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Apache Velocity first released in April 2001, is a Java-based template engine that provides a template language to reference objects defined in Java code. It aims to ensure clean separation between the presentation tier and business tiers in a Web application (the model–view–controller design pattern).
A simple example of a job stream is a system to print payroll checks which might consist of the following steps, performed on a batch of inputs: Read a file of data containing employee id numbers and hours worked for the current pay period (batch of input data).
Standard input is a stream from which a program reads its input data. The program requests data transfers by use of the read operation. Not all programs require stream input. For example, the dir and ls programs (which display file names contained in a directory) may take command-line arguments, but perform their operations without any stream ...
There have been multiple data-flow/stream processing languages of various forms (see Stream processing). Data-flow hardware (see Dataflow architecture) is an alternative to the classic von Neumann architecture. The most obvious example of data-flow programming is the subset known as reactive programming with spreadsheets. As a user enters new ...
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By way of illustration, the following code fragments demonstrate detection of patterns within event streams. The first is an example of processing a data stream using a continuous SQL query (a query that executes forever processing arriving data based on timestamps and window duration). This code fragment illustrates a JOIN of two data streams ...
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Template parameters [Edit template data]. This template prefers inline formatting of parameters. Parameter Description Type Status; Proficiency level: level: Use this to indicate roughly how good at Java you are, on a scale from 1-6. 1: beginner, N: master of the JVM, Duke himself cowers in fear!