sv2000 commented on a change in pull request #2633: GOBBLIN-759: Added feature 
to support DistCP to copy files that were …
URL: https://github.com/apache/incubator-gobblin/pull/2633#discussion_r324483538
 
 

 ##########
 File path: 
gobblin-data-management/src/main/java/org/apache/gobblin/data/management/copy/ModifiedDateRangeBasedFileFilter.java
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 @@ -0,0 +1,116 @@
+/*
+ * 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.gobblin.data.management.copy;
+
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.Properties;
+
+import lombok.extern.slf4j.Slf4j;
+
+import org.apache.hadoop.fs.FileSystem;
+import org.joda.time.DateTime;
+import org.joda.time.DateTimeZone;
+import org.joda.time.Period;
+import org.joda.time.format.PeriodFormatter;
+import org.joda.time.format.PeriodFormatterBuilder;
+
+import com.google.common.collect.ImmutableList;
+
+import org.apache.gobblin.configuration.ConfigurationKeys;
+
+
+/**
+ * A {@link CopyableFileFilter} that drops a {@link CopyableFile} if file 
modified time not between the loop back window
+ *  <code>sourceFs<code>
+ */
+@Slf4j
+public class ModifiedDateRangeBasedFileFilter implements CopyableFileFilter {
 
 Review comment:
   Looks like most of the logic inside this class can be moved to a parent 
class that implements a "DateRangeFileFilter". ModTimeDateRangeFileFilter can 
extend this class and pass modification time to filter files. 

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