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## org.apache.cassandra.hadoop
Class ConfigHelper

    java.lang.Object
      org.apache.cassandra.hadoop.ConfigHelper

    public class ConfigHelper

extends java.lang.Object

Constructor Summary
`ConfigHelper()`

Method Summary
`static Cassandra.Client` | `createConnection(org.apache.hadoop.conf.Configuration conf, java.lang.String host, java.lang.Integer port)`
`static Cassandra.Client` | `getClientFromInputAddressList(org.apache.hadoop.conf.Configuration conf)`
`static Cassandra.Client` | `getClientFromOutputAddressList(org.apache.hadoop.conf.Configuration conf)`
`static java.lang.String` | `getInputColumnFamily(org.apache.hadoop.conf.Configuration conf)`
`static java.lang.String` | `getInputInitialAddress(org.apache.hadoop.conf.Configuration conf)`
`static boolean` | `getInputIsWide(org.apache.hadoop.conf.Configuration conf)`
`static KeyRange` | `getInputKeyRange(org.apache.hadoop.conf.Configuration conf)` may be null if unset
`static java.lang.String` | `getInputKeyspace(org.apache.hadoop.conf.Configuration conf)`
`static java.lang.String` | `getInputKeyspacePassword(org.apache.hadoop.conf.Configuration conf)`
`static java.lang.String` | `getInputKeyspaceUserName(org.apache.hadoop.conf.Configuration conf)`
`static IPartitioner` | `getInputPartitioner(org.apache.hadoop.conf.Configuration conf)`
`static int` | `getInputRpcPort(org.apache.hadoop.conf.Configuration conf)`
`static SlicePredicate` | `getInputSlicePredicate(org.apache.hadoop.conf.Configuration conf)`
`static int` | `getInputSplitSize(org.apache.hadoop.conf.Configuration conf)`
`static ITransportFactory` | `getInputTransportFactory(org.apache.hadoop.conf.Configuration conf)`
`static java.lang.String` | `getOutputColumnFamily(org.apache.hadoop.conf.Configuration conf)`
`static java.lang.String` | `getOutputCompressionChunkLength(org.apache.hadoop.conf.Configuration conf)`
`static java.lang.String` | `getOutputCompressionClass(org.apache.hadoop.conf.Configuration conf)`
`static CompressionParameters` | `getOutputCompressionParamaters(org.apache.hadoop.conf.Configuration conf)`
`static java.lang.String` | `getOutputInitialAddress(org.apache.hadoop.conf.Configuration conf)`
`static java.lang.String` | `getOutputKeyspace(org.apache.hadoop.conf.Configuration conf)`
`static java.lang.String` | `getOutputKeyspacePassword(org.apache.hadoop.conf.Configuration conf)`
`static java.lang.String` | `getOutputKeyspaceUserName(org.apache.hadoop.conf.Configuration conf)`
`static IPartitioner` | `getOutputPartitioner(org.apache.hadoop.conf.Configuration conf)`
`static int` | `getOutputRpcPort(org.apache.hadoop.conf.Configuration conf)`
`static ITransportFactory` | `getOutputTransportFactory(org.apache.hadoop.conf.Configuration conf)`
`static int` | `getRangeBatchSize(org.apache.hadoop.conf.Configuration conf)` The number of rows to request with each get range slices request.
`static java.lang.String` | `getReadConsistencyLevel(org.apache.hadoop.conf.Configuration conf)`
`static int` | `getThriftFramedTransportSize(org.apache.hadoop.conf.Configuration conf)`
`static int` | `getThriftMaxMessageLength(org.apache.hadoop.conf.Configuration conf)`
`static java.lang.String` | `getWriteConsistencyLevel(org.apache.hadoop.conf.Configuration conf)`
`static void` | `setInputColumnFamily(org.apache.hadoop.conf.Configuration conf, java.lang.String keyspace, java.lang.String columnFamily)` Set the keyspace and column family for the input of this job.
`static void` | `setInputColumnFamily(org.apache.hadoop.conf.Configuration conf, java.lang.String keyspace, java.lang.String columnFamily, boolean widerows)` Set the keyspace and column family for the input of this job.
`static void` | `setInputInitialAddress(org.apache.hadoop.conf.Configuration conf, java.lang.String address)`
`static void` | `setInputKeyspacePassword(org.apache.hadoop.conf.Configuration conf, java.lang.String password)`
`static void` | `setInputKeyspaceUserName(org.apache.hadoop.conf.Configuration conf, java.lang.String username)`
`static void` | `setInputKeyspaceUserNameAndPassword(org.apache.hadoop.conf.Configuration conf, java.lang.String username, java.lang.String password)`
`static void` | `setInputPartitioner(org.apache.hadoop.conf.Configuration conf, java.lang.String classname)`
`static void` | `setInputRange(org.apache.hadoop.conf.Configuration conf, java.util.List<IndexExpression> filter)` Set the KeyRange to limit the rows.
`static void` | `setInputRange(org.apache.hadoop.conf.Configuration conf, java.lang.String startToken, java.lang.String endToken)` Set the KeyRange to limit the rows.
`static void` | `setInputRange(org.apache.hadoop.conf.Configuration conf, java.lang.String startToken, java.lang.String endToken, java.util.List<IndexExpression> filter)` Set the KeyRange to limit the rows.
`static void` | `setInputRpcPort(org.apache.hadoop.conf.Configuration conf, java.lang.String port)`
`static void` | `setInputSlicePredicate(org.apache.hadoop.conf.Configuration conf, SlicePredicate predicate)` Set the predicate that determines what columns will be selected from each row.
`static void` | `setInputSplitSize(org.apache.hadoop.conf.Configuration conf, int splitsize)` Set the size of the input split.
`static void` | `setInputTransportFactoryClass(org.apache.hadoop.conf.Configuration conf, java.lang.String classname)`
`static void` | `setOutputColumnFamily(org.apache.hadoop.conf.Configuration conf, java.lang.String keyspace, java.lang.String columnFamily)` Set the keyspace and column family for the output of this job.
`static void` | `setOutputCompressionChunkLength(org.apache.hadoop.conf.Configuration conf, java.lang.String length)`
`static void` | `setOutputCompressionClass(org.apache.hadoop.conf.Configuration conf, java.lang.String classname)`
`static void` | `setOutputInitialAddress(org.apache.hadoop.conf.Configuration conf, java.lang.String address)`
`static void` | `setOutputKeyspacePassword(org.apache.hadoop.conf.Configuration conf, java.lang.String password)`
`static void` | `setOutputKeyspaceUserName(org.apache.hadoop.conf.Configuration conf, java.lang.String username)`
`static void` | `setOutputKeyspaceUserNameAndPassword(org.apache.hadoop.conf.Configuration conf, java.lang.String username, java.lang.String password)`
`static void` | `setOutputPartitioner(org.apache.hadoop.conf.Configuration conf, java.lang.String classname)`
`static void` | `setOutputRpcPort(org.apache.hadoop.conf.Configuration conf, java.lang.String port)`
`static void` | `setOutputTransportFactoryClass(org.apache.hadoop.conf.Configuration conf, java.lang.String classname)`
`static void` | `setRangeBatchSize(org.apache.hadoop.conf.Configuration conf, int batchsize)` The number of rows to request with each get range slices request.
`static void` | `setThriftFramedTransportSizeInMb(org.apache.hadoop.conf.Configuration conf, int frameSizeInMB)`
`static void` | `setThriftMaxMessageLengthInMb(org.apache.hadoop.conf.Configuration conf, int maxMessageSizeInMB)`

