diff --git a/spring-cloud-function-context/src/main/java/org/springframework/cloud/function/utils/SocketUtils.java b/spring-cloud-function-context/src/main/java/org/springframework/cloud/function/utils/SocketUtils.java new file mode 100644 index 000000000..f83beb913 --- /dev/null +++ b/spring-cloud-function-context/src/main/java/org/springframework/cloud/function/utils/SocketUtils.java @@ -0,0 +1,38 @@ +/* + * Copyright 2022-2022 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 + * + * https://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.springframework.cloud.function.utils; + +import java.net.ServerSocket; + +public final class SocketUtils { + + private SocketUtils() { + } + + public static int findAvailableTcpPort() { + try { + ServerSocket s = new ServerSocket(0); + int port = s.getLocalPort(); + s.close(); + return port; + } + catch (Exception e) { + // ignore + } + return 0; + } +}