Loading native library with Spring Boot

Smajl :

I have a simple Spring Boot project which loads native libraries. The problem is that I have no idea how to specify the path to the native library when running the application.

I have read tons of posts explaining how to set java.library.path but every single one leads to

java.lang.UnsatisfiedLinkError: /path/to/lib/libconnector.so: libconnector.so: cannot open shared object file: No such file or directory

The project works if I run these two commands in a sequence from command line:

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/path/to/lib
./gradlew bootRun

The library is loaded and works. But I am unable to specify the library path in my gradle file. I tried

run {
    systemProperty 'java.library.path', file('/path/to/lib')
}

bootRun {
    systemProperty 'java.library.path', file('/path/to/lib')
}

and all sorts of variations of this. Also tried adding VM arguments to my IDE etc. but nothing works. Could someone explain what am I doing wrong?

This is how I load the native library (located in $projectRoot/lib):

static {
        // load connector library
        File lib = new File("lib/" + System.mapLibraryName("connector"));
        System.load(lib.getAbsolutePath());
}

Smajl :

I finally solved my problem. I should be passing LD_LIBRARY_PATH as an environment variable instead of java.library.path as system property when running the application.

The following Gradle modification solved my issue:

tasks.withType(JavaExec) {
    environment('LD_LIBRARY_PATH', 'lib')
}