/**
* Updates this import's status in the database.
*
* @param importStatus The status to update to.
*/
private void updateImportStatus(ImportStatus importStatus) {
try {
getDao().updateImportStatus(dbDTO.getId(), importStatus);
} catch (DAOException e) {
LOGGER.error("Failed to update import status of database " + dbDTO.getName(), e);
}
}
/**
* The thread's execution body called by {@link #run()}.
*
* @param importLogger Logger that should be used by this database creation (i.e. import) thread.
* @throws DAOException Thrown if database access error happens.
* @throws ImportException If any other import error happens.
*/
private void execute(Logger importLogger) throws DAOException, ImportException {
updateImportStatus(ImportStatus.STARTED);
// Create the database.
DAOFactory.get().getDao(StagingDatabaseDAO.class).createDatabase(dbDTO.getName());
// Populate the database from the given file.
// TODO Use a factory mechanism to obtain a particular ImporterIF implementation.
ImporterIF importer = new MSAccessImporter(importLogger);
importer.doImport(dbFile, dbDTO.getName());
}
/**
* Creates import logger for the given database-
*
* @param dbDTO The given database, as DTO.
* @return The created import logger.
*/
private ImportLogger createLogger(StagingDatabaseDTO dbDTO) {
String loggerName = dbDTO.getName() + "_" + ImportLogger.class.getSimpleName();
ImportLogger logger = (ImportLogger) Logger.getLogger(loggerName, ImportLoggerFactory.INSTANCE);
logger.setDbDTO(dbDTO);
logger.setLevel(Level.TRACE);
return logger;
}
/*
* (non-Javadoc)
*
* @see java.lang.Thread#run()
*/
@Override
public void run() {
LogUtil.debug(
"Import for database " + dbDTO.getName() + " started from file " + dbFile.getName(),
importLogger,
LOGGER);
try {
execute(importLogger);
updateImportStatus(ImportStatus.COMPLETED);
LogUtil.debug(
"Import for database " + dbDTO.getName() + " finished from file " + dbFile.getName(),
importLogger,
LOGGER);
} catch (Exception e) {
updateImportStatus(ImportStatus.ERROR);
LogUtil.error("Staging database creation failed with error", e, importLogger, LOGGER);
}
}
/**
* Convenience method that creates an instance of {@link ImportRunner} for the given database from
* given file, and then starts it.
*
* @param dbDTO Will be passed into the private constructor.
* @param dbFile Will be passed into the private constructor
* @return The created and started thread.
*/
public static synchronized ImportRunner start(StagingDatabaseDTO dbDTO, File dbFile) {
if (dbDTO == null || dbFile == null || !dbFile.exists() || !dbFile.isFile()) {
throw new IllegalArgumentException("The database DTO and file must be given!");
}
String dbName = dbDTO.getName();
ImportRunner currentRun = CURRENT_RUNS.get(dbName);
if (currentRun != null) {
if (currentRun.isAlive()) {
throw new IllegalStateException(
"A creator is already running for this staging database: " + dbName);
} else {
CURRENT_RUNS.remove(dbName);
}
}
ImportRunner creator = new ImportRunner(dbDTO, dbFile);
creator.start();
CURRENT_RUNS.put(dbName, creator);
return creator;
}
