bindableService issue with grpc-java

Question

I am trying to use grpc-java v1.1.2 (build.gradle section below) but when I try to run the fat jar for the sample application, its throwing the exception given below. I do not s

Answer 1

The issue for me was, jar did not contain the dependent lib classes. I had to make this change to resolve it :

jar {
    ...
    from {
        configurations.compile.collect { it.isDirectory() ? it : zipTree(it) }
    }
}

Which is just another way to create fat jar :)

Answer 2

I fixed the issue by using the shadow plugin for creating fat jars.

    buildscript {
        repositories {
            mavenCentral()
            mavenLocal()
        }
        dependencies {
            classpath "net.ltgt.gradle:gradle-errorprone-plugin:0.0.9"
            classpath 'com.github.jengelman.gradle.plugins:shadow:1.2.4'
            classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.0'
        }
    }

    plugins {
        id 'java'
        id 'application'
        id 'idea'
        id 'com.github.johnrengelman.shadow' version '1.2.4'
        id "net.ltgt.errorprone" version '0.0.9'
    }


    shadowJar {
        baseName = 'shadow'
        classifier = null
        version = null
    }

jar {
    manifest {
        attributes(
                'Class-Path': configurations.runtime.files.collect {"$it.name"}.join(' '),
                'Main-Class': 'com.abc.test'
        )
    }
}

Run the following:

gradle shadowJar

the shadowJar file gets created in the build/libs directory which can be run as:

java -jar shadowJar