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I have a theoretic question about java Agents. It's posible do a java or openJDK instruction to add a java agent before execute java?

The normally execution of javaagent (i discard runtime execution) is:

java -jar -javaagent myJavaAgent myProgram.jar

But my idea is create a docker container with OpenJDK version and my agent load

PersonalJDK

FROM openjdk:7 RUN java LOAD AGENT // I DONT KNOW THIS INSTRUCTION

the customer use my container with my agent load

FROM personalJDK:7 COPY . /usr/src/myapp WORKDIR /usr/src/myapp RUN javac Main.java CMD ["java", "Main"]
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Searching solutions i come with this:

https://docs.oracle.com/javase/8/docs/technotes/guides/troubleshoot/envvars002.html

The answer is using _JAVA_OPTIONS, you must include a enviroment variables includes java agent.

PersonalJDK

FROM openjdk:7 COPY . /agent RUN _JAVA_OPTIONS=-javaagent:/agent/myagent.jar

the customer use my container with my agent load

FROM PersonalJDK COPY . /usr/src/myapp WORKDIR /usr/src/myapp RUN javac Main.java CMD ["java", -jar, "Main.jar"]
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3 Comments

That’s nonsense. You can specify the command line option without an environmental variable, to the same result, java -javaagent:/path/myagent.jar -jar myprogram.jar. You can use that instead of the distorted command line posted in your question. It’s not clear which actual problem this Q&A is supposed to solve.
But don't worry i reedited my anwser, for people that can't follow my flow
You should have edited the question instead, so that “people that can't follow your flow” have a chance to understand what actual problem you are trying to solve.

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