public String getNamespaceId() {
        return this.namespaceId;
    }
<p>
The namespace used to indicate that a job is a customer-managed job.
</p>
<p>
When you specify a value for this parameter, Amazon Web Services IoT Core sends jobs notifications to MQTT topics
that contain the value in the following format.
</p>
<p>
<code>$aws/things/<i>THING_NAME</i>/jobs/<i>JOB_ID</i>/notify-namespace-<i>NAMESPACE_ID</i>/</code>
</p>
<note>
<p>
The <code>namespaceId</code> feature is only supported by IoT Greengrass at this time. For more information, see
<a href="https://docs.aws.amazon.com/greengrass/v2/developerguide/setting-up.html">Setting up IoT Greengrass core
devices.</a>
</p>
</note>

@return The namespace used to indicate that a job is a customer-managed job.</p>
        <p>
        When you specify a value for this parameter, Amazon Web Services IoT Core sends jobs notifications to
        MQTT topics that contain the value in the following format.
        </p>
        <p>
        <code>$aws/things/<i>THING_NAME</i>/jobs/<i>JOB_ID</i>/notify-namespace-<i>NAMESPACE_ID</i>/</code>
        </p>
        <note>
        <p>
        The <code>namespaceId</code> feature is only supported by IoT Greengrass at this time. For more
        information, see <a
        href="https://docs.aws.amazon.com/greengrass/v2/developerguide/setting-up.html">Setting up IoT Greengrass
        core devices.</a>
        </p>
aws-java-sdk-iot/src/main/java/com/amazonaws/services/iot/model/Job.java