Hbase Java Api

Before, moving forward you can follow below link blogs to gain more knowledge on HBase and its working. xml from remote cluster you are trying to access. When i use ROWPREFIXFILTER in HBase Shell i retrieve data within 2 seconds. The first one to examine is the write-heavy workload. I did small comparison (execution time) between Java and. For specifying how to read an HBase table, the existing class HCatTableInfo will be extended to contain an HBase Scan. Zeolearn Academy brings you a detailed HBase training designed specifically for Big Data developers. Use the Hadoop UserGroupInformation API for keytab login before you call HBase APIs, run kinit for ticket cache login, or run Java programs. HBase is really tough for querying. sh start rest; To use a different port than the default of 8080, use the -p option. I used the Apache Phoenix API and finally able to go beyond the connectivity to HBase and perform all the CRUD operations to HBase from Java Client. hbase-python is a python package used to work HBase. Titan System Properties Comparison HBase vs. Tutorial: Use Apache HBase in Azure HDInsight. HBase is written in Java and has a Java Native API. Also, when and how it can be used, which has been presented with executed screenshot. 5 Single Node. Using HBase REST API with the Knox Java client I’ve already introduced Knox in a previous post in order to deploy Spark Job with Knox using the Java client. When I debugged the code, I came to know that zookeeper was returning the address of hmaster as localhost. This chapter will discuss the client APIs provided by HBase. I have to communicate with hbase via java API. So yeah no documentation for the HBase REST API in regards to what should a filter look like So I installed Eclipse, got the library, and took some time to find some of the (seemingly) most useful filters you could use. Quick overcap of HBase before we proceed-. HBase is really tough for querying. HBase is designed as a column-oriented, data-storage model, innovated after being inspired by Google Big Table. Today we will be discussing how to connect hbase using java client api , Hadoop provides java api's for hbase through which we can perform CRUD operations on Hbase. Java API 45086 43945 44591 45393 44936 45849 45060. 98 首先说明一下,如果用eclipse操作hbase时,如果报unknown host错误,找不到主机,是因为你没有配ip地址的映射 方法是 找到你的系统盘里面的c:windowssystem32driversetc下的hosts文件,打开,增加一个映射 加一个映射 192. I am very new to HBase development. Java API is the fastest way to communicate with HBase. Tables in HBase can serve as the input and output for MapReduce jobs run in Hadoop, and may be accessed through the Java API but also through REST, Avro or Thrift gateway APIs. zhang-xzhi/simplehbase Simplehbase is a lightweight ORM framework between java app and hbase. The client APIs provide both DDL (data definition language) and DML (data manipulation language) semantics very much like what you find in SQL for relational databases. This allows HBase applications to implement their own data types that the HBase community hasn’t thought of or does not think are appropriate to ship with the core system. suffix - will be url encoded. HBASE JAVA CLIENT API. This method requires an instance of the Get class. HBase新版本Java API编程实战及基本操作方法封装. So, here, we are describing the referenced Java Admin API below, that covers the tasks used for managing tables. Initially, it was Google Big Table, afterward, it was re-named as HBase and is primarily written in Java. REST, Thrift and Avro are examples of popular HBase client. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4. 您所在的位置: 程序员俱乐部 > 编程开发 > JAVA > java调用HBase api创建表,插入数据 java调用HBase api创建表,插入数据 2014/8/25 0:12:49 beat_it_ 程序员俱乐部 我要评论( 0 ). Apache HBase Tutorial: Introduction to HBase. All code donations from external organisations and existing external projects seeking to join the Apache community enter through the Incubator. caching 1 Number of rows that will be fetched when calling next on a scanner if it is not served from memory. Running a Java HBase client in the Hortonworks Sandbox was not easy/intuitive as HBase is not enabled by default. Being asynchronous, actor-based, fast, lightweight, modular and testable it's a great way to connect your Scala applications to the world. Our visitors often compare HBase and Oracle with MongoDB, Cassandra and Elasticsearch. For specifying how to read an HBase table, the existing class HCatTableInfo will be extended to contain an HBase Scan. The following are top voted examples for showing how to use com. DBMS > HBase vs. Quick overcap of HBase before we proceed-. 