dlmarion commented on a change in pull request #2096: URL: https://github.com/apache/accumulo/pull/2096#discussion_r633491566
########## File path: server/base/src/main/java/org/apache/accumulo/server/compaction/RetryableThriftCall.java ########## @@ -0,0 +1,123 @@ +/* + * 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.accumulo.server.compaction; + +import org.apache.accumulo.fate.util.UtilWaitThread; +import org.apache.thrift.TException; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class RetryableThriftCall<T> { + + public static class RetriesExceededException extends Exception { + + private static final long serialVersionUID = 1L; + + public RetriesExceededException() { + super(); + } + + public RetriesExceededException(String message, Throwable cause, boolean enableSuppression, + boolean writableStackTrace) { + super(message, cause, enableSuppression, writableStackTrace); + } + + public RetriesExceededException(String message, Throwable cause) { + super(message, cause); + } + + public RetriesExceededException(String message) { + super(message); + } + + public RetriesExceededException(Throwable cause) { + super(cause); + } + + } + + private static final Logger LOG = LoggerFactory.getLogger(RetryableThriftCall.class); + public static final long MAX_WAIT_TIME = 60000; + + private final long start; + private final long maxWaitTime; + private int maxNumRetries; + private final RetryableThriftFunction<T> function; + private final boolean retryForever; + + /** + * RetryableThriftCall constructor + * + * @param start + * initial wait time + * @param maxWaitTime + * max wait time + * @param maxNumRetries + * number of times to retry, 0 to retry forever + * @param function + * function to execute + */ + public RetryableThriftCall(long start, long maxWaitTime, int maxNumRetries, + RetryableThriftFunction<T> function) { + this.start = start; + this.maxWaitTime = maxWaitTime; + this.maxNumRetries = maxNumRetries; + this.function = function; + this.retryForever = (maxNumRetries == 0); + } + + /** + * Attempts to call the function, waiting and retrying when TException is thrown. Wait time is + * initially set to the start time and doubled each time, up to the maximum wait time. If + * maxNumRetries is 0, then this will retry forever. If maxNumRetries is non-zero, then a + * RuntimeException is thrown when it has exceeded he maxNumRetries parameter. + * + * @return T + * @throws RetriesExceededException + * when maximum number of retries has been exceeded and the cause is set to the last + * TException + */ + public T run() throws RetriesExceededException { + long waitTime = start; Review comment: Resolved in 3983cd23629789c1ed0020d01fdd968eabfe590f -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
