```Python hl_lines="6"
{!../../docs_src/events/tutorial002.py!}
```

Hier schreibt die `shutdown`-Eventhandler-Funktion eine Textzeile `"Application shutdown"` in eine Datei `log.txt`.

/// info

In der Funktion `open()` bedeutet `mode="a"` „append“ („anhängen“), sodass die Zeile nach dem, was sich in dieser Datei befindet, hinzugefügt wird, ohne den vorherigen Inhalt zu überschreiben.

///

        } catch (_: InterruptedIOException) {
          Thread.interrupted() // Temporarily clear the interrupted state.
          interrupted = true
        } catch (e: IOException) {
          Platform.get().log("Failed to read public suffix list", Platform.WARN, e)
          return
        }
      }
    } finally {
      if (interrupted) {
        Thread.currentThread().interrupt() // Retain interrupted status.
      }

import java.util.concurrent.atomic.AtomicLongArray;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Collections of strategies of generating the k * log(M) bits required for an element to be mapped
 * to a BloomFilter of M bits and k hash functions. These strategies are part of the serialized form

	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/types"
	"k8s.io/apimachinery/pkg/util/intstr"

	"istio.io/istio/cni/pkg/iptables"
	istiolog "istio.io/istio/pkg/log"
	"istio.io/istio/pkg/test/util/assert"
	"istio.io/istio/tools/istio-iptables/pkg/dependencies"
)

func setupLogging() {
	opts := istiolog.DefaultOptions()

      debugData = source.readByteString(opaqueDataLength.toLong())
    }
    handler.goAway(lastStreamId, errorCode, debugData)
  }

  /** Unlike other `readXxx()` functions, this one must log the frame before returning. */
  @Throws(IOException::class)
  private fun readWindowUpdate(
    handler: Handler,
    length: Int,
    flags: Int,
    streamId: Int,
  ) {
    val increment: Long

      Class<?> cls;
      try {
        cls = classInfo.load();
      } catch (NoClassDefFoundError e) {
        // In case there were linking problems, this is probably not a class we care to test anyway.
        logger.log(Level.SEVERE, "Cannot load class " + classInfo + ", skipping...", e);
        continue;
      }
      if (!cls.isInterface()) {
        classes.add(cls);
      }
    }
    return classes;
  }

If you use NATS server, check out this sample program below to log the bucket notification added to NATS.

```go
package main

// Import Go and NATS packages
import (
 "log"
 "runtime"

 "github.com/nats-io/nats.go"
)

func main() {

 // Create server connection
 natsConnection, _ := nats.Connect("nats://yourusername:yoursecret@localhost:4222")
 log.Println("Connected")

 // Subscribe to subject

      try {
        if (!file.exists()) {
          return;
        }
      } catch (SecurityException e) {
        logger.warning("Cannot access " + file + ": " + e);
        // TODO(emcmanus): consider whether to log other failure cases too.
        return;
      }
      if (file.isDirectory()) {
        scanDirectory(file, builder);
      } else {
        scanJar(file, scannedUris, builder);
      }
    }

- Kubeadm: Strictly enabled only the supported klog flags, disallowing previously available but unrecommended options. This means that hidden flags about klog (including `--alsologtostderr`, `--log-backtrace-at`, `--log-dir`, `--logtostderr`, `--log-file`, `--log-file-max-size`, `--one-output`, `--skip-log-headers`, `--stderrthreshold` and `--vmodule`) are no longer allowed to be used. ([#125179](https://github.com/kubernetes/kubernetes/pull/125179), [@SataQiu](https://github.com/SataQiu))

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.es.log.cbean.cq.bs;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.Collection;

import org.codelibs.fess.es.log.allcommon.EsAbstractConditionQuery;
import org.codelibs.fess.es.log.cbean.cq.ClickLogCQ;
import org.dbflute.cbean.ckey.ConditionKey;
import org.opensearch.index.query.BoolQueryBuilder;