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Apex Core (ASF)
Apex Core (Github Mirror)
Apex Malhar (ASF)
Apex Malhar (Github Mirror)
Writing Apache Apex Applications
Apache Apex Core Documentation
including overviews of the product, security, application development, operators and the commandline tool.
Apache Apex Malhar Documentation
for the operator library including a diagrammatic taxonomy and some in-depth tutorials for selected operators (such as Kafka Input).
Java API documentation
for recent releases is available under
Writing Apache Apex Applications
Beginner's Guide to Apache Apex
This document provides a comprehensive overview of Apex and is recommended for developers just starting out with Apex.
Building Your First Apache Apex Application
This video has a hands-on demonstration of how to check out the source code repositories and build them, then run the maven archetype command to generate a new Apache Apex project, populate the project with Java source files for a new application, and finally, build and run the application -- all on a virtual machine running Linux with Apache Hadoop installed.
Writing an Apache Apex application
A PDF document that frames a hands-on exercise of building a basic application; also includes a diagram illustrating the life-cycle of operators.
Top N Words Application Tutorial
This document provides a detailed step-by-step description of how to build and run a word counting application with Apache Apex starting with setting up your development environment, progressing to building, running and monitoring the application, visualizing the output and concluding with some advanced features such as assessing operator memory requirements, partitioning, and debugging.
Sales Dimensions Application Tutorial
Similar to the Top N Words application but covers dimensional computations on a simulated sales data stream.
Sample code for specialized tutorials covering a variety of topics such as large key-value state management (HDHT), custom partitioning using stream codecs, etc.
This is part of the source repository for Apache Apex Malhar and contains a number of more substantial sample applications that developers will find especially useful. They include an application that computes some statistics (such as moving averages) from a live stream of stock transactions from
; one that analyzes a synthetic stream of eruption event data for the
geyser; a Twitter stream analyzer; and a simulated fraud detector.
Presentations from past meetup events and other talks covering Apache Apex introduction, feature deep dive, integration, customer use cases and more.
Next Gen Decision Making in < 2ms
A video discussing CapitalOne's experience with Apache Apex and evaluation of competing technologies along with the
Introducing Apache Apex
A webinar that begins with the historical context for the rise of Hadoop and Big Data, discusses why the promise of Hadoop remains largely unfulfilled and why moving beyond Map-Reduce model is essential and why operability is critically important. It continues with a discussion of the programming model, the various components of a running application on a YARN cluster and the large library of operators and connectors available with Apache Apex for reading data from and writing data to external systems. Concludes with a brief description of the visualization dashboards.
Stream Processing with Apache Apex (video)
A broad overview slide deck covering topics such as windowing, static and dynamic partitioning, unification, fault tolerance, locality, monitoring, etc.
Fault Tolerance and Processing Semantics (video)
A webinar covering core Apache Apex features including checkpointing and fault tolerance with fast, incremental recovery via a buffer server which uses a publish-subscribe model for inter-operator data transport. A variety of failure scenarios and processing guarantees are discussed.
Smart Partitioning with Apache Apex (video)
Webinar covering partitioning, including unique Apex features such as elasticity with dynamic resource allocation, parallel partitions for speculative execution and processing SLA etc.
Real Time Stream Processing Versus Batch
Slide deck compares and contrasts the needs, use cases and challenges of stream processing with those of batch processing.
Introducing Apache Apex
Introduces Apache Apex and discusses how it addresses the current challenges of Big Data in the areas of code reuse, operability, ease of use and the benefits of a YARN-native solution.
Tracing DAGs from Specification to Execution
Discusses DAGs (Directed Acyclic Graphs) as an application model, how they can be specified in Java or via JSON, how the platform transforms them to physical plans for scaling and how they can be monitored via the REST API.
An Introduction to Checkpointing in Apache Apex
Discusses checkpointing by saving serializing operator state to HDFS and how to configure the frequency of checkpointing (or skip it altogether) via attributes or annotations.
Operability — The Graveyard of Big Data Projects
Argues that operability is a critical aspect of Big Data projects which implementors ignore at their peril. Features of Apache Apex that solve operability issues are discussed broadly.
with Apache Apex
Details how Apache Apex can work in conjunction with transactional systems to provide
semantics. A simple example of reading data from a Kafka topic and writing processed results to a SQL database is discussed along with the relevant operators (already provided in the Apex Malhar library) and the importance of idempotency.
Dimensions Computation - Part 1: Introduction
A two-part blog that discusses dimensions computation in Apache Apex in considerable detail. The first part introduces the domain, shows an
object to model tuples in the data stream and analyzes the various dimensions of interest.
Dimensions Computation - Part 2: Implementation
The second part continues with discussion of the three phases involved (
) the JSON schema to encapsulate the various keys and aggregates, code fragments and, finally, concludes with visualization of the results.
Apache Apex Performance Benchmarks
Discusses the performance suite used to certify releases.
Apache Software Foundation
Discusses the history of the foundation, guiding principles, current statistics and provides numerous additional links for details of how the foundation operates and is managed.
Data Ingestion Platform - Xavient Information Systems
Discusses usage of Apache Apex in their data ingestion platform.