ekristen/aws-nuke

package resources

import (
    "context"

    "fmt"
    "strings"
    "time"

    "github.com/aws/aws-sdk-go/service/emr"

    "github.com/ekristen/libnuke/pkg/registry"
    "github.com/ekristen/libnuke/pkg/resource"
    "github.com/ekristen/libnuke/pkg/types"

    "github.com/ekristen/aws-nuke/v3/pkg/nuke"
)

const EMRClusterResource = "EMRCluster"

func init() {
    registry.Register(&registry.Registration{
        Name:     EMRClusterResource,
        Scope:    nuke.Account,
        Resource: &EMRCluster{},
        Lister:   &EMRClusterLister{},
    })
}

type EMRClusterLister struct{}

func (l *EMRClusterLister) List(_ context.Context, o interface{}) ([]resource.Resource, error) {
    opts := o.(*nuke.ListerOpts)

    svc := emr.New(opts.Session)
    resources := make([]resource.Resource, 0)

    params := &emr.ListClustersInput{}

    for {
        resp, err := svc.ListClusters(params)
        if err != nil {
            return nil, err
        }

        for _, cluster := range resp.Clusters {
            resources = append(resources, &EMRCluster{
                svc:     svc,
                cluster: cluster,
                state:   cluster.Status.State,
            })
        }

        if resp.Marker == nil {
            break
        }

        params.Marker = resp.Marker
    }

    return resources, nil
}

type EMRCluster struct {
    svc     *emr.EMR
    cluster *emr.ClusterSummary
    state   *string
}

func (f *EMRCluster) Filter() error {
    if strings.Contains(*f.state, "TERMINATED") {
        return fmt.Errorf("already terminated")
    }
    return nil
}

func (f *EMRCluster) Remove(_ context.Context) error {
    // Note: Call names are inconsistent in the SDK
    _, err := f.svc.TerminateJobFlows(&emr.TerminateJobFlowsInput{
        JobFlowIds: []*string{f.cluster.Id},
    })

    // Force nil return due to async callbacks blocking
    if err == nil {
        return nil
    }

    return err
}

func (f *EMRCluster) Properties() types.Properties {
    properties := types.NewProperties().
        Set("CreatedTime", f.cluster.Status.Timeline.CreationDateTime.Format(time.RFC3339))

    return properties
}

func (f *EMRCluster) String() string {
    return *f.cluster.Id
}