hadoop-read-hack

This project contains two subprojects, one is the root subproject, the other one is testapp.

This project suppose to do a POC for monitor the hadoop FSDataInputStream.read method, and do something before invoke the real method.

How to Build

mvn clean package
cd testapp
mvn clean package

How to use

java -javaagent:./target/hadoop-read-hack-1.0.0.jar  -jar testapp/target/testapp-1.0.0.jar ./pom.xml 
Calling FSDataInputStream.read
enter buffer: 0
<project x
Hello World!