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It’s interesting how functional programming in Java, Streams especially, have trained us out of some common patterns. Example: 1 2 3 4 List<Foo> foos =newArrayList<>(); for(inti=0; i < bars.size(); i++) { foos.add(newFoo(i, bars.get(i)); } The above code creates a newFoo...
For many years of Java development, I did not use or case about the Java finalizer. In recent months, it has become an issue that I’m seeing more people dealing with.Deprecating the Java finalizeris a good first step toward removing it from core APIs....
Next we use the DStreamforeachRDDmethod to apply processing to each RDD in this DStream. We parse the message values into CallDataRecord objects, with the map operation on the DStream, then we convert the RDD to a DataFrame, which allows you to useDataFrames and SQLoperations on streaming...
JRuby tries its best to keep Ruby conventions while allowing you to interface with Java code and libraries. However, in order for it to “find” the Java classes, you need to load their JARs much like you would a Gem or another Ruby source file. In order to get everything load...