io.cdap.plugin.db.batch.source

Class DBSource

java.lang.Object

io.cdap.cdap.etl.api.batch.BatchConfigurable<BatchSourceContext>

io.cdap.cdap.etl.api.batch.BatchSource<KEY_IN,VAL_IN,OUT>

io.cdap.plugin.common.ReferenceBatchSource<org.apache.hadoop.io.LongWritable,DBRecord,io.cdap.cdap.api.data.format.StructuredRecord>

io.cdap.plugin.db.batch.source.DBSource

All Implemented Interfaces:

Destroyable, PipelineConfigurable, StageLifecycle<BatchRuntimeContext>, SubmitterLifecycle<BatchSourceContext>, Transformation<io.cdap.cdap.api.dataset.lib.KeyValue<org.apache.hadoop.io.LongWritable,DBRecord>,io.cdap.cdap.api.data.format.StructuredRecord>

public class DBSource
extends ReferenceBatchSource<org.apache.hadoop.io.LongWritable,DBRecord,io.cdap.cdap.api.data.format.StructuredRecord>

Batch source to read from a DB table

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DBSource.DBSourceConfig PluginConfig for DBSource

Field Summary

Fields inherited from class io.cdap.cdap.etl.api.batch.BatchSource

FORMAT_PLUGIN_TYPE, PLUGIN_TYPE

Constructor Summary

Constructors

Constructor and Description
DBSource(DBSource.DBSourceConfig sourceConfig)

Method Summary

Modifier and Type	Method and Description
void	configurePipeline(PipelineConfigurer pipelineConfigurer)
void	destroy()
void	initialize(BatchRuntimeContext context)
void	prepareRun(BatchSourceContext context)
void	transform(io.cdap.cdap.api.dataset.lib.KeyValue<org.apache.hadoop.io.LongWritable,DBRecord> input, Emitter<io.cdap.cdap.api.data.format.StructuredRecord> emitter)

Methods inherited from class io.cdap.cdap.etl.api.batch.BatchConfigurable

onRunFinish

Methods inherited from class java.lang.Object

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

Constructor Detail

DBSource

public DBSource(DBSource.DBSourceConfig sourceConfig)

Method Detail

configurePipeline

public void configurePipeline(PipelineConfigurer pipelineConfigurer)

Specified by:

configurePipeline in interface PipelineConfigurable

Overrides:

configurePipeline in class ReferenceBatchSource<org.apache.hadoop.io.LongWritable,DBRecord,io.cdap.cdap.api.data.format.StructuredRecord>

prepareRun

public void prepareRun(BatchSourceContext context)
                throws Exception

Specified by:

prepareRun in interface SubmitterLifecycle<BatchSourceContext>

Specified by:

prepareRun in class BatchConfigurable<BatchSourceContext>

Throws:

Exception

initialize

public void initialize(BatchRuntimeContext context)
                throws Exception

Specified by:

initialize in interface StageLifecycle<BatchRuntimeContext>

Overrides:

initialize in class BatchSource<org.apache.hadoop.io.LongWritable,DBRecord,io.cdap.cdap.api.data.format.StructuredRecord>

Throws:

Exception

transform

public void transform(io.cdap.cdap.api.dataset.lib.KeyValue<org.apache.hadoop.io.LongWritable,DBRecord> input,
                      Emitter<io.cdap.cdap.api.data.format.StructuredRecord> emitter)
               throws Exception

Specified by:

transform in interface Transformation<io.cdap.cdap.api.dataset.lib.KeyValue<org.apache.hadoop.io.LongWritable,DBRecord>,io.cdap.cdap.api.data.format.StructuredRecord>

Overrides:

transform in class BatchSource<org.apache.hadoop.io.LongWritable,DBRecord,io.cdap.cdap.api.data.format.StructuredRecord>

Throws:

Exception

destroy

public void destroy()

Specified by:

destroy in interface Destroyable

Overrides:

destroy in class BatchSource<org.apache.hadoop.io.LongWritable,DBRecord,io.cdap.cdap.api.data.format.StructuredRecord>