/*
 * Copyright (C) 2015 SoftIndex LLC.
 *
 * 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 io.datakernel.async;

public final class AsyncExecutors {
	private AsyncExecutors() {}

	public static AsyncExecutor sequentialExecutor() {
		return ParallelAsyncExecutor.create(1);
	}

	public static AsyncExecutor sequentialExecutor(int queueSaturationThreshold) {
		return ParallelAsyncExecutor.create(1).withQueueSaturationThreshhold(queueSaturationThreshold);
	}

	public static AsyncExecutor parallelExecutor(int maxParallelism) {
		return ParallelAsyncExecutor.create(maxParallelism);
	}

	public static AsyncExecutor parallelExecutor(int maxParallelism, int queueSaturationThreshold) {
		return ParallelAsyncExecutor.create(maxParallelism).withQueueSaturationThreshhold(queueSaturationThreshold);
	}

	public static AsyncExecutor immediateExecutor() {
		return new AsyncExecutor() {
			@Override
			public void submit(AsyncRunnable asyncRunnable, CompletionCallback callback) {
				asyncRunnable.run(callback);
			}

			@Override
			public boolean isSaturated() {
				return false;
			}
		};
	}
}