public String getAction() {
        return this.action;
    }
<p>
Specifies how to update a campaign. The action can be one of the following:
</p>
<ul>
<li>
<p>
<code>APPROVE</code> - To approve delivering a data collection scheme to vehicles.
</p>
</li>
<li>
<p>
<code>SUSPEND</code> - To suspend collecting signal data. The campaign is deleted from vehicles and all vehicles
in the suspended campaign will stop sending data.
</p>
</li>
<li>
<p>
<code>RESUME</code> - To reactivate the <code>SUSPEND</code> campaign. The campaign is redeployed to all vehicles
and the vehicles will resume sending data.
</p>
</li>
<li>
<p>
<code>UPDATE</code> - To update a campaign.
</p>
</li>
</ul>

@return Specifies how to update a campaign. The action can be one of the following:</p>
        <ul>
        <li>
        <p>
        <code>APPROVE</code> - To approve delivering a data collection scheme to vehicles.
        </p>
        </li>
        <li>
        <p>
        <code>SUSPEND</code> - To suspend collecting signal data. The campaign is deleted from vehicles and all
        vehicles in the suspended campaign will stop sending data.
        </p>
        </li>
        <li>
        <p>
        <code>RESUME</code> - To reactivate the <code>SUSPEND</code> campaign. The campaign is redeployed to all
        vehicles and the vehicles will resume sending data.
        </p>
        </li>
        <li>
        <p>
        <code>UPDATE</code> - To update a campaign.
        </p>
        </li>
@see UpdateCampaignAction
aws-java-sdk-iotfleetwise/src/main/java/com/amazonaws/services/iotfleetwise/model/UpdateCampaignRequest.java