Class/Object

com.datastax.spark.connector.cql

CassandraConnector

Related Docs: object CassandraConnector | package cql

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class CassandraConnector extends Serializable with Logging

Provides and manages connections to Cassandra.

A CassandraConnector instance is serializable and can be safely sent over network, because it automatically reestablishes the connection to the same cluster after deserialization. Internally it saves a list of all nodes in the cluster, so a connection can be established even if the host given in the initial config is down.

Multiple CassandraConnectors in the same JVM connected to the same Cassandra cluster will share a single underlying Cluster object. CassandraConnector will close the underlying Cluster object automatically whenever it is not used i.e. no Session or Cluster is open for longer than spark.cassandra.connection.keepAliveMS property value.

A CassandraConnector object is configured from CassandraConnectorConf object which can be either given explicitly or automatically configured from SparkConf. The connection options are:

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Logging, Serializable, Serializable, AnyRef, Any
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  1. CassandraConnector
  2. Logging
  3. Serializable
  4. Serializable
  5. AnyRef
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Instance Constructors

  1. new CassandraConnector(conf: CassandraConnectorConf)

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Value Members

  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any
  5. def authConf: AuthConf

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    Configured authentication options

  6. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  7. def closeResourceAfterUse[T, C <: AnyRef { def close(): Unit }](closeable: C)(code: (C) ⇒ T): T

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    Automatically closes resource after use.

    Automatically closes resource after use. Handy for closing streams, files, sessions etc. Similar to try-with-resources in Java 7.

  8. def closestLiveHost: Host

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    Returns the local node, if it is one of the cluster nodes.

    Returns the local node, if it is one of the cluster nodes. Otherwise returns any node.

  9. val conf: CassandraConnectorConf

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  10. def connectionFactory: CassandraConnectionFactory

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    Connection configurator

  11. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  12. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  13. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  14. final def getClass(): Class[_]

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    Definition Classes
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  15. def hashCode(): Int

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    Definition Classes
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  16. lazy val hosts: Set[InetAddress]

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    Known cluster hosts in the connected datacenter.

  17. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any
  18. def isTraceEnabled(): Boolean

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    Attributes
    protected
    Definition Classes
    Logging
  19. def jWithSessionDo[T](code: Function[Session, T]): T

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    Allows use of a Cassandra Session in a safe way without risk of forgetting to close it from java.

    Allows use of a Cassandra Session in a safe way without risk of forgetting to close it from java. See withSessionDo

    We should not need this in scala 2.12

  20. def log: Logger

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    Attributes
    protected
    Definition Classes
    Logging
  21. def logDebug(msg: ⇒ String, throwable: Throwable): Unit

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    Attributes
    protected
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    Logging
  22. def logDebug(msg: ⇒ String): Unit

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    Logging
  23. def logError(msg: ⇒ String, throwable: Throwable): Unit

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    Logging
  24. def logError(msg: ⇒ String): Unit

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    Logging
  25. def logInfo(msg: ⇒ String, throwable: Throwable): Unit

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    Logging
  26. def logInfo(msg: ⇒ String): Unit

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    Attributes
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    Logging
  27. def logName: String

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    Attributes
    protected
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    Logging
  28. def logTrace(msg: ⇒ String, throwable: Throwable): Unit

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    Attributes
    protected
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    Logging
  29. def logTrace(msg: ⇒ String): Unit

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    protected
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    Logging
  30. def logWarning(msg: ⇒ String, throwable: Throwable): Unit

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    Attributes
    protected
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    Logging
  31. def logWarning(msg: ⇒ String): Unit

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    Attributes
    protected
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    Logging
  32. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  33. final def notify(): Unit

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    Definition Classes
    AnyRef
  34. final def notifyAll(): Unit

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    Definition Classes
    AnyRef
  35. def openSession(): Session

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    Returns a shared session to Cassandra and increases the internal open reference counter.

    Returns a shared session to Cassandra and increases the internal open reference counter. It does not release the session automatically, so please remember to close it after use. Closing a shared session decreases the session reference counter. If the reference count drops to zero, the session may be physically closed.

  36. def port: Int

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    Configured native port

  37. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef
  38. def toString(): String

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    Definition Classes
    AnyRef → Any
  39. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  40. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
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    Annotations
    @throws( ... )
  41. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  42. def withClusterDo[T](code: (Cluster) ⇒ T): T

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    Allows to use Cassandra Cluster in a safe way without risk of forgetting to close it.

    Allows to use Cassandra Cluster in a safe way without risk of forgetting to close it. Multiple, concurrent calls might share the same Cluster. The Cluster will be closed when not in use for some time. It is not recommended to obtain sessions from this method. Use withSessionDo instead which allows for proper session sharing.

  43. def withSessionDo[T](code: (Session) ⇒ T): T

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    Allows to use Cassandra Session in a safe way without risk of forgetting to close it.

    Allows to use Cassandra Session in a safe way without risk of forgetting to close it. The Session object obtained through this method is a proxy to a shared, single Session associated with the cluster. Internally, the shared underlying Session will be closed shortly after all the proxies are closed.

Inherited from Logging

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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