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

Constructor Detail

### ConfigHelper

    public ConfigHelper()

Method Detail

### setInputColumnFamily

    public static void setInputColumnFamily(org.apache.hadoop.conf.Configuration conf,
                                            java.lang.String keyspace,
                                            java.lang.String columnFamily,
                                            boolean widerows)

  Set the keyspace and column family for the input of this job.

  Parameters:
    `conf` - Job configuration you are about to run
    `keyspace` -
    `columnFamily` -
    `widerows` -

### setInputColumnFamily

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

  Set the keyspace and column family for the input of this job.

  Parameters:
    `conf` - Job configuration you are about to run
    `keyspace` -
    `columnFamily` -

### setOutputColumnFamily

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

  Set the keyspace and column family for the output of this job.

  Parameters:
    `conf` - Job configuration you are about to run
    `keyspace` -
    `columnFamily` -

### setRangeBatchSize

    public static void setRangeBatchSize(org.apache.hadoop.conf.Configuration conf,
                                         int batchsize)

  The number of rows to request with each get range slices request. Too big and you can either get timeouts when it takes Cassandra too long to fetch all the data. Too small and the performance will be eaten up by the overhead of each request.

  Parameters:
    `conf` - Job configuration you are about to run
    `batchsize` - Number of rows to request each time

### getRangeBatchSize

    public static int getRangeBatchSize(org.apache.hadoop.conf.Configuration conf)

  The number of rows to request with each get range slices request. Too big and you can either get timeouts when it takes Cassandra too long to fetch all the data. Too small and the performance will be eaten up by the overhead of each request.

