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add regx pattern file filter for distributed load
format codestyle
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122 changes: 122 additions & 0 deletions
122
dora/core/server/master/src/main/java/alluxio/master/predicate/FileNamePatternPredicate.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| /* | ||
| * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0 | ||
| * (the "License"). You may not use this work except in compliance with the License, which is | ||
| * available at www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, | ||
| * either express or implied, as more fully set forth in the License. | ||
| * | ||
| * See the NOTICE file distributed with this work for information regarding copyright ownership. | ||
| */ | ||
|
|
||
| package alluxio.master.predicate; | ||
|
|
||
| import alluxio.proto.journal.Job.FileFilter; | ||
| import alluxio.underfs.UfsStatus; | ||
| import alluxio.wire.FileInfo; | ||
|
|
||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
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| import java.util.function.Predicate; | ||
| import java.util.regex.Pattern; | ||
|
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| /** | ||
| * A predicate related to date of the file. | ||
| */ | ||
| public class FileNamePatternPredicate implements FilePredicate { | ||
| private static final Logger LOG = LoggerFactory.getLogger(FileNamePatternPredicate.class); | ||
| private final String mFilterName; | ||
| private String mRegexPatternStr; | ||
|
|
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| /** | ||
| * Factory for modification time predicate. | ||
| */ | ||
| public static class FileNamePatternFactory extends Factory { | ||
| @Override | ||
| public String getFilterName() { | ||
| return "fileNamePattern"; | ||
| } | ||
| } | ||
|
|
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| /** | ||
| * Factory for creating instances. | ||
| */ | ||
| public abstract static class Factory implements FilePredicateFactory { | ||
| /** | ||
| * @return filter name for the predicate | ||
| */ | ||
| public abstract String getFilterName(); | ||
|
|
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| /** | ||
| * Creates a {@link FilePredicate} from the string value. | ||
| * | ||
| * @param regexPatternStr the regex pattern string from the filter | ||
| * @return the created predicate | ||
| */ | ||
| public FilePredicate createFileNamePatternPredicate(String regexPatternStr) { | ||
| return new FileNamePatternPredicate(getFilterName(), regexPatternStr); | ||
| } | ||
|
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| @Override | ||
| public FilePredicate create(FileFilter filter) { | ||
| try { | ||
| if (filter.hasName() && filter.getName().equals(getFilterName())) { | ||
| if (filter.hasValue()) { | ||
| return createFileNamePatternPredicate(filter.getValue()); | ||
| } | ||
| } | ||
| } catch (Exception e) { | ||
| // fall through | ||
| } | ||
| return null; | ||
| } | ||
| } | ||
|
|
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| /** | ||
| * Creates an instance. | ||
| * | ||
| * @param filterName the filter name | ||
| * @param regexPatternStr the regex pattern string for file filtering | ||
| */ | ||
| public FileNamePatternPredicate(String filterName, String regexPatternStr) { | ||
| mFilterName = filterName; | ||
| mRegexPatternStr = regexPatternStr; | ||
| } | ||
|
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| @Override | ||
| public Predicate<FileInfo> get() { | ||
| return FileInfo -> { | ||
| try { | ||
| String fileName = FileInfo.getName(); | ||
| return Pattern.matches(mRegexPatternStr, fileName); | ||
| } catch (RuntimeException e) { | ||
| LOG.debug("Failed to filter: ", e); | ||
| return false; | ||
| } | ||
| }; | ||
| } | ||
|
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| @Override | ||
| public Predicate<UfsStatus> getUfsStatusPredicate() { | ||
| return UfsStatus -> { | ||
| try { | ||
| String fileName = getFileName(UfsStatus); | ||
| return Pattern.matches(mRegexPatternStr, fileName); | ||
| } catch (RuntimeException e) { | ||
| LOG.debug("Failed to filter: ", e); | ||
| return false; | ||
| } | ||
| }; | ||
| } | ||
|
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| private String getFileName(UfsStatus ufsStatus) { | ||
| String name = ufsStatus.getName(); | ||
| int index = name.lastIndexOf("/"); | ||
| if (index == -1) { | ||
| return name; | ||
| } | ||
| name = name.substring(index + 1); | ||
| return name; | ||
| } | ||
| } |
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