Advanced Usage

import java.util.logging.Level;
import org.slf4j.MDC;

void logWithExtras() {
  // MDC extras
  MDC.put("Environment", "Development");
  MDC.put("OS", "Linux");

  // This sends an event where the Environment and OS MDC values are set as MDC entries
  logger.log(Level.SEVERE, "This is a test");
}

import io.sentry.Sentry;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.slf4j.MDC;

public class MyClass {
  private final Logger logger = Logger.getLogger(MyClass.class.getName());

  void logSimpleMessage() {
    // This sends a simple event to Sentry
    logger.severe("This is a test");
  }

  void logWithBreadcrumbs() {
    // Record a breadcrumb that will be sent with the next event(s),
    // by default the last 100 breadcrumbs are kept.
    Sentry.addBreadcrumb("User made an action");

    // Log entries below `minimumEventLevel` and above or equal to `minimumBreadcrumbLevel`
    // are recorded as breadcrumbs
    logger.info("User made another action");

    // This sends a simple event to Sentry
    logger.severe("This is a test");
  }

  void logWithExtras() {
    // MDC extras
    MDC.put("extra_key", "extra_value");
    // This sends an event with extra data to Sentry
    logger.severe("This is a test");
  }

  void logException() {
    try {
      unsafeMethod();
    } catch (Exception e) {
      // This sends an exception event to Sentry
      logger.log(Level.SEVERE, "Exception caught", e);
    }
  }

  void unsafeMethod() {
    throw new UnsupportedOperationException("You shouldn't call this!");
  }
}