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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.log4j.Logger;
public class MysqlConnection implements AutoCloseable {
private static final Logger LOGGER = Logger.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"))
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()");
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();
}
Database.returnConnection(this);
}
void release() {
try {
rawConnection.close();
} catch (SQLException e) {
// Nothing meaningful to do
}
}
}
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