org.apache.cassandra.hadoop.cql3

Class CqlBulkOutputFormat

java.lang.Object

org.apache.hadoop.mapreduce.OutputFormat<K,V>

org.apache.cassandra.hadoop.AbstractBulkOutputFormat<java.lang.Object,java.util.List<java.nio.ByteBuffer>>

org.apache.cassandra.hadoop.cql3.CqlBulkOutputFormat

All Implemented Interfaces:

org.apache.hadoop.mapred.OutputFormat<java.lang.Object,java.util.List<java.nio.ByteBuffer>>

public class CqlBulkOutputFormat
extends AbstractBulkOutputFormat<java.lang.Object,java.util.List<java.nio.ByteBuffer>>

The CqlBulkOutputFormat acts as a Hadoop-specific OutputFormat that allows reduce tasks to store keys (and corresponding bound variable values) as CQL rows (and respective columns) in a given ColumnFamily.

As is the case with the org.apache.cassandra.hadoop.CqlOutputFormat, you need to set the prepared statement in your Hadoop job Configuration. The CqlConfigHelper class, through its ConfigHelper#setOutputPreparedStatement method, is provided to make this simple. you need to set the Keyspace. The ConfigHelper class, through its ConfigHelper.setOutputColumnFamily(org.apache.hadoop.conf.Configuration, java.lang.String) method, is provided to make this simple.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.hadoop.AbstractBulkOutputFormat

AbstractBulkOutputFormat.NullOutputCommitter

Constructor Summary

Constructors

Constructor and Description
CqlBulkOutputFormat()

Method Summary

Methods

Modifier and Type	Method and Description
static java.lang.String	getColumnFamilyInsertStatement(org.apache.hadoop.conf.Configuration conf, java.lang.String columnFamily)
static java.lang.String	getColumnFamilySchema(org.apache.hadoop.conf.Configuration conf, java.lang.String columnFamily)
static boolean	getDeleteSourceOnSuccess(org.apache.hadoop.conf.Configuration conf)
CqlBulkRecordWriter	getRecordWriter(org.apache.hadoop.fs.FileSystem filesystem, org.apache.hadoop.mapred.JobConf job, java.lang.String name, org.apache.hadoop.util.Progressable progress) Deprecated.
CqlBulkRecordWriter	getRecordWriter(org.apache.hadoop.mapreduce.TaskAttemptContext context) Get the RecordWriter for the given task.
static void	setColumnFamilyInsertStatement(org.apache.hadoop.conf.Configuration conf, java.lang.String columnFamily, java.lang.String insertStatement)
static void	setColumnFamilySchema(org.apache.hadoop.conf.Configuration conf, java.lang.String columnFamily, java.lang.String schema)
static void	setDeleteSourceOnSuccess(org.apache.hadoop.conf.Configuration conf, boolean deleteSrc)

Methods inherited from class org.apache.cassandra.hadoop.AbstractBulkOutputFormat

checkOutputSpecs, checkOutputSpecs, getOutputCommitter

Methods inherited from class java.lang.Object

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

Constructor Detail

CqlBulkOutputFormat

public CqlBulkOutputFormat()

Method Detail

getRecordWriter

@Deprecated
public CqlBulkRecordWriter getRecordWriter(org.apache.hadoop.fs.FileSystem filesystem,
                                             org.apache.hadoop.mapred.JobConf job,
                                             java.lang.String name,
                                             org.apache.hadoop.util.Progressable progress)
                                    throws java.io.IOException

Deprecated.

Fills the deprecated OutputFormat interface for streaming.

Throws:

java.io.IOException

getRecordWriter

public CqlBulkRecordWriter getRecordWriter(org.apache.hadoop.mapreduce.TaskAttemptContext context)
                                    throws java.io.IOException,
                                           java.lang.InterruptedException

Get the RecordWriter for the given task.

Specified by:

getRecordWriter in class org.apache.hadoop.mapreduce.OutputFormat<java.lang.Object,java.util.List<java.nio.ByteBuffer>>

Parameters:

context - the information about the current task.

Returns:

a RecordWriter to write the output for the job.

Throws:

java.io.IOException

java.lang.InterruptedException

setColumnFamilySchema

public static void setColumnFamilySchema(org.apache.hadoop.conf.Configuration conf,
                         java.lang.String columnFamily,
                         java.lang.String schema)

setColumnFamilyInsertStatement

public static void setColumnFamilyInsertStatement(org.apache.hadoop.conf.Configuration conf,
                                  java.lang.String columnFamily,
                                  java.lang.String insertStatement)

getColumnFamilySchema

public static java.lang.String getColumnFamilySchema(org.apache.hadoop.conf.Configuration conf,
                                     java.lang.String columnFamily)

getColumnFamilyInsertStatement

public static java.lang.String getColumnFamilyInsertStatement(org.apache.hadoop.conf.Configuration conf,
                                              java.lang.String columnFamily)

setDeleteSourceOnSuccess

public static void setDeleteSourceOnSuccess(org.apache.hadoop.conf.Configuration conf,
                            boolean deleteSrc)

getDeleteSourceOnSuccess

public static boolean getDeleteSourceOnSuccess(org.apache.hadoop.conf.Configuration conf)