2, this class was retrofitted to implement the Map interface, making it a member of the Java Collections Framework. As we all know Apache Hbase is an distributed data store optimized for read performance and the optimized read performance come from having only one file per Column Family. These examples are extracted from open source projects. But before we dive deeper into installation nuts and bolts, here are some hbase preliminaries, that I feel I should include as a startup. When I debugged the code, I came to know that zookeeper was returning the address of hmaster as localhost. Please select another system to include it in the comparison. Use it when you need random, realtime read/write access to your Big Data. Alert: Welcome to the Unified Cloudera Community. I have configured Apache hbase. org Subject: Re: Java api to apply limit in scan Also, if you know you only want 2 rows, for example, make sure the caching is set to 2 so that it only reads that many on the RegionServer. IOException Returns: string representing the rest api's version Throws: java. As advocated by big data overlord Nathan Marz, HBase has no notion of deletes; new values are just appended. Class HBaseAdmin. create a table, scan some data…) are coming from the ‘hue’ user and not the actual Web user. This is typically seen when mixing one or more prefixed descriptors with a large list of columns. localdomain, so the client was trying to search for the hmaster locally. Extensible jruby-based (JIRB) shell; Replication across the data center. Its been replaced by stargate. Tables in HBase can serve as the input and output for MapReduce jobs run in Hadoop, and may be accessed through the Java API but also through REST, Avro or Thrift gateway APIs. 98 Java通过api 操作hbase 0. This class belongs to the org. After graduating from the University of Science and Technology of China with a B. Clients interact with HBase via one of several available APIs, including a native Java API as well as a REST-based interface and several RPC interfaces (Apache Thrift, Apache Avro). For more information, kindly refer "Connect to the HBase cluster using HBase Java RPC API". 06/25/2019; 8 minutes to read +3; In this article. sh stop rest; To configure Kerberos authentication between REST clients and servers, see Configure Authentication for the HBase REST and Thrift Gateways. It is developed as part of Apache Software Foundation's Apache Hadoop project and runs on top of HDFS (Hadoop Distributed File System), providing BigTable-like capabilities for Hadoop. This is an important distinction to make, as the API will use the WAL and memstore, while bulk load is a short-circuit write and bypasses both. _x000D_ _x000D_ In 2008, he started looking over the. So, I spent some days to start this project and hope it can be helpful to our daily research work. Use the forms below and your advanced search query will appear here. HBase includes an Apache Thrift Proxy API, which allows you to write HBase applications in Python, C, C++, or another language that Thrift supports. Unlike relational database systems, HBase does not support a structured query language like SQL. Recently we worked with a customer, who was trying to use HBase Java API to interact with an HDInsight HBase cluster. DBMS > HBase vs. Next, you'll learn how to manipulate and access this data using the command line HBase shell as well as the HBase Java API. Before using HBase, we are familiar with MongoDB and pymongo. Our Hadoop tutorial is designed for beginners and professionals. x Release Versions. In this part of the HBase tutorial you will learn about operations using Java API, create table using Java API, exhibiting HBase using Java API, updating data using Java API, and more. The JVM is executable as simply java. Inserting Data Using JAVA API. When we want to migrate data from RDBMS external sources to HBase servers, HBase would require a new design. The Spark-HBase connector leverages Data Source API (SPARK-3247) introduced in Spark-1. Listing Tables Using Java API. I am running a simple HBASE JAva code to create a table but I am getting. Then use the application with HBase on Azure HDInsight. The API Server is a lightweight Web application that runs on your server and, when paired with the ADO. HBase Plugin for Eclipse helps the user to create a HBase Java API in one click. hbase java api demo. So, I spent some days to start this project and hope it can be helpful to our daily research work. You can vote up the examples you like and your votes will be used in our system to generate more good examples. Used to perform Get operations on a single row. There are many ways to get involved: Join the Gremlin-Users public mailing list. xml and hbase-site. This chapter will discuss the client APIs provided by HBase. I am very new to HBase development. HBase configuration directory Directory containing copies of core-site. Thrift API vs Java API. Contribute to datafibers/hbase_java_api development by creating an account on GitHub. 使用Java API和使用HBase shell本质上是没有任何区别的,都是HBase里面的DDL操作,所以我们本次使用的例子跟HBase Shell 练习里面的例子是一样的,在这里我们先贴出局部代码,大家不用着急,最后会把项目代码给大家的。 1)创建HBaseConfiguration来获取HBase的配置文件信息. In this section, we are going to perform some of the operations using Java coding through Java API. For the above I created a java project and added some jar files in the classpath of the project. 