migrateTarget *Target

	// Number of events per HTTP send to webhook target
	// this is ideally useful only if your endpoint can
	// support reading multiple events on a stream for example
	// like : Splunk HTTP Event collector, if you are unsure
	// set this to '1'.
	batchSize   int
	payloadType string

	// store to persist and replay the logs to the target
	// to avoid missing events when the target is down.

	  #   - key: "content-type"
	  #     value: "image/*" # match objects with 'content-type', with all values starting with 'image/'

	notify:
	  endpoint: "https://notify.endpoint" # notification endpoint to receive job status events
	  token: "Bearer xxxxx" # optional authentication token for the notification endpoint

	retry:
	  attempts: 10 # number of retries for the job before giving up
	  delay: "500ms" # least amount of delay between each retry

{* ../../docs_src/stream_json_lines/tutorial001_py310.py ln[33:36] hl[34] *}

## 服务器发送事件（SSE） { #server-sent-events-sse }

}

// send - sends an event to the NSQ.
func (target *NSQTarget) send(eventData event.Event) error {
	objectName, err := url.QueryUnescape(eventData.S3.Object.Key)
	if err != nil {
		return err
	}
	key := eventData.S3.Bucket.Name + "/" + objectName

	data, err := json.Marshal(event.Log{EventName: eventData.EventName, Key: key, Records: []event.Event{eventData}})
	if err != nil {
		return err
	}

import org.apache.maven.api.annotations.Nonnull;

/**
 * Event sent by maven during various phases of the build process.
 * Such events can be listened to using {@link Listener}s objects
 * registered in the {@link Session}.
 *
 * @since 4.0.0
 */
@Experimental
public interface Event {

    /**
     * Gets the type of the event.
     *
     * @return the type of the event, never {@code null}
     */
    @Nonnull

	}
	return err
}

// send - sends an event to the webhook.
func (target *WebhookTarget) send(eventData event.Event) error {
	objectName, err := url.QueryUnescape(eventData.S3.Object.Key)
	if err != nil {
		return err
	}
	key := eventData.S3.Bucket.Name + "/" + objectName

	data, err := json.Marshal(event.Log{EventName: eventData.EventName, Key: key, Records: []event.Event{eventData}})
	if err != nil {
		return err
	}

user  nginx;
worker_processes  auto;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;

events {
    worker_connections  4096;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '

```
https://yourapi.com/invoices/?callback_url=https://www.external.org/events
```

JSON ボディは:

```JSON
{
    "id": "2expen51ve",
    "customer": "Mr. Richie Rich",
    "total": "9999"
}
```

その後 *あなたの API* は請求書を処理し、のちほど `callback_url`（*外部 API*）へコールバックのリクエストを送ります:

```
https://www.external.org/events/invoices/2expen51ve
```

JSON ボディは次のような内容です:

```JSON
{

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.api;

import org.apache.maven.api.annotations.Experimental;

/**
 * The possible types of execution events.
 *
 * @since 4.0.0
 */
@Experimental
public enum EventType {
    PROJECT_DISCOVERY_STARTED,
    SESSION_STARTED,
    SESSION_ENDED,
    PROJECT_SKIPPED,
    PROJECT_STARTED,
    PROJECT_SUCCEEDED,

import com.google.common.cache.LocalCache.Timestamped;
import java.util.LinkedHashMap;
import org.jspecify.annotations.Nullable;

/**
 * LinkedHashMap that enforces its maximum size and logs events in a StatsCounter object and an
 * optional RemovalListener.
 *
 * @param <K> the base key type
 * @param <V> the base value type
 */
final class CapacityEnforcingMap<K, V> extends LinkedHashMap<K, Timestamped<V>> {