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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1064) HBase REST xml/json improvements
Date Tue, 13 Jan 2009 20:05:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1064?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12663445#action_12663445
] 

stack commented on HBASE-1064:
------------------------------

Sounds like you've found a bug in the XML.  Seems bad you can't do multiple columns at once.

Maybe do as is for now.  Add fixing multiple column update as new issue that can be done after?

base64'ing is because you can't have binary in XML.  In JSON, you can carry binary, right?
 If so, no need base64ing JSON payloads.

Michael is working on cleaning up the json jar -- fixing licenses, etc.  Should have something
to add soon.

> HBase REST xml/json improvements
> --------------------------------
>
>                 Key: HBASE-1064
>                 URL: https://issues.apache.org/jira/browse/HBASE-1064
>             Project: Hadoop HBase
>          Issue Type: Improvement
>          Components: rest
>            Reporter: Brian Beggs
>         Attachments: hbase-1064-patch-v2.patch, hbase-1064-patch-v3.patch, json2.jar,
REST-Upgrade-Notes.txt, RESTPatch-pass1.patch
>
>
> I've begun work on creating a REST based interface for HBase that can use both JSON and
XML and would be extensible enough to add new formats down the road.  I'm at a point with
this where I would like to submit it for review and to get feedback as I continue to work
towards new features.
> Attached to this issue you will find the patch for the changes to this point along with
a necessary jar file for the JSON serialization.  Also below you will find my notes on how
to use what is finished with the interface to this point.
> This patch is based off of jira issues: 
> HBASE-814 and HBASE-815
> I am interested on gaining feedback on:
> -what you guys think works
> -what doesn't work for the project
> -anything that may need to be added
> -code style
> -anything else...
> Finished components:
> -framework around parsing json/xml input
> -framework around serialzing xml/json output
> -changes to exception handing
> -changes to the response object to better handle the serializing of output data
> -table CRUD calls
> -Full table fetching
> -creating/fetching scanners
> TODO:
> -fix up the filtering with scanners
> -row insert/delete operations
> -individual row fetching
> -cell fetching interface
> -scanner use interface
> Here are the wiki(ish) notes for what is done to this point:
> REST Service for HBASE Notes:
> GET / 
> -retrieves a list of all the tables with their meta data in HBase
> curl -v -H "Accept: text/xml" -X GET -T - http://localhost:60050/
> curl -v -H "Accept: application/json" -X GET -T - http://localhost:60050/
> POST / 
> -Create a table
> curl -H "Content-Type: text/xml" -H "Accept: text/xml" -v -X POST -T - http://localhost:60050/newTable
> <table>
>   <name>test14</name>
>   <columnfamilies>
>     <columnfamily>
>       <name>subscription</name>
>       <max-versions>2</max-versions>
>       <compression>NONE</compression>
>       <in-memory>false</in-memory>
>       <block-cache>true</block-cache>
>     </columnfamily>
>   </columnfamilies>
> </table>
> Response:
> <status><code>200</code><message>success</message></status>
> JSON:
> curl -H "Content-Type: application/json" -H "Accept: application/json" -v -X POST -T
- http://localhost:60050/newTable
> {"name":"test5", "column_families":[{
>              "name":"columnfam1",
>              "bloomfilter":true,
>              "time_to_live":10,
>              "in_memory":false,
>              "max_versions":2,
>              "compression":"", 
>              "max_value_length":50,
>              "block_cache_enabled":true
>           }
> ]}
> *NOTE* this is an enum defined in class HColumnDescriptor.CompressionType
> GET /[table_name]
> -returns all records for the table
> curl -v -H "Accept: text/xml" -X GET -T - http://localhost:60050/tablename
> curl -v -H "Accept: application/json" -X GET -T - http://localhost:60050/tablename
> GET /[table_name]
> -Parameter Action 
> 	metadata - returns the metadata for this table.
> 	regions - returns the regions for this table
> curl -v -H "Accept: text/xml" -X GET -T - http://localhost:60050/pricing1?action=metadata
> Update Table
> PUT /[table_name]
> -updates a table 
> curl -v -H "Content-Type: text/xml" -H "Accept: text/xml" -X PUT -T - http://localhost:60050/pricing1
>   <columnfamilies>
>     <columnfamily>
>       <name>subscription</name>
>       <max-versions>3</max-versions>
>       <compression>NONE</compression>
>       <in-memory>false</in-memory>
>       <block-cache>true</block-cache>
>     </columnfamily>
>     <columnfamily>
>       <name>subscription1</name>
>       <max-versions>3</max-versions>
>       <compression>NONE</compression>
>       <in-memory>false</in-memory>
>       <block-cache>true</block-cache>
>     </columnfamily>
>   </columnfamilies>
> curl -v -H "Content-Type: application/json" -H "Accept: application/json" -X PUT -T -
http://localhost:60050/pricing1
> {"column_families":[{
>              "name":"columnfam1",
>              "bloomfilter":true,
>              "time_to_live":10,
>              "in_memory":false,
>              "max_versions":2,
>              "compression":"", 
>              "max_value_length":50,
>              "block_cache_enabled":true
>           }, 
>           {
>              "name":"columnfam2",
>              "bloomfilter":true,
>              "time_to_live":10,
>              "in_memory":false,
>              "max_versions":2,
>              "compression":"", 
>              "max_value_length":50,
>              "block_cache_enabled":true
>           }
> ]}
> Delete Table
> curl -v -H "Content-Type: text/xml" -H "Accept: text/xml" -X DELETE -T - http://localhost:60050/TEST16
> creating a scanner
> curl -v -H "Content-Type: application/json" -H "Accept: application/json" -X POST -T
- http://localhost:60050/TEST16?action=newscanner
> //TODO fix up the scanner filters.
> response:
> xml:
> <scanner>
>   <id>
>     2
>   </id>
> </scanner>
> json:
> {"id":1}
> Using a scanner
> curl -v -H "Content-Type: application/json" -H "Accept: application/json" -X POST -T
- "http://localhost:60050/TEST16?action=scan&scannerId=<scannerID>&numrows=<num
rows to return>"
> This would be my first submission to an open source project of this size, so please,
give it to me rough.  =)
> Thanks.

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