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Introduce interface GBPTreeFileUtil that gathers file operations used inside of components built on top of GBPTree, label index and schema index. Implementation decide how those file operations should be carried out. Specifically if it should be done using normal file system or file system provided by page cache.
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.../kernel/src/main/java/org/neo4j/kernel/impl/index/labelscan/GBPTreePageCacheFileUtil.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| /* | ||
| * Copyright (c) 2002-2017 "Neo Technology," | ||
| * Network Engine for Objects in Lund AB [http://neotechnology.com] | ||
| * | ||
| * This file is part of Neo4j. | ||
| * | ||
| * Neo4j is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.neo4j.kernel.impl.index.labelscan; | ||
|
|
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| import java.io.File; | ||
| import java.io.IOException; | ||
| import java.nio.file.NoSuchFileException; | ||
|
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| import org.neo4j.io.fs.FileHandle; | ||
| import org.neo4j.io.pagecache.PageCache; | ||
| import org.neo4j.kernel.impl.index.GBPTreeFileUtil; | ||
|
|
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| import static org.neo4j.function.Predicates.alwaysTrue; | ||
|
|
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| /** | ||
| * Use {@link PageCache} to handle file operations on GBPTree file. | ||
| */ | ||
| public class GBPTreePageCacheFileUtil implements GBPTreeFileUtil | ||
| { | ||
| private final PageCache pageCache; | ||
|
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| public GBPTreePageCacheFileUtil( PageCache pageCache ) | ||
| { | ||
| this.pageCache = pageCache; | ||
| } | ||
|
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| public void deleteFile( File storeFile ) throws IOException | ||
| { | ||
| FileHandle fileHandle = storeFileHandle( pageCache, storeFile ); | ||
| fileHandle.delete(); | ||
| } | ||
|
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| public void deleteFileIfPresent( File storeFile ) throws IOException | ||
| { | ||
| try | ||
| { | ||
| deleteFile( storeFile ); | ||
| } | ||
| catch ( NoSuchFileException e ) | ||
| { | ||
| // File does not exist, we don't need to delete | ||
| } | ||
| } | ||
|
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| public boolean storeFileExists( File storeFile ) | ||
| { | ||
| try | ||
| { | ||
| return pageCache.getCachedFileSystem().streamFilesRecursive( storeFile ).anyMatch( alwaysTrue() ); | ||
| } | ||
| catch ( IOException e ) | ||
| { | ||
| return false; | ||
| } | ||
| } | ||
|
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| @Override | ||
| public void mkdirs( File dir ) throws IOException | ||
| { | ||
| pageCache.getCachedFileSystem().mkdirs( dir ); | ||
| } | ||
|
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| private static FileHandle storeFileHandle( PageCache pageCache, File storeFile ) throws IOException | ||
| { | ||
| return pageCache.getCachedFileSystem() | ||
| .streamFilesRecursive( storeFile ) | ||
| .findFirst() | ||
| .orElseThrow( () -> new NoSuchFileException( storeFile.getPath() ) ); | ||
| } | ||
| } |
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68 changes: 68 additions & 0 deletions
68
...ty/kernel/src/main/java/org/neo4j/kernel/impl/index/schema/GBPTreeFileSystemFileUtil.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| /* | ||
| * Copyright (c) 2002-2017 "Neo Technology," | ||
| * Network Engine for Objects in Lund AB [http://neotechnology.com] | ||
| * | ||
| * This file is part of Neo4j. | ||
| * | ||
| * Neo4j is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.neo4j.kernel.impl.index.schema; | ||
|
|
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| import java.io.File; | ||
| import java.io.IOException; | ||
| import java.nio.file.NoSuchFileException; | ||
|
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| import org.neo4j.io.fs.FileSystemAbstraction; | ||
| import org.neo4j.kernel.impl.index.GBPTreeFileUtil; | ||
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| public class GBPTreeFileSystemFileUtil implements GBPTreeFileUtil | ||
| { | ||
| private final FileSystemAbstraction fs; | ||
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| public GBPTreeFileSystemFileUtil( FileSystemAbstraction fs ) | ||
| { | ||
| this.fs = fs; | ||
| } | ||
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| @Override | ||
| public void deleteFile( File storeFile ) throws IOException | ||
| { | ||
| fs.deleteFileOrThrow( storeFile ); | ||
| } | ||
|
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| @Override | ||
| public void deleteFileIfPresent( File storeFile ) throws IOException | ||
| { | ||
| try | ||
| { | ||
| deleteFile( storeFile ); | ||
| } | ||
| catch ( NoSuchFileException e ) | ||
| { | ||
| // File does not exist, we don't need to delete | ||
| } | ||
| } | ||
|
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| @Override | ||
| public boolean storeFileExists( File storeFile ) | ||
| { | ||
| return fs.fileExists( storeFile ); | ||
| } | ||
|
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| @Override | ||
| public void mkdirs( File dir ) throws IOException | ||
| { | ||
| fs.mkdirs( dir ); | ||
| } | ||
| } |
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