Examples with EmrClusterAlternateKeyDto org.finra.herd.model.dto.EmrClusterAlternateKeyDto used on opensource projects

Example 21 with EmrClusterAlternateKeyDto

use of org.finra.herd.model.dto.EmrClusterAlternateKeyDto in project herd by FINRAOS.

the class EmrServiceImpl method createClusterImpl.

/**
 * <p> Creates a new EMR cluster based on the given request if the cluster with the given name does not already exist. If the cluster already exist, returns
 * the information about the existing cluster. </p> <p> The request must contain: </p> <ul> <li>A namespace and definition name which refer to an existing
 * EMR cluster definition.</li> <li>A valid cluster name to create.</li> </ul> <p> The request may optionally contain: </p> <ul> <li>A "dry run" flag, which
 * when set to {@code true}, no calls to AWS will occur, but validations and override will. Defaults to {@code false}.</li> <li>An override parameter, which
 * when set, overrides the given parameters in the cluster definition before creating the cluster. Defaults to no override. </li> </ul> <p> A successful
 * response will contain: </p> <ul> <li>The ID of the cluster that was created, or if the cluster already exists, the ID of the cluster that exists. This
 * field will be {@code null} when dry run flag is {@code true}.</li> <li>The status of the cluster that was created or already exists. The status will
 * normally be "Starting" on successful creations. This field will be {@code null} when dry run flag is {@code true}</li> <li>The namespace, definition
 * name, and cluster name of the cluster.</li> <li>The dry run flag, if given in the request.</li> <li>An indicator whether the cluster was created or not.
 * If the cluster already exists, the cluster will not be created and this flag will be set to {@code false}.</li> <li>The definition which was used to
 * create the cluster. If any overrides were given, this definition's values will be the values after the override. This field will be {@code null} if the
 * cluster was not created.</li> </ul> <p> Notes: </p> <ul> <li>At any point of the execution, if there are validation errors, the method will immediately
 * throw an exception.</li> <li>Even if the validations pass, AWS may still reject the request, which will cause this method to throw an exception.</li>
 * <li>Dry runs do not make any calls to AWS, therefore AWS may still reject the creation request even when a dry run succeeds.</li> </ul>
 *
 * @param request - {@link EmrClusterCreateRequest} The EMR cluster create request
 *
 * @return {@link EmrCluster} the created EMR cluster object
 * @throws Exception when the original EMR cluster definition XML is malformed
 */
protected EmrCluster createClusterImpl(EmrClusterCreateRequest request) throws Exception {
    // Extract EMR cluster alternate key from the create request.
    EmrClusterAlternateKeyDto emrClusterAlternateKeyDto = getEmrClusterAlternateKey(request);
    // Perform the request validation.
    validateEmrClusterKey(emrClusterAlternateKeyDto);
    // Get the namespace and ensure it exists.
    NamespaceEntity namespaceEntity = namespaceDaoHelper.getNamespaceEntity(emrClusterAlternateKeyDto.getNamespace());
    // Get the EMR cluster definition and ensure it exists.
    EmrClusterDefinitionEntity emrClusterDefinitionEntity = emrClusterDefinitionDaoHelper.getEmrClusterDefinitionEntity(emrClusterAlternateKeyDto.getNamespace(), emrClusterAlternateKeyDto.getEmrClusterDefinitionName());
    // Replace all S3 managed location variables in xml
    String toReplace = getS3ManagedReplaceString();
    String replacedConfigXml = emrClusterDefinitionEntity.getConfiguration().replaceAll(toReplace, emrHelper.getS3StagingLocation());
    // Unmarshal definition xml into JAXB object.
    EmrClusterDefinition emrClusterDefinition = xmlHelper.unmarshallXmlToObject(EmrClusterDefinition.class, replacedConfigXml);
    // Perform override if override is set.
    overrideEmrClusterDefinition(emrClusterDefinition, request.getEmrClusterDefinitionOverride());
    // Perform the EMR cluster definition configuration validation.
    emrClusterDefinitionHelper.validateEmrClusterDefinitionConfiguration(emrClusterDefinition);
    // Check permissions.
    namespaceIamRoleAuthorizationHelper.checkPermissions(emrClusterDefinitionEntity.getNamespace(), emrClusterDefinition.getServiceIamRole(), emrClusterDefinition.getEc2NodeIamProfileName());
    AwsParamsDto awsParamsDto = emrHelper.getAwsParamsDtoByAcccountId(emrClusterDefinition.getAccountId());
    // If instance group definitions are specified, find best price and update definition.
    if (!emrHelper.isInstanceDefinitionsEmpty(emrClusterDefinition.getInstanceDefinitions())) {
        emrPricingHelper.updateEmrClusterDefinitionWithBestPrice(emrClusterAlternateKeyDto, emrClusterDefinition, awsParamsDto);
    }
    // The cluster ID record.
    String clusterId = null;
    String emrClusterStatus = null;
    String accountId = emrClusterDefinition.getAccountId();
    // Was cluster created?
    Boolean emrClusterCreated = null;
    // If the dryRun flag is null or false. This is the default option if no flag is given.
    if (!Boolean.TRUE.equals(request.isDryRun())) {
        /*
             * Create the cluster only if the cluster does not already exist.
             * If the cluster is created, record the newly created cluster ID.
             * If the cluster already exists, record the existing cluster ID.
             * If there is any error while attempting to check for existing cluster or create a new one, handle the exception to throw appropriate exception.
             */
        String clusterName = emrHelper.buildEmrClusterName(namespaceEntity.getCode(), emrClusterDefinitionEntity.getName(), emrClusterAlternateKeyDto.getEmrClusterName());
        try {
            // Try to get an active EMR cluster by its name.
            ClusterSummary clusterSummary = emrDao.getActiveEmrClusterByName(clusterName, awsParamsDto);
            // If cluster does not already exist.
            if (clusterSummary == null) {
                clusterId = emrDao.createEmrCluster(clusterName, emrClusterDefinition, awsParamsDto);
                emrClusterCreated = true;
                EmrClusterCreationLogEntity emrClusterCreationLogEntity = new EmrClusterCreationLogEntity();
                emrClusterCreationLogEntity.setNamespace(emrClusterDefinitionEntity.getNamespace());
                emrClusterCreationLogEntity.setEmrClusterDefinitionName(emrClusterDefinitionEntity.getName());
                emrClusterCreationLogEntity.setEmrClusterName(emrClusterAlternateKeyDto.getEmrClusterName());
                emrClusterCreationLogEntity.setEmrClusterId(clusterId);
                emrClusterCreationLogEntity.setEmrClusterDefinition(xmlHelper.objectToXml(emrClusterDefinition));
                herdDao.saveAndRefresh(emrClusterCreationLogEntity);
            } else // If the cluster already exist.
            {
                clusterId = clusterSummary.getId();
                emrClusterCreated = false;
                // Do not include definition in response
                emrClusterDefinition = null;
            }
            emrClusterStatus = emrDao.getEmrClusterStatusById(clusterId, awsParamsDto);
        } catch (AmazonServiceException ex) {
            handleAmazonException(ex, "An Amazon exception occurred while creating EMR cluster with name \"" + clusterName + "\".");
        }
    } else // If the dryRun flag is true and not null
    {
        emrClusterCreated = false;
    }
    return createEmrClusterFromRequest(clusterId, namespaceEntity.getCode(), emrClusterDefinitionEntity.getName(), emrClusterAlternateKeyDto.getEmrClusterName(), accountId, emrClusterStatus, emrClusterCreated, request.isDryRun(), emrClusterDefinition);
}