--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/java/sql-dk/src/main/java/info/globalcode/sql/dk/DatabaseConnection.java Mon Mar 04 20:15:24 2019 +0100
@@ -0,0 +1,192 @@
+/**
+ * SQL-DK
+ * Copyright © 2013 František Kučera (frantovo.cz)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package info.globalcode.sql.dk;
+
+import static info.globalcode.sql.dk.jmx.ConnectionManagement.incrementCounter;
+import static info.globalcode.sql.dk.jmx.ConnectionManagement.resetCounter;
+import info.globalcode.sql.dk.batch.Batch;
+import info.globalcode.sql.dk.batch.BatchException;
+import info.globalcode.sql.dk.configuration.DatabaseDefinition;
+import info.globalcode.sql.dk.configuration.Loader;
+import info.globalcode.sql.dk.configuration.Properties;
+import info.globalcode.sql.dk.formatting.ColumnsHeader;
+import info.globalcode.sql.dk.formatting.Formatter;
+import info.globalcode.sql.dk.jmx.ConnectionManagement;
+import info.globalcode.sql.dk.jmx.ConnectionManagement.COUNTER;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.SQLWarning;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * Represents connected database. Is derived from {@linkplain DatabaseDefinition}.
+ * Wraps {@linkplain Connection}.
+ *
+ * Is responsible for executing {@linkplain SQLCommand} and passing results to the
+ * {@linkplain Formatter}.
+ *
+ * @author Ing. František Kučera (frantovo.cz)
+ */
+public class DatabaseConnection implements AutoCloseable {
+
+ private static final Logger log = Logger.getLogger(DatabaseConnection.class.getName());
+ public static final String JDBC_PROPERTY_USER = "user";
+ public static final String JDBC_PROPERTY_PASSWORD = "password";
+ private final DatabaseDefinition databaseDefinition;
+ private final Connection connection;
+ private final Properties properties;
+ /**
+ * Could be null = JMX is disabled → must check, see functions in
+ * {@linkplain ConnectionManagement}
+ */
+ private final ConnectionManagement connectionMBean;
+
+ /**
+ *
+ * @param databaseDefinition DB url, name, password etc.
+ * @param properties additional properties from CLI
+ * @param connectionMBean JMX management bean | null = disabled JMX reporting
+ * @throws SQLException
+ */
+ public DatabaseConnection(DatabaseDefinition databaseDefinition, Properties properties, ConnectionManagement connectionMBean) throws SQLException {
+ this.databaseDefinition = databaseDefinition;
+ this.properties = properties;
+ this.connectionMBean = connectionMBean;
+ this.connection = Loader.jdbcConnect(databaseDefinition, properties);
+ }
+
+ public void executeQuery(SQLCommand sqlCommand, Formatter formatter) throws SQLException {
+ formatter.writeStartBatch();
+ formatter.writeStartDatabase(databaseDefinition);
+ formatter.writeStartStatement();
+ formatter.writeQuery(sqlCommand.getQuery());
+ formatter.writeParameters(sqlCommand.getParameters());
+ processCommand(sqlCommand, formatter);
+ formatter.writeEndStatement();
+ formatter.writeEndDatabase();
+ formatter.writeEndBatch();
+ }
+
+ public void executeBatch(Batch batch, Formatter formatter) throws SQLException, BatchException {
+ formatter.writeStartBatch();
+ formatter.writeStartDatabase(databaseDefinition);
+ while (batch.hasNext()) {
+ SQLCommand sqlCommand = batch.next();
+ formatter.writeStartStatement();
+ formatter.writeQuery(sqlCommand.getQuery());
+ formatter.writeParameters(sqlCommand.getParameters());
+ processCommand(sqlCommand, formatter);
+ formatter.writeEndStatement();
+ }
+ formatter.writeEndDatabase();
+ formatter.writeEndBatch();
+ }
+
+ private void processCommand(SQLCommand sqlCommand, Formatter formatter) throws SQLException {
+ incrementCounter(connectionMBean, COUNTER.COMMAND);
+ resetCounter(connectionMBean, COUNTER.RECORD_CURRENT);
+
+ try (PreparedStatement ps = sqlCommand.prepareStatement(connection)) {
+ log.log(Level.FINE, "Statement prepared");
+ sqlCommand.parametrize(ps);
+
+ boolean isRS = ps.execute();
+ log.log(Level.FINE, "Statement executed");
+ if (isRS) {
+ try (ResultSet rs = ps.getResultSet()) {
+ processResultSet(rs, formatter);
+ }
+ } else {
+ processUpdateResult(ps, formatter);
+ }
+ logWarnings(ps);
+
+ while (ps.getMoreResults() || ps.getUpdateCount() > -1) {
+ ResultSet rs = ps.getResultSet();
+ if (rs == null) {
+ processUpdateResult(ps, formatter);
+ } else {
+ processResultSet(rs, formatter);
+ rs.close();
+ }
+ logWarnings(ps);
+ }
+ }
+ }
+
+ private void processUpdateResult(PreparedStatement ps, Formatter formatter) throws SQLException {
+ formatter.writeUpdatesResult(ps.getUpdateCount());
+ }
+
+ private void processResultSet(ResultSet rs, Formatter formatter) throws SQLException {
+ formatter.writeStartResultSet(new ColumnsHeader(rs.getMetaData()));
+
+ int columnCount = rs.getMetaData().getColumnCount();
+
+ while (rs.next()) {
+ incrementCounter(connectionMBean, COUNTER.RECORD_CURRENT);
+ incrementCounter(connectionMBean, COUNTER.RECORD_TOTAL);
+
+ formatter.writeStartRow();
+
+ for (int i = 1; i <= columnCount; i++) {
+ formatter.writeColumnValue(rs.getObject(i));
+ }
+
+ formatter.writeEndRow();
+ }
+
+ formatter.writeEndResultSet();
+ }
+
+ private void logWarnings(PreparedStatement ps) throws SQLException {
+ SQLWarning w = ps.getWarnings();
+ while (w != null) {
+ log.log(Level.WARNING, "SQL: {0}", w.getLocalizedMessage());
+ w = w.getNextWarning();
+ }
+ ps.clearWarnings();
+ }
+
+ /**
+ * Tests if this connection is live.
+ *
+ * @return true if test was successful
+ * @throws SQLException if test fails
+ */
+ public boolean test() throws SQLException {
+ connection.getAutoCommit();
+ return true;
+ }
+
+ public String getProductName() throws SQLException {
+ return connection.getMetaData().getDatabaseProductName();
+ }
+
+ public String getProductVersion() throws SQLException {
+ return connection.getMetaData().getDatabaseProductVersion();
+ }
+
+ @Override
+ public void close() throws SQLException {
+ connection.close();
+ }
+}