Servlet

The Sentry Java SDK can be used with Kotlin, Scala, and other JVM languages. Code examples are typically provided in both Java and Kotlin.

On this page, we get you up and running with Sentry's SDK, so that it will automatically report errors and exceptions in your application.

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.

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<dependency>
    <groupId>io.sentry</groupId>
    <artifactId>sentry-servlet</artifactId>
    <version>4.3.0</version>
</dependency>

For other dependency managers, see the central Maven repository.

sentry-servlet module comes with a ServletContainerInitializer that registers a ServletRequestListener which enhances each Sentry event triggered within the scope of HTTP request with a request information like HTTP method, query string, url and HTTP headers.

Configure

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

The following example configures a SentryInitializer servlet container initializer that initializes Sentry on application startup.

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package sentry.sample;

import io.sentry.Sentry;
import javax.servlet.ServletContainerInitializer;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;

public final class SentryInitializer implements ServletContainerInitializer {

  @Override
  public void onStartup(Set<Class<?>> c, ServletContext ctx) throws ServletException {
    Sentry.init(options -> {
      options.setDsn("https://examplePublicKey@o0.ingest.sentry.io/0");
    });
  }
}

Create a file in src/main/resources/META-INF/services named javax.servlet.ServletContainerInitializer, with a full name of your custom SentryInitializer class as a content:

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sentry.sample.SentryInitializer

Verify

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

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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 open your project. Clicking on the error's title will open a page where you can see detailed information and mark it as resolved.

You can edit this page on GitHub.