Package org.apache.hbase.archetypes.exemplars.client

Class HelloHBase

java.lang.Object

org.apache.hbase.archetypes.exemplars.client.HelloHBase

public final class HelloHBase
extends Object

Successful running of this application requires access to an active instance of HBase. For install instructions for a standalone instance of HBase, please refer to https://hbase.apache.org/book.html#quickstart

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final byte[]	MY_COLUMN_FAMILY_NAME
(package private) static final byte[]	MY_FIRST_COLUMN_QUALIFIER
(package private) static final String	MY_NAMESPACE_NAME
(package private) static final byte[]	MY_ROW_ID
(package private) static final byte[]	MY_SECOND_COLUMN_QUALIFIER
(package private) static final TableName	MY_TABLE_NAME

Constructor Summary

Constructors

Modifier	Constructor	Description
private	HelloHBase()

Method Summary

Modifier and Type	Method	Description
(package private) static void	createNamespaceAndTable(Admin admin)	Invokes Admin#createNamespace and Admin#createTable to create a namespace with a table that has one column-family.
(package private) static void	deleteNamespaceAndTable(Admin admin)	Invokes Admin#disableTable, Admin#deleteTable, and Admin#deleteNamespace to disable/delete Table and delete Namespace.
(package private) static void	deleteRow(Table table)	Invokes Table#delete to delete test data (i.e.
(package private) static void	getAndPrintRowContents(Table table)	Invokes Table#get and prints out the contents of the retrieved row.
static void	main(String[] args)
(package private) static boolean	namespaceExists(Admin admin, String namespaceName)	Checks to see whether a namespace exists.
(package private) static void	putRowToTable(Table table)	Invokes Table#put to store a row (with two new columns created 'on the fly') into the table.

Methods inherited from class java.lang.Object

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

Field Details

MY_NAMESPACE_NAME

static final String MY_NAMESPACE_NAME

See Also:

• Constant Field Values

MY_TABLE_NAME

static final TableName MY_TABLE_NAME

MY_COLUMN_FAMILY_NAME

static final byte[] MY_COLUMN_FAMILY_NAME

MY_FIRST_COLUMN_QUALIFIER

static final byte[] MY_FIRST_COLUMN_QUALIFIER

MY_SECOND_COLUMN_QUALIFIER

static final byte[] MY_SECOND_COLUMN_QUALIFIER

MY_ROW_ID

static final byte[] MY_ROW_ID

Constructor Details

HelloHBase

private HelloHBase()

Method Details

main

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

Throws:

IOException

createNamespaceAndTable

static void createNamespaceAndTable(Admin admin)
                             throws IOException

Invokes Admin#createNamespace and Admin#createTable to create a namespace with a table that has one column-family.

Parameters:

admin - Standard Admin object

Throws:

IOException - If IO problem encountered

putRowToTable

static void putRowToTable(Table table)
                   throws IOException

Invokes Table#put to store a row (with two new columns created 'on the fly') into the table.

Parameters:

table - Standard Table object (used for CRUD operations).

Throws:

IOException - If IO problem encountered

getAndPrintRowContents

static void getAndPrintRowContents(Table table)
                            throws IOException

Invokes Table#get and prints out the contents of the retrieved row.

Parameters:

table - Standard Table object

Throws:

IOException - If IO problem encountered

namespaceExists

static boolean namespaceExists(Admin admin,
 String namespaceName)
                        throws IOException

Checks to see whether a namespace exists.

Parameters:

admin - Standard Admin object

namespaceName - Name of namespace

Returns:

true If namespace exists

Throws:

IOException - If IO problem encountered

deleteRow

static void deleteRow(Table table)
               throws IOException

Invokes Table#delete to delete test data (i.e. the row)

Parameters:

table - Standard Table object

Throws:

IOException - If IO problem is encountered

deleteNamespaceAndTable

static void deleteNamespaceAndTable(Admin admin)
                             throws IOException

Invokes Admin#disableTable, Admin#deleteTable, and Admin#deleteNamespace to disable/delete Table and delete Namespace.

Parameters:

admin - Standard Admin object

Throws:

IOException - If IO problem is encountered