/*
* Copyright 2014 the original author or 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 org.gradle.tooling;
import org.gradle.api.Incubating;
/**
* A {@code CancellationTokenSource} allows you to issue cancellation requests to one or more {@link org.gradle.tooling.LongRunningOperation}
* instances. To use a token source:
*
* <ul>
* <li>Create a token source using {@link GradleConnector#newCancellationTokenSource()}.</li>
* <li>Attach the token to one or more operations using {@link org.gradle.tooling.LongRunningOperation#withCancellationToken(CancellationToken)}.
* You need to do this before you start the operation.
* </li>
* <li>Later, you can cancel the associated operations by calling {@link #cancel()} on this token source.</li>
* </ul>
*
* <p>All implementations of this interface are required to be thread safe.</p>
*
* @since 2.1
*/
@Incubating
public interface CancellationTokenSource {
/**
* Initiates cancel request. All operations that have been associated with this token will be cancelled.
*
* <p>It is assumed that the implementation will do 'best-effort' attempt to perform cancellation.
* This method returns immediately and if the cancellation is successful the cancelled operation
* will notify its {@link org.gradle.tooling.ResultHandler#onFailure(GradleConnectionException)}
* with a {@link BuildCancelledException} describing how it was cancelled.
* </p>
*/
void cancel();
/**
* Returns a token associated with this {@code CancellationTokenSource}.
* Always returns the same instance.
*
* @return The cancellation token.
*/
CancellationToken token();
}