[GitHub] [incubator-ratis] lokeshj1703 commented on a change in pull request #63: RATIS-882. Implement ExponentialBackoffRetry.

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lokeshj1703 commented on a change in pull request #63:
URL: https://github.com/apache/incubator-ratis/pull/63#discussion_r415659683



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File path: ratis-common/src/main/java/org/apache/ratis/retry/ExponentialBackoffRetry.java
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@@ -0,0 +1,90 @@
+/*
+ * 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.ratis.retry;
+
+import org.apache.ratis.util.Preconditions;
+import org.apache.ratis.util.TimeDuration;
+
+import java.util.concurrent.ThreadLocalRandom;
+
+/**
+ * Retry Policy exponentially increases sleep time with randomness on successive
+ * retries. The sleep time is a geometric progression b*2, b*4, b*8, b*16...
+ * bounded by maximum configured duration.
+ *
+ * If sleep time calculated using the progression is s then randomness is added
+ * in the range [s*0.5, s*1.5).
+ */

Review comment:
       "The sleep time is a geometric progression b*2, b*4, b*8, b*16... bounded by maximum configured duration." captures the description for maximum duration.




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