Custom OpenTelemetry Collector for Oracle WebLogic: Bringing Observability to Enterprise Java

Short summary

This technical tutorial demonstrates building a minimal OpenTelemetry Collector for Oracle WebLogic using OCB, consolidating logs, JVM metrics, and traces into unified OTLP. The approach uses the OTel Java Agent for zero-code instrumentation, custom regex parsing for WebLogic logs, and JMX for JVM metrics. The repository includes integration tests and shows how to extend the collector with additional components like Prometheus or Kafka without bloat.

• •Build minimal OTel Collector for WebLogic with only essential components (OTLP, file log, host metrics, JMX receivers) using OCB
• •Zero-code Java instrumentation via OTel Java Agent paired with structured WebLogic log parsing and JMX metric collection
• •Includes real integration tests and modular architecture for extending with Prometheus/Kafka/mTLS without recompiling the base distribution

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