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package eu.dnetlib.data.claims.sql;
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import com.sun.rowset.CachedRowSetImpl;
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import org.apache.log4j.Logger;
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import javax.sql.rowset.CachedRowSet;
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import java.sql.*;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* @author eri Sql Store class to connect to the DB backend
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*/
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public class SqlStore {
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private Logger log = Logger.getLogger(this.getClass());
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private String dbUrl;
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private String dbUser;
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private String dbPassword;
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private Connection connection;
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private String dbDriver;
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public SqlStore(String dbUrl, String dbUser, String dbPassword, String dbDriver) {
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this.dbDriver = dbDriver;
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this.dbUser = dbUser;
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this.dbUrl = dbUrl;
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this.dbPassword = dbPassword;
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}
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public SqlStore() throws Exception {
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}
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public void init() throws ClassNotFoundException, SQLException {
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Class.forName(dbDriver);
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// this.getConnection();
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}
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public void destroy() throws SQLException {
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this.closeConnection();
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}
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public void close() throws SQLException {
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closeConnection();
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}
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/**
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* Establishes a JDBC connection to the database server without a given DB.
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* Used in order to create or drop databases.
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*
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* @throws SQLException
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*/
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public void getConnectionNoDatabase() throws SQLException {
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String parsedUrl = this.parseUrl(dbUrl);
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log.info("Connecting to " + parsedUrl + dbUser );
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connection = (Connection) DriverManager.getConnection(parsedUrl, dbUser, dbPassword);
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log.info("Connected to " + parsedUrl);
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}
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/**
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* Establishes a connection to a given DB.
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*
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* @throws SQLException
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*/
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public void getConnection() throws SQLException {
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log.info("Attempting connection to : " + this.dbUrl + " for " + this.dbUser );
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connection = (Connection) DriverManager.getConnection(this.dbUrl, dbUser, dbPassword);
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log.info("Connected to " + this.dbUrl);
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}
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/**
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* Closes Database Statement.
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*
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* @throws SQLException
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*/
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public void closeStatement(Statement st) throws SQLException {
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log.debug("Closing Statement...");
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if (st != null) {
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st.close();
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}
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}
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/**
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* Closes Database Resultset.
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*
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* @throws SQLException
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*/
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public void closeResultset(ResultSet rs) throws SQLException {
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log.debug("Closing Resultset...");
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if (rs != null) {
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rs.close();
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}
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}
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/**
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* Closes Database connections.
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*
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* @throws SQLException
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*/
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public void closeConnection() throws SQLException {
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log.debug("Closing Connection...");
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if (connection != null) {
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connection.close();
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}
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}
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/**
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* Executes the @param command stored procedure in the Database. Stored
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* procedure parameters are specified in values.
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*
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* @param command
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* @param values
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* @return
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* @throws SQLException
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*/
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public ResultSet executeStoredProcedure(String command, ArrayList<String> values) throws SQLException {
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java.sql.CallableStatement callableStatement = null;
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log.debug(" Executing Query ..." + command);
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callableStatement = this.connection.prepareCall(command);
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int pos = 1;
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for (String v : values) {
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callableStatement.setObject(pos, v);
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pos++;
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}
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callableStatement.execute();
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return callableStatement.getResultSet();
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}
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/**
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* Executes the stored query procedure specified by @param command.
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*
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* @param command
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* @return
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* @throws SQLException
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*/
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public ResultSet executeStoredProcedure(String command) throws SQLException {
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log.debug(" Executing Query ..." + command);
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java.sql.CallableStatement callableStatement = null;
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callableStatement = this.connection.prepareCall(command);
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callableStatement.execute();
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return callableStatement.getResultSet();
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}
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/**
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* Executes the @param query
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*
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* @param command
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* @return
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* @throws SQLException
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*/
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public ResultSet executeQuery(String command) throws SQLException, SQLStoreException {
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log.debug(" Executing Query ... " + command);
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Statement st = null;
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ResultSet rs = null;
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try{
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this.getConnection();
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st = connection.createStatement();
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if (st.execute(command)) {
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rs = st.getResultSet();
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CachedRowSet rowset = new CachedRowSetImpl();
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rowset.populate(rs);
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return rowset;
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//st.close();
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//return rs;
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} else {
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log.error("Fail to execute command " + st.getWarnings());
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throw new SQLStoreException("Fail to execute command " + st.getWarnings());
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}
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} finally {
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this.closeResultset(rs);
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this.closeStatement(st);
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this.closeConnection();
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}
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}
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/**
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* Executes the @param prepared query with the @values as parameters
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* Returns a result set.
