CassandraIO.Read (Apache Beam 2.32.0)

java.lang.Object
- org.apache.beam.sdk.transforms.PTransform<PBegin,PCollection<T>>
- - org.apache.beam.sdk.io.cassandra.CassandraIO.Read<T>

All Implemented Interfaces:

java.io.Serializable, HasDisplayData

Enclosing class:

CassandraIO
```
public abstract static class CassandraIO.Read<T>
extends PTransform<PBegin,PCollection<T>>
```
A PTransform to read data from Apache Cassandra. See CassandraIO for more information on usage and configuration.

See Also:

Serialized Form

Field Summary
- Fields inherited from class org.apache.beam.sdk.transforms.PTransform
  name, resourceHints

Constructor Summary

Constructors
Constructor and Description

Read()

Constructors
Constructor and Description
`Read()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`PCollection<T>`	`expand(PBegin input)` Override this method to specify how this `PTransform` should be expanded on the given `InputT`.
`CassandraIO.Read<T>`	`withCoder(Coder<T> coder)` Specify the `Coder` used to serialize the entity in the `PCollection`.
`CassandraIO.Read<T>`	`withConnectTimeout(java.lang.Integer timeout)` Specify the Cassandra client connect timeout in ms.
`CassandraIO.Read<T>`	`withConnectTimeout(ValueProvider<java.lang.Integer> timeout)` Specify the Cassandra client connect timeout in ms.
`CassandraIO.Read<T>`	`withConsistencyLevel(java.lang.String consistencyLevel)` Specify the consistency level for the request (e.g.
`CassandraIO.Read<T>`	`withConsistencyLevel(ValueProvider<java.lang.String> consistencyLevel)` Specify the consistency level for the request (e.g.
`CassandraIO.Read<T>`	`withEntity(java.lang.Class<T> entity)` Specify the entity class (annotated POJO).
`CassandraIO.Read<T>`	`withHosts(java.util.List<java.lang.String> hosts)` Specify the hosts of the Apache Cassandra instances.
`CassandraIO.Read<T>`	`withHosts(ValueProvider<java.util.List<java.lang.String>> hosts)` Specify the hosts of the Apache Cassandra instances.
`CassandraIO.Read<T>`	`withKeyspace(java.lang.String keyspace)` Specify the Cassandra keyspace where to read data.
`CassandraIO.Read<T>`	`withKeyspace(ValueProvider<java.lang.String> keyspace)` Specify the Cassandra keyspace where to read data.
`CassandraIO.Read<T>`	`withLocalDc(java.lang.String localDc)` Specify the local DC used for the load balancing.
`CassandraIO.Read<T>`	`withLocalDc(ValueProvider<java.lang.String> localDc)` Specify the local DC used for the load balancing.
`CassandraIO.Read<T>`	`withMapperFactoryFn(SerializableFunction<Session,Mapper> mapperFactory)` A factory to create a specific `Mapper` for a given Cassandra Session.
`CassandraIO.Read<T>`	`withMinNumberOfSplits(java.lang.Integer minNumberOfSplits)` It's possible that system.size_estimates isn't populated or that the number of splits computed by Beam is still to low for Cassandra to handle it.
`CassandraIO.Read<T>`	`withMinNumberOfSplits(ValueProvider<java.lang.Integer> minNumberOfSplits)` It's possible that system.size_estimates isn't populated or that the number of splits computed by Beam is still to low for Cassandra to handle it.
`CassandraIO.Read<T>`	`withPassword(java.lang.String password)` Specify the password used for authentication.
`CassandraIO.Read<T>`	`withPassword(ValueProvider<java.lang.String> password)` Specify the password used for authentication.
`CassandraIO.Read<T>`	`withPort(int port)` Specify the port number of the Apache Cassandra instances.
`CassandraIO.Read<T>`	`withPort(ValueProvider<java.lang.Integer> port)` Specify the port number of the Apache Cassandra instances.
`CassandraIO.Read<T>`	`withQuery(java.lang.String query)` Specify the query to read data.
`CassandraIO.Read<T>`	`withQuery(ValueProvider<java.lang.String> query)` Specify the query to read data.
`CassandraIO.Read<T>`	`withReadTimeout(java.lang.Integer timeout)` Specify the Cassandra client read timeout in ms.
`CassandraIO.Read<T>`	`withReadTimeout(ValueProvider<java.lang.Integer> timeout)` Specify the Cassandra client read timeout in ms.
`CassandraIO.Read<T>`	`withTable(java.lang.String table)` Specify the Cassandra table where to read data.
`CassandraIO.Read<T>`	`withTable(ValueProvider<java.lang.String> table)` Specify the Cassandra table where to read data.
`CassandraIO.Read<T>`	`withUsername(java.lang.String username)` Specify the username for authentication.
`CassandraIO.Read<T>`	`withUsername(ValueProvider<java.lang.String> username)` Specify the username for authentication.

