Subsquid indexers status API

A Spring Boot application which uses Quartz scheduler to periodically fetch the statuses of the running Subsquid indexers. The list of indexers is taken from Github.

A REST API GET /statuses endpoint is provided to consume this information by bots and front-end dashboards.

For simplicity, all data retrieved by Quartz job is stored in memory.

Configuration

The following environment variables affect the application:

1. INDEXERS_LIST - Direct URL to file on GitHub with the list of deployed indexers URLs
2. REPEAT_INTERVAL_SECS - time interval (in seconds) for Quartz to re-query all the statuses
3. CONNECT_TIMEOUT_MILLIS - Spring Rest Template connect timeout (in ms).
4. READ_TIMEOUT_MILLIS - Spring Rest Template read timeout (in ms). See SO comment for context.

Building / Running Locally

mvn clean package

mvn spring-boot:run

Running in Prod

java -jar indexer-api-0.0.1-SNAPSHOT.jar

Running as Docker container

To publish the image to docker registry

mvn compile jib:build

To run the image

docker run -d -p 8080:8080 --name indexer-api isonar/subsquid-indexers-api

Accessing the endpoint

curl http://localhost:8080/statuses