archive/net.sourceforge.phpeclipse.quantum.sql/src/com/quantum/sql/MultiSQLServer.java

   1 package com.quantum.sql;
   2
   3 import java.io.ByteArrayOutputStream;
   4 import java.io.InputStream;
   5 import java.io.Reader;
   6 import java.io.UnsupportedEncodingException;
   7 import java.sql.Connection;
   8 import java.sql.DatabaseMetaData;
   9 import java.sql.Driver;
  10 import java.sql.ResultSet;
  11 import java.sql.ResultSetMetaData;
  12 import java.sql.SQLException;
  13 import java.sql.Statement;
  14 import java.util.Properties;
  15 import java.util.Vector;
  16
  17 import com.quantum.model.Bookmark;
  18 import com.quantum.model.ConnectionException;
  19 import com.quantum.model.Entity;
  20 import com.quantum.model.JDBCDriver;
  21 import com.quantum.model.PasswordFinder;
  22 import com.quantum.sql.metadata.MetaDataJDBCInterface;
  23 import com.quantum.sql.metadata.ObjectMetaData;
  24 import com.quantum.view.LogProxy;
  25 import com.quantum.view.bookmark.EntityNode;
  26 import com.quantum.view.bookmark.TreeNode;
  27
  28
  29 /**
  30  * MultiSQLServer is a Singleton, used  as a interface with the sql drivers.
  31  * Use MultiSQLServer.getInstance() to get the object.
  32  */
  33 public class MultiSQLServer implements ConnectionEstablisher {
  34     private static final int STREAM = 1024 * 2;
  35     public static final String USERNAME = "user"; //$NON-NLS-1$
  36     public static final String PASSWORD = "password"; //$NON-NLS-1$
  37     private static MultiSQLServer instance = null;
  38     boolean running = true;
  39
  40     private MultiSQLServer() {
  41     }
  42     public synchronized static MultiSQLServer getInstance() {
  43         if (instance == null) {
  44             instance = new MultiSQLServer();
  45         }
  46         return instance;
  47     }
  48
  49     public void commit(Connection con) {
  50         LogProxy log = LogProxy.getInstance();
  51         try {
  52             con.commit();
  53         } catch (SQLException e) {
  54             log.addText(LogProxy.ERROR, "Error commiting: " + e, e); //$NON-NLS-1$
  55         }
  56     }
  57
  58     public void rollback(Connection con) {
  59         LogProxy log = LogProxy.getInstance();
  60         try {
  61             con.rollback();
  62         } catch (SQLException e) {
  63             log.addText(LogProxy.ERROR, "Error rolling back: " + e, e); //$NON-NLS-1$
  64         }
  65     }
  66
  67     public void setAutoCommit(Connection con, boolean enabled) {
  68         LogProxy log = LogProxy.getInstance();
  69         try {
  70             if (con != null) {
  71                 con.setAutoCommit(enabled);
  72             } else {
  73                 log.addText(LogProxy.ERROR, "Please connect before setting autocommit"); //$NON-NLS-1$
  74             }
  75         } catch (SQLException e) {
  76             log.addText(LogProxy.ERROR, "Error setting autocommit: " + e, e); //$NON-NLS-1$
  77         }
  78     }
  79
  80     public void disconnect(Connection connection) throws ConnectionException {
  81         try {
  82             if (connection != null) {
  83                 connection.close();
  84             }
  85         } catch (SQLException e) {
  86             throw new ConnectionException(e);
  87         }
  88     }
  89
  90     /**
  91      * Makes a connection to a JDBC driver based on the data from a bookmark
  92      * @param bookmark -
  93      *     The Bookmark with the data needed to make the connection
  94      * @param passwordFinder -
  95      *     A utility class that can be invoked if the bookmark does not
  96      *     include a password
  97      * @return The Connection object if everything went OK
  98      */
  99     public Connection connect(Bookmark bookmark, PasswordFinder passwordFinder)
 100         throws ConnectionException {
 101
 102         String password = bookmark.getPassword();
 103         if (bookmark.getPromptForPassword()) {
 104             password = passwordFinder.getPassword();
 105             if (passwordFinder.isPasswordMeantToBeSaved()) {
