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This is the third part of the JVM Inside Out series. For your convenience you can find other parts in the table of contents in Part 1 — Getting object address Erasure in Java seems pretty easy but sometimes it has unexpected consequences. One of them is erasure of whole class content, not only the … Continue reading JVM Inside Out Part 3 — Java raw type trickery
This is the second part of the JVM Inside Out series. For your convenience you can find other parts in the table of contents in Part 1 — Getting object address Last time we saw how to read object address. We can use similar trick to read object contents as integers. Let’s see this: First, … Continue reading JVM Inside Out Part 2 — Reading object content
This is the first part of the JVM Inside Out series. For your convenience you can find other parts using the links below: Part 1 — Getting object address Part 2 — Reading object content Part 3 — Java raw type trickery Part 4 — Locks and out of band exceptions How to get object … Continue reading JVM Inside Out Part 1 — Getting object address
Imagine that you need to load JAR file dynamically in Zeppelin working on your EMR cluster. One easy way is to deploy the file to the instance and load it from there, however, what can you do if you have almost no access to the cluster and the filesystem? You can load the JAR from … Continue reading Dynamically loading JAR file in Zeppelin
If you want to declare a class in Zeppelin and create instance of it, you might be surprised: What happened? Whatever you declare in Zeppelin notebook is a part of some internal class so the newly declared class K doesn’t have parameterless constructor because it expects the instance of enclosing type. There are two simple … Continue reading Generating class in Zeppelin