Methods inherited from class org.apache.beam.sdk.transforms.PTransform
compose, compose, getAdditionalInputs, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setResourceHints, toString, validate

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - Read
```
public Read()
```
- Method Detail
  - withHosts
```
public CassandraIO.Read<T> withHosts(java.util.List<java.lang.String> hosts)
```
    Specify the hosts of the Apache Cassandra instances.
  - withHosts
```
public CassandraIO.Read<T> withHosts(ValueProvider<java.util.List<java.lang.String>> hosts)
```
    Specify the hosts of the Apache Cassandra instances.
  - withPort
```
public CassandraIO.Read<T> withPort(int port)
```
    Specify the port number of the Apache Cassandra instances.
  - withPort
```
public CassandraIO.Read<T> withPort(ValueProvider<java.lang.Integer> port)
```
    Specify the port number of the Apache Cassandra instances.
  - withKeyspace
```
public CassandraIO.Read<T> withKeyspace(java.lang.String keyspace)
```
    Specify the Cassandra keyspace where to read data.
  - withKeyspace
```
public CassandraIO.Read<T> withKeyspace(ValueProvider<java.lang.String> keyspace)
```
    Specify the Cassandra keyspace where to read data.
  - withTable
```
public CassandraIO.Read<T> withTable(java.lang.String table)
```
    Specify the Cassandra table where to read data.
  - withTable
```
public CassandraIO.Read<T> withTable(ValueProvider<java.lang.String> table)
```
    Specify the Cassandra table where to read data.
  - withQuery
```
public CassandraIO.Read<T> withQuery(java.lang.String query)
```
    Specify the query to read data.
  - withQuery
```
public CassandraIO.Read<T> withQuery(ValueProvider<java.lang.String> query)
```
    Specify the query to read data.
  - withEntity
```
public CassandraIO.Read<T> withEntity(java.lang.Class<T> entity)
```
    Specify the entity class (annotated POJO). The CassandraIO will read the data and convert the data as entity instances. The PCollection resulting from the read will contains entity elements.
  - withCoder
```
public CassandraIO.Read<T> withCoder(Coder<T> coder)
```
    Specify the Coder used to serialize the entity in the PCollection.
  - withUsername
```
public CassandraIO.Read<T> withUsername(java.lang.String username)
```
    Specify the username for authentication.
  - withUsername
```
public CassandraIO.Read<T> withUsername(ValueProvider<java.lang.String> username)
```
    Specify the username for authentication.
  - withPassword
```
public CassandraIO.Read<T> withPassword(java.lang.String password)
```
    Specify the password used for authentication.
  - withPassword
```
public CassandraIO.Read<T> withPassword(ValueProvider<java.lang.String> password)
```
    Specify the password used for authentication.
  - withLocalDc
```
public CassandraIO.Read<T> withLocalDc(java.lang.String localDc)
```
    Specify the local DC used for the load balancing.
  - withLocalDc
```
public CassandraIO.Read<T> withLocalDc(ValueProvider<java.lang.String> localDc)
```
    Specify the local DC used for the load balancing.
  - withConsistencyLevel
```
public CassandraIO.Read<T> withConsistencyLevel(java.lang.String consistencyLevel)
```
    Specify the consistency level for the request (e.g. ONE, LOCAL_ONE, LOCAL_QUORUM, etc).
  - withConsistencyLevel
```
public CassandraIO.Read<T> withConsistencyLevel(ValueProvider<java.lang.String> consistencyLevel)
```
    Specify the consistency level for the request (e.g. ONE, LOCAL_ONE, LOCAL_QUORUM, etc).
  - withMinNumberOfSplits
```