  Parameters:
    `conf` - Job configuration you are about to run
  Returns:
    Number of rows to request each time

### setInputSplitSize

    public static void setInputSplitSize(org.apache.hadoop.conf.Configuration conf,
                                         int splitsize)

  Set the size of the input split. This affects the number of maps created, if the number is too small the overhead of each map will take up the bulk of the job time.

  Parameters:
    `conf` - Job configuration you are about to run
    `splitsize` - Size of the input split

### getInputSplitSize

    public static int getInputSplitSize(org.apache.hadoop.conf.Configuration conf)

### setInputSlicePredicate

    public static void setInputSlicePredicate(org.apache.hadoop.conf.Configuration conf,
                                              SlicePredicate predicate)

  Set the predicate that determines what columns will be selected from each row.

  Parameters:
    `conf` - Job configuration you are about to run
    `predicate` -

### getInputSlicePredicate

    public static SlicePredicate getInputSlicePredicate(org.apache.hadoop.conf.Configuration conf)

### setInputRange

    public static void setInputRange(org.apache.hadoop.conf.Configuration conf,
                                     java.lang.String startToken,
                                     java.lang.String endToken)

  Set the KeyRange to limit the rows.

  Parameters:
    `conf` - Job configuration you are about to run

### setInputRange

    public static void setInputRange(org.apache.hadoop.conf.Configuration conf,
                                     java.lang.String startToken,
                                     java.lang.String endToken,
                                     java.util.List<IndexExpression> filter)

  Set the KeyRange to limit the rows.

  Parameters:
    `conf` - Job configuration you are about to run

### setInputRange

    public static void setInputRange(org.apache.hadoop.conf.Configuration conf,
                                     java.util.List<IndexExpression> filter)

  Set the KeyRange to limit the rows.

  Parameters:
    `conf` - Job configuration you are about to run

### getInputKeyRange

    public static KeyRange getInputKeyRange(org.apache.hadoop.conf.Configuration conf)

  may be null if unset

### getInputKeyspace

    public static java.lang.String getInputKeyspace(org.apache.hadoop.conf.Configuration conf)

### getOutputKeyspace

    public static java.lang.String getOutputKeyspace(org.apache.hadoop.conf.Configuration conf)

### setInputKeyspaceUserNameAndPassword

    public static void setInputKeyspaceUserNameAndPassword(org.apache.hadoop.conf.Configuration conf,
                                                           java.lang.String username,
                                                           java.lang.String password)

### setInputKeyspaceUserName

    public static void setInputKeyspaceUserName(org.apache.hadoop.conf.Configuration conf,
                                                java.lang.String username)

### getInputKeyspaceUserName

    public static java.lang.String getInputKeyspaceUserName(org.apache.hadoop.conf.Configuration conf)

### setInputKeyspacePassword

    public static void setInputKeyspacePassword(org.apache.hadoop.conf.Configuration conf,
                                                java.lang.String password)

### getInputKeyspacePassword

    public static java.lang.String getInputKeyspacePassword(org.apache.hadoop.conf.Configuration conf)

### setOutputKeyspaceUserNameAndPassword

    public static void setOutputKeyspaceUserNameAndPassword(org.apache.hadoop.conf.Configuration conf,
                                                            java.lang.String username,
                                                            java.lang.String password)

### setOutputKeyspaceUserName

    public static void setOutputKeyspaceUserName(org.apache.hadoop.conf.Configuration conf,
                                                 java.lang.String username)

### getOutputKeyspaceUserName

    public static java.lang.String getOutputKeyspaceUserName(org.apache.hadoop.conf.Configuration conf)

### setOutputKeyspacePassword

    public static void setOutputKeyspacePassword(org.apache.hadoop.conf.Configuration conf,
                                                 java.lang.String password)

### getOutputKeyspacePassword

    public static java.lang.String getOutputKeyspacePassword(org.apache.hadoop.conf.Configuration conf)

### getInputColumnFamily

    public static java.lang.String getInputColumnFamily(org.apache.hadoop.conf.Configuration conf)

### getInputIsWide

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

### getOutputColumnFamily

    public static java.lang.String getOutputColumnFamily(org.apache.hadoop.conf.Configuration conf)

### getReadConsistencyLevel

    public static java.lang.String getReadConsistencyLevel(org.apache.hadoop.conf.Configuration conf)

### getWriteConsistencyLevel

    public static java.lang.String getWriteConsistencyLevel(org.apache.hadoop.conf.Configuration conf)

### getInputRpcPort

    public static int getInputRpcPort(org.apache.hadoop.conf.Configuration conf)

