Jsegment

JSegment is a Java-based library designed to manage and process segmented data, enabling efficient handling of large datasets by dividing data into independently operable units called segments. It is used in contexts such as time-series analysis, log processing, and large file parsing, where loading the entire data set into memory is impractical.

The library provides a modular architecture with core concepts such as Segment, SegmentStore, and SegmentReader. Segments encapsulate a portion of data, while SegmentStore coordinates storage access, caching, and eviction. SegmentReader and SegmentWriter offer streaming interfaces that support sequential and parallel processing, allowing pipelines to operate on chunks without loading all data at once. JSegment emphasizes lazy loading, on-disk storage, and optional off-heap buffers to reduce garbage collection pressure in large-scale workloads.

The API is designed to integrate with Java streams and reactive frameworks, enabling map, filter, and reduce style operations over segmented data. It also includes utilities for serialization, chunking, and alignment of segment boundaries with external data formats. The project places emphasis on testability and provides tooling for benchmarking segmentation strategies and memory usage.

As an open-source project, JSegment maintains documentation, example applications, and contribution guidelines. It aims to be interoperable with common Java data-processing stacks and to serve as a building block for data pipelines that require controlled memory and predictable latency.