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## org.apache.cassandra.hadoop.pig
Class CassandraStorage

    java.lang.Object
      org.apache.pig.LoadFunc
          org.apache.cassandra.hadoop.pig.CassandraStorage

All Implemented Interfaces:
  org.apache.pig.LoadMetadata, org.apache.pig.StoreFuncInterface

    public class CassandraStorage

extends org.apache.pig.LoadFunc
implements org.apache.pig.StoreFuncInterface, org.apache.pig.LoadMetadata

A LoadStoreFunc for retrieving data from and storing data to Cassandra A row from a standard CF will be returned as nested tuples: (key, ((name1, val1), (name2, val2))).

Field Summary
`static java.lang.String` | `PIG_ALLOW_DELETES`
`static java.lang.String` | `PIG_INITIAL_ADDRESS`
`static java.lang.String` | `PIG_INPUT_FORMAT`
`static java.lang.String` | `PIG_INPUT_INITIAL_ADDRESS`
`static java.lang.String` | `PIG_INPUT_PARTITIONER`
`static java.lang.String` | `PIG_INPUT_RPC_PORT`
`static java.lang.String` | `PIG_OUTPUT_FORMAT`
`static java.lang.String` | `PIG_OUTPUT_INITIAL_ADDRESS`
`static java.lang.String` | `PIG_OUTPUT_PARTITIONER`
`static java.lang.String` | `PIG_OUTPUT_RPC_PORT`
`static java.lang.String` | `PIG_PARTITIONER`
`static java.lang.String` | `PIG_RPC_PORT`
`static java.lang.String` | `PIG_USE_SECONDARY`
`static java.lang.String` | `PIG_WIDEROW_INPUT`

Constructor Summary
`CassandraStorage()`
`CassandraStorage(int limit)`

Method Summary
`void` | `checkSchema(org.apache.pig.ResourceSchema schema)`
`void` | `cleanupOnFailure(java.lang.String failure, org.apache.hadoop.mapreduce.Job job)`
`org.apache.hadoop.mapreduce.InputFormat` | `getInputFormat()`
`int` | `getLimit()`
`org.apache.pig.data.Tuple` | `getNext()`
`org.apache.pig.data.Tuple` | `getNextWide()`
`org.apache.hadoop.mapreduce.OutputFormat` | `getOutputFormat()`
`java.lang.String[]` | `getPartitionKeys(java.lang.String location, org.apache.hadoop.mapreduce.Job job)`
`static java.util.Map<java.lang.String,java.lang.String>` | `getQueryMap(java.lang.String query)`
`org.apache.pig.ResourceSchema` | `getSchema(java.lang.String location, org.apache.hadoop.mapreduce.Job job)`
`org.apache.pig.ResourceStatistics` | `getStatistics(java.lang.String location, org.apache.hadoop.mapreduce.Job job)`
`void` | `prepareToRead(org.apache.hadoop.mapreduce.RecordReader reader, org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigSplit split)`
`void` | `prepareToWrite(org.apache.hadoop.mapreduce.RecordWriter writer)`
`void` | `putNext(org.apache.pig.data.Tuple t)`
`java.lang.String` | `relativeToAbsolutePath(java.lang.String location, org.apache.hadoop.fs.Path curDir)`
`java.lang.String` | `relToAbsPathForStoreLocation(java.lang.String location, org.apache.hadoop.fs.Path curDir)`
`void` | `setLocation(java.lang.String location, org.apache.hadoop.mapreduce.Job job)`
`void` | `setPartitionFilter(org.apache.pig.Expression partitionFilter)`
`void` | `setStoreFuncUDFContextSignature(java.lang.String signature)`
`void` | `setStoreLocation(java.lang.String location, org.apache.hadoop.mapreduce.Job job)`
`void` | `setUDFContextSignature(java.lang.String signature)`

Methods inherited from class org.apache.pig.LoadFunc
`getAbsolutePath, getLoadCaster, getPathStrings, join`

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

Field Detail

### PIG_INPUT_RPC_PORT

    public static final java.lang.String PIG_INPUT_RPC_PORT

See Also:
  Constant Field Values

### PIG_INPUT_INITIAL_ADDRESS

    public static final java.lang.String PIG_INPUT_INITIAL_ADDRESS

See Also:
  Constant Field Values

### PIG_INPUT_PARTITIONER

    public static final java.lang.String PIG_INPUT_PARTITIONER

See Also:
  Constant Field Values

### PIG_OUTPUT_RPC_PORT

    public static final java.lang.String PIG_OUTPUT_RPC_PORT

See Also:
  Constant Field Values

### PIG_OUTPUT_INITIAL_ADDRESS

    public static final java.lang.String PIG_OUTPUT_INITIAL_ADDRESS

See Also:
  Constant Field Values

### PIG_OUTPUT_PARTITIONER

    public static final java.lang.String PIG_OUTPUT_PARTITIONER

See Also:
  Constant Field Values

### PIG_RPC_PORT

    public static final java.lang.String PIG_RPC_PORT

See Also:
  Constant Field Values

### PIG_INITIAL_ADDRESS

    public static final java.lang.String PIG_INITIAL_ADDRESS

See Also:
  Constant Field Values

### PIG_PARTITIONER

    public static final java.lang.String PIG_PARTITIONER

See Also:
  Constant Field Values

### PIG_INPUT_FORMAT

    public static final java.lang.String PIG_INPUT_FORMAT

See Also:
  Constant Field Values

### PIG_OUTPUT_FORMAT

    public static final java.lang.String PIG_OUTPUT_FORMAT

See Also:
  Constant Field Values

### PIG_ALLOW_DELETES

    public static final java.lang.String PIG_ALLOW_DELETES

See Also:
  Constant Field Values

### PIG_WIDEROW_INPUT

    public static final java.lang.String PIG_WIDEROW_INPUT

See Also:
  Constant Field Values

### PIG_USE_SECONDARY

    public static final java.lang.String PIG_USE_SECONDARY

See Also:
  Constant Field Values

Constructor Detail

### CassandraStorage

    public CassandraStorage()