### setInputRpcPort

    public static void setInputRpcPort(org.apache.hadoop.conf.Configuration conf,
                                       java.lang.String port)

### getInputInitialAddress

    public static java.lang.String getInputInitialAddress(org.apache.hadoop.conf.Configuration conf)

### setInputInitialAddress

    public static void setInputInitialAddress(org.apache.hadoop.conf.Configuration conf,
                                              java.lang.String address)

### setInputPartitioner

    public static void setInputPartitioner(org.apache.hadoop.conf.Configuration conf,
                                           java.lang.String classname)

### getInputPartitioner

    public static IPartitioner getInputPartitioner(org.apache.hadoop.conf.Configuration conf)

### getOutputRpcPort

    public static int getOutputRpcPort(org.apache.hadoop.conf.Configuration conf)

### setOutputRpcPort

    public static void setOutputRpcPort(org.apache.hadoop.conf.Configuration conf,
                                        java.lang.String port)

### getOutputInitialAddress

    public static java.lang.String getOutputInitialAddress(org.apache.hadoop.conf.Configuration conf)

### setOutputInitialAddress

    public static void setOutputInitialAddress(org.apache.hadoop.conf.Configuration conf,
                                               java.lang.String address)

### setOutputPartitioner

    public static void setOutputPartitioner(org.apache.hadoop.conf.Configuration conf,
                                            java.lang.String classname)

### getOutputPartitioner

    public static IPartitioner getOutputPartitioner(org.apache.hadoop.conf.Configuration conf)

### getOutputCompressionClass

    public static java.lang.String getOutputCompressionClass(org.apache.hadoop.conf.Configuration conf)

### getOutputCompressionChunkLength

    public static java.lang.String getOutputCompressionChunkLength(org.apache.hadoop.conf.Configuration conf)

### setOutputCompressionClass

    public static void setOutputCompressionClass(org.apache.hadoop.conf.Configuration conf,
                                                 java.lang.String classname)

### setOutputCompressionChunkLength

    public static void setOutputCompressionChunkLength(org.apache.hadoop.conf.Configuration conf,
                                                       java.lang.String length)

### setThriftFramedTransportSizeInMb

    public static void setThriftFramedTransportSizeInMb(org.apache.hadoop.conf.Configuration conf,
                                                        int frameSizeInMB)

### getThriftFramedTransportSize

    public static int getThriftFramedTransportSize(org.apache.hadoop.conf.Configuration conf)

  Parameters:
    `conf` - The configuration to use.
  Returns:
    Value (converts MBs to Bytes) set by `setThriftFramedTransportSizeInMb(Configuration, int)` or default of 15MB

### setThriftMaxMessageLengthInMb

    public static void setThriftMaxMessageLengthInMb(org.apache.hadoop.conf.Configuration conf,
                                                     int maxMessageSizeInMB)

### getThriftMaxMessageLength

    public static int getThriftMaxMessageLength(org.apache.hadoop.conf.Configuration conf)

  Parameters:
    `conf` - The configuration to use.
  Returns:
    Value (converts MBs to Bytes) set by `setThriftMaxMessageLengthInMb(Configuration, int)` or default of 16MB

### getOutputCompressionParamaters

    public static CompressionParameters getOutputCompressionParamaters(org.apache.hadoop.conf.Configuration conf)

### getClientFromInputAddressList

    public static Cassandra.Client getClientFromInputAddressList(org.apache.hadoop.conf.Configuration conf)
                                                          throws java.io.IOException

  Throws:
    `java.io.IOException`

### getClientFromOutputAddressList

    public static Cassandra.Client getClientFromOutputAddressList(org.apache.hadoop.conf.Configuration conf)
                                                           throws java.io.IOException

  Throws:
    `java.io.IOException`

### createConnection

    public static Cassandra.Client createConnection(org.apache.hadoop.conf.Configuration conf,
                                                    java.lang.String host,
                                                    java.lang.Integer port)
                                             throws java.io.IOException

  Throws:
    `java.io.IOException`

### getInputTransportFactory

    public static ITransportFactory getInputTransportFactory(org.apache.hadoop.conf.Configuration conf)

### setInputTransportFactoryClass

    public static void setInputTransportFactoryClass(org.apache.hadoop.conf.Configuration conf,
                                                     java.lang.String classname)

### getOutputTransportFactory

    public static ITransportFactory getOutputTransportFactory(org.apache.hadoop.conf.Configuration conf)

### setOutputTransportFactoryClass

    public static void setOutputTransportFactoryClass(org.apache.hadoop.conf.Configuration conf,
                                                      java.lang.String classname)

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