io.datarouter.filesystem.snapshot.group.groupops.SnapshotGroupFileReadOps Maven / Gradle / Ivy
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/*
* Copyright © 2009 HotPads ([email protected])
*
* Licensed 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 io.datarouter.filesystem.snapshot.group.groupops;
import io.datarouter.filesystem.snapshot.key.SnapshotKey;
import io.datarouter.scanner.Scanner;
import io.datarouter.storage.file.Directory;
import io.datarouter.storage.file.PathbeanKey;
import io.datarouter.storage.util.Subpath;
public class SnapshotGroupFileReadOps{
private final String groupId;
private final Directory idDirectory;
private final Directory fileDirectory;
public SnapshotGroupFileReadOps(
String groupId,
Directory idDirectory,
Directory fileDirectory){
this.groupId = groupId;
this.idDirectory = idDirectory;
this.fileDirectory = fileDirectory;
}
public Scanner scanSnapshotFilesFromStorage(){
try{
return fileDirectory.scanKeys(Subpath.empty());
}catch(Exception e){
//filesystem directories likely missing
//TODO create those directories on startup
return Scanner.empty();
}
}
public Scanner scanSnapshotKeysFromStorage(){
try{
return idDirectory.scanKeys(Subpath.empty())
.map(PathbeanKey::getFile)
.map(snapshotId -> new SnapshotKey(groupId, snapshotId));
}catch(Exception e){
//filesystem directories likely missing
//TODO create those directories on startup
return Scanner.empty();
}
}
}