org.apache.cassandra.io.sstable

Class CQLSSTableWriter.Builder

java.lang.Object

org.apache.cassandra.io.sstable.CQLSSTableWriter.Builder

Enclosing class:

CQLSSTableWriter

public static class CQLSSTableWriter.Builder
extends java.lang.Object

A Builder for a CQLSSTableWriter object.

Method Summary

Methods

Modifier and Type	Method and Description
CQLSSTableWriter	build()
CQLSSTableWriter.Builder	forTable(java.lang.String schema) The schema (CREATE TABLE statement) for the table for which sstable are to be created.
CQLSSTableWriter.Builder	inDirectory(java.io.File directory) The directory where to write the sstables (mandatory option).
CQLSSTableWriter.Builder	inDirectory(java.lang.String directory) The directory where to write the sstables.
CQLSSTableWriter.Builder	sorted() Creates a CQLSSTableWriter that expects sorted inputs.
CQLSSTableWriter.Builder	using(java.lang.String insertStatement) The INSERT statement defining the order of the values to add for a given CQL row.
CQLSSTableWriter.Builder	withBufferSizeInMB(int size) The size of the buffer to use.
CQLSSTableWriter.Builder	withPartitioner(IPartitioner partitioner) The partitioner to use.

Methods inherited from class java.lang.Object

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

Method Detail

inDirectory

public CQLSSTableWriter.Builder inDirectory(java.lang.String directory)

The directory where to write the sstables.

This is a mandatory option.

Parameters:

directory - the directory to use, which should exists and be writable.

Returns:

this builder.

Throws:

java.lang.IllegalArgumentException - if directory doesn't exist or is not writable.

inDirectory

public CQLSSTableWriter.Builder inDirectory(java.io.File directory)

The directory where to write the sstables (mandatory option).

This is a mandatory option.

Parameters:

directory - the directory to use, which should exists and be writable.

Returns:

this builder.

Throws:

java.lang.IllegalArgumentException - if directory doesn't exist or is not writable.

forTable

public CQLSSTableWriter.Builder forTable(java.lang.String schema)

The schema (CREATE TABLE statement) for the table for which sstable are to be created.

Please note that the provided CREATE TABLE statement must use a fully-qualified table name, one that include the keyspace name.

This is a mandatory option.

Parameters:

schema - the schema of the table for which sstables are to be created.

Returns:

this builder.

Throws:

java.lang.IllegalArgumentException - if schema is not a valid CREATE TABLE statement or does not have a fully-qualified table name.

withPartitioner

public CQLSSTableWriter.Builder withPartitioner(IPartitioner partitioner)

The partitioner to use.

By default, Murmur3Partitioner will be used. If this is not the partitioner used by the cluster for which the SSTables are created, you need to use this method to provide the correct partitioner.

Parameters:

partitioner - the partitioner to use.

Returns:

this builder.

using

public CQLSSTableWriter.Builder using(java.lang.String insertStatement)

The INSERT statement defining the order of the values to add for a given CQL row.

Please note that the provided INSERT statement must use a fully-qualified table name, one that include the keyspace name. Morewover, said statement must use bind variables since it is those bind variables that will be bound to values by the resulting writer.

This is a mandatory option, and this needs to be called after foTable().

Parameters:

insertStatement - an insertion statement that defines the order of column values to use.

Returns:

this builder.

Throws:

java.lang.IllegalArgumentException - if insertStatement is not a valid insertion statement, does not have a fully-qualified table name or have no bind variables.

withBufferSizeInMB

public CQLSSTableWriter.Builder withBufferSizeInMB(int size)

The size of the buffer to use.

This defines how much data will be buffered before being written as a new SSTable. This correspond roughly to the data size that will have the created sstable.

The default is 128MB, which should be reasonable for a 1GB heap. If you experience OOM while using the writer, you should lower this value.

Parameters:

size - the size to use in MB.

Returns:

this builder.

sorted

public CQLSSTableWriter.Builder sorted()

Creates a CQLSSTableWriter that expects sorted inputs.

If this option is used, the resulting writer will expect rows to be added in SSTable sorted order (and an exception will be thrown if that is not the case during insertion). The SSTable sorted order means that rows are added such that their partition key respect the partitioner order and for a given partition, that the rows respect the clustering columns order.

You should thus only use this option is you know that you can provide the rows in order, which is rarely the case. If you can provide the rows in order however, using this sorted might be more efficient.

Note that if used, some option like withBufferSizeInMB will be ignored.

Returns:

this builder.

build

public CQLSSTableWriter build()