Examples with CountersEntity org.apache.nifi.web.api.entity.CountersEntity used on opensource projects

Example 1 with CountersEntity

use of org.apache.nifi.web.api.entity.CountersEntity in project nifi by apache.

the class CountersResource method getCounters.

/**
 * Retrieves the counters report for this NiFi.
 *
 * @return A countersEntity.
 * @throws InterruptedException if interrupted
 */
@GET
@Consumes(MediaType.WILDCARD)
@Produces(MediaType.APPLICATION_JSON)
// necessary due to a bug in swagger
@Path("")
@ApiOperation(value = "Gets the current counters for this NiFi", notes = NON_GUARANTEED_ENDPOINT, response = CountersEntity.class, authorizations = { @Authorization(value = "Read - /counters") })
@ApiResponses(value = { @ApiResponse(code = 400, message = "NiFi was unable to complete the request because it was invalid. The request should not be retried without modification."), @ApiResponse(code = 401, message = "Client could not be authenticated."), @ApiResponse(code = 403, message = "Client is not authorized to make this request."), @ApiResponse(code = 409, message = "The request was valid but NiFi was not in the appropriate state to process it. Retrying the same request later may be successful.") })
public Response getCounters(@ApiParam(value = "Whether or not to include the breakdown per node. Optional, defaults to false", required = false) @QueryParam("nodewise") @DefaultValue(NODEWISE) final Boolean nodewise, @ApiParam(value = "The id of the node where to get the status.", required = false) @QueryParam("clusterNodeId") final String clusterNodeId) throws InterruptedException {
    authorizeCounters(RequestAction.READ);
    // ensure a valid request
    if (Boolean.TRUE.equals(nodewise) && clusterNodeId != null) {
        throw new IllegalArgumentException("Nodewise requests cannot be directed at a specific node.");
    }
    // replicate if necessary
    if (isReplicateRequest()) {
        // determine where this request should be sent
        if (clusterNodeId == null) {
            final NodeResponse nodeResponse;
            // to the cluster nodes themselves.
            if (getReplicationTarget() == ReplicationTarget.CLUSTER_NODES) {
                nodeResponse = getRequestReplicator().replicate(HttpMethod.GET, getAbsolutePath(), getRequestParameters(), getHeaders()).awaitMergedResponse();
            } else {
                nodeResponse = getRequestReplicator().forwardToCoordinator(getClusterCoordinatorNode(), HttpMethod.GET, getAbsolutePath(), getRequestParameters(), getHeaders()).awaitMergedResponse();
            }
            final CountersEntity entity = (CountersEntity) nodeResponse.getUpdatedEntity();
            // ensure there is an updated entity (result of merging) and prune the response as necessary
            if (entity != null && !nodewise) {
                entity.getCounters().setNodeSnapshots(null);
            }
            return nodeResponse.getResponse();
        } else {
            // get the target node and ensure it exists
            final NodeIdentifier targetNode = getClusterCoordinator().getNodeIdentifier(clusterNodeId);
            if (targetNode == null) {
                throw new UnknownNodeException("The specified cluster node does not exist.");
            }
            return replicate(HttpMethod.GET, targetNode);
        }
    }
    final CountersDTO countersReport = serviceFacade.getCounters();
    // create the response entity
    final CountersEntity entity = new CountersEntity();
    entity.setCounters(countersReport);
    // generate the response
    return generateOkResponse(entity).build();
}