Help to apply Image Automation through program

Hi,

I am able to create Static File and IMAGE using API, but I am not able to apply automation though program. Kindly please help me how we can apply automation.

Code:

ContentType myContenttypeImage = (ContentType) ContentType.findByName("DSX-MEDIA-IMAGE");
           ContentInstance image = (ContentInstance) myContenttypeImage.newInstance();
           image.setLogicalPath("/testing");
           image.setAttributeValue("OT_WEM_VA_LOCALE", "LenUSL000000000000000000000000000000RCRD");
           image.setAttributeValue("TITLE", staticFileName);
           image.setAttributeValue("SOURCEPATH", "/testing"+ "/" + staticFileName);
           image.setAttributeValue("MEDIACLASSTYPE", "asset");
           image.setAttributeValue("MEDIATYPE", "image");
           image.setAttributeValue("MediaAutomations", "Image Automation");
           image.commit();

We are using below Image automation for Image.

<automations>
<automation>
   <id>imageautomation</id>
   <type>upload</type>
    <name>Image Automation</name>
      <targetType>DSX-MEDIA-IMAGE</targetType>
    <description>Automatically creates all sizes of images from the source.</description>
    <actions>
<createformat width="320" fileappend="thumb_320" sizeformat="carousel-thumb-320w" deviceformat="web" resizetype="constrain"/>
   </actions>
</automation>
</automations>