com.github.robozonky.app.daemon.SimpleSkippable Maven / Gradle / Ivy

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/*
 * Copyright 2019 The RoboZonky Project
 *
 * 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 com.github.robozonky.app.daemon;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import javax.ws.rs.NotAuthorizedException;
import java.util.function.Consumer;

final class SimpleSkippable implements Runnable {

    private static final Logger LOGGER = LogManager.getLogger(SimpleSkippable.class);

    private final Class type;
    private final Runnable toRun;
    private final Consumer shutdownCall;

    SimpleSkippable(final Runnable toRun, final Class type, final Consumer shutdownCall) {
        this.toRun = toRun;
        this.type = type;
        this.shutdownCall = shutdownCall;
    }

    SimpleSkippable(final Runnable toRun, final Consumer shutdownCall) {
        this(toRun, toRun.getClass(), shutdownCall);
    }

    SimpleSkippable(final Runnable toRun) {
        this(toRun, t -> {
            // do nothing
        });
    }

    static boolean isRecoverable(Throwable throwable) {
        if (throwable == null) {
            return true;
        } else if (throwable instanceof Error || throwable instanceof NotAuthorizedException) {
            return false;
        } else {
            return isRecoverable(throwable.getCause());
        }
    }

    @Override
    public void run() {
        LOGGER.trace("Running {}.", this);
        try {
            toRun.run();
            LOGGER.trace("Successfully finished {}.", this);
        } catch (final Throwable t) {
            if (isRecoverable(t)) {
                LOGGER.debug("Failed executing {}.", this, t);
            } else {
                shutdownCall.accept(t);
                throw t; // rethrow the error
            }
        }
    }

    @Override
    public String toString() {
        return "SimpleSkippable{" +
                "type=" + type.getCanonicalName() +
                '}';
    }
}