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Provides common utility functions

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/*
 * Copyright (c) CQSE GmbH
 *
 * 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.conqat.lib.commons.net;

import java.io.IOException;
import java.net.ServerSocket;

/**
 * Utility methods used in conjunction with sockets.
 * 
 * @author hummelb
 */
public class SocketUtils {

	/** Checks whether the given TCP port is available. */
	public static boolean isFreePort(int portNumber) {
		try (ServerSocket socket = new ServerSocket(portNumber)) {
			socket.setReuseAddress(true);
			return true;
		} catch (IOException e) {
			return false;
		}
	}

	/** Returns a new free TCP port number */
	public static int getFreePort() throws IOException {
		try (ServerSocket socket = new ServerSocket(0)) {
			socket.setReuseAddress(true);
			return socket.getLocalPort();
		}
	}
}