Crypto search platform

Consists of 2 components:

1. Crypto indexer that fetches crypto data from FinnHub REST API and indexes it to ElasticSearch
2. Crypto search service that accepts query and uses ElasticSearch to read all matching cryptocurrencies

Technology stack:

1. Java 21
2. Elasticsearch
3. Kibana
4. APM Java Agent
5. gRPC
6. Dagger (for dependency injection)
7. JUnit, Mockito, AssertJ for testing

Start locally

export FINN_HUB_API_KEY=...
docker-compose up --build

View data in index:

curl http://localhost:9200/cryptos/_search?pretty&q=*:*&size=5000 | jq

Test locally

grpc-client-cli --proto ~/IdeaProjects/crypto-search-system/crypto-search-service/src/main/proto/crypto-search.proto localhost:8000

Example usage

Message json (type ? to see defaults): {"query": "bitmex"}
[{
  "symbol": "XRPUSDT",
  "description": "Bitmex XRPUSDT",
  "marketName": "BITMEX"
},
{
  "symbol": "BCHUSDT",
  "description": "Bitmex BCHUSDT",
  "marketName": "BITMEX"
},
{
  "symbol": "ARBUSD",
  "description": "Bitmex ARBUSD",
  "marketName": "BITMEX"
},
{
  "symbol": "ETHU23",
  "description": "Bitmex ETHU23",
  "marketName": "BITMEX"
},
{
  "symbol": "PEPEUSDT",
  "description": "Bitmex PEPEUSDT",
  "marketName": "BITMEX"
},
{
  "symbol": "1TAIDOGEUSDT",
  "description": "Bitmex 1TAIDOGEUSDT",
  "marketName": "BITMEX"
},
{
  "symbol": "ADAU23",
  "description": "Bitmex ADAU23",
  "marketName": "BITMEX"
},
{
  "symbol": "GMXUSDT",
  "description": "Bitmex GMXUSDT",
  "marketName": "BITMEX"
},
{
  "symbol": "BMEXUSDT",
  "description": "Bitmex BMEXUSDT",
  "marketName": "BITMEX"
},
{
  "symbol": "TRX_USDT",
  "description": "Bitmex TRX_USDT",
  "marketName": "BITMEX"
}]
Message json (type ? to see defaults): 

Kibana

http://localhost:5601/