@InterfaceAudience.Public @InterfaceStability.Stable public class DBOutputFormat<K extends DBWritable,V> extends DBOutputFormat<K,V> implements OutputFormat<K,V>
dbProductName
Constructor and Description |
---|
DBOutputFormat() |
Modifier and Type | Method and Description |
---|---|
void |
checkOutputSpecs(FileSystem filesystem,
JobConf job)
Check for validity of the output-specification for the job.
|
RecordWriter<K,V> |
getRecordWriter(FileSystem filesystem,
JobConf job,
String name,
Progressable progress)
Get the
RecordWriter for the given job. |
static void |
setOutput(JobConf job,
String tableName,
int fieldCount)
Initializes the reduce-part of the job with the appropriate output settings
|
static void |
setOutput(JobConf job,
String tableName,
String... fieldNames)
Initializes the reduce-part of the job with the appropriate output settings
|
checkOutputSpecs, constructQuery, getOutputCommitter, getRecordWriter, setOutput, setOutput
public void checkOutputSpecs(FileSystem filesystem, JobConf job) throws IOException
This is to validate the output specification for the job when it is a job is submitted. Typically checks that it does not already exist, throwing an exception when it already exists, so that output is not overwritten.
Implementations which write to filesystems which support delegation tokens usually collect the tokens for the destination path(s) and attach them to the job configuration.checkOutputSpecs
in interface OutputFormat<K extends DBWritable,V>
job
- job configuration.IOException
- when output should not be attemptedpublic RecordWriter<K,V> getRecordWriter(FileSystem filesystem, JobConf job, String name, Progressable progress) throws IOException
RecordWriter
for the given job.getRecordWriter
in interface OutputFormat<K extends DBWritable,V>
job
- configuration for the job whose output is being written.name
- the unique name for this part of the output.progress
- mechanism for reporting progress while writing to file.RecordWriter
to write the output for the job.IOException
public static void setOutput(JobConf job, String tableName, String... fieldNames)
job
- The jobtableName
- The table to insert data intofieldNames
- The field names in the table.Copyright © 2024 Apache Software Foundation. All rights reserved.