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[mapdb] Recreate DB when incompatible OH2 DB is used (#9299)

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The only way to recover from an incompatible OH2 database is to create a new database.
With these changes the add-on will create a new database automatically and archive the incompatible database files in a backup directory.

Fixes #8794

Signed-off-by: Wouter Born <github@maindrain.net>
This commit is contained in:
Wouter Born 2020-12-12 19:11:50 +01:00 committed by GitHub
parent 3a4d9ec89f
commit 9ee81eae38
1 changed files with 55 additions and 12 deletions
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59
bundles/org.openhab.persistence.mapdb/src/main/java/org/openhab/persistence/mapdb/internal/MapDbPersistenceService.java
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@ -13,6 +13,11 @@
package org.openhab.persistence.mapdb.internal;
import java.io.File;
import java.io.IOException;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.time.Instant;
import java.util.Date;
import java.util.List;
import java.util.Locale;
@ -60,8 +65,8 @@ public class MapDbPersistenceService implements QueryablePersistenceService {
private static final String SERVICE_ID = "mapdb";
private static final String SERVICE_LABEL = "MapDB";
private static final String DB_FOLDER_NAME = OpenHAB.getUserDataFolder() + File.separator + "persistence"
+ File.separator + "mapdb";
private static final Path DB_DIR = new File(OpenHAB.getUserDataFolder(), "persistence").toPath().resolve("mapdb");
private static final Path BACKUP_DIR = DB_DIR.resolve("backup");
private static final String DB_FILE_NAME = "storage.mapdb";
private final Logger logger = LoggerFactory.getLogger(MapDbPersistenceService.class);
@ -80,18 +85,56 @@ public class MapDbPersistenceService implements QueryablePersistenceService {
public void activate() {
logger.debug("MapDB persistence service is being activated");
File folder = new File(DB_FOLDER_NAME);
if (!folder.exists()) {
if (!folder.mkdirs()) {
logger.warn("Failed to create one or more directories in the path '{}'", DB_FOLDER_NAME);
try {
Files.createDirectories(DB_DIR);
} catch (IOException e) {
logger.warn("Failed to create one or more directories in the path '{}'", DB_DIR);
logger.warn("MapDB persistence service activation has failed.");
return;
}
}
File dbFile = new File(DB_FOLDER_NAME, DB_FILE_NAME);
File dbFile = DB_DIR.resolve(DB_FILE_NAME).toFile();
try {
db = DBMaker.newFileDB(dbFile).closeOnJvmShutdown().make();
map = db.createTreeMap("itemStore").makeOrGet();
} catch (RuntimeException re) {
Throwable cause = re.getCause();
if (cause instanceof ClassNotFoundException) {
ClassNotFoundException cnf = (ClassNotFoundException) cause;
logger.warn(
"The MapDB in {} is incompatible with openHAB {}: {}. A new and empty MapDB will be used instead.",
dbFile, OpenHAB.getVersion(), cnf.getMessage());
try {
Files.createDirectories(BACKUP_DIR);
} catch (IOException ioe) {
logger.warn("Failed to create one or more directories in the path '{}'", BACKUP_DIR);
logger.warn("MapDB persistence service activation has failed.");
return;
}
try (DirectoryStream<Path> stream = Files.newDirectoryStream(DB_DIR)) {
long epochMilli = Instant.now().toEpochMilli();
for (Path path : stream) {
if (!Files.isDirectory(path)) {
Path newPath = BACKUP_DIR.resolve(epochMilli + "--" + path.getFileName());
Files.move(path, newPath);
logger.info("Moved incompatible MapDB file '{}' to '{}'", path, newPath);
}
}
} catch (IOException ioe) {
logger.warn("Failed to read files from '{}': {}", DB_DIR, ioe.getMessage());
logger.warn("MapDB persistence service activation has failed.");
return;
}
db = DBMaker.newFileDB(dbFile).closeOnJvmShutdown().make();
map = db.createTreeMap("itemStore").makeOrGet();
} else {
logger.warn("Failed to create or open the MapDB: {}", re.getMessage());
logger.warn("MapDB persistence service activation has failed.");
}
}
logger.debug("MapDB persistence service is now activated");
}