HBase Client API
Class HBase Configuration
| Methods | Description |
|---|---|
| static org.apache.hadoop.conf.Configuration create() | This method creates a Configuration with HBase resources. |
Class HTable
| Constructors | Description |
|---|---|
| HTable() | |
| HTable(TableName tableName, ClusterConnection connection, ExecutorService pool) | Using this constructor, you can create an object to access an HBase table. |
| Methods | Description |
|---|---|
| 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. |
Class Put
| Constructors | Description |
|---|---|
| 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. |
| Methods | Description |
|---|---|
| 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. |
Class Get
| Constructors | Description |
|---|---|
| Get(byte[] row) | Using this constructor, you can create a Get operation for the specified row. |
| Get(Get get) |
| Methods | Description |
|---|---|
| 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. |
Class Delete
| Constructors | Description |
|---|---|
| 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. |
| Methods | Description |
|---|---|
| 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. |
Class Result
| Constructors | Description |
|---|---|
| Result() | Using this constructor, you can create an empty Result with no KeyValue payload; returns null if you call raw Cells(). |
| Methods | Description |
|---|---|
| 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. |