| /* |
| * 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.solr.common.util; |
| |
| import java.lang.invoke.MethodHandles; |
| import java.util.Collections; |
| import java.util.Set; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.solr.common.SolrException; |
| import org.apache.solr.common.SolrException.ErrorCode; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class RetryUtil { |
| private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); |
| |
| public interface RetryCmd { |
| void execute() throws Throwable; |
| } |
| |
| public interface BooleanRetryCmd { |
| boolean execute(); |
| } |
| |
| public static void retryOnThrowable(@SuppressWarnings({"rawtypes"})Class clazz, long timeoutms, long intervalms, RetryCmd cmd) throws Throwable { |
| retryOnThrowable(Collections.singleton(clazz), timeoutms, intervalms, cmd); |
| } |
| |
| public static void retryOnThrowable(@SuppressWarnings({"rawtypes"})Set<Class> classes, |
| long timeoutms, long intervalms, RetryCmd cmd) throws Throwable { |
| long timeout = System.nanoTime() + TimeUnit.NANOSECONDS.convert(timeoutms, TimeUnit.MILLISECONDS); |
| while (true) { |
| try { |
| cmd.execute(); |
| } catch (Throwable t) { |
| if (isInstanceOf(classes, t) && System.nanoTime() < timeout) { |
| if (log.isInfoEnabled()) { |
| log.info("Retry due to Throwable, {} ", t.getClass().getName(), t); |
| } |
| Thread.sleep(intervalms); |
| continue; |
| } |
| throw t; |
| } |
| // success |
| break; |
| } |
| } |
| |
| private static boolean isInstanceOf(@SuppressWarnings({"rawtypes"})Set<Class> classes, Throwable t) { |
| for (@SuppressWarnings({"rawtypes"})Class c : classes) { |
| if (c.isInstance(t)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public static void retryUntil(String errorMessage, int retries, long pauseTime, TimeUnit pauseUnit, BooleanRetryCmd cmd) |
| throws InterruptedException { |
| while (retries-- > 0) { |
| if (cmd.execute()) |
| return; |
| pauseUnit.sleep(pauseTime); |
| } |
| throw new SolrException(ErrorCode.SERVER_ERROR, errorMessage); |
| } |
| |
| public static void retryOnBoolean(long timeoutms, long intervalms, BooleanRetryCmd cmd) { |
| long timeout = System.nanoTime() + TimeUnit.NANOSECONDS.convert(timeoutms, TimeUnit.MILLISECONDS); |
| while (true) { |
| boolean resp = cmd.execute(); |
| if (!resp && System.nanoTime() < timeout) { |
| continue; |
| } else if (System.nanoTime() >= timeout) { |
| throw new SolrException(ErrorCode.SERVER_ERROR, "Timed out while retrying operation"); |
| } |
| |
| // success |
| break; |
| } |
| } |
| |
| } |