Example usage for com.amazonaws.services.elasticmapreduce.model ListClustersResult getMarker

Introduction

In this page you can find the example usage for com.amazonaws.services.elasticmapreduce.model ListClustersResult getMarker.

Prototype

public String getMarker() 

Source Link

Document

The pagination token that indicates the next set of results to retrieve.

Usage

From source file:org.finra.dm.dao.impl.EmrDaoImpl.java

License:Apache License

/**
 * Get an Active EMR cluster by the cluster name. Cluster only in following states are returned: ClusterState.BOOTSTRAPPING, ClusterState.RUNNING,
 * ClusterState.STARTING, ClusterState.WAITING
 *
 * @param awsParams AWS related parameters for access/secret keys and proxy details.
 * @param clusterName the cluster name value.
 *
 * @return the ClusterSummary object.//from   w  ww .java2s . co  m
 */
@Override
public ClusterSummary getActiveEmrClusterByName(String clusterName, AwsParamsDto awsParams) {
    if (StringUtils.isNotBlank(clusterName)) {
        /**
         * Call AWSOperations for ListClusters API. Need to list all the active clusters that are in
         * BOOTSTRAPPING/RUNNING/STARTING/WAITING states
         */
        ListClustersRequest listClustersRequest = new ListClustersRequest()
                .withClusterStates(getActiveEmrClusterStates());

        /**
         * ListClusterRequest returns only 50 clusters at a time. However, this returns a marker
         * that can be used for subsequent calls to listClusters to get all the clusters
         */
        String markerForListClusters = listClustersRequest.getMarker();

        // Loop through all the available clusters and look for the given cluster id
        do {
            /**
             * Call AWSOperations for ListClusters API.
             * Need to include the Marker returned by the previous iteration
             */
            ListClustersResult clusterResult = emrOperations.listEmrClusters(getEmrClient(awsParams),
                    listClustersRequest.withMarker(markerForListClusters));

            // Loop through all the active clusters returned by AWS
            for (ClusterSummary clusterInstance : clusterResult.getClusters()) {
                // If the cluster name matches, then return the status
                if (StringUtils.isNotBlank(clusterInstance.getName())
                        && clusterInstance.getName().equalsIgnoreCase(clusterName)) {
                    return clusterInstance;
                }
            }
            markerForListClusters = clusterResult.getMarker();
        } while (markerForListClusters != null);
    }

    return null;
}

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From source file:org.finra.herd.dao.impl.EmrDaoImpl.java

License:Apache License

@Override
public ClusterSummary getActiveEmrClusterByName(String clusterName, AwsParamsDto awsParams) {
    if (StringUtils.isNotBlank(clusterName)) {
        /**//w  w w.  jav a 2  s  .  c om
         * Call AWSOperations for ListClusters API. Need to list all the active clusters that are in
         * BOOTSTRAPPING/RUNNING/STARTING/WAITING states
         */
        ListClustersRequest listClustersRequest = new ListClustersRequest()
                .withClusterStates(getActiveEmrClusterStates());

        /**
         * ListClusterRequest returns only 50 clusters at a time. However, this returns a marker
         * that can be used for subsequent calls to listClusters to get all the clusters
         */
        String markerForListClusters = listClustersRequest.getMarker();

        // Loop through all the available clusters and look for the given cluster id
        do {
            /**
             * Call AWSOperations for ListClusters API.
             * Need to include the Marker returned by the previous iteration
             */
            ListClustersResult clusterResult = emrOperations.listEmrClusters(getEmrClient(awsParams),
                    listClustersRequest.withMarker(markerForListClusters));

            // Loop through all the active clusters returned by AWS
            for (ClusterSummary clusterInstance : clusterResult.getClusters()) {
                // If the cluster name matches, then return the status
                if (StringUtils.isNotBlank(clusterInstance.getName())
                        && clusterInstance.getName().equalsIgnoreCase(clusterName)) {
                    return clusterInstance;
                }
            }
            markerForListClusters = clusterResult.getMarker();
        } while (markerForListClusters != null);
    }

    return null;
}

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