Package org.apache.hadoop.hbase.client.example

Class AsyncClientExample

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.hbase.client.example.AsyncClientExample

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, org.apache.hadoop.util.Tool

@Private
public class AsyncClientExample
extends org.apache.hadoop.conf.Configured
implements org.apache.hadoop.util.Tool

A simple example shows how to use asynchronous client.

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	DEFAULT_NUM_OPS	The default number of operations.
private static final byte[]	FAMILY	The name of the column family.
private final AtomicReference<CompletableFuture<AsyncConnection>>	future
private static final org.slf4j.Logger	LOG
private static final byte[]	QUAL	For the example we're just using one qualifier.
private static final int	THREAD_POOL_SIZE	The size for thread pool.

Constructor Summary

Constructors

Constructor	Description
AsyncClientExample()

Method Summary

Modifier and Type	Method	Description
private CompletableFuture<Void>	closeConn()
private CompletableFuture<AsyncConnection>	getConn()
private byte[]	getKey(int i)
static void	main(String[] args)
int	run(String[] args)

Methods inherited from class org.apache.hadoop.conf.Configured

getConf, setConf

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.conf.Configurable

getConf, setConf

Field Details

LOG

private static final org.slf4j.Logger LOG

THREAD_POOL_SIZE

private static final int THREAD_POOL_SIZE

The size for thread pool.

See Also:

• Constant Field Values

DEFAULT_NUM_OPS

private static final int DEFAULT_NUM_OPS

The default number of operations.

See Also:

• Constant Field Values

FAMILY

private static final byte[] FAMILY

The name of the column family. d for default.

QUAL

private static final byte[] QUAL

For the example we're just using one qualifier.

future

private final AtomicReference<CompletableFuture<AsyncConnection>> future

Constructor Details

AsyncClientExample

public AsyncClientExample()

Method Details

getConn

private CompletableFuture<AsyncConnection> getConn()

closeConn

private CompletableFuture<Void> closeConn()

getKey

private byte[] getKey(int i)

run

public int run(String[] args)
        throws Exception

Specified by:

run in interface org.apache.hadoop.util.Tool

Throws:

Exception

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception