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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Prometheus doesn't deal with logs at all - only metrics. Even just for metrics, you have several different choices depending on how your Java application is running. You may be able to use the JMX Exporter to expose the metrics that you would then scrape with Prometheus. For the logs, you'll need something like Fluent Bit as an agent to grab ('tail' in Fluent Bit input terms) the logs and send them to Elasticsearch or Grafana Loki.
NOTE:
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Hence, a higher number means a more popular project.