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

Class RetryableLookupFunctionDelegator

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

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

org.apache.flink.table.functions.LookupFunction

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

All Implemented Interfaces:

Serializable, FunctionDefinition

public class RetryableLookupFunctionDelegator
extends LookupFunction

A delegator holds user's LookupFunction to handle retries.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
RetryableLookupFunctionDelegator(LookupFunction userLookupFunction, ResultRetryStrategy retryStrategy)

Method Summary

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

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

eval

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

collect, finish, getKind, getParameterTypes, getResultType, getTypeInference, setCollector

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

RetryableLookupFunctionDelegator

public RetryableLookupFunctionDelegator(@Nonnull
                                        LookupFunction userLookupFunction,
                                        @Nonnull
                                        ResultRetryStrategy retryStrategy)

Method Detail

lookup

public Collection<RowData> lookup(RowData keyRow)
                           throws IOException

Description copied from class: LookupFunction

Synchronously lookup rows matching the lookup keys.

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

Specified by:

lookup in class LookupFunction

Parameters:

keyRow - - A RowData that wraps lookup keys.

Returns:

A collection of all matching rows in the lookup table.

Throws:

IOException

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

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