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package net.sourceforge.subsonic.backend.dao;
import net.sourceforge.subsonic.backend.dao.schema.Schema;
import net.sourceforge.subsonic.backend.dao.schema.Schema10;
import net.sourceforge.subsonic.backend.dao.schema.Schema20;
import net.sourceforge.subsonic.backend.Util;
import org.apache.log4j.Logger;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import javax.sql.DataSource;
import java.io.File;
/**
* DAO helper class which creates the data source, and updates the database schema.
*
* @author Sindre Mehus
*/
public class DaoHelper {
private static final Logger LOG = Logger.getLogger(DaoHelper.class);
private Schema[] schemas = {new Schema10(), new Schema20()};
private DataSource dataSource;
private static boolean shutdownHookAdded;
public DaoHelper() {
dataSource = createDataSource();
checkDatabase();
addShutdownHook();
}
private void addShutdownHook() {
if (shutdownHookAdded) {
return;
}
shutdownHookAdded = true;
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
System.err.println("Shutting down database.");
try {
getJdbcTemplate().execute("shutdown");
System.err.println("Done.");
} catch (Throwable x) {
System.err.println("Failed to shut down database.");
x.printStackTrace();
}
}
});
}
/**
* Returns a JDBC template for performing database operations.
*
* @return A JDBC template.
*/
public JdbcTemplate getJdbcTemplate() {
return new JdbcTemplate(dataSource);
}
private DataSource createDataSource() {
File home = Util.getBackendHome();
DriverManagerDataSource ds = new DriverManagerDataSource();
ds.setDriverClassName("org.hsqldb.jdbcDriver");
ds.setUrl("jdbc:hsqldb:file:" + home.getPath() + "/db/subsonic-backend");
ds.setUsername("sa");
ds.setPassword("");
return ds;
}
private void checkDatabase() {
LOG.info("Checking database schema.");
try {
for (Schema schema : schemas) {
schema.execute(getJdbcTemplate());
}
LOG.info("Done checking database schema.");
} catch (Exception x) {
LOG.error("Failed to initialize database.", x);
}
}
}
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