Cloud Glossary: Letter J

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J

JavaScript

A dynamic programming language commonly used for web development, serverless functions, and full-stack applications.

JAR (Java Archive)

A package file format used to aggregate Java class files and associated metadata into a single file for distribution.

Jenkins

An open-source automation server used for continuous integration and continuous deployment (CI/CD) pipelines.

JIT (Just-In-Time)

A compilation technique where code is compiled during execution rather than beforehand, often used for performance optimization.

Job

A unit of work or task that is executed by a system, often as part of batch processing or workflow automation.

Job Queue

A data structure that holds jobs waiting to be processed, typically implementing first-in-first-out (FIFO) ordering.

Join

An operation that combines data from multiple sources or tables based on related columns or keys.

JSON (JavaScript Object Notation)

A lightweight, text-based data interchange format that is easy for humans to read and write.

JSON Schema

A vocabulary that allows annotation and validation of JSON documents, defining the structure and constraints.

Jump Host

A secure server that acts as an intermediary for accessing other servers in a private network or security zone.

JVM (Java Virtual Machine)

A runtime environment that executes Java bytecode and provides platform independence for Java applications.

Jitter

Variation in network latency or timing that can affect the quality of real-time communications and applications.

JMX (Java Management Extensions)

A Java technology that provides tools for managing and monitoring applications, devices, and service-oriented networks.

Journal

A record of changes or transactions in a system, often used for recovery, auditing, or replication purposes.

JWT (JSON Web Token)

A compact, URL-safe means of representing claims to be transferred between parties for authentication and authorization.

JAMstack

A modern web development architecture based on JavaScript, APIs, and Markup for building fast, secure websites.

Jedis

A Java client library for Redis that provides a simple and intuitive interface for interacting with Redis servers.

JetStream

A distributed streaming platform built on top of NATS that provides persistent messaging and stream processing.

JFR (Java Flight Recorder)

A profiling and monitoring tool for Java applications that provides low-overhead data collection for performance analysis.

JPA (Java Persistence API)

A Java specification for managing relational data in Java applications using object-relational mapping.

JDBC (Java Database Connectivity)

A Java API that defines how a client may access a database, providing methods for querying and updating data.

JSON-LD

A method for encoding linked data using JSON, providing a way to add semantic meaning to JSON documents.

JUnit

A unit testing framework for Java programming language that is important for test-driven development.

JQ

A lightweight and flexible command-line JSON processor for filtering, mapping, and transforming JSON data.

JSR (Java Specification Request)

A formal document that describes proposed specifications and technologies to be added to the Java platform.

JConsole

A graphical monitoring tool to monitor Java Virtual Machine and Java applications both locally and remotely.

JGroups

A Java library for reliable group communication that can be used to create clusters where members can send messages.

JAX-RS

A Java API for creating RESTful web services, providing annotations to simplify the development of REST APIs.

JAXB (Java Architecture for XML Binding)

A Java technology that provides an easy way to bind XML schemas and Java representations.

JNDI (Java Naming and Directory Interface)

A Java API that provides naming and directory functionality for Java applications.

JBoss

An open-source Java EE-based application server that can be used to build and deploy enterprise Java applications.

JAR Hell

A problem that occurs when multiple JAR files on the classpath contain different versions of the same classes.

JIT Compilation

A compilation technique where bytecode is compiled to machine code at runtime for improved performance.

JSON Path

A query language for JSON, similar to XPath for XML, used to extract specific values from JSON documents.

Just Enough Administration (JEA)

A PowerShell security technology that enables delegated administration for anything managed by PowerShell.

JAXP (Java API for XML Processing)

A Java API that provides a common interface for processing XML documents using various XML processing libraries.

JSON Merge Patch

A format for describing changes to a JSON document, designed to be more efficient than JSON Patch for simple updates.

JSON-RPC

A remote procedure call protocol encoded in JSON, designed to be simple and lightweight for client-server communication.

Java Memory Model

The specification that defines how threads interact through memory and what behaviors are allowed in concurrent execution.

JCA (Java Connector Architecture)

A Java-based technology solution for connecting application servers and enterprise information systems.

JSONiq

A query and transformation language designed for JSON data, providing SQL-like capabilities for JSON documents.

Job Control Language (JCL)

A scripting language used on mainframe systems to instruct the Job Entry Subsystem on how to run a batch job.