| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.flink.kubernetes.utils; |
| |
| import org.apache.flink.runtime.resourcemanager.exceptions.ResourceManagerException; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.function.Supplier; |
| |
| /** |
| * Utils for retrying to execute. |
| */ |
| public class RetryUtils { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(RetryUtils.class); |
| |
| public static <T> Object run(Supplier<T> function, int retryTimes, long retryIntervalMs) |
| throws ResourceManagerException { |
| try { |
| return function.get(); |
| } catch (Exception e) { |
| LOG.error("Run failed, will be retried {} times with interval {} ms.", |
| retryTimes, retryIntervalMs, e); |
| return retry(function, retryTimes, retryIntervalMs); |
| } |
| } |
| |
| public static <T> Object retry(Supplier<T> function, int retryCount, long retryIntervalMs) |
| throws ResourceManagerException { |
| while (0 < retryCount) { |
| try { |
| return function.get(); |
| } catch (Exception e) { |
| retryCount--; |
| if (retryCount == 0) { |
| LOG.error("Retry failed and reached the maximum retried times."); |
| throw new ResourceManagerException(e); |
| } |
| LOG.error("Retry failed, will retry {} times with interval {} ms.", retryCount, retryIntervalMs, e); |
| try { |
| Thread.sleep(retryIntervalMs); |
| } catch (InterruptedException e1) { |
| throw new ResourceManagerException(e1); |
| } |
| } |
| } |
| return null; |
| } |
| |
| } |