arjun4084346 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_r385511737
########## File path: gobblin-data-management/src/main/java/org/apache/gobblin/data/management/copy/DateRangeBasedFileFilter.java ########## @@ -0,0 +1,109 @@ +/* + * 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 com.google.common.base.Strings; +import com.google.common.collect.ImmutableList; +import java.util.Collection; +import java.util.Iterator; +import lombok.extern.slf4j.Slf4j; +import org.apache.gobblin.configuration.ConfigurationKeys; +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; + + +/** + * A {@link CopyableFileFilter} that drops a {@link CopyableFile} if file modification time not within the lookback + * window + * <code>sourceFs<code> + */ +@Slf4j +public class DateRangeBasedFileFilter implements CopyableFileFilter { + + private Period minLookBackPeriod; + private Period maxLookBackPeriod; + private String timezone; + private DateTime currentTime; + private DateTime minLookBackTime; + private DateTime maxLookBackTime; + + public static final String CONFIGURATION_KEY_PREFIX = "gobblin.dataset.filter."; + public static final String DEFAULT_DATE_PATTERN_TIMEZONE = ConfigurationKeys.PST_TIMEZONE_NAME; + + public DateRangeBasedFileFilter(Period minLookback, Period maxLookback, String timezone) { + this.minLookBackPeriod = minLookback; + this.maxLookBackPeriod = maxLookback; + this.timezone = timezone; + this.currentTime = !Strings.isNullOrEmpty(this.timezone) ? DateTime.now(DateTimeZone.forID(this.timezone)) + : DateTime.now(DateTimeZone.forID(DEFAULT_DATE_PATTERN_TIMEZONE)); + this.minLookBackTime = this.currentTime.minus(this.minLookBackPeriod); + this.maxLookBackTime = this.currentTime.minus(this.maxLookBackPeriod); + } + + /** + * For every {@link CopyableFile} in <code>copyableFiles</code> checks if a + * {@link CopyableFile#getOrigin()#getPath()#getModificationTime()} + * + date between the min and max look back window on <code>sourceFs</code> {@inheritDoc} + * + * @see CopyableFileFilter#filter(FileSystem, + * FileSystem, Collection) + */ + @Override + public Collection<CopyableFile> filter(FileSystem sourceFs, FileSystem targetFs, + Collection<CopyableFile> copyableFiles) { + Iterator<CopyableFile> iterator = copyableFiles.iterator(); + + ImmutableList.Builder<CopyableFile> filtered = ImmutableList.builder(); + + while (iterator.hasNext()) { + CopyableFile file = iterator.next(); + if (isFileModifiedWithinLookBackPeriod(file.getOrigin().getModificationTime())) { + filtered.add(file); + } + } + + return filtered.build(); + } + + /** + * + * @param modTime file modification time in long. + * @return <code>true</code> if the file modification time within lookback window; + * <code>false</code> if file modification time not within lookback window. + * + */ + private boolean isFileModifiedWithinLookBackPeriod(long modTime) { + DateTime modifiedTime = + !Strings.isNullOrEmpty(this.timezone) ? new DateTime(modTime, DateTimeZone.forID(this.timezone)) + : new DateTime(modTime, DateTimeZone.forID(DEFAULT_DATE_PATTERN_TIMEZONE)); Review comment: I found this more readable Strings.isNullOrEmpty(this.timezone) ? new DateTime(modTime, DateTimeZone.forID(DEFAULT_DATE_PATTERN_TIMEZONE)) : new DateTime(modTime, DateTimeZone.forID(this.timezone)) : ; just saying :D ---------------------------------------------------------------- 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] With regards, Apache Git Services
