7a0de02059
Add crosspoll_state table to persist per-island generation counters across evolver restarts. Load state on startup and save after each cross-pollination check. Add persistence pattern and translation structure tests. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
77 lines
2.5 KiB
Markdown
77 lines
2.5 KiB
Markdown
# acb-starter-java
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Java starter kit for [AI Code Battle](https://aicodebattle.com) — a competitive bot programming platform.
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Uses Javalin for the HTTP server, Jackson for JSON, and `javax.crypto` for HMAC authentication.
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## Quick Start
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```bash
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# Build
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mvn package
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# Run locally
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BOT_SECRET=dev-secret java -jar target/starter-bot-1.0.0.jar
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# Run with Docker
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docker build -t my-bot .
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docker run -e BOT_SECRET=your-secret -p 8080:8080 my-bot
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```
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Your bot listens on port 8080 and responds to `POST /turn` with move commands.
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## Register Your Bot
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Once your bot is deployed and accessible via HTTPS:
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```bash
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curl -X POST https://api.aicodebattle.com/api/register \
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-H "Content-Type: application/json" \
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-d '{
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"name": "my-java-bot",
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"endpoint_url": "https://my-bot.example.com",
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"owner": "your-name",
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"description": "My awesome bot"
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}'
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```
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Save the `bot_id` and `shared_secret` from the response — the secret is shown only once.
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## Project Structure
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```
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src/main/java/com/acb/starter/App.java # Server, auth, types, and strategy
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src/main/java/com/acb/starter/Grid.java # Grid utilities (toroidal distance, BFS, neighbors)
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pom.xml # Maven build configuration
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Dockerfile # Multi-stage container build
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```
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## Grid Helpers
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`Grid.java` provides static utility methods for the toroidal grid:
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- `Grid.toroidalManhattan(r1, c1, r2, c2, rows, cols)` — Manhattan distance with wrap-around
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- `Grid.toroidalChebyshev(r1, c1, r2, c2, rows, cols)` — Chebyshev distance with wrap-around
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- `Grid.neighbors(row, col, rows, cols)` — 8-directional neighbors with wrap
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- `Grid.bfs(start, goal, passable, rows, cols)` — BFS pathfinding, returns path or `null`
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## Customization
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Edit `computeMoves()` in `App.java` to implement your strategy. The `GameState` object provides:
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- `bots` — all visible bots (yours and enemies)
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- `energy` — visible energy pickup locations
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- `cores` — visible core positions
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- `walls` — visible wall positions
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- `youEnergy` — your current energy count
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- `youScore` — your current score
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- `config` — match parameters (grid size, etc.)
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Return a `List<Map<String, Object>>`, each entry with `position` (your bot's current position) and `direction` (`"N"`, `"E"`, `"S"`, or `"W"`). Bots not included in the response stay in place.
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## Protocol
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- **Endpoint:** `POST /turn` — receives game state JSON, returns moves JSON
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- **Health:** `GET /health` — must return 200
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- **Timeout:** 3 seconds per turn
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- **Auth:** HMAC-SHA256 via `X-ACB-Signature` header
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