92 this method is deprecated without replacement. Given below are the steps to create a table in HBase using java API. Easy to use Java API for client access. Also, the users are free to keep up the pace without worrying about anything about the connectivity when the Hbase shell is deployed. rest REST server. To write data to HBase, you use methods of the HTableInterface class. We encourage you to learn about the project and contribute your expertise. createWriterInstance protected Writer createWriterInstance(Path path) throws java. xml URL to the configuration it fixes the problem too. It covers the following topics: Overview of the JMS API. Java Client API Overview • HBase is written in Java - No surprise that it has a Java Native API • Supports programmatic access to Data Manipulation Language (DML) - CRUD operations plus more • Everything that you can do with HBase Shell and more • Java Native API is the fastest way to access HBase 5 5. When i use ROWPREFIXFILTER in HBase Shell i retrieve data within 2 seconds. As we all know Apache Hbase is an distributed data store optimized for read performance and the optimized read performance come from having only one file per Column Family. Apache HBase Tutorial: Introduction to HBase. RemoteAdmin. If your application is in Java, then you should use the Java API. HBase is an open-source, column-oriented distributed database system in a Hadoop environment. HBasePutProcessor. The steps in this document use Apache Maven to create and build the project. Ruby, C++ can be used to access HBase. About This Course Get an overview of HBase, how to use the HBase API and Clients, its integration with Hadoop. Filters in HBase Shell and Filter Language was introduced in Apache HBase zero. These examples are extracted from open source projects. Subclasses of Object may override this definition. HBase runs on top of HDFS (Hadoop Distributed File System) and provides BigTable like capabilities to Hadoop. In this article, I will introduce how to use hbase-spark module in the Java or Scala client program. Querying HBase with many filters can cause performance degredation. I use the PrefixFilter on a Scanner to retrieve data. Its been replaced by stargate. 0 License, and code samples are licensed under the Apache 2. Note that when using a prefix like friends:bob_*, explicit HBase filters are set for all columns and prefixes specified. HBase java api 手册 评分: 对HBase 的 java 编程接口提供详细全面的解释,资源为英文版。 HBase Hadoop HDFS 手册 java api 2011-03-23 上传 大小: 2. Simplifies the use of HBase and helps to avoid common errors. HBase is an open source, multidimensional, distributed, scalable and a NoSQL database written in Java. Usually this means make sure the client can find your hbase-site. Java Code Examples for org. Create highly available HBase tables programmatically, using the Java API, as shown in the following example:. This topics describes the supported Apache HBase Java APIs used for CRUD operations on MapR Database binary tables. Similarly using Java API, you can call tableExists() method of the HBaseAdmin class to verify the existence of a table in HBase. Used to perform Get operations on a single row. HBase is a data model that is similar to Google’s big table designed to provide quick random access to huge amounts of structured data. 【版权声明】本文为华为云社区用户原创内容,转载时必须标注文章的来源(华为云社区),文章链接,文章作者等基本信息,否则作者和本社区有权追究责任。. Block cache and Bloom Filters for real-time queries. HBase Java API Demo. Since HBase has a Java Native API and it is written in Java thus it offers programmatic access to DML (Data Manipulation Language). We will see how to Insert,read,update,delete Data into or from HBase Table Using Java API. HBaseの操作をするなんちゃってクライアントAPIを作ってみた。日光が入ると暑くなるので昼間からカーテンを締め切り、HBaseと戯れる短い夏休み…。どうなんだろう。まぁ、いいや。 環境はいつものCDH4. It also describes. The trivial example in the previous section queried little endian-encoded data in HBase. For serious applications, you need to understand how to work with HBase byte arrays. This has been an open HBase JIRA, HBASE-7129, since November 2012. 0 has been released, just in time for ApacheCon NA 2011! The 1. Use the Hadoop UserGroupInformation API for keytab login before you call HBase APIs, run kinit for ticket cache login, or run Java programs. This document assumes a few things about your environment in order to simplify the examples. It is column oriented and horizontally scalable. To query HBase data: Connect the data source to Drill using the HBase storage plugin. Our Hadoop tutorial is designed for beginners and professionals. HBase tables are not highly available by default. There is no support for partial keys completely in HBase. I’m working on Java Code with New API, then faced issues that exactly as same as your previous iss…. JAVA API访问Hbase org. Using the Apache HBase REST API. caching 1 Number of rows that will be fetched when calling next on a scanner if it is not served from