@Override
public boolean run() {
try {
String dbLocation =
new File(config.getString(Configurator.DATABASE_LOCATION_PROPERTY_KEY)).getAbsolutePath();
if (new CurrentDatabase(new StoreVersionCheck(new DefaultFileSystemAbstraction()))
.storeFilesAtCurrentVersion(new File(dbLocation))) {
return true;
}
File storeDir = new File(dbLocation);
FileSystemAbstraction fileSystem = new DefaultFileSystemAbstraction();
UpgradableDatabase upgradableDatabase =
new UpgradableDatabase(new StoreVersionCheck(fileSystem));
if (!upgradableDatabase.storeFilesUpgradeable(storeDir)) {
return true;
}
try {
new StoreMigrationTool()
.run(
dbLocation,
configForStoreDir(new Config(dbConfig), storeDir),
StringLogger.SYSTEM,
monitor);
} catch (UpgradeNotAllowedByConfigurationException e) {
log.log(e.getMessage());
System.out.println(e.getMessage());
failureMessage = e.getMessage();
return false;
} catch (StoreUpgrader.UnableToUpgradeException e) {
log.error("Unable to upgrade store", e);
return false;
}
return true;
} catch (Exception e) {
log.error("Unknown error", e);
return false;
}
}
@Override
public boolean needsMigration(File storeDir) throws IOException {
if (upgradableDatabase.hasCurrentVersion(fileSystem, storeDir)) {
return false;
}
switch (versionToUpgradeFrom(storeDir)) {
case Legacy19Store.LEGACY_VERSION:
return false;
case Legacy20Store.LEGACY_VERSION:
case Legacy21Store.LEGACY_VERSION:
return true;
default:
throw new IllegalStateException(
"Unknown version to upgrade from: " + versionToUpgradeFrom(storeDir));
}
}
/**
* Will detect which version we're upgrading from. Doing that initialization here is good because
* we do this check when {@link #moveMigratedFiles(java.io.File, java.io.File) moving migrated
* files}, which might be done as part of a resumed migration, i.e. run even if {@link
* org.neo4j.kernel.impl.storemigration.StoreMigrationParticipant#migrate(java.io.File,
* java.io.File, SchemaIndexProvider, org.neo4j.io.pagecache.PageCache)} hasn't been run.
*/
private String versionToUpgradeFrom(File storeDir) {
if (versionToUpgradeFrom == null) {
versionToUpgradeFrom = upgradableDatabase.checkUpgradeable(storeDir);
}
return versionToUpgradeFrom;
}