org.apache.iotdb.hadoop.tsfile

类 TSFRecordReader

java.lang.Object

org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.MapWritable>

org.apache.iotdb.hadoop.tsfile.TSFRecordReader

所有已实现的接口:

Closeable, AutoCloseable, IReaderSet

public class TSFRecordReader
extends org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.MapWritable>
implements IReaderSet

构造器概要

构造器

构造器和说明
TSFRecordReader()

方法概要

限定符和类型	方法和说明
void	close()
org.apache.hadoop.io.NullWritable	getCurrentKey()
org.apache.hadoop.io.MapWritable	getCurrentValue()
static org.apache.hadoop.io.MapWritable	getCurrentValue(List<String> deviceIdList, int currentIndex, long timestamp, boolean isReadTime, boolean isReadDeviceId, List<Field> fields, List<String> measurementIds)
float	getProgress()
void	initialize(org.apache.hadoop.mapreduce.InputSplit split, org.apache.hadoop.mapreduce.TaskAttemptContext context)
static void	initialize(TSFInputSplit split, org.apache.hadoop.conf.Configuration configuration, IReaderSet readerSet, List<QueryDataSet> dataSetList, List<String> deviceIdList)
boolean	nextKeyValue()
static void	readFieldsValue(org.apache.hadoop.io.MapWritable mapWritable, List<Field> fields, List<String> measurementIds) Read from current fields value
void	setMeasurementIds(List<String> measurementIds)
void	setReadDeviceId(boolean isReadDeviceId)
void	setReader(TsFileSequenceReader reader)
void	setReadTime(boolean isReadTime)

从类继承的方法 java.lang.Object

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

构造器详细资料

TSFRecordReader

public TSFRecordReader()

方法详细资料

initialize

public void initialize(org.apache.hadoop.mapreduce.InputSplit split,
                       org.apache.hadoop.mapreduce.TaskAttemptContext context)
                throws IOException

指定者:

initialize 在类中 org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.MapWritable>

抛出:

IOException

initialize

public static void initialize(TSFInputSplit split,
                              org.apache.hadoop.conf.Configuration configuration,
                              IReaderSet readerSet,
                              List<QueryDataSet> dataSetList,
                              List<String> deviceIdList)
                       throws IOException

抛出:

IOException

nextKeyValue

public boolean nextKeyValue()
                     throws IOException

指定者:

nextKeyValue 在类中 org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.MapWritable>

抛出:

IOException

getCurrentKey

public org.apache.hadoop.io.NullWritable getCurrentKey()

指定者:

getCurrentKey 在类中 org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.MapWritable>

getCurrentValue

public org.apache.hadoop.io.MapWritable getCurrentValue()
                                                 throws InterruptedException

指定者:

getCurrentValue 在类中 org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.MapWritable>

抛出:

InterruptedException

getCurrentValue

public static org.apache.hadoop.io.MapWritable getCurrentValue(List<String> deviceIdList,
                                                               int currentIndex,
                                                               long timestamp,
                                                               boolean isReadTime,
                                                               boolean isReadDeviceId,
                                                               List<Field> fields,
                                                               List<String> measurementIds)
                                                        throws InterruptedException

抛出:

InterruptedException

readFieldsValue

public static void readFieldsValue(org.apache.hadoop.io.MapWritable mapWritable,
                                   List<Field> fields,
                                   List<String> measurementIds)
                            throws InterruptedException

Read from current fields value

参数:

mapWritable - where to write

抛出:

InterruptedException

getProgress

public float getProgress()

指定者:

getProgress 在类中 org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.MapWritable>

close

public void close()
           throws IOException

指定者:

close 在接口中 Closeable

指定者:

close 在接口中 AutoCloseable

指定者:

close 在类中 org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.MapWritable>

抛出:

IOException

setReader

public void setReader(TsFileSequenceReader reader)

指定者:

setReader 在接口中 IReaderSet

setMeasurementIds

public void setMeasurementIds(List<String> measurementIds)

指定者:

setMeasurementIds 在接口中 IReaderSet

setReadDeviceId

public void setReadDeviceId(boolean isReadDeviceId)

指定者:

setReadDeviceId 在接口中 IReaderSet

setReadTime

public void setReadTime(boolean isReadTime)

指定者:

setReadTime 在接口中 IReaderSet