JavadocViewerService

A Spring Boot web service that automatically fetches, manages, and serves Javadoc documentation for Maven artifacts.

Features

Fetches Javadoc JARs from Maven Central or custom Maven repositories
Tracks multiple Maven artifacts with version detection
Serves generated Javadoc via a simple Bootstrap web UI
Scheduled updates via configurable cron expression
Persists metadata in an embedded H2 database (Liquibase-managed)

Requirements

JRE-21 or docker

Start

... with Java

java -jar jdvc-<version>.jar --spring.config.import=file:./jdvs.yml

.. with Docker

services:
  jvs-dockerized:
    image: git.mein-gateway.de/thischwa/javadocviewerservice:develop
    volumes:
      - /opt/javadocviewerservice-dockerized/jdvs.yml:/app/jdvs.yml:ro
      - /opt/javadocviewerservice-dockerized/database:/app/database
      - /opt/javadocviewerservice-dockerized/javadoc-storage:/app/javadoc-storage
    restart: unless-stopped
    ports:
      - "127.0.0.1:8086:8080"

Volume mapping:

Mount	Purpose
`jdvs.yml:/app/jdvs.yml:ro`	Injects the repository configuration (which artifacts to track) as read-only — the only file you need to edit
`database:/app/database`	Persists the H2 database so tracked version metadata survives restarts and image updates
`javadoc-storage:/app/javadoc-storage`	Persists generated Javadoc HTML so it is not lost on container recreation

Configuration

`application.yml`

Key defaults:

Property	Default	Description
`jdvs.base-dir`	`./javadoc-storage`	Storage root for generated Javadoc
`jdvs.cron`	`0 0/30 * * * ?`	Update schedule (every 30 min)
`jdvs.clean-on-start`	`false`	Wipe storage and DB on startup
`jdvs.run-on-start`	`false`	Run update immediately on startup
`jdvs.maven-central-url`	`https://repo1.maven.org/maven2`	Default Maven repository

`jdvs.yml`

Defines the repositories to track and individual settings (all key defaults can be overridden):

jdvs:
  repositories:
    - name: my-lib
      group-id: com.example
      artifact-id: my-lib
      # maven-repo-url: https://custom.repo/maven  # optional, defaults to Maven Central