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Signed-off-by: Sabbir <sabbir@appscode.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| package cassandra | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "log" | ||
|
|
||
| "k8s.io/klog/v2" | ||
| health "kmodules.xyz/client-go/tools/healthchecker" | ||
|
|
||
| "github.com/gocql/gocql" | ||
| ) | ||
|
|
||
| type Client struct { | ||
| *gocql.Session | ||
| } | ||
|
|
||
| // CreateKeyspace creates a keyspace | ||
| func (c *Client) CreateKeyspace() error { | ||
| return c.Query(`CREATE KEYSPACE IF NOT EXISTS mykeyspace WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '2'}`).Exec() | ||
| } | ||
|
|
||
| // CreateTable creates a table | ||
| func (c *Client) CreateTable() error { | ||
| return c.Query(`CREATE TABLE IF NOT EXISTS mykeyspace.users ( | ||
| id UUID PRIMARY KEY, | ||
| name TEXT, | ||
| age INT, | ||
| email TEXT | ||
| )`).Exec() | ||
| } | ||
|
|
||
| // InsertUser inserts a user into the table | ||
| func (c *Client) InsertUser(id gocql.UUID, name string, age int, email string) error { | ||
| return c.Query(`INSERT INTO mykeyspace.users (id, name, age, email) VALUES (?, ?, ?, ?)`, | ||
| id, name, age, email).Exec() | ||
| } | ||
|
|
||
| func (c *Client) DeleteUser(id gocql.UUID) error { | ||
| return c.Query(`DELETE FROM mykeyspace.users WHERE id = ?`, id).Exec() | ||
| } | ||
|
|
||
| // QueryUser queries a user by ID | ||
| func (c *Client) QueryUser(id gocql.UUID) (string, int, string, error) { | ||
| var name string | ||
| var age int | ||
| var email string | ||
|
|
||
| iter := c.Query(`SELECT name, age, email FROM mykeyspace.users WHERE id = ?`, id).Iter() | ||
| if iter.Scan(&name, &age, &email) { | ||
| if err := iter.Close(); err != nil { | ||
| return "", 0, "", fmt.Errorf("unable to query data: %v", err) | ||
| } | ||
| return name, age, email, nil | ||
| } | ||
| return "", 0, "", fmt.Errorf("no data found") | ||
| } | ||
|
|
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| func (c *Client) CheckDbReadWrite() error { | ||
| if err := c.CreateKeyspace(); err != nil { | ||
| log.Fatal("Unable to create keyspace:", err) | ||
| } | ||
| if err := c.CreateTable(); err != nil { | ||
| log.Fatal("Unable to create table:", err) | ||
| } | ||
| id := gocql.TimeUUID() | ||
| if err := c.InsertUser(id, "John Doe", 30, "john.doe@example.com"); err != nil { | ||
| log.Fatal("Unable to insert data:", err) | ||
| } | ||
|
|
||
| name, age, email, err := c.QueryUser(id) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| klog.Infoln("DB Read Write Successful") | ||
| fmt.Printf("Name: %s, Age: %d, Email: %s\n", name, age, email) | ||
| err = c.DeleteUser(id) | ||
| return err | ||
| } | ||
|
|
||
| func (c *Client) PingCassandra() error { | ||
| query := c.Query("SELECT now() FROM system.local") | ||
| if err := query.Exec(); err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (c *Client) CloseCassandraClient(hcf *health.HealthCard) { | ||
| if c != nil { | ||
| c.Close() | ||
| } | ||
| hcf.ClientClosed() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| package cassandra | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
|
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| core "k8s.io/api/core/v1" | ||
| kerr "k8s.io/apimachinery/pkg/api/errors" | ||
| "k8s.io/apimachinery/pkg/types" | ||
| "k8s.io/klog/v2" | ||
| "kubedb.dev/apimachinery/apis/kubedb" | ||
|
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| "github.com/gocql/gocql" | ||
| api "kubedb.dev/apimachinery/apis/kubedb/v1alpha2" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| ) | ||
|
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||
| type KubeDBClientBuilder struct { | ||
| kc client.Client | ||
| db *api.Cassandra | ||
| url string | ||
| port *int | ||
| ctx context.Context | ||
| } | ||
|
|
||
| func NewKubeDBClientBuilder(kc client.Client, db *api.Cassandra) *KubeDBClientBuilder { | ||
| return &KubeDBClientBuilder{ | ||
| kc: kc, | ||
| db: db, | ||
| } | ||
| } | ||
|
|
||
| func (o *KubeDBClientBuilder) WithURL(url string) *KubeDBClientBuilder { | ||
| o.url = url | ||
| return o | ||
| } | ||
|
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| func (o *KubeDBClientBuilder) WithPort(port *int) *KubeDBClientBuilder { | ||
| o.port = port | ||
| return o | ||
| } | ||
|
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| func (o *KubeDBClientBuilder) WithContext(ctx context.Context) *KubeDBClientBuilder { | ||
| o.ctx = ctx | ||
| return o | ||
| } | ||
| func (o *KubeDBClientBuilder) GetCassandraClient(dns string) (*Client, error) { | ||
| host := dns | ||
| cluster := gocql.NewCluster(host) | ||
| cluster.Port = kubedb.CassandraNativeTcpPort | ||
| cluster.Keyspace = "system" | ||
| if o.db.Spec.Topology == nil { | ||
| cluster.Consistency = gocql.One | ||
| } else { | ||
| cluster.Consistency = gocql.Quorum | ||
| } | ||
| if !o.db.Spec.DisableSecurity { | ||
| if o.db.Spec.AuthSecret == nil { | ||
| klog.Error("AuthSecret not set") | ||
| return nil, errors.New("auth-secret is not set") | ||
| } | ||
|
|
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| authSecret := &core.Secret{} | ||
| err := o.kc.Get(o.ctx, types.NamespacedName{ | ||
| Namespace: o.db.Namespace, | ||
| Name: o.db.Spec.AuthSecret.Name, | ||
| }, authSecret) | ||
| if err != nil { | ||
| if kerr.IsNotFound(err) { | ||
| klog.Error(err, "AuthSecret not found") | ||
| return nil, errors.New("auth-secret not found") | ||
| } | ||
| return nil, err | ||
| } | ||
| userName := string(authSecret.Data[core.BasicAuthUsernameKey]) | ||
| password := string(authSecret.Data[core.BasicAuthPasswordKey]) | ||
| cluster.Authenticator = gocql.PasswordAuthenticator{ | ||
| Username: userName, | ||
| Password: password, | ||
| } | ||
| } | ||
| session, err := cluster.CreateSession() | ||
| if err != nil { | ||
| return nil, fmt.Errorf("unable to connect to Cassandra cluster: %v", err) | ||
| } | ||
|
|
||
| return &Client{session}, nil | ||
| } |
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