org.apache.hadoop.mapreduce.lib.db

类 DBOutputFormat.DBRecordWriter

java.lang.Object

org.apache.hadoop.mapreduce.RecordWriter<K,V>

org.apache.hadoop.mapreduce.lib.db.DBOutputFormat.DBRecordWriter

封闭类:

DBOutputFormat<K extends DBWritable,V>

@InterfaceStability.Evolving
public class DBOutputFormat.DBRecordWriter
extends RecordWriter<K,V>

A RecordWriter that writes the reduce output to a SQL table

构造器概要

构造器

构造器和说明
DBOutputFormat.DBRecordWriter()
DBOutputFormat.DBRecordWriter(Connection connection, PreparedStatement statement)

方法概要

方法

限定符和类型	方法和说明
void	close(TaskAttemptContext context) Close this RecordWriter to future operations.
Connection	getConnection()
PreparedStatement	getStatement()
void	write(K key, V value) Writes a key/value pair.

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

DBOutputFormat.DBRecordWriter

public DBOutputFormat.DBRecordWriter()
                              throws SQLException

抛出:

SQLException

DBOutputFormat.DBRecordWriter

public DBOutputFormat.DBRecordWriter(Connection connection,
                             PreparedStatement statement)
                              throws SQLException

抛出:

SQLException

方法详细资料

getConnection

public Connection getConnection()

getStatement

public PreparedStatement getStatement()

close

public void close(TaskAttemptContext context)
           throws IOException

Close this RecordWriter to future operations.

指定者:

close 在类中 RecordWriter<K extends DBWritable,V>

参数:

context - the context of the task

抛出:

IOException

write

public void write(K key,
         V value)
           throws IOException

Writes a key/value pair.

指定者:

write 在类中 RecordWriter<K extends DBWritable,V>

参数:

key - the key to write.

value - the value to write.

抛出:

IOException