1
            my.method.okay = 0
            #echo "Skipping $(class.name).$(my.method.name) - can't deal with argument type $(argument.type)"

So the class is skipped given the constructor can't be generated.

@sappo @asokoloski any idea how to fix this?

[sappo]

@bluca This requires somebody with deep JNI knowledge. I sadly don't have a clue how to fix it nor have the time to investigate it.

[bluca]

Ok, thanks. Given it's a zproject problem I've opened an issue there: zeromq/zproject#776
And I'll close this one as we can't fix it in CZMQ