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# 创建物品交互事件跟踪器
<a name="event-get-tracker"></a>

必须先创建物品交互事件跟踪器，然后才能记录物品交互事件。*事件跟踪器*会将新事件数据定向到数据集组中的*物品交互数据集*。

使用 Amazon Personalize 控制台或 [CreateEventTracker](API_CreateEventTracker.md) API 操作创建事件跟踪器。将以下内容作为参数传递：包含目标物品交互数据集的数据集组的 Amazon 资源名称 (ARN)。有关使用 Amazon Personalize 控制台创建事件跟踪器的说明，请参阅[创建事件跟踪器（控制台）](importing-interactions.md#event-tracker-console)。

 事件跟踪器包括*跟踪 ID*，您在使用[PutEvents](https://docs.amazonaws.cn/personalize/latest/dg/API_UBS_PutEvents.html)操作时将其作为参数传递。然后，Amazon Personalize 将新事件数据附加到您在事件跟踪器中指定的数据集组的物品交互数据集中。

**注意**  
您只能为一个数据集组创建一个物品交互事件跟踪器。

------
#### [ Python ]

```
import boto3

personalize = boto3.client('personalize')

response = personalize.create_event_tracker(
    name='MovieClickTracker',
    datasetGroupArn='arn:aws:personalize:us-west-2:{{acct-id}}:dataset-group/MovieClickGroup'
)
print(response['eventTrackerArn'])
print(response['trackingId'])
```

此时将显示事件跟踪器 ARN 和跟踪 ID，例如：

```
{
    "eventTrackerArn": "arn:aws:personalize:us-west-2:acct-id:event-tracker/MovieClickTracker",
    "trackingId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}
```

------
#### [ Amazon CLI ]

```
aws personalize create-event-tracker \
    --name MovieClickTracker \
    --dataset-group-arn arn:aws:personalize:us-west-2:{{acct-id}}:dataset-group/MovieClickGroup
```

此时将显示事件跟踪器 ARN 和跟踪 ID，例如：

```
{
    "eventTrackerArn": "arn:aws:personalize:us-west-2:acct-id:event-tracker/MovieClickTracker",
    "trackingId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}
```

------
#### [ SDK for JavaScript v3 ]

```
// Get service clients module and commands using ES6 syntax.
import { CreateEventTrackerCommand } from "@aws-sdk/client-personalize";
import { personalizeClient } from "./libs/personalizeClients.js";

// Or, create the client here.
// const personalizeClient = new PersonalizeClient({ region: "REGION"});

// Set the event tracker's parameters.
export const createEventTrackerParam = {
  datasetGroupArn: "DATASET_GROUP_ARN" /* required */,
  name: "NAME" /* required */,
};

export const run = async () => {
  try {
    const response = await personalizeClient.send(
      new CreateEventTrackerCommand(createEventTrackerParam),
    );
    console.log("Success", response);
    return response; // For unit tests.
  } catch (err) {
    console.log("Error", err);
  }
};
run();
```

------
#### [ SDK for Java 2.x ]

```
public static String createEventTracker(PersonalizeClient personalizeClient, 
                                      String eventTrackerName, 
                                      String datasetGroupArn) {
        
    String eventTrackerId = null;
    String eventTrackerArn = null;
    long maxTime = 3 * 60 * 60; 
    long waitInMilliseconds = 30 * 1000;
    String status;
    
    try {
        CreateEventTrackerRequest createEventTrackerRequest = CreateEventTrackerRequest.builder()
            .name(eventTrackerName)
            .datasetGroupArn(datasetGroupArn)
            .build();
       
        CreateEventTrackerResponse createEventTrackerResponse = 
            personalizeClient.createEventTracker(createEventTrackerRequest);
        
        eventTrackerArn = createEventTrackerResponse.eventTrackerArn();
        eventTrackerId = createEventTrackerResponse.trackingId();
        
        System.out.println("Event tracker ARN: " + eventTrackerArn);
        System.out.println("Event tracker ID: " + eventTrackerId);

        maxTime = Instant.now().getEpochSecond() + maxTime;

        DescribeEventTrackerRequest describeRequest = DescribeEventTrackerRequest.builder()
            .eventTrackerArn(eventTrackerArn)
            .build();
        
        while (Instant.now().getEpochSecond() < maxTime) {

            status = personalizeClient.describeEventTracker(describeRequest).eventTracker().status();
            System.out.println("EventTracker status: " + status);

            if (status.equals("ACTIVE") || status.equals("CREATE FAILED")) {
                break;
            }
            try {
                Thread.sleep(waitInMilliseconds);
            } catch (InterruptedException e) {
                System.out.println(e.getMessage());
            }
        }
        return eventTrackerId;
    }
    catch (PersonalizeException e){
        System.out.println(e.awsErrorDetails().errorMessage());
        System.exit(1);
    }
    return eventTrackerId;
}
```

------