Package com.illumon.iris.db.v2

Class WouldMatchOperation

java.lang.Object

com.illumon.iris.db.v2.WouldMatchOperation

All Implemented Interfaces:

QueryTable.MemoizableOperation, QueryTable.Operation

public class WouldMatchOperation
extends Object
implements QueryTable.MemoizableOperation

A table operation similar to Table.where(String...) except that instead of filtering the rows in the table, it appends new columns containing the result of the filter evaluation on each row of the table. It will re-evaluate cell values if any of the underlying filters are dynamic, and change.

Nested Class Summary

Nested classes/interfaces inherited from interface com.illumon.iris.db.v2.QueryTable.Operation

QueryTable.Operation.Result

Method Summary

Modifier and Type	Method	Description
String	getDescription()
String	getLogPrefix()
MemoizedOperationKey	getMemoizedOperationKey()
QueryTable.Operation.Result	initialize(boolean usePrev, long beforeClock)	Initialize this operation.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.illumon.iris.db.v2.QueryTable.Operation

newSwapListener

Method Details

getDescription

public String getDescription()

Specified by:

getDescription in interface QueryTable.Operation

Returns:

the description of this operation

getLogPrefix

public String getLogPrefix()

Specified by:

getLogPrefix in interface QueryTable.Operation

Returns:

the log prefix of this operation

initialize

public QueryTable.Operation.Result initialize(boolean usePrev, long beforeClock)

Description copied from interface: QueryTable.Operation

Initialize this operation.

Specified by:

initialize in interface QueryTable.Operation

Parameters:

usePrev - data from the previous cycle should be used (otherwise use this cycle)

beforeClock - the clock value that we captured before the function began; the function can use this value to bail out early if it notices something has gone wrong.

Returns:

the result table / listener if successful, null if it should be retried.

getMemoizedOperationKey

public MemoizedOperationKey getMemoizedOperationKey()

Specified by:

getMemoizedOperationKey in interface QueryTable.MemoizableOperation

Returns:

the key that should be used to memoize off of