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https://github.com/apache/zeppelin
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18 lines
866 B
Markdown
18 lines
866 B
Markdown
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# Overview
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Java interpreter for Apache Zeppelin
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# Architecture
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Current interpreter implementation supports the static REPL. It compiles the code in memory, execute it and redirect the output to Zeppelin.
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### Technical overview
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* Upon starting an interpreter, an instance of `JavaCompiler` is created.
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* When the user runs commands with java, the `JavaParser` go through the code to get a class that contains the main method.
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* Then it replaces the class name with random class name to avoid overriding while compilation. It creates new out & err stream to get the data in new stream instead of the console, to redirect output to Zeppelin.
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* If there is any error during compilation, it can catch and redirect to Zeppelin.
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* `JavaInterpreterUtils` contains useful methods to print out Java collections and leverage Zeppelin's built in visualization.
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