/*
 * Copyright 2009 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.api.execution;

import org.gradle.api.Task;
import org.gradle.api.tasks.TaskState;
import org.gradle.internal.service.scopes.EventScope;
import org.gradle.internal.service.scopes.Scopes;

/**
 * <p>A {@code TaskExecutionListener} is notified of the execution of the tasks in a build.</p>
 *
 * <p>You can add a {@code TaskExecutionListener} to a build using {@link org.gradle.api.execution.TaskExecutionGraph#addTaskExecutionListener}
 */
@EventScope(Scopes.Build.class)
public interface TaskExecutionListener {
    /**
     * This method is called immediately before a task is executed.
     *
     * @param task The task about to be executed. Never null.
     */
    void beforeExecute(Task task);

    /**
     * This method is called immediately after a task has been executed. It is always called, regardless of whether the
     * task completed successfully, or failed with an exception.
     *
     * @param task The task which was executed. Never null.
     * @param state The task state. If the task failed with an exception, the exception is available in this
     * state. Never null.
     */
    void afterExecute(Task task, TaskState state);
}
