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tvsguide.io · Projects · Bloviate

Bloviate

Java library for generating realistic test data for databases

Bloviate is a Java library for generating realistic test data for JDBC-compatible relational databases and flat files. It automatically analyzes database schemas and generates appropriate data while respecting foreign key relationships and constraints.

Supports PostgreSQL, MySQL, and CockroachDB with type-aware data generation based on column metadata. Uses topological sorting to handle complex table dependencies and can export to CSV, TSV, and pipe-delimited formats.

Tech: Java, Maven, PostgreSQL, MySQL, CockroachDB, TestContainers

Features

Automatic schema discovery and relationship analysis
Type-aware data generation based on column types and constraints
Foreign key support with topological sorting
Flat file generation (CSV, TSV, pipe-delimited)
Graph visualization of table relationships in DOT notation

Links: GitHub: timveil/bloviate

More from the portfolio

This project is part of tvsguide.io, the personal portfolio of Tim Veil — software engineer and CIO at Two Bear Capital, previously at StarTree, Cockroach Labs, and Hortonworks. The full collection covers distributed systems, data infrastructure, JDBC drivers, AI services, build pipelines, real-time analytics, and a couple of personal apps. Each project ships with source code, tech notes, and links to live deployments where applicable.

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Fivetran Standard Metrics Connector — Custom Fivetran connector for portfolio company metrics
Fivetran dbt — dbt project transforming multi-source data into BigQuery
Pinot TestContainers Example — Integration testing framework for Apache Pinot using TestContainers
CockroachDB Remote Client — Docker container for one-time CockroachDB administrative tasks
CockroachDB Single Node — CI/CD optimized Docker image for CockroachDB testing
CockroachDB Dynamic Certs — Dynamic certificate generator for secure CockroachDB deployments
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CockroachDB Spring Examples — Spring Boot examples for connecting to CockroachDB

Browse the project index, read about Tim's background, follow the blog, or return to the homepage. Source code lives on GitHub; professional history is on LinkedIn.