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Editor to share with you how to achieve hbase list paging, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

The paging implementation of HBase is relatively complex. The core idea is to combine the paging filter PageFilter (pageSize) and the query setting starting line scan.setStartRow (lastRow). LastRow is the last query rowkey. It should be noted that the rowkey is an array that corresponds to the storage location of multiple fields.

Different users log in to produce different lastRow, so we store lastRow in session

In order to decouple, we encapsulate the operation of lastRow into HBaseDaoImpl, so that developers do not need to care about the operation of lastRow when writing code.

Public PageInfo searchXControl (QueryControlRuleQO qo,IntegerpageSize,Integer currteIndex) throwsException {

/ / conditional filter

FilterList filterList = new QueryControlRuleFilterList (qo). GetFilterList ()

/ / Total number of eligible results obtained

Long total = getTotal (controlTableName, filterList)

/ / filter collection

FilterList fl=new FilterList ()

/ / paging filter

Filterfilter = new PageFilter (pageSize)

Fl.addFilter (filterList)

Fl.addFilter (filter)

/ / encapsulate the result set

List list = getList (XControl.class, controlTableName, fl, currteIndex)

Log.info ("- total:" + list.size ())

/ / return the result set

PageInfo page = new PageInfo (total, list)

Return page

}

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