Logback

Once this integration is configured you can also use Sentry’s static API, as shown on the usage page, in order to do things like record breadcrumbs, set the current user, or manually send events. The source can be found on GitHub.

On this page, we get you up and running with Sentry's SDK.

Don't already have an account and Sentry project established? Head over to sentry.io, then return to this page.

Install

Sentry captures data by using an SDK within your application’s runtime.

<dependency>
    <groupId>io.sentry</groupId>
    <artifactId>sentry-logback</artifactId>
    <version>8.0.0</version>
</dependency>

For other dependency managers, see the central Maven repository.

SENTRY_PROPERTIES_FILE=sentry.properties java -javaagent:sentry-opentelemetry-agent-8.0.0.jar -jar your-application.jar

Configure

Configuration should happen as early as possible in your application's lifecycle.

The following example configures a ConsoleAppender that logs to standard out at the INFO level, and a SentryAppender that logs to the Sentry server at the ERROR level.

<configuration>
    <!-- Configure the Console appender -->
    <appender name="Console" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern
      >%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>

    <!-- Configure the Sentry appender, overriding the logging threshold to the WARN level -->
    <appender name="Sentry" class="io.sentry.logback.SentryAppender">
        <options>
            <!-- NOTE: Replace the test DSN below with YOUR OWN DSN to see the events from this app in your Sentry project/dashboard -->
            <dsn>https://examplePublicKey@o0.ingest.sentry.io/0</dsn>
        </options>
    </appender>

    <!-- Enable the Console and Sentry appenders, Console is provided as an example
 of a non-Sentry logger that is set to a different logging threshold -->
    <root level="INFO">
        <appender-ref ref="Console" />
        <appender-ref ref="Sentry" />
    </root>
</configuration>

<configuration>
    <!-- Configure the Console appender -->
    <appender name="Console" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern
      >%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>

    <!-- Configure the Sentry appender, overriding the logging threshold to the WARN level -->
    <appender name="Sentry" class="io.sentry.logback.SentryAppender" />

    <!-- Enable the Console and Sentry appenders, Console is provided as an example
 of a non-Sentry logger that is set to a different logging threshold -->
    <root level="INFO">
        <appender-ref ref="Console" />
        <appender-ref ref="Sentry" />
    </root>
</configuration>

<appender name="Sentry" class="io.sentry.logback.SentryAppender">
    <options>
        <!-- NOTE: Replace the test DSN below with your DSN to see the events from this app in sentry.io -->
        <dsn>https://examplePublicKey@o0.ingest.sentry.io/0</dsn>
    </options>
</appender>

Minimum Log Level

Two log levels are used to configure this integration:

1. Configure the lowest level required for a log message to become an event (minimumEventLevel) sent to Sentry.
2. Configure the lowest level a message has to be to become a breadcrumb (minimumBreadcrumbLevel).

Breadcrumbs are kept in memory (by default the last 100 records) and are sent with events. For example, by default, if you log 100 entries with logger.info or logger.warn, no event is sent to Sentry. If you then log with logger.error, an event is sent to Sentry which includes those 100 info or warn messages. For this to work, SentryAppender needs to receive all log entries to decide what to keep as breadcrumb or sent as event. Set the SentryAppender log level configuration to a value lower than what is set for the minimumBreadcrumbLevel and minimumEventLevel so that SentryAppender receives these log messages.

<appender name="Sentry" class="io.sentry.logback.SentryAppender">
    <options>
        <!-- NOTE: Replace the test DSN below with YOUR OWN DSN to see the events from this app in your Sentry project/dashboard -->
        <dsn>https://examplePublicKey@o0.ingest.sentry.io/0</dsn>
    </options>
    <!-- Optionally change minimum Event level. Default for Events is ERROR -->
    <minimumEventLevel>WARN</minimumEventLevel>
    <!-- Optionally change minimum Breadcrumbs level. Default for Breadcrumbs is INFO -->
    <minimumBreadcrumbLevel>DEBUG</minimumBreadcrumbLevel>
</appender>

<appender name="Sentry" class="io.sentry.logback.SentryAppender">
    <!-- Optionally change minimum Event level. Default for Events is ERROR -->
    <minimumEventLevel>WARN</minimumEventLevel>
    <!-- Optionally change minimum Breadcrumbs level. Default for Breadcrumbs is INFO -->
    <minimumBreadcrumbLevel>DEBUG</minimumBreadcrumbLevel>
</appender>

dsn=https://examplePublicKey@o0.ingest.sentry.io/0
traces-sample-rate=1.0

Verify

This snippet includes an intentional error, so you can test that everything is working as soon as you set it up.

import io.sentry.Sentry;

try {
  throw new Exception("This is a test.");
} catch (Exception e) {
  Sentry.captureException(e);
}

To view and resolve the recorded error, log into sentry.io and select your project. Clicking on the error's title will open a page where you can see detailed information and mark it as resolved.