memory. Step 1: Instantiate the Configuration Class. Our HBase tutorial is designed for beginners and professionals. Hadoop works well with update 16 however there is a bug in JDK versions before update 19 that has been seen on HBase. I have to communicate with hbase via java API. Once you have a running HBase, you probably want a way to hook your application up to it. To use this information in a Java application, you can follow the steps in Use Apache Maven to build Java applications that use Apache HBase with HDInsight (Hadoop) to create an application. Redis (/ ˈ r ɛ d ɪ s /; Remote Dictionary Server) is an in-memory data structure project implementing a distributed, in-memory key-value database with optional durability. xml in my local path. sh Script for Windows and Linux / Unix environments to set up the working environment for HBase, including the location of Java, Java options, and other environment variables. And I am using OSX. The whole project is attached here:HBase-Spark. Currently i'm trying to communicate with Hbase from. xml from remote cluster you are trying to access. Here in this part of the HBase tutorial you will learn the basics of client API, CRUD operations, KeyValue Class, application for inserting data into database, application for retrieving data from database, row locks and more. NET environment and the only option that i have is Thrift. It is now tested under HBase 1. This package provides fully-functional exemplar Java code demonstrating simple usage of the hbase-client API, for incorporation into a Maven archetype with hbase-shaded-client dependency. Filters are generally used using the Java API, but can be used from HBase Shell for testing and debugging purposes. This document assumes a few things about your environment in order to simplify the examples. x of the HBase API. The steps in this document use Apache Maven to create and build the project. Even thought the API is documented with JavaDoc, the MSDN style sample-codes are pretty much missing from everywhere. And I am using OSX. HBase Phoenix JDBC example by Steve • November 4, 2014 • 1 Comment Phoenix is an apache project that attempts to provide an ANSI SQL standard interface to HBase data. Our Hadoop tutorial is designed for beginners and professionals. For a given endpoint, the HTTP verb controls the type of operation (create, read, update, or delete). spray is an open-source toolkit for building REST/HTTP-based integration layers on top of Scala and Akka. About this Course. Hbase is an open source framework provided by Apache. HBase JAVA API - Schema操作. 有没有人出现过这种情况,就是使用java对HBASE进行连接的时候可以连接上,但是所花的时间都是20秒左右(不管是连接Linux上的HBASE还是自己windows上的HBASE都要20秒左右),不知道是什么原因导致的,时间都花在连接数据库上了,Java代码运行的时候也没有报任何的错误 habse安装的是单机版的,版本是1. Former HCC members be sure to read and learn how to activate your account here. Currently i'm trying to communicate with Hbase from. The only difference between these two is Java API use java code to connect with HBase and shell mode use shell commands to connect with HBase. This package provides fully-functional exemplar Java code demonstrating simple usage of the hbase-client API, for incorporation into a Maven archetype with hbase-shaded-client dependency. Contribute to datafibers/hbase_java_api development by creating an account on GitHub. You can create a table in HBase using the createTable() method of HBaseAdmin class. Zeolearn Academy brings you a detailed HBase training designed specifically for Big Data developers. Using HBase REST API with the Knox Java client I’ve already introduced Knox in a previous post in order to deploy Spark Job with Knox using the Java client. Introduction to Filters; The two prominent read functions for HBase are get() and scan(), both supporting either direct access to data or the use of a start and end key. Ok, since it builds now, let's finish this review :o) I hereby approve of hbase inclusion in Fedora Packages Collections as it complies with Fedora generic and Java packaging guidelines. HBase applications are written in Java™ much like a typical Apache MapReduce application. Hi Pratap, With respect to error you are getting , it seems like Google guava jar is missing from HBase libs folder. 1 incorporates a number of significant enhancements over the previous major release line (hadoop-3. HBase Java API 基本操作. It can store massive. HBASE JAVA API issues. xml for using HBase JAVA API. Checkandput allows us to compare and then set the value of a row. Use LoadIncrementalHFiles instead. DBMS > HBase vs. A table in HBase can be created using the createTable() method of HBaseAdmin class. 