34 lines
1.1 KiB
Markdown
34 lines
1.1 KiB
Markdown
Experiment with java22 and Rust to monitor exceptions in a JVM
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* It's a mini APM that leverages the java22 ClassFile API and java22 Foreign Function Interface.
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* It's a java agent that instruments all `throw` opcodes in your bytecode with a call to a logger written in Rust.
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Work in Progress. Proof of concept works, but needs optimization. Try this at home, not at work :)
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Running:
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* Update the path to the rust lib (temp fix) in ExceptionLogger for your setup
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* mvn clean install `#maven also takes care of cargo`
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* create a minimal class in a separate project
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```java
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public class Main {
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public static void main(String[] args) throws Throwable {
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throw new Throwable();
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}
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}
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```
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Requirements
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* java22
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* rust
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Start rest service
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``` bash
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cd api; RUST_LOG=info cargo run
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```
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Start your java with
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```
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java22 -javaagent:$EXCEPTIONAL_PROJECT/exceptional/agent/target/exceptional-agent-1.0-SNAPSHOT.jar
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-Dagentlib="$EXCEPTIONAL_PROJECT/rustlib/target/release/librustlib.dylib"
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--enable-preview --enable-native-access=ALL-UNNAMED
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-classpath $YOUR_CLASSPATH YourMain
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```
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