Examples with HttpErrorStatusProvider co.cask.cdap.api.common.HttpErrorStatusProvider used on opensource projects

Example 1 with HttpErrorStatusProvider

use of co.cask.cdap.api.common.HttpErrorStatusProvider in project cdap by caskdata.

the class DatasetInstanceService method get.

/**
   * Gets a dataset instance.
   *
   * @param instance instance to get
   * @param owners the {@link EntityId entities} that will be using the dataset instance
   * @return the dataset instance's {@link DatasetMeta}
   * @throws NotFoundException if either the namespace or dataset instance is not found,
   * @throws IOException if there is a problem in making an HTTP request to check if the namespace exists
   * @throws UnauthorizedException if perimeter security and authorization are enabled, and the current user does not
   *  have any privileges on the #instance
   */
DatasetMeta get(final DatasetId instance, List<? extends EntityId> owners) throws Exception {
    // Application Deployment first makes a call to the dataset service to check if the instance already exists with
    // a different type. To make sure that that call responds with the right exceptions if necessary, first fetch the
    // meta from the cache and throw appropriate exceptions if necessary.
    DatasetMeta datasetMeta;
    try {
        datasetMeta = metaCache.get(instance);
    } catch (ExecutionException e) {
        Throwable cause = e.getCause();
        if ((cause instanceof Exception) && (cause instanceof HttpErrorStatusProvider)) {
            throw (Exception) cause;
        }
        throw e;
    }
    // Only return the above datasetMeta if authorization succeeds
    ensureAccess(instance);
    return datasetMeta;
}