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Astyanax is a Java Cassandra client library. Astyanax was the son of Hector in Greek mythology. As such, Astyanax is a refactoring of Hector into a cleaner abstraction for the connection manager and a simpler API.

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Getting Started

See the page for quick start Getting-Started

FAQ

Please see the FAQ page

Recipes

Astyanax implements a set of common cassandra use casses as recipes.

Distributed-Row-Lock	Lock semantics on a single row within a column family.
Uniqueness-Constraint	Similar to Distributed-Row-Lock except for that the lock has no TTL and can be used to check whether a row already exists.
Multi-Row-Uniqueness-Constraint	Extension of Uniqueness-Constraint across multiple column families which checkes whether an entire set of rows is unique.
Chunked-Object-Store	Optimizes chunking and parallel upload and download of large files. Reduces heap pressure caused by storing very large objects that are accessed with high concurrency.
Reverse-Index-Search
All-Rows-Query	Iterate through all rows in a single column family by properly parallelizing and paginating.
Message-Queue	Experimental message queue
Task-Scheduler	Quartz like task scheduler built on top of the message-queue

Examples

CQL-and-CQL3
Create-keyspace-or-column-family
Writing-Data
Reading-Data
Working-with-counter-columns
Composite-Columns
Entity-Mapping
Customizing-calls