[CAMEL-15569] Executable fat jar built with Gradle fails with exception

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Information Provided
• Affects Version/s: 3.5.0
• Component/s: camel-core

Environment

Java

openjdk version "1.8.0_265"
OpenJDK Runtime Environment (build 1.8.0_265-8u265-b01-0ubuntu2~18.04-b01)
OpenJDK 64-Bit Server VM (build 25.265-b01, mixed mode)

 

Gradle 6.5

• Estimated Complexity: Unknown
• External issue URL: https://stackoverflow.com/questions/64015236/apache-camel-timer-nullpointer-exception-at-fat-jar
• Assignee: Jan Bednar
• Reporter: Gonzalo Mendoza
• Created: 22/Sep/20 19:43
• Updated: 22/Sep/20 22:31
• Resolved: 22/Sep/20 22:25

Description

I'm trying to implement a timer using Camel 3.5 at Gradle project with OpenJDK8 as next

from("timer://watchexpiration?fixedRate=true&period=600000&delay=0")...

But, after build the fat jar using
1. Build with:

./gradlew build

2. Run with:

java -jar build/libs/app.jar

After that I receive the next error at console

Caused by: org.apache.camel.ResolveEndpointFailedException: Failed to resolve endpoint: timer://watchexpiration?delay=0&fixedRate=true&period=600000 due to: Error binding property (delay=0) with name: delay on bean: timer://watchexpiration?delay=0&fixedRate=true&period=600000 with value: 0
    at org.apache.camel.impl.engine.AbstractCamelContext.doGetEndpoint(AbstractCamelContext.java:888)
    at org.apache.camel.impl.engine.AbstractCamelContext.getEndpoint(AbstractCamelContext.java:777)
    at org.apache.camel.support.CamelContextHelper.getMandatoryEndpoint(CamelContextHelper.java:58)
    at org.apache.camel.reifier.AbstractReifier.resolveEndpoint(AbstractReifier.java:177)
    at org.apache.camel.reifier.RouteReifier.doCreateRoute(RouteReifier.java:250)
    at org.apache.camel.reifier.RouteReifier.createRoute(RouteReifier.java:112)

But If I run using

./gradlew run

then works fine as I expected. I don't want to use any frameworks for this project. I feel this is just a config issue or something is wrong with my configuration I guess.

How can I fix it?

build.gradle

 plugins {
    id 'java'
    id 'application'
    id 'com.github.sherter.google-java-format' version '0.8'
}

repositories {
    jcenter()
}

dependencies {
    implementation 'com.google.guava:guava:29.0-jre'
    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.6.2'
    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.6.2'
    // Camel
    compile group: 'org.apache.camel', name: 'camel-core', version: '3.5.0'
    compile group: 'org.apache.camel', name: 'camel-file', version: '3.5.0'
    compile group: 'org.apache.camel', name: 'camel-file-watch', version: '3.5.0'
    compile group: 'org.apache.camel', name: 'camel-xstream', version: '3.5.0'
    compile group: 'org.apache.camel', name: 'camel-gson', version: '3.5.0'
    compile group: 'org.apache.camel', name: 'camel-rest', version: '3.5.0'
    compile group: 'org.apache.camel', name: 'camel-servlet', version: '3.5.0'
    compile group: 'org.apache.camel', name: 'camel-http', version: '3.5.0'
    compile group: 'org.apache.camel', name: 'camel-jackson', version: '3.5.0'
    compile group: 'org.apache.camel', name: 'camel-quartz', version: '3.5.0'
    compile group: 'org.apache.camel', name: 'camel-timer', version: '3.5.0'

    compile group: 'org.slf4j', name: 'slf4j-simple', version: '1.7.30'
    compile group: 'org.slf4j', name: 'slf4j-api', version: '1.7.30'

    // Dev Libs
    compileOnly("org.projectlombok:lombok:1.18.12")
    annotationProcessor("org.projectlombok:lombok:1.18.12")

    compile group: 'org.apache.commons', name: 'commons-csv', version: '1.4'
}

application {
    mainClassName = 'com.eip.App'
}

configurations {
    // configuration that holds jars to include in the jar
    extraLibs
}

jar {
    manifest {
        attributes(
                'Main-Class': 'com.beam.agent.App'
        )
    }
    from {
        configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
    }
}

test {
    useJUnitPlatform()
}

googleJavaFormat {
    exclude '**/App.java'
}