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package org.openslx.imagemaster.db;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
public class MysqlConnection implements AutoCloseable
{
private static final Logger LOGGER = LogManager.getLogger( MysqlConnection.class );
private static final int CONNECTION_TIMEOUT_MS = 5 * 60 * 1000;
private final long deadline = System.currentTimeMillis() + CONNECTION_TIMEOUT_MS;
private final Connection rawConnection;
private boolean hasPendingQueries = false;
private List<MysqlStatement> openStatements = new ArrayList<>();
MysqlConnection( Connection rawConnection )
{
this.rawConnection = rawConnection;
}
public MysqlStatement prepareStatement( String sql ) throws SQLException
{
if ( !sql.startsWith( "SELECT" ) && !sql.startsWith( "DESCRIBE" ) && !sql.startsWith( "SHOW" ) ) {
hasPendingQueries = true;
}
MysqlStatement statement = new MysqlStatement( rawConnection, sql );
openStatements.add( statement );
return statement;
}
public void commit() throws SQLException
{
rawConnection.commit();
hasPendingQueries = false;
}
public void rollback() throws SQLException
{
rawConnection.rollback();
hasPendingQueries = false;
}
boolean isValid()
{
return System.currentTimeMillis() < deadline;
}
@Override
public void close()
{
if ( hasPendingQueries ) {
LOGGER.warn( "Mysql connection had uncommited queries on .close()",
new RuntimeException( "Stack trace" ) );
for ( MysqlStatement s : openStatements ) {
LOGGER.info( s.getQuery() );
}
hasPendingQueries = false;
}
try {
rawConnection.rollback();
} catch ( SQLException e ) {
LOGGER.warn( "Rolling back uncommited queries failed!", e );
}
if ( !openStatements.isEmpty() ) {
for ( MysqlStatement statement : openStatements ) {
statement.close();
}
openStatements.clear();
}
try {
rawConnection.rollback();
rawConnection.setAutoCommit( true );
} catch ( SQLException e ) {
LOGGER.warn( "Rolling back uncommited queries failed!", e );
}
Database.returnConnection( this );
}
void release()
{
try {
rawConnection.close();
} catch ( SQLException e ) {
// Nothing meaningful to do
}
}
void setAutoCommit( boolean b ) throws SQLException
{
rawConnection.setAutoCommit( b );
}
}
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