| Package | Description | 
|---|---|
| org.apache.crunch.contrib.io.jdbc | Support for reading data from RDBMS using JDBC | 
| org.apache.crunch.impl.dist | |
| org.apache.crunch.io | Data input and output for Pipelines. | 
| org.apache.crunch.io.impl | |
| org.apache.crunch.kafka | |
| org.apache.crunch.types | Common functionality for business object serialization. | 
| org.apache.crunch.types.avro | Business object serialization using Apache Avro. | 
| org.apache.crunch.types.writable | Business object serialization using Hadoop's Writables framework. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | DataBaseSource<T extends org.apache.hadoop.mapreduce.lib.db.DBWritable & org.apache.hadoop.io.Writable>Source from reading from a database via a JDBC connection. | 
| Modifier and Type | Method and Description | 
|---|---|
| <T> ReadableSource<T> | DistributedPipeline. getMaterializeSourceTarget(PCollection<T> pcollection)Retrieve a ReadableSourceTarget that provides access to the contents of a  PCollection. | 
| Modifier and Type | Interface and Description | 
|---|---|
| interface  | ReadableSourceTarget<T>An interface that indicates that a  SourceTargetinstance can be read
 into the local client. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | org.apache.crunch.io.impl.FileSourceImpl<T> | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | KafkaSourceA Crunch Source that will retrieve events from Kafka given start and end offsets. | 
| Modifier and Type | Method and Description | 
|---|---|
| ReadableSource<T> | PType. createSourceTarget(org.apache.hadoop.conf.Configuration conf,
                  org.apache.hadoop.fs.Path path,
                  Iterable<T> contents,
                  int parallelism)Returns a  ReadableSourcethat contains the data in the givenIterable. | 
| Modifier and Type | Method and Description | 
|---|---|
| ReadableSource<T> | AvroType. createSourceTarget(org.apache.hadoop.conf.Configuration conf,
                  org.apache.hadoop.fs.Path path,
                  Iterable<T> contents,
                  int parallelism) | 
| Modifier and Type | Method and Description | 
|---|---|
| ReadableSource<T> | WritableType. createSourceTarget(org.apache.hadoop.conf.Configuration conf,
                  org.apache.hadoop.fs.Path path,
                  Iterable<T> contents,
                  int parallelism) | 
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