public CassandraIO.Read<T> withMinNumberOfSplits(java.lang.Integer minNumberOfSplits)
```
    It's possible that system.size_estimates isn't populated or that the number of splits computed by Beam is still to low for Cassandra to handle it. This setting allows to enforce a minimum number of splits in case Beam cannot compute it correctly.
  - withMinNumberOfSplits
```
public CassandraIO.Read<T> withMinNumberOfSplits(ValueProvider<java.lang.Integer> minNumberOfSplits)
```
    It's possible that system.size_estimates isn't populated or that the number of splits computed by Beam is still to low for Cassandra to handle it. This setting allows to enforce a minimum number of splits in case Beam cannot compute it correctly.
  - withConnectTimeout
```
public CassandraIO.Read<T> withConnectTimeout(java.lang.Integer timeout)
```
    Specify the Cassandra client connect timeout in ms. See https://docs.datastax.com/en/drivers/java/3.8/com/datastax/driver/core/SocketOptions.html#setConnectTimeoutMillis-int-
  - withConnectTimeout
```
public CassandraIO.Read<T> withConnectTimeout(ValueProvider<java.lang.Integer> timeout)
```
    Specify the Cassandra client connect timeout in ms. See https://docs.datastax.com/en/drivers/java/3.8/com/datastax/driver/core/SocketOptions.html#setConnectTimeoutMillis-int-
  - withReadTimeout
```
public CassandraIO.Read<T> withReadTimeout(java.lang.Integer timeout)
```
    Specify the Cassandra client read timeout in ms. See https://docs.datastax.com/en/drivers/java/3.8/com/datastax/driver/core/SocketOptions.html#setReadTimeoutMillis-int-
  - withReadTimeout
```
public CassandraIO.Read<T> withReadTimeout(ValueProvider<java.lang.Integer> timeout)
```
    Specify the Cassandra client read timeout in ms. See https://docs.datastax.com/en/drivers/java/3.8/com/datastax/driver/core/SocketOptions.html#setReadTimeoutMillis-int-
  - withMapperFactoryFn
```
public CassandraIO.Read<T> withMapperFactoryFn(SerializableFunction<Session,Mapper> mapperFactory)
```
    A factory to create a specific Mapper for a given Cassandra Session. This is useful to provide mappers that don't rely in Cassandra annotated objects.
  - expand
```
public PCollection<T> expand(PBegin input)
```
    Description copied from class: PTransform
    
    Override this method to specify how this PTransform should be expanded on the given InputT.
    NOTE: This method should not be called directly. Instead apply the PTransform should be applied to the InputT using the apply method.
    Composite transforms, which are defined in terms of other transforms, should return the output of one of the composed transforms. Non-composite transforms, which do not apply any transforms internally, should return a new unbound output and register evaluators (via backend-specific registration methods).
    
    Specified by:
    
    expand in class PTransform<PBegin,PCollection<T>>

Class CassandraIO.Read<T>

Field Summary

Fields inherited from class org.apache.beam.sdk.transforms.PTransform

Constructor Summary

Method Summary

Methods inherited from class org.apache.beam.sdk.transforms.PTransform

Methods inherited from class java.lang.Object

Constructor Detail

Read

Method Detail

withHosts

withHosts

withPort

withPort

withKeyspace

withKeyspace

withTable

withTable

withQuery

withQuery

withEntity

withCoder

withUsername

withUsername

withPassword

withPassword

withLocalDc

withLocalDc

withConsistencyLevel

withConsistencyLevel

withMinNumberOfSplits

withMinNumberOfSplits

withConnectTimeout

withConnectTimeout

withReadTimeout

withReadTimeout

withMapperFactoryFn

expand