### CassandraStorage

    public CassandraStorage(int limit)

Parameters:
  `limit` - number of columns to fetch in a slice

Method Detail

### getLimit

    public int getLimit()

### getNextWide

    public org.apache.pig.data.Tuple getNextWide()
                                          throws java.io.IOException

  Throws:
    `java.io.IOException`

### getNext

    public org.apache.pig.data.Tuple getNext()
                                      throws java.io.IOException

  Specified by:
    `getNext` in class `org.apache.pig.LoadFunc`
  Throws:
    `java.io.IOException`

### getInputFormat

    public org.apache.hadoop.mapreduce.InputFormat getInputFormat()

  Specified by:
    `getInputFormat` in class `org.apache.pig.LoadFunc`

### prepareToRead

    public void prepareToRead(org.apache.hadoop.mapreduce.RecordReader reader,
                              org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigSplit split)

  Specified by:
    `prepareToRead` in class `org.apache.pig.LoadFunc`

### getQueryMap

    public static java.util.Map<java.lang.String,java.lang.String> getQueryMap(java.lang.String query)

### setLocation

    public void setLocation(java.lang.String location,
                            org.apache.hadoop.mapreduce.Job job)
                     throws java.io.IOException

  Specified by:
    `setLocation` in class `org.apache.pig.LoadFunc`
  Throws:
    `java.io.IOException`

### getSchema

    public org.apache.pig.ResourceSchema getSchema(java.lang.String location,
                                                   org.apache.hadoop.mapreduce.Job job)
                                            throws java.io.IOException

  Specified by:
    `getSchema` in interface `org.apache.pig.LoadMetadata`
  Throws:
    `java.io.IOException`

### getStatistics

    public org.apache.pig.ResourceStatistics getStatistics(java.lang.String location,
                                                           org.apache.hadoop.mapreduce.Job job)

  Specified by:
    `getStatistics` in interface `org.apache.pig.LoadMetadata`

### getPartitionKeys

    public java.lang.String[] getPartitionKeys(java.lang.String location,
                                               org.apache.hadoop.mapreduce.Job job)

  Specified by:
    `getPartitionKeys` in interface `org.apache.pig.LoadMetadata`

### setPartitionFilter

    public void setPartitionFilter(org.apache.pig.Expression partitionFilter)

  Specified by:
    `setPartitionFilter` in interface `org.apache.pig.LoadMetadata`

### relativeToAbsolutePath

    public java.lang.String relativeToAbsolutePath(java.lang.String location,
                                                   org.apache.hadoop.fs.Path curDir)
                                            throws java.io.IOException

  Overrides:
    `relativeToAbsolutePath` in class `org.apache.pig.LoadFunc`
  Throws:
    `java.io.IOException`

### setUDFContextSignature

    public void setUDFContextSignature(java.lang.String signature)

  Overrides:
    `setUDFContextSignature` in class `org.apache.pig.LoadFunc`

### setStoreFuncUDFContextSignature

    public void setStoreFuncUDFContextSignature(java.lang.String signature)

  Specified by:
    `setStoreFuncUDFContextSignature` in interface `org.apache.pig.StoreFuncInterface`

### relToAbsPathForStoreLocation

    public java.lang.String relToAbsPathForStoreLocation(java.lang.String location,
                                                         org.apache.hadoop.fs.Path curDir)
                                                  throws java.io.IOException

  Specified by:
    `relToAbsPathForStoreLocation` in interface `org.apache.pig.StoreFuncInterface`
  Throws:
    `java.io.IOException`

### setStoreLocation

    public void setStoreLocation(java.lang.String location,
                                 org.apache.hadoop.mapreduce.Job job)
                          throws java.io.IOException

  Specified by:
    `setStoreLocation` in interface `org.apache.pig.StoreFuncInterface`
  Throws:
    `java.io.IOException`

### getOutputFormat

    public org.apache.hadoop.mapreduce.OutputFormat getOutputFormat()

  Specified by:
    `getOutputFormat` in interface `org.apache.pig.StoreFuncInterface`

### checkSchema

    public void checkSchema(org.apache.pig.ResourceSchema schema)
                     throws java.io.IOException

  Specified by:
    `checkSchema` in interface `org.apache.pig.StoreFuncInterface`
  Throws:
    `java.io.IOException`

### prepareToWrite

    public void prepareToWrite(org.apache.hadoop.mapreduce.RecordWriter writer)

  Specified by:
    `prepareToWrite` in interface `org.apache.pig.StoreFuncInterface`

### putNext

    public void putNext(org.apache.pig.data.Tuple t)
                 throws java.io.IOException

  Specified by:
    `putNext` in interface `org.apache.pig.StoreFuncInterface`
  Throws:
    `java.io.IOException`

### cleanupOnFailure

    public void cleanupOnFailure(java.lang.String failure,
                                 org.apache.hadoop.mapreduce.Job job)

  Specified by:
    `cleanupOnFailure` in interface `org.apache.pig.StoreFuncInterface`

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Copyright © 2013 The Apache Software Foundation