com.google.common.util.concurrent.super.com.google.common.util.concurrent.InterruptibleTask Maven / Gradle / Ivy
/*
* Copyright (C) 2015 The Guava Authors
*
* 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.google.common.util.concurrent;
import static com.google.common.util.concurrent.NullnessCasts.uncheckedCastNullableTToT;
/** Emulation for InterruptibleTask in GWT. */
abstract class InterruptibleTask implements Runnable {
@Override
public void run() {
T result = null;
Throwable error = null;
if (isDone()) {
return;
}
try {
result = runInterruptibly();
} catch (Throwable t) {
error = t;
}
if (error == null) {
// The cast is safe because of the `run` and `error` checks.
afterRanInterruptiblySuccess(uncheckedCastNullableTToT(result));
} else {
afterRanInterruptiblyFailure(error);
}
}
abstract boolean isDone();
abstract T runInterruptibly() throws Exception;
abstract void afterRanInterruptiblySuccess(T result);
abstract void afterRanInterruptiblyFailure(Throwable error);
final void interruptTask() {}
abstract String toPendingString();
}