Package software.amazon.awssdk.utils

Class FunctionalUtils

java.lang.Object

software.amazon.awssdk.utils.FunctionalUtils

public final class FunctionalUtils
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	FunctionalUtils.UnsafeConsumer<I>	Equivalent of Consumer that throws a checked exception.
static interface	FunctionalUtils.UnsafeFunction<T,R>	Equivalent of Function that throws a checked exception.
static interface	FunctionalUtils.UnsafeRunnable	Equivalent of Runnable that throws a checked exception.
static interface	FunctionalUtils.UnsafeSupplier<T>	Equivalent of Supplier that throws a checked exception.

Method Summary

Modifier and Type	Method	Description
static void	invokeSafely(FunctionalUtils.UnsafeRunnable unsafeRunnable)
static <T> T	invokeSafely(FunctionalUtils.UnsafeSupplier<T> unsafeSupplier)
static <T> Consumer<T>	noOpConsumer()
static Runnable	noOpRunnable()
static void	runAndLogError(org.slf4j.Logger log, String errorMsg, FunctionalUtils.UnsafeRunnable runnable)	Runs a given FunctionalUtils.UnsafeRunnable and logs an error without throwing.
static <I> Consumer<I>	safeConsumer(FunctionalUtils.UnsafeConsumer<I> unsafeConsumer)	A wrapper around a Consumer that throws a checked exception.
static <T,R> Function<T,R>	safeFunction(FunctionalUtils.UnsafeFunction<T,R> unsafeFunction)	Takes a functional interface that throws an exception and returns a Function that deals with that exception by wrapping in a runtime exception.
static Runnable	safeRunnable(FunctionalUtils.UnsafeRunnable unsafeRunnable)	A wrapper around a Runnable that throws a checked exception.
static <T> Supplier<T>	safeSupplier(FunctionalUtils.UnsafeSupplier<T> unsafeSupplier)	A wrapper around a BiConsumer that throws a checked exception.
static <I,O> Function<I,O>	toFunction(Supplier<O> supplier)

Methods inherited from class java.lang.Object

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

Method Detail

runAndLogError

public static void runAndLogError(org.slf4j.Logger log,
                                  String errorMsg,
                                  FunctionalUtils.UnsafeRunnable runnable)

Runs a given FunctionalUtils.UnsafeRunnable and logs an error without throwing.

Parameters:

errorMsg - Message to log with exception thrown.

runnable - Action to perform.

noOpConsumer

public static <T> Consumer<T> noOpConsumer()

Type Parameters:

T - Type of object to be consumed.

Returns:

A Consumer that does nothing.

noOpRunnable

public static Runnable noOpRunnable()

Returns:

A Runnable that does nothing.

safeConsumer

public static <I> Consumer<I> safeConsumer(FunctionalUtils.UnsafeConsumer<I> unsafeConsumer)

A wrapper around a Consumer that throws a checked exception.

Parameters:

unsafeConsumer - - something that acts like a consumer but throws an exception

Returns:

a consumer that is wrapped in a try-catch converting the checked exception into a runtime exception

safeFunction

public static <T,R> Function<T,R> safeFunction(FunctionalUtils.UnsafeFunction<T,R> unsafeFunction)

Takes a functional interface that throws an exception and returns a Function that deals with that exception by wrapping in a runtime exception. Useful for APIs that use the standard Java functional interfaces that don't throw checked exceptions.

Type Parameters:

T - Input

R - Output

Parameters:

unsafeFunction - Functional interface that throws checked exception.

Returns:

New Function that handles checked exception.

safeSupplier

public static <T> Supplier<T> safeSupplier(FunctionalUtils.UnsafeSupplier<T> unsafeSupplier)

A wrapper around a BiConsumer that throws a checked exception.

Parameters:

unsafeSupplier - - something that acts like a BiConsumer but throws an exception

Returns:

a consumer that is wrapped in a try-catch converting the checked exception into a runtime exception

safeRunnable

public static Runnable safeRunnable(FunctionalUtils.UnsafeRunnable unsafeRunnable)

A wrapper around a Runnable that throws a checked exception.

Parameters:

unsafeRunnable - Something that acts like a Runnable but throws an exception

Returns:

A Runnable that is wrapped in a try-catch converting the checked exception into a runtime exception

toFunction

public static <I,O> Function<I,O> toFunction(Supplier<O> supplier)

invokeSafely

public static <T> T invokeSafely(FunctionalUtils.UnsafeSupplier<T> unsafeSupplier)

invokeSafely

public static void invokeSafely(FunctionalUtils.UnsafeRunnable unsafeRunnable)