@Path("{clusterName}/alert_history")
  public AlertHistoryService getAlertHistoryService(
      @Context jakarta.ws.rs.core.Request request,
      @PathParam("clusterName") String clusterName) {
    return new AlertHistoryService(clusterName, null, null);
  }
Gets the alert history service

@param request
         the request
@param clusterName
         the cluster name

@return the alert history service
ambari-server/src/main/java/org/apache/ambari/server/api/services/ClusterService.java