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Introduction
Apache HBase provides a Java API for interacting with HBase and performing various activities.
As HBase is written in Java, it can communicate with Java API. The Java API, on the other hand, is the quickest way to interface with HBase. As a result, we'll describe the Java Admin API linked below, which covers managing tables.
The class representing the Admin in HBase, named HBase Admin API, will be introduced in this blog, "HBase Admin API." The role of the Class Descriptor in HBase will also be discussed, along with the methods and their descriptions.
Class HBaseAdmin
The admin class in HBase is called as HBaseAdmin, which is part of the org.apache.hadoop.hbase.client package. Using this class, we may execute the duties of an administrator. The Connection.getAdmin() method can be used to obtain an instance of Admin.
Methods and Description
The methods and descriptions available in HBase Admin API are as follows:
void createTable(HTableDescriptor desc) This method creates a new table.
void createTable(HTableDescriptor desc, byte[ ][ ] splitKeys) This method creates a new table with an initial set of empty regions determined by the split keys sent in.
void createTable(HTableDescriptor desc, byte[ ] startKey, byte[ ] endKey, int numRegions) It is used to create a new table with the specified number of regions.
void createTableAsync(HTableDescriptor desc, byte[ ][ ] splitKeys) It is used to create a new table but does not block and wait for it to come online.
void deleteColumn(byte[ ] tableName, String columnName) We utilise this method to delete a column from a table.
void deleteColumn(String tableName, String columnName) This method helps in the deletion of a column from a table.
void deleteTable(TableName tableName) This method is used to delete a table.
What is HBase? HBase is a column-oriented database with a configurable database structure. It mainly works on top of HDFS and also supports MapReduce tasks. HBase also supports various high-level languages for data processing.
Why do we use HBase Admin API? HBaseAdmin is a class that represents an administrator. The org.apache.hadoop.hbase.client package contains this class. You can use this class to conduct administrative duties. The Connection.getAdmin() method can be used to obtain an instance of Admin.
What are the methods and descriptions available in HBase Admin API? The methods and descriptions available in HBase Admin API are as follows:
HBase is a column-oriented database with a configurable database structure. It mainly works on top of HDFS and also supports MapReduce tasks. HBase also supports various high-level languages for data processing.
In this blog, we have seen the whole concept of HBase Admin API. We have learned about Class HBase Admin, Methods and Description, and Class Descriptor.
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