如何使用Boot Gradle插件在Spring Boot应用程序中嵌入JavaAgent

Question

I am using a javaagent for my spring boot app and currently I am running it via

java -javaagent:agent.jar -jar app.jar

My project is a gradle project and I want to embed the agent.jar inside the app.jar so that I can run it as

java -javaagent:app.jar -jar app.jar

It can be done via boot maven plugin as mentioned here - https://jeroendruwe.be/spring-boot-and-new-relic/ but there is no alternative for boot gradle plugin. The closest I find is this - https://jdpgrailsdev.github.io/blog/2014/04/08/spring_boot_gradle_newrelic.html , but it does not embed the jar as intended.

Is there anyway it can be done via gradle?

Answer 1

Can be add as dependency jar from local directory. 'libs' is directory inside your project.

dependencies { compile fileTree(dir: 'libs', include: '*.jar') }

Answer 2

gradle jar :

jar {
manifest{
    attributes "Agent-Class" : "com.......agent.AgentTest"
    //attributes "Premain-Class" : "com.......agent.AgentTest"
        }
    }

Althought, I am using to do like this :

    public static void main(String[] args) throws Exception {
    String pid = "6236";
    String agentPath = "...";
    VirtualMachine virtualMachine = com.sun.tools.attach.VirtualMachine.attach(pid);
    virtualmachine.loadAgent("/home/aaa/Code/agent-1.0-SNAPSHOT.jar");
    virtualMachine.detach();
}

Answer 3

Did you try

java -Xbootclasspath=('your path'/app.jar or 'your path to libs'/agent.jar) -javaagent:'your path'/app.jar -jar 'your path'/app.jar

?

Another approach: use jar as dependency and move (or create another one) your premain class in Spring Boot application jar.