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Posted to issues@hbase.apache.org by "Andrew Purtell (JIRA)" <ji...@apache.org> on 2014/07/19 03:07:38 UTC
[jira] [Resolved] (HBASE-3461) Hbase jdo module.
[ 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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