org.apache.flink.table.runtime.operators.join.lookup

Class RetryableAsyncLookupFunctionDelegator

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

org.apache.flink.table.functions.AsyncTableFunction<RowData>

org.apache.flink.table.functions.AsyncLookupFunction

org.apache.flink.table.runtime.operators.join.lookup.RetryableAsyncLookupFunctionDelegator

All Implemented Interfaces:

Serializable, FunctionDefinition

public class RetryableAsyncLookupFunctionDelegator
extends AsyncLookupFunction

A delegator holds user's AsyncLookupFunction to handle retries.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
RetryableAsyncLookupFunctionDelegator(AsyncLookupFunction userLookupFunction, ResultRetryStrategy retryStrategy)

Method Summary

Modifier and Type	Method and Description
CompletableFuture<Collection<RowData>>	asyncLookup(RowData keyRow) Asynchronously lookup rows matching the lookup keys.
void	close() Tear-down method for user-defined function.
void	open(FunctionContext context) Setup method for user-defined function.

Methods inherited from class org.apache.flink.table.functions.AsyncLookupFunction

eval

Methods inherited from class org.apache.flink.table.functions.AsyncTableFunction

getKind, getTypeInference

Methods inherited from class org.apache.flink.table.functions.UserDefinedFunction

functionIdentifier, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.table.functions.FunctionDefinition

getRequirements, isDeterministic, supportsConstantFolding

Constructor Detail

RetryableAsyncLookupFunctionDelegator

public RetryableAsyncLookupFunctionDelegator(@Nonnull
                                             AsyncLookupFunction userLookupFunction,
                                             @Nonnull
                                             ResultRetryStrategy retryStrategy)

Method Detail

open

public void open(FunctionContext context)
          throws Exception

Description copied from class: UserDefinedFunction

Setup method for user-defined function. It can be used for initialization work. By default, this method does nothing.

Overrides:

open in class UserDefinedFunction

Throws:

Exception

asyncLookup

public CompletableFuture<Collection<RowData>> asyncLookup(RowData keyRow)

Description copied from class: AsyncLookupFunction

Asynchronously lookup rows matching the lookup keys.

Please note that the returning collection of RowData shouldn't be reused across invocations.

Specified by:

asyncLookup in class AsyncLookupFunction

Parameters:

keyRow - - A RowData that wraps lookup keys.

Returns:

A collection of all matching rows in the lookup table.

close

public void close()
           throws Exception

Description copied from class: UserDefinedFunction

Tear-down method for user-defined function. It can be used for clean up work. By default, this method does nothing.

Overrides:

close in class UserDefinedFunction

Throws:

Exception