2:compile (default-compile) on. This topic describes the supported methods in the Apache HBase Java API library. To view or change the HBase storage plugin configuration, use the Drill Web UI. Hbase Java API. To further narrow the scope of what to Get, use the methods below. Azure HDInsight is a managed Apache Hadoop service that lets you run Apache Spark, Apache Hive, Apache Kafka, Apache HBase, and more in the cloud. hbase(main):002:0> list TABLE emp 2 row(s) in 0. The first one to examine is the write-heavy workload. Here we can see Hadoop broken into a number of modules, but it’s best to simply think of Hadoop as a large set of jobs to be completed over a large cluster. - Experience of working in startups and small size companies owning product. Reading Data Using Java API. Create highly available HBase tables programmatically, using the Java API, as shown in the following example:. HBase provides java API to communicate with HBase. The HBase ODBC driver accepts an application’s SQL queries which generates execution plans and transforms them into calls to HBase’s REST API. Drill supports HBase version 1. NET environment and the only option that i have is Thrift. I have 4 region servers. The client is compatible with versions 1. Basic JMS API Concepts. If your application is in Java, then you should use the Java API. Extensible jruby-based (JIRB) shell; Replication across the data center. To understand this article, users need to have knowledge of hbase, spark, java and scala. HBase is an essential part of our Hadoop ecosystem. HBase is an open source, multidimensional, distributed, scalable and a NoSQL database written in Java. It is possible to host very large tables on top of clusters of commodity hardware with Apache HBase. This topics describes the supported Apache HBase Java APIs used for CRUD operations on MapR-DB binary tables. example makes rows from the HBase table bar available via the Hive table foo. If you will run the following command (hadoop classpath) then you will be able to see that by default the HBase JARs will not be added to the "hadoop" command line utility. Most Use cases of Apache HBase are: While we want to have random, real-time read/write access to Big Data, we use Apache HBase. Java Message Service Concepts. Alert: Welcome to the Unified Cloudera Community. xml, hdfs-site. HBase configuration directory Directory containing copies of core-site. HBaseAdmin • Recall that only Table and Family names have to be pre-defined – Columns can be added/deleted dynamically – HBase scheme roughly equals table definitions and their column families 5 5. This means that the ZooKeeper quorum to use must be on the client CLASSPATH. Use the forms below and your advanced search query will appear here. It also describes. Introduction to HBase Apache HBase is an open-source, distributed, versioned, non-relational database modeled after Google’s Bigtable: A Distributed Storage System for Structured Data. x release version. HBase JAVA Client API is much faster than HBase REST API especially for multi-Get operations. CRUD operations in the shell and with the Java API, Filters, Counters, MapReduce Implement your own notification service for a social network using HBase. Pro Apache Phoenix: An SQL Driver for HBase (2016) by Shakil Akhtar, Ravi Magham Apache HBase Primer (2016) by Deepak Vohra HBase in Action (2012) by Nick Dimiduk, Amandeep Khurana. The following are top voted examples for showing how to use com. The main feature of it are following: data type mapping: mapping java type to hbase's bytes back and forth. Java client for the hbase REST API Modern open source projects frequently lack documentation and so does hbase regarding its REST API. 之前我们是这样获取数据的: 那么问题来了,我们想要获取多条数据,比如说查询1万条数据怎么办呢? 可能我们第一时间就会想到循环,例如: 这样做是非常低效的,如果有10000条数. - Experience of working in startups and small size companies owning product. 0 release of Tika removes all deprecated pre 1. Code to smoke test connectivity The below program acts as a smoke test for the connectivity to HBase Deploy Jar up the generated class (using maven is of great help). The examples are extracted from open source Java projects. The steps in this document use Apache Maven to create and build the project. use_hbase_lib set to True, a user would have to write a wrapper script and launch that as a Shell action instead. Java Management Extensions (JMX) is a Java technology that supplies tools for managing and monitoring applications, system objects, devices (such as printers) and service-oriented networks. IOException; Method Detail. Update: An interview on Phoenix with James Taylor, Lead Developer at Salesforce. HBase runs on top of HDFS (Hadoop Distributed File System) and provides BigTable like capabilities to Hadoop. pdf), Text File (. hbase shell can work no problem in remote server. txt) or view presentation slides online. Apache HBase is needed for real-time Big Data applications. The JVM is executable as simply java. Hadoop is an open source framework. Still we can try old API but that’s not good practice. This topic describes the supported methods in the Apache HBase Java API library. And now we ready to write some code which will show how to manipulate data in HBase. These examples are extracted from open source projects. Currently i'm trying to