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client.go
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client.go
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package natscluster
import (
"context"
"encoding/json"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/client-go/dynamic"
"github.com/nats-io/nats-operator/pkg/apis/nats/v1alpha2"
)
// Client represents a NATS client.
type Client struct {
client dynamic.Interface
}
// NewClient returns a new client instance.
func NewClient(client dynamic.Interface) *Client {
return &Client{client}
}
// Get returns a NatsCluster given its namespace and name.
func (c *Client) Get(ctx context.Context, namespace, name string) (*v1alpha2.NatsCluster, error) {
if obj, err := c.client.Resource(groupVersionResource()).Namespace(namespace).Get(ctx, name, metav1.GetOptions{}); err != nil {
return nil, err
} else {
return natsClusterFrom(obj)
}
}
// groupVersionResource returns a new NatsCluster GroupVersionResource instance.
func groupVersionResource() schema.GroupVersionResource {
return schema.GroupVersionResource{
Version: v1alpha2.SchemeGroupVersion.Version,
Group: v1alpha2.SchemeGroupVersion.Group,
Resource: v1alpha2.CRDResourcePlural,
}
}
// natsClusterFrom returns a new NatsCluster instance given the unstructured object.
func natsClusterFrom(obj *unstructured.Unstructured) (*v1alpha2.NatsCluster, error) {
data, err := obj.MarshalJSON()
if err != nil {
return nil, err
}
natsCluster := new(v1alpha2.NatsCluster)
if err = json.Unmarshal(data, natsCluster); err != nil {
return nil, err
}
return natsCluster, nil
}