FreePortFinder.java

/*-
 * #%L
 * io.earcam.utilitarian.net
 * %%
 * Copyright (C) 2017 earcam
 * %%
 * SPDX-License-Identifier: (BSD-3-Clause OR EPL-1.0 OR Apache-2.0 OR MIT)
 *
 * You <b>must</b> choose to accept, in full - any individual or combination of
 * the following licenses:
 * <ul>
 * 	<li><a href="https://opensource.org/licenses/BSD-3-Clause">BSD-3-Clause</a></li>
 * 	<li><a href="https://www.eclipse.org/legal/epl-v10.html">EPL-1.0</a></li>
 * 	<li><a href="https://www.apache.org/licenses/LICENSE-2.0">Apache-2.0</a></li>
 * 	<li><a href="https://opensource.org/licenses/MIT">MIT</a></li>
 * </ul>
 * #L%
 */
package io.earcam.utilitarian.net;

import java.net.ServerSocket;

import io.earcam.unexceptional.Closing;

public final class FreePortFinder {

	private FreePortFinder()
	{
		throw new IllegalStateException("not happening");
	}


	public static int findFreePort()
	{
		return Closing.closeAfterApplying(ServerSocket::new, 0, ServerSocket::getLocalPort);
	}
}