com.northconcepts.datapipeline.throttle

Class ThrottledReader

java.lang.Object

com.northconcepts.datapipeline.core.DataObject

com.northconcepts.datapipeline.core.Endpoint

com.northconcepts.datapipeline.core.DataEndpoint

com.northconcepts.datapipeline.core.DataReader

com.northconcepts.datapipeline.core.ProxyReader

com.northconcepts.datapipeline.meter.MeteredReader

com.northconcepts.datapipeline.throttle.ThrottledReader

All Implemented Interfaces:

Metered, Throttled

public class ThrottledReader
extends MeteredReader
implements Throttled

A proxy that limits the rate (bytes/second) at which data is read.

Nested Class Summary

Nested classes/interfaces inherited from class com.northconcepts.datapipeline.core.DataEndpoint

DataEndpoint.State

Field Summary

Fields inherited from class com.northconcepts.datapipeline.core.DataReader

fieldLineage, recordLineage

Fields inherited from class com.northconcepts.datapipeline.core.DataEndpoint

lastRecord, PRODUCT, PRODUCT_VERSION, VENDOR, XML_INPUT_FACTORY_KEY

Fields inherited from class com.northconcepts.datapipeline.core.Endpoint

BUFFER_SIZE, captureElapsedTime, DEFAULT_READ_BUFFER_SIZE

Fields inherited from class com.northconcepts.datapipeline.core.DataObject

id, log, name, TIMESTAMP_FORMAT

Constructor Summary

Constructors

Constructor and Description
ThrottledReader(DataReader reader, int bytesPerSecond)
ThrottledReader(DataReader reader, int unitsPerSecond, RecordMeter.MeterUnit units)

Method Summary

Modifier and Type	Method and Description
DataException	addExceptionProperties(DataException exception) Adds this endpoint's current state to a DataException.
RecordMeter.MeterUnit	getMeasure()
Throttle	getThrottle()
protected Record	readImpl() Overridden by subclasses to read the next record from this DataReader.
ThrottledReader	setMeasure(RecordMeter.MeterUnit measure)

Methods inherited from class com.northconcepts.datapipeline.meter.MeteredReader

close, getMeter

Methods inherited from class com.northconcepts.datapipeline.core.ProxyReader

available, getNestedReader, interceptRecord, map, map, open, setNestedDataReader, setNestedDataReader

Methods inherited from class com.northconcepts.datapipeline.core.DataReader

addLineage, getBufferSize, getNestedEndpoint, getReader, getRootEndpoint, getRootReader, isExhausted, isLineageSupported, isSaveLineage, peek, pop, push, read, setSaveLineage, skip

Methods inherited from class com.northconcepts.datapipeline.core.DataEndpoint

decrementRecordCount, enableJmx, getLastRecord, getRecordCount, getRecordCountAsBigInteger, getRecordCountAsString, incrementRecordCount, isRecordCountBigInteger, resetRecordCount, toString

Methods inherited from class com.northconcepts.datapipeline.core.Endpoint

addElapsedtime, assertClosed, assertNotOpened, assertOpened, finalize, getClosedOn, getDescription, getElapsedTime, getElapsedTimeAsString, getOpenedOn, getOpenElapsedTime, getOpenElapsedTimeAsString, getSelfTime, getSelfTimeAsString, getState, isCaptureElapsedTime, isClosed, isOpen, setCaptureElapsedTime, setDescription

Methods inherited from class com.northconcepts.datapipeline.core.DataObject

exception, exception, exception, getId, getName, resetID

Methods inherited from class java.lang.Object

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

Constructor Detail

ThrottledReader

public ThrottledReader(DataReader reader,
                       int bytesPerSecond)

ThrottledReader

public ThrottledReader(DataReader reader,
                       int unitsPerSecond,
                       RecordMeter.MeterUnit units)

Method Detail

getThrottle

public Throttle getThrottle()

Specified by:

getThrottle in interface Throttled

getMeasure

public RecordMeter.MeterUnit getMeasure()

setMeasure

public ThrottledReader setMeasure(RecordMeter.MeterUnit measure)

readImpl

protected Record readImpl()
                   throws Throwable

Description copied from class: DataReader

Overridden by subclasses to read the next record from this DataReader. The default implementation of DataReader.read() now insures that this method will not be called again after it returns a null.

If no record is available, null will be returned.

Overrides:

readImpl in class MeteredReader

Throws:

Throwable

addExceptionProperties

public DataException addExceptionProperties(DataException exception)

Description copied from class: Endpoint

Adds this endpoint's current state to a DataException. Since this method is called whenever an exception is thrown, subclasses should override it to add their specific information.

Overrides:

addExceptionProperties in class MeteredReader