🎉 2.0.0

Released February 20, 2026 🎉

Eventum 2.0 is a complete rewrite from the ground up! New plugin-based architecture, batch processing, a built-in web UI, and much more. This is a major release — configurations from 1.x will need to be updated.

🚀 New features

Input plugins

• http input plugin — trigger event generation from external systems via HTTP requests.
• Live & sample modes for all input plugins — run in real-time or generate as fast as possible.
• Human-readable dates — write "January 1, 2025", "+1h", or "now" instead of strict ISO formats.
• Multiple input merging — combine several input plugins in one generator, timestamps are merged automatically in chronological order.

Event plugins

• script plugin — write event logic as a Python function when templates aren't enough.
• replay plugin — replay events from existing log files with optional timestamp replacement.

Template plugin enhancements

• Faker & Mimesis — two powerful data generation libraries available directly in templates (70+ locales, hundreds of data providers).
• module gateway — access any installed Python package in templates via module.<package>.
• Global state — new globals scope for sharing state across all generators (thread-safe).
• New state methods — update, clear, and as_dict for all state scopes.
• New picking modes — fsm (finite state machine) and chain (fixed sequence).
• New sample types — json and items (inline lists in YAML).
• Timezone-aware timestamps — timestamp is now a proper datetime object, not a string.
• Better subprocesses — new cwd, env, and timeout options.

Output plugins

• clickhouse plugin — write events directly to ClickHouse.
• http plugin — send events to any HTTP endpoint.
• Formatters — transform events before delivery with plain, json, json-batch, template, or template-batch.

Existing output plugin improvements

• File — new flush_interval, cleanup_interval, file_mode, write_mode, encoding, and separator options.
• Stdout — new flush_interval, stream, encoding, and separator options.
• OpenSearch — new connect_timeout, request_timeout, client_cert, client_cert_key, and proxy_url options.

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⚡ Performance

Batch processing across the entire pipeline — events are grouped into configurable batches between stages, dramatically reducing overhead and improving throughput compared to 1.x.

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🧪 Testing

Expanded test coverage for all plugins, the core executor, configuration loading, and the CLI.

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🏗️ Architecture

The entire project has been rebuilt from scratch:

• Plugin system — self-registering plugins with a consistent structure.
• Async pipeline — uvloop event loop with janus queues for efficient stage-to-stage communication.
• Configuration — Pydantic-based validation with ${params.*} and ${secrets.*} variable substitution.
• CLI — rebuilt with Click, options auto-generated from config models.
• REST API — new FastAPI-based API for programmatic control.
• Eventum Studio — brand-new React web UI for visual editing, debugging, and monitoring.

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📝 Other changes

• 🔄 sample input plugin renamed to static.
• 🔄 jinja event plugin renamed to template.
• 📋 Structured logging via structlog — supports plain-text and JSON output.
• 🛡️ Better error diagnostics — exceptions now carry structured context for easier troubleshooting.