public void setClusterId(Long clusterId) {
    this.clusterId = clusterId;
  }
Sets the ID of the cluster that this alert definition is created for. Each
cluster has their own set of alert definitions that are not shared with any
other cluster.

@param clusterId the ID of the cluster (not {@code null}).
ambari-server/src/main/java/org/apache/ambari/server/orm/entities/AlertDefinitionEntity.java