io.github.theangrydev.businessflows.Peek Maven / Gradle / Ivy
/*
* Copyright 2016 Liam Williams .
*
* This file is part of business-flows.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.github.theangrydev.businessflows;
/**
* Similar to a {@link java.util.function.Consumer} but is allowed to throw an {@link Exception}.
*
* @param The type to look at
*/
@FunctionalInterface
public interface Peek {
/**
* Take a look at the instance if it is present.
*
* @param instance The instance to look at (if it is present)
* @throws Exception If there is a technical failure during the peek
*/
void peek(T instance) throws Exception;
}