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From Pedro Boado <pedro.bo...@gmail.com>
Subject Re: How to insert Json records from Flume into Hbase table
Date Fri, 14 Feb 2020 12:27:32 GMT
If what you're looking after is not achievable by extracting fields through
regex (it looks like it should) and you are after full control over what's
written to HBase you're probably looking at writing your own serializer.

On Fri, 14 Feb 2020 at 11:05, Mich Talebzadeh <mich.talebzadeh@gmail.com>
wrote:

> Hi,
>
> I have an Hbase table 'trading:MARKETDATAHBASEBATCH'
>
> Kafka delivers topic rows into flume.
>
> This is a typical json row
>
> f2d7174e-6299-49a7-9e87-0d66c248e66b
> {"rowkey":"f2d7174e-6299-49a7-9e87-0d66c248e66b","ticker":"BP",
> "timeissued":"2020-02-14T08:54:13", "price":573.25}
>
> The rowkey is UUID
>
> The json.conf for Flume is as follows:
>
> # Describing/Configuring the sink
> JsonAgent.channels.hdfs-channel-1.type = memory
> JsonAgent.channels.hdfs-channel-1.capacity = 300
> JsonAgent.channels.hdfs-channel-1.transactionCapacity = 100
> JsonAgent.sinks.Hbase-sink.type = org.apache.flume.sink.hbase.HBaseSink
> JsonAgent.sinks.Hbase-sink.channel =hdfs-channel-1
> JsonAgent.sinks.Hbase-sink.table =trading:MARKETDATAHBASEBATCH
> JsonAgent.sinks.Hbase-sink.columnFamily=PRICE_INFO
> JsonAgent.sinks.Hbase-sink.serializer
> =org.apache.flume.sink.hbase.SimpleHbaseEventSerializer
> ##JsonAgent.sinks.Hbase-sink.serializer.regex =(.+),(.+),(.+),(.+)
> agent1.sinks.sink1.serializer.regex
> =[a-zA-Z0-9]*^C[a-zA-Z0-9]*^C[a-zA-Z0-9]*
> JsonAgent.sinks.Hbase-sink.serializer.rowKeyIndex  = ROW_KEY
> JsonAgent.sinks.Hbase-sink.serializer.colNames
> =ROW_KEY,ticker,timeissued,price
> JsonAgent.sinks.Hbase-sink.serializer.regexIgnoreCase = true
> JsonAgent.sinks.Hbase-sink.batchSize =100
>
> The problem is that the rows are inserted as follows
>
> defaultff90d8d3-d8c5-40ff-bc37-6ee1544988c1
> column=PRICE_INFO:pCol, timestamp=1581670394182,
> value={"rowkey":"a7464cf4-42a1-40b8-a597-a41fbc3b847f","ticker":"MRW",
> "timeissued":"2020-02-14T09:03:46", "price":317.13}
>
> So it creates a default rowkey value
> "defaultff90d8d3-d8c5-40ff-bc37-6ee1544988c1" followed by json values all
> in value column
>
> Ideally I would like something similar to below:
>
> hbase(main):085:0> put 'trading:MARKETDATAHBASEBATCH',
> "8b97d3b9-e87b-4f21-9879-b43c4dcccb37", 'PRICE_INFO:rowkey',
> "8b97d3b9-e87b-4f21-9879-b43c4dcccb37"
> hbase(main):086:0> put 'trading:MARKETDATAHBASEBATCH',
> "8b97d3b9-e87b-4f21-9879-b43c4dcccb37", 'PRICE_INFO:ticker', "ORCL"
> hbase(main):087:0> put 'trading:MARKETDATAHBASEBATCH',
> "8b97d3b9-e87b-4f21-9879-b43c4dcccb37", 'PRICE_INFO:timeissued',
> "2020-02-14T09:57:32"
> hbase(main):001:0> put 'trading:MARKETDATAHBASEBATCH',
> "8b97d3b9-e87b-4f21-9879-b43c4dcccb37", 'PRICE_INFO:price' ,22.12
> hbase(main):002:0> get 'trading:MARKETDATAHBASEBATCH',
> "8b97d3b9-e87b-4f21-9879-b43c4dcccb37"
> COLUMN                                                         CELL
>  PRICE_INFO:price
> timestamp=1581676221846, value=22.12
>  PRICE_INFO:rowkey
> timestamp=1581675986932, value=8b97d3b9-e87b-4f21-9879-b43c4dcccb37
>  PRICE_INFO:ticker
> timestamp=1581676103443, value=ORCL
>  PRICE_INFO:timeissued
> timestamp=1581676168656, value=2020-02-14T09:57:32
>
> Any advice would be appreciated.
>
> Thanks,
>
> Mich
>
> *Disclaimer:* Use it at your own risk. Any and all responsibility for any
> loss, damage or destruction of data or any other property which may arise
> from relying on this email's technical content is explicitly disclaimed.
> The author will in no case be liable for any monetary damages arising from
> such loss, damage or destruction.
>


-- 
Un saludo.
Pedro Boado.

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