communicate with Hbase from. - 13+ years of Java experience – Web/API development, big data. So, here, we are describing the referenced Java Admin API below, that covers the tasks used for managing tables. Pro Apache Phoenix: An SQL Driver for HBase (2016) by Shakil Akhtar, Ravi Magham Apache HBase Primer (2016) by Deepak Vohra HBase in Action (2012) by Nick Dimiduk, Amandeep Khurana. I have written simple code to add a new column family in existing hbase table. IOException Returns: string representing the rest api's version Throws: java. We can observe in the below image that by using HBase "list" command, we are listing the tables present in the HBase default database. Hbase is an open source framework provided by Apache. This means that the ZooKeeper quorum to use must be on the client CLASSPATH. plugins:maven-compiler-plugin:2. IOException; import org. HBase is really tough for querying. @Deprecated public class LoadIncrementalHFiles extends LoadIncrementalHFiles. hbase java api demo. Class HBaseAdmin. the following code does not seem to run in an. The Apache™ Hadoop® project develops open-source software for reliable, scalable, distributed computing. Apache HBase is needed for real-time Big Data applications. There are two main ways to get data into HBase: either through an API (Java, Thrift, or REST) or by using bulk load. The Java API provides the most functionality, but many people want to use HBase without Java. Write Data to HBase Table: JAVA API In this step, we are going to write data into HBase table "guru99" First, we have to write code for insert and retrieve values from HBase by using- HBaseLoading. Former HCC members be sure to read and learn. HBase Architecture: HBase Data Model. Before using HBase, we are familiar with MongoDB and pymongo. To stop a running HBase REST server, use the following command: $ bin/hbase-daemon. • In order to start the HBase shell, you should type the command, HBase Shell • Create a table • Using Put Command where you have to mention table name, row key, column family and qualifier. Therefore it provides programmatic access to Data Manipulation Language (DML). It executes core HBase workflow, leaving application code to invoke actions and extract results. 基本学习 hbase java api js基本学习 的基本学习 linux基本学习 JAVA 基础 学习 Java基础学习 Java基础学习练习 hbase java api操作 Java API读写Hbase Java API学习 java API 学习 HBase学习 hbase学习 hbase学习 hbase学习 HBase学习 HBase学习 Hadoop Hbase学习 Java基本内存学习 Hadoop Java java api 学习 HBase进阶学习(二)--API使用 hbase java. HBase Tutorial for Beginners | How to Interact with HBase Using Java API Part 1 | HBase Tutorial - Duration: 17:36. In this section, we are going to perform some of the operations using Java coding through Java API. example makes rows from the HBase table bar available via the Hive table foo. You can vote up the examples you like and your votes will be used in our system to generate more good examples. txt) or view presentation slides online. Let's see a HBase example to import data of a file in HBase table. sh Script for Windows and Linux / Unix environments to set up the working environment for HBase, including the location of Java, Java options, and other environment variables. In this tutorial, we'll be looking at the HBase Java Client/Admin library classes. The client APIs provide both DDL (data definition language) and DML (data manipulation language) semantics very much like what you find in SQL for relational databases. sh stop rest; To configure Kerberos authentication between REST clients and servers, see Configure Authentication for the HBase REST and Thrift Gateways. Use LoadIncrementalHFiles instead. Hbase Java API. Update: An interview on Phoenix with James Taylor, Lead Developer at Salesforce. HBaseAdmin is a class representing the Admin. Apache HBase is the Hadoop database. IOException; import org. A sample hbase-site. Apache Hadoop 3. The HBase REST server exposes endpoints that provide CRUD (create, read, update, delete) operations for each HBase process, as well as tables, regions, and namespaces. 0 release of Tika removes all deprecated pre 1. Java Management Extensions (JMX) is a Java technology that supplies tools for managing and monitoring applications, system objects, devices (such as printers) and service-oriented networks. Presently, java developers go through the Hive meta store (HMS) client interface to issue HCatalog DDl commands. Define Different Filter Types and Apply Them to Applications Use Counters on Incremental Occurrences. If a thread-safe implementation is not needed, it is recommended to use HashMap in place of Hashtable. 1 Filters HBase filters are a powerful feature that can greatly enhance your effectiveness when working with data stored in tables. Clients can access HBase data through either a native Java API or through a Thrift or REST gateway, making it accessible by any language. Users can use the client API directly or access it through proxy that translate request into API call.