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*
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* @param command
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* @param values
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* @return
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* @throws SQLException
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*/
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public CachedRowSet executeQuery(String command, ArrayList<Object> values) throws SQLException, SQLStoreException {
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log.debug(" Executing Query ...\n" + command +"\n"+values);
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PreparedStatement st = null;
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ResultSet rs = null;
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try{
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this.getConnection();
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st = connection.prepareStatement(command);
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int pos = 1;
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for (Object v : values) {
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st.setObject(pos, v);
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pos++;
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}
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if (st.execute()) {
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rs = st.getResultSet();
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CachedRowSet rowset = new CachedRowSetImpl();
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rowset.populate(rs);
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return rowset;
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//return rs;
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} else {
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log.error("Fail to execute command " + st.getWarnings());
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throw new SQLStoreException("Fail to execute command " + st.getWarnings());
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}
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} finally {
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this.closeResultset(rs);
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this.closeStatement(st);
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this.closeConnection();
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}
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/*
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ResultSet rs = null;
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PreparedStatement st = null;
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this.getConnection();
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try {
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st = connection.prepareStatement(command);
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int pos = 1;
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for (Object v : values) {
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st.setObject(pos, v);
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pos++;
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}
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try {
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st.execute();
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try {
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rs = st.getResultSet();
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CachedRowSetImpl rowset = new CachedRowSetImpl();
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rowset.populate(rs);
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return rowset;
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} finally {
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try {
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rs.close();
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} catch (SQLException e) {
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log.error("Cannot close result set", e);
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}
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}
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} finally {
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try {
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st.close();
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} catch (SQLException e) {
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log.error("Fail to execute command " + st.getWarnings());
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log.error("Cannot close statement", e);
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}
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}
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} finally {
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try {
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log.debug("Closing Connection...");
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this.closeConnection();
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} catch (SQLException e) {
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log.error("Cannot close connection", e);
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}
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}
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*/
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}
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/**
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* Executes the @param command Update query
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*
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* @param command
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* @return
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* @throws SQLException
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*/
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public void executeUpdate(String command) throws SQLException {
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log.debug(" Executing Query ..." + command);
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Statement st = null;
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try{
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this.getConnection();
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st = connection.createStatement();
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st.executeUpdate(command);
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//st.close();
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} finally {
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this.closeStatement(st);
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this.closeConnection();
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}
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}
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public void executeUpdateWithRollback(List<String> commandS) throws SQLException{
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log.debug(" Executing Query ..." + commandS);
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Statement st = connection.createStatement();
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connection.setAutoCommit(false);
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for(String command : commandS) {
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if(command.equals("EXCEPTION")){
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throw new SQLException("Force rollback ");
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}
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st.executeUpdate(command);
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}
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//st.close();
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connection.commit();
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connection.setAutoCommit(true);
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}
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/**
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* Executes the @param command Prepared Update query with the
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*
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* @param command
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* @param values
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* @return
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* @throws Exception
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* @values as parameters
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*/
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public boolean executeUpdate(String command, ArrayList<Object> values) throws SQLException {
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log.debug(" Executing Query ..." + command);
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PreparedStatement st = null;
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try{
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this.getConnection();
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st = connection.prepareStatement(command);
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int pos = 1;
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for (Object v : values) {
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st.setObject(pos, v);
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pos++;
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}
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boolean executed = st.execute();
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if (executed) {
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log.error("Fail to execute update command " + st.getWarnings());
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throw new SQLException("Fail to execute update command " + st.getWarnings());
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}
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return !executed;
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} finally {
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this.closeStatement(st);
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this.closeConnection();
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}
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}
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/**
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* Turns autocommit on and off.
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*
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* @param on
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* @throws Exception
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*/
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public void setautoCommit(boolean on) throws SQLException {
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this.connection.setAutoCommit(on);
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}
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/**
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* Creates a serialized string from the ResultSet returned from a query
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*
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* @throws Exception
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*/
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public String getResults(ResultSet rs) throws SQLException {
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String data = new String();
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try {
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ResultSetMetaData rsmd = rs.getMetaData();
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while (rs.next()) {
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for (int i = 1; i < rsmd.getColumnCount() - 1; i++)
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{
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log.debug(rsmd.getColumnName(i) + "," + rs.getString(i));
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data += rsmd.getColumnName(i) + "," + rs.getString(i) + "\n";
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}
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}
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log.debug(" Generated Data :" + data);
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rs.close();
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return data;
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} finally {
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this.closeConnection();
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}
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}
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private String parseUrl(String url) {
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if (url.endsWith("/")) {
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url = url.substring(0, url.lastIndexOf('/'));
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}
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url = url.substring(0, url.lastIndexOf('/') + 1);
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log.debug(" db url parsed" + url);
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return url;
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}
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public String getDbDriver() {
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return dbDriver;
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}
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public void setDbDriver(String dbDriver) {
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this.dbDriver = dbDriver;
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}
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public String getDbUrl() {
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return dbUrl;
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}
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public void setDbUrl(String dbUrl) {
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this.dbUrl = dbUrl;
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}
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public String getDbUser() {
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return dbUser;
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}
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public void setDbUser(String dbUser) {
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this.dbUser = dbUser;
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}
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public String getDbPassword() {
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return dbPassword;
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}
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public void setDbPassword(String dbPassword) {
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this.dbPassword = dbPassword;
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}
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public void setConnection(Connection connection) {
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this.connection = connection;
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}
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}
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