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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-3461) Hbase jdo module.
Date Sat, 19 Jul 2014 01:07:38 GMT

     [ https://issues.apache.org/jira/browse/HBASE-3461?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell resolved HBASE-3461.
-----------------------------------

    Resolution: Not a Problem

See external sources

> Hbase jdo module.
> -----------------
>
>                 Key: HBASE-3461
>                 URL: https://issues.apache.org/jira/browse/HBASE-3461
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.90.0
>            Reporter: ncanis
>         Attachments: HBaseExample.java, hbase-jdo-0.1-20100121.jar, hbase-jdo-examples-test-0.1-20100121.jar,
hbase-jdo-src-0.1-20100121.jar
>
>
> Hello.
> first of all, thanks to hbase members so much ,
> you helped me a lot.
> I wrote simple jdo module for hbase newbie. I wish this module can help them.
> Some features
> - simple jdo(used reflection)
> - HTable pool ( I already know HTablePool in habse )
> - simple query classes ( insert,delete,update,select)
> - some convinent mehtods.
> - table sequence generator
> I want to contribute this module to hbase
> absolutely, I'll do upgrade that more than more.
> again, thanks for help.
> [http://code.google.com/p/hbase-jdo/]
> ---------------------------------------------
> {code} 
> AbstractHBaseDBO dbo = new HBaseDBOImpl();
> 		
> 		//drop if table is already exist.
> 		if(dbo.isTableExist("user")){
> 			dbo.deleteTable("user");
> 		}
> 		
> 		//create table
> 		dbo.createTableIfNotExist("user",HBaseOrder.DESC,"account");
> 		//dbo.createTableIfNotExist("user",HBaseOrder.ASC,"account");
> 		
> 		//create index.
> 		String[] cols={"id","name"};
> 		dbo.addIndexExistingTable("user","account",cols);
> 		
> 		//insert
> 		InsertQuery insert = dbo.createInsertQuery("user");
> 		UserBean bean = new UserBean();
> 		bean.setFamily("account");
> 		bean.setAge(20);
> 		bean.setEmail("ncanis@gmail.com");
> 		bean.setId("ncanis");
> 		bean.setName("ncanis");
> 		bean.setPassword("1111");
> 		insert.insert(bean);
> 		
> 		//select 1 row
> 		SelectQuery select = dbo.createSelectQuery("user");
> 		UserBean resultBean = (UserBean)select.select(bean.getRow(),UserBean.class);
> 		
> 		// select column value.
> 		String value = (String)select.selectColumn(bean.getRow(),"account","id",String.class);
> 		
> 		// search with option (QSearch has EQUAL, NOT_EQUAL, LIKE)
> 		// select id,password,name,email from account where id='ncanis' limit startRow,20
> 		HBaseParam param = new HBaseParam();
> 		param.setPage(bean.getRow(),20);
> 		param.addColumn("id","password","name","email");
> 		param.addSearchOption("id","ncanis",QSearch.EQUAL);
> 		select.search("account", param, UserBean.class);
> 		
> 		// search column value is existing.
> 		boolean isExist = select.existColumnValue("account","id","ncanis".getBytes());
> 		
> 		// update password.
> 		UpdateQuery update = dbo.createUpdateQuery("user");
> 		Hashtable<String, byte[]> colsTable = new Hashtable<String, byte[]>();
> 		colsTable.put("password","2222".getBytes());
> 		update.update(bean.getRow(),"account",colsTable);
> 		
> 		//delete
> 		DeleteQuery delete = dbo.createDeleteQuery("user");
> 		delete.deleteRow(resultBean.getRow());
> 	
> 		////////////////////////////////////
> 		// etc
> 		
> 		// HTable pool with apache commons pool
> 		// borrow and release. HBasePoolManager(maxActive, minIdle etc..)
> 		IndexedTable table = dbo.getPool().borrow("user");
> 		dbo.getPool().release(table);
> 		
> 		// upload bigFile by hadoop directly.
> 		HBaseBigFile bigFile = new HBaseBigFile();
> 		File file = new File("doc/movie.avi");
> 		FileInputStream fis = new FileInputStream(file);
> 		Path rootPath = new Path("/files/");
> 		String filename = "movie.avi";
> 		bigFile.uploadFile(rootPath,filename,fis,true);
> 		
> 		// receive file stream from hadoop.
> 		Path p = new Path(rootPath,filename);
> 		InputStream is = bigFile.path2Stream(p,4096);
> {code} 



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