如何监控Java函数的性能并在发生问题时收到警报？

<dependency>
  <groupId>com.google.cloud</groupId>
  <artifactId>functions-framework-java</artifactId>
  <version>1.0.35</version>
</dependency>

<dependency>
  <groupId>com.google.cloud</groupId>
  <artifactId>google-cloud-functions</artifactId>
  <version>3.3.0</version>
</dependency>

import com.google.cloud.functions.HttpFunction;
import com.google.cloud.functions.HttpRequest;
import com.google.cloud.functions.HttpResponse;
import java.io.IOException;
import java.io.PrintWriter;

public class MyFunction implements HttpFunction {
    @Override
    public void service(HttpRequest request, HttpResponse response)
            throws IOException {
        // 您的函数逻辑
        PrintWriter writer = response.getWriter();
        writer.print("Hello World!");
    }
}

<dependency>
  <groupId>io.opencensus</groupId>
  <artifactId>opencensus-exporter-stats-cloud</artifactId>
  <version>0.16.0</version>
</dependency>

import io.opencensus.exporter.stats.stackdriver.StackdriverStatsExporter;
import io.opencensus.stats.Stats;
import io.opencensus.stats.ViewManager;
import java.util.List;

public class MyFunction implements HttpFunction {
    private static final StackdriverStatsExporter exporter =
            StackdriverStatsExporter.createAndRegister();

    private static final List<String> MONITORED_FUNCTIONS = List.of("http_server", "fn");

    // Add a shutdown hook to stop the exporter at the end of the app lifecycle.
    // This is a best-effort attempt to ensure that metrics are flushed before termination.
    public static void init() {
        Runtime.getRuntime().addShutdownHook(exporter::shutdown);
    }

    @Override
    public void service(HttpRequest request, HttpResponse response)
            throws IOException {
        // Monitor the execution of your function using Stackdriver.
        // You can enable monitoring by setting the FUNCTIONS_SIGNATURE_TYPE environment
        // variable as shown at https://cloud.google.com/functions/docs/monitoring/logging.
        ViewManager viewManager = Stats.getViewManager();
        // We only need to register the default views once per JVM.
        // However, you can register views more than once, and the duplicate registrations
        // will be ignored after the first time. Alternatively, you can configure all of the
        // default views with a parameter.
        viewManager.registerAllViews();
    }
}

gcloud functions deploy my-function \
--entry-point MyFunction \
--runtime java11 \
--trigger-http