HBase - Client API

static org.apache.hadoop.conf.Configuration create()

This method creates a Configuration with HBase resources.

HTable()

HTable(TableName tableName, ClusterConnection connection, ExecutorService pool)

Using this constructor, you can create an object to access an HBase table.

void close()

Releases all the resources of the HTable.

void delete(Delete delete)

Deletes the specified cells/row.

boolean exists(Get get)

Using this method, you can test the existence of columns in the table, as specified by Get.

Result get(Get get)

Retrieves certain cells from a given row.

org.apache.hadoop.conf.Configuration getConfiguration()

Returns the Configuration object used by this instance.

TableName getName()

Returns the table name instance of this table.

HTableDescriptor getTableDescriptor()

Returns the table descriptor for this table.

byte[] getTableName()

Returns the name of this table.

void put(Put put)

Using this method, you can insert data into the table.

Put(byte[] row)

Using this constructor, you can create a Put operation for the specified row.

Put(byte[] rowArray, int rowOffset, int rowLength)

Using this constructor, you can make a copy of the passed-in row key to keep local.

Put(byte[] rowArray, int rowOffset, int rowLength, long ts)

Using this constructor, you can make a copy of the passed-in row key to keep local.

Put(byte[] row, long ts)

Using this constructor, we can create a Put operation for the specified row, using a given timestamp.

Put add(byte[] family, byte[] qualifier, byte[] value)

Adds the specified column and value to this Put operation.

Put add(byte[] family, byte[] qualifier, long ts, byte[] value)

Adds the specified column and value, with the specified timestamp as its version to this Put operation.

Put add(byte[] family, ByteBuffer qualifier, long ts, ByteBuffer value)

Adds the specified column and value, with the specified timestamp as its version to this Put operation.

Put add(byte[] family, ByteBuffer qualifier, long ts, ByteBuffer value)

Adds the specified column and value, with the specified timestamp as its version to this Put operation.

Get(byte[] row)

Using this constructor, you can create a Get operation for the specified row.

Get addColumn(byte[] family, byte[] qualifier)

Retrieves the column from the specific family with the specified qualifier.

Get addFamily(byte[] family)

Retrieves all columns from the specified family.

Delete(byte[] row)

Creates a Delete operation for the specified row.

Delete(byte[] rowArray, int rowOffset, int rowLength)

Creates a Delete operation for the specified row and timestamp.

Delete(byte[] rowArray, int rowOffset, int rowLength, long ts)

Creates a Delete operation for the specified row and timestamp.

Delete(byte[] row, long timestamp)

Creates a Delete operation for the specified row and timestamp.

Delete addColumn(byte[] family, byte[] qualifier)

Deletes the latest version of the specified column.

Delete addColumns(byte[] family, byte[] qualifier, long timestamp)

Deletes all versions of the specified column with a timestamp less than or equal to the specified timestamp.

Delete addFamily(byte[] family)

Deletes all versions of all columns of the specified family.

Delete addFamily(byte[] family, long timestamp)

Deletes all columns of the specified family with a timestamp less than or equal to the specified timestamp.

Result()

Using this constructor, you can create an empty Result with no KeyValue payload; returns null if you call raw Cells().

byte[] getValue(byte[] family, byte[] qualifier)

This method is used to get the latest version of the specified column.

byte[] getRow()

This method is used to retrieve the row key that corresponds to the row from which this Result was created.