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/**
* The MIT License (MIT)
*
* Copyright (c) 2019 nobark (tools4j), Marco Terzer, Anton Anufriev
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.tools4j.nobark.loop;
/**
* Handler for unexpected exceptions thrown by a {@link Step} in a {@link Loop}.
*/
@FunctionalInterface
public interface ExceptionHandler {
/**
* Handles an unexpected exception that was thrown by the given {@code step} that is part of the given {@code loop}.
*
* @param loop the loop which the failed step is part of
* @param step the step that throws the specified exception
* @param throwable the exception thrown by step
*/
void handleException(Loop loop, Step step, Throwable throwable);
/**
* {@link Step#perform() Performs} the step's method handling possible exceptions by invoking this handler's
* {@link #handleException(Loop, Step, Throwable)} method.
*
* @param loop the loop to which the step belongs
* @param step the step to perform
* @return true if work was performed by the step, and false otherwise or if an exception was caught
*/
default boolean performQuietly(final Loop loop, final Step step) {
try {
return step.perform();
} catch (final Throwable t) {
handleException(loop, step, t);
return false;
}
}
}
