public void setSourceType(String sourceType) {
        this.sourceType = sourceType;
    }
<p>
The type of source that will be generating the events. For example, if you want to be notified of events
generated by a cluster, you would set this parameter to cluster. If this value is not specified, events are
returned for all Amazon Redshift objects in your Amazon Web Services account. You must specify a source type in
order to specify source IDs.
</p>
<p>
Valid values: cluster, cluster-parameter-group, cluster-security-group, cluster-snapshot, and scheduled-action.
</p>

@param sourceType
       The type of source that will be generating the events. For example, if you want to be notified of events
       generated by a cluster, you would set this parameter to cluster. If this value is not specified, events
       are returned for all Amazon Redshift objects in your Amazon Web Services account. You must specify a
       source type in order to specify source IDs.</p>
       <p>
       Valid values: cluster, cluster-parameter-group, cluster-security-group, cluster-snapshot, and
       scheduled-action.
aws-java-sdk-redshift/src/main/java/com/amazonaws/services/redshift/model/CreateEventSubscriptionRequest.java