org.apache.flink.streaming.connectors.cassandra

Class CassandraPojoSink<IN>

java.lang.Object

org.apache.flink.api.common.functions.AbstractRichFunction

org.apache.flink.streaming.api.functions.sink.RichSinkFunction<IN>

org.apache.flink.streaming.connectors.cassandra.CassandraSinkBase<IN,com.datastax.driver.core.ResultSet>

org.apache.flink.streaming.connectors.cassandra.CassandraPojoSink<IN>

Type Parameters:

IN - Type of the elements emitted by this sink

All Implemented Interfaces:

Serializable, Function, RichFunction, CheckpointedFunction, SinkFunction<IN>

public class CassandraPojoSink<IN>
extends CassandraSinkBase<IN,com.datastax.driver.core.ResultSet>

Flink Sink to save data into a Cassandra cluster using Mapper, which it uses annotations from com.datastax.driver.mapping.annotations.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.streaming.api.functions.sink.SinkFunction

SinkFunction.Context<T>

Field Summary

Fields

Modifier and Type	Field and Description
protected Class<IN>	clazz
protected com.datastax.driver.mapping.Mapper<IN>	mapper
protected com.datastax.driver.mapping.MappingManager	mappingManager

Fields inherited from class org.apache.flink.streaming.connectors.cassandra.CassandraSinkBase

callback, cluster, exception, log, session

Constructor Summary

Constructors

Constructor and Description
CassandraPojoSink(Class<IN> clazz, ClusterBuilder builder) The main constructor for creating CassandraPojoSink.
CassandraPojoSink(Class<IN> clazz, ClusterBuilder builder, MapperOptions options)
CassandraPojoSink(Class<IN> clazz, ClusterBuilder builder, MapperOptions options, String keyspace)
CassandraPojoSink(Class<IN> clazz, ClusterBuilder builder, String keyspace)

Method Summary

Modifier and Type	Method and Description
protected com.datastax.driver.core.Session	createSession()
void	open(Configuration configuration) Initialization method for the function.
com.google.common.util.concurrent.ListenableFuture<com.datastax.driver.core.ResultSet>	send(IN value)

Methods inherited from class org.apache.flink.streaming.connectors.cassandra.CassandraSinkBase

close, initializeState, invoke, snapshotState

Methods inherited from class org.apache.flink.api.common.functions.AbstractRichFunction

getIterationRuntimeContext, getRuntimeContext, setRuntimeContext

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.flink.streaming.api.functions.sink.SinkFunction

invoke

Field Detail

clazz

protected final Class<IN> clazz

mapper

protected transient com.datastax.driver.mapping.Mapper<IN> mapper

mappingManager

protected transient com.datastax.driver.mapping.MappingManager mappingManager

Constructor Detail

CassandraPojoSink

public CassandraPojoSink(Class<IN> clazz,
                         ClusterBuilder builder)

The main constructor for creating CassandraPojoSink.

Parameters:

clazz - Class instance

CassandraPojoSink

public CassandraPojoSink(Class<IN> clazz,
                         ClusterBuilder builder,
                         @Nullable
                         MapperOptions options)

CassandraPojoSink

public CassandraPojoSink(Class<IN> clazz,
                         ClusterBuilder builder,
                         String keyspace)

CassandraPojoSink

public CassandraPojoSink(Class<IN> clazz,
                         ClusterBuilder builder,
                         @Nullable
                         MapperOptions options,
                         String keyspace)

Method Detail

open

public void open(Configuration configuration)

Description copied from interface: RichFunction

Initialization method for the function. It is called before the actual working methods (like map or join) and thus suitable for one time setup work. For functions that are part of an iteration, this method will be invoked at the beginning of each iteration superstep.

The configuration object passed to the function can be used for configuration and initialization. The configuration contains all parameters that were configured on the function in the program composition.

 public class MyMapper extends FilterFunction<String> {

     private String searchString;

     public void open(Configuration parameters) {
         this.searchString = parameters.getString("foo");
     }

     public boolean filter(String value) {
         return value.equals(searchString);
     }
 }
 

By default, this method does nothing.

Specified by:

open in interface RichFunction

Overrides:

open in class CassandraSinkBase<IN,com.datastax.driver.core.ResultSet>

Parameters:

configuration - The configuration containing the parameters attached to the contract.

See Also:

Configuration

createSession

protected com.datastax.driver.core.Session createSession()

Overrides:

createSession in class CassandraSinkBase<IN,com.datastax.driver.core.ResultSet>

send

public com.google.common.util.concurrent.ListenableFuture<com.datastax.driver.core.ResultSet> send(IN value)

Specified by:

send in class CassandraSinkBase<IN,com.datastax.driver.core.ResultSet>