public String getEventType() {
        return this.eventType;
    }
<p>
Specifies the event type that triggers a Lambda@Edge function invocation. You can specify the following values:
</p>
<ul>
<li>
<p>
<code>viewer-request</code>: The function executes when CloudFront receives a request from a viewer and before it
checks to see whether the requested object is in the edge cache.
</p>
</li>
<li>
<p>
<code>origin-request</code>: The function executes only when CloudFront sends a request to your origin. When the
requested object is in the edge cache, the function doesn't execute.
</p>
</li>
<li>
<p>
<code>origin-response</code>: The function executes after CloudFront receives a response from the origin and
before it caches the object in the response. When the requested object is in the edge cache, the function doesn't
execute.
</p>
</li>
<li>
<p>
<code>viewer-response</code>: The function executes before CloudFront returns the requested object to the viewer.
The function executes regardless of whether the object was already in the edge cache.
</p>
<p>
If the origin returns an HTTP status code other than HTTP 200 (OK), the function doesn't execute.
</p>
</li>
</ul>

@return Specifies the event type that triggers a Lambda@Edge function invocation. You can specify the following
        values:</p>
        <ul>
        <li>
        <p>
        <code>viewer-request</code>: The function executes when CloudFront receives a request from a viewer and
        before it checks to see whether the requested object is in the edge cache.
        </p>
        </li>
        <li>
        <p>
        <code>origin-request</code>: The function executes only when CloudFront sends a request to your origin.
        When the requested object is in the edge cache, the function doesn't execute.
        </p>
        </li>
        <li>
        <p>
        <code>origin-response</code>: The function executes after CloudFront receives a response from the origin
        and before it caches the object in the response. When the requested object is in the edge cache, the
        function doesn't execute.
        </p>
        </li>
        <li>
        <p>
        <code>viewer-response</code>: The function executes before CloudFront returns the requested object to the
        viewer. The function executes regardless of whether the object was already in the edge cache.
        </p>
        <p>
        If the origin returns an HTTP status code other than HTTP 200 (OK), the function doesn't execute.
        </p>
        </li>
@see EventType
aws-java-sdk-cloudfront/src/main/java/com/amazonaws/services/cloudfront/model/LambdaFunctionAssociation.java