Package io.deephaven.engine.table.impl

Class BlinkTableTools

java.lang.Object

io.deephaven.engine.table.impl.BlinkTableTools

public class BlinkTableTools
extends Object

Tools for manipulating blink tables.

See Also:

• Table.BLINK_TABLE_ATTRIBUTE

Field Summary

Fields

Modifier and Type	Field	Description
static final Object	DEFAULT_MEMO_KEY

Constructor Summary

Constructors

Constructor	Description
BlinkTableTools()

Method Summary

Modifier and Type	Method	Description
static Table	blinkToAppendOnly(@NotNull Table blinkTable, long sizeLimit)	Convert a Blink Table to an in-memory append only table with a limit on maximum size.
static Table	blinkToAppendOnly(@NotNull Table blinkTable, @Nullable Object memoKey)	Convert a Blink Table to an in-memory append only table.
static Table	blinkToAppendOnly(Table blinkTable)	Convert a Blink Table to an in-memory append only table.
static Table	blinkToAppendOnly(Table blinkTable, long sizeLimit, @Nullable Object memoKey)	Convert a Blink Table to an in-memory append only table with a limit on maximum size.
static boolean	hasBlink(@NotNull Map<String,Object> attributes)	Returns true if attributes indicate a blink table.
static boolean	isBlink(@NotNull Table table)	Returns true if table is a blink table.

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_MEMO_KEY

public static final Object DEFAULT_MEMO_KEY

Constructor Details

BlinkTableTools

public BlinkTableTools()

Method Details

blinkToAppendOnly

public static Table blinkToAppendOnly(Table blinkTable)

Convert a Blink Table to an in-memory append only table.

Note, this table will grow without bound as new blink table rows are encountered. The result is memoized under DEFAULT_MEMO_KEY.

Parameters:

blinkTable - The input blink table

Returns:

An append-only in-memory table representing all data encountered in the blink table across all cycles

blinkToAppendOnly

public static Table blinkToAppendOnly(@NotNull
 @NotNull Table blinkTable,
 @Nullable
 @Nullable Object memoKey)

Convert a Blink Table to an in-memory append only table.

Note, this table will grow without bound as new blink table rows are encountered.

Parameters:

blinkTable - The input blink table

memoKey - saves a weak reference to the result of the given operation under the given memoization key (null to disable memoization)

Returns:

An append-only in-memory table representing all data encountered in the blink table across all cycles

blinkToAppendOnly

public static Table blinkToAppendOnly(@NotNull
 @NotNull Table blinkTable,
 long sizeLimit)

Convert a Blink Table to an in-memory append only table with a limit on maximum size. Any updates beyond that limit won't be appended to the table.

The result is memoized under DEFAULT_MEMO_KEY.

Parameters:

blinkTable - The input blink table

sizeLimit - The maximum number of rows in the append-only table

Returns:

An append-only in-memory table representing all data encountered in the blink table across all cycles till maximum row count

blinkToAppendOnly

public static Table blinkToAppendOnly(Table blinkTable,
 long sizeLimit,
 @Nullable
 @Nullable Object memoKey)

Convert a Blink Table to an in-memory append only table with a limit on maximum size. Any updates beyond that limit won't be appended to the table.

Parameters:

blinkTable - The input blink table

sizeLimit - The maximum number of rows in the append-only table

memoKey - saves a weak reference to the result of the given operation under the given size limit and memoization key (null to disable memoization)

Returns:

An append-only in-memory table representing all data encountered in the blink table across all cycles till maximum row count

isBlink

public static boolean isBlink(@NotNull
 @NotNull Table table)

Returns true if table is a blink table.

Parameters:

table - The table to check for blink behavior

Returns:

Whether table is a blink table

See Also:

• Table.BLINK_TABLE_ATTRIBUTE

hasBlink

public static boolean hasBlink(@NotNull
 @NotNull Map<String,Object> attributes)

Returns true if attributes indicate a blink table.

Parameters:

attributes - The map to check for blink table attributes

Returns:

Whether attributes indicate a blink table

See Also:

• Table.BLINK_TABLE_ATTRIBUTE