 106                 bookmark.setPassword(password);
 107             }
 108         }
 109
 110         if (password != null) {
 111             Connection connection = connect(bookmark, password);
 112             if (connection != null) {
 113                         // Set the autoCommit state of the bookmark to the default on new connections
 114                                 bookmark.setAutoCommit(bookmark.getDefaultAutoCommit());
 115                                 // Set the autoCommit state of the JDBC connection to the bookmark autoCommit statec
 116                         setAutoCommit(connection, bookmark.isAutoCommit());
 117             }
 118                 return connection;
 119         } else {
 120             return null;
 121         }
 122
 123     }
 124     private Connection connect(Bookmark bookmark, String password)
 125         throws ConnectionException {
 126         LogProxy log = LogProxy.getInstance();
 127         log.addText(LogProxy.QUERY, "Connecting to: " + bookmark.getName()); //$NON-NLS-1$
 128         try {
 129                 JDBCDriver jdbcDriver = bookmark.getJDBCDriver();
 130             Driver driver = jdbcDriver.getDriver();
 131             Connection connection = null;
 132             if (driver != null) {
 133                     Properties props = new Properties();
 134                     props.put(USERNAME, bookmark.getUsername());
 135                     props.put(PASSWORD, password);
 136                     connection =
 137                         driver.connect(bookmark.getConnect(), props);
 138                     if (connection == null) {
 139                         throw new ConnectionException("Error: Driver returned a null connection: " + bookmark.toString()); //$NON-NLS-1$
 140                     }
 141
 142                     DatabaseMetaData metaData = connection.getMetaData();
 143                     jdbcDriver.setName(metaData.getDriverName());
 144                     jdbcDriver.setVersion(metaData.getDriverVersion());
 145                     log.addText(LogProxy.RESULTS, "Connected to: " + bookmark.getName()); //$NON-NLS-1$
 146                     System.out.println("Connected"); //$NON-NLS-1$
 147             }
 148             return connection;
 149         } catch (SQLException e) {
 150             throw new ConnectionException(e);
 151         }
 152     }
 153         public SQLResults execute(Connection con, String s) throws SQLException {
 154                 return execute(con, s, -1, -1);
 155         }
 156         public SQLResults execute(Connection con, String s, int startRow, int endRow) throws SQLException {
 157                 return execute(con, s, -1, -1, Integer.MAX_VALUE);
 158         }
 159
 160         public SQLResults execute(Connection con, String s, int startRow, int endRow, int maxLength) throws SQLException {
 161                 return execute(con, s, startRow, endRow, maxLength, ""); //$NON-NLS-1$
 162         }
 163
 164         public SQLResults execute(
 165                 Connection con,
 166                 String s,
 167                 int startRow,
 168                 int endRow,
 169                 int maxLength,
 170                 String encoding)
 171                 throws SQLException {
 172
 173                 SQLResults results = new SQLResults();
 174
 175                 long startTime = System.currentTimeMillis();
 176                 System.out.println("Executing"); //$NON-NLS-1$
 177                 LogProxy log = LogProxy.getInstance();
 178                 log.addText(LogProxy.QUERY, "Executing Request [" + s + "]"); //$NON-NLS-1$ //$NON-NLS-2$
 179                 boolean metadata = false;
 180                 if (s.startsWith("METADATA")) { //$NON-NLS-1$
 181                         metadata = true;
 182                 }
 183                 if (metadata) {
 184                         results.setQuery(s);
 185                         String table = s.substring(s.indexOf(':') + 1);
 186                         String query = "SELECT * FROM " + table + " WHERE (1 = 0)"; //$NON-NLS-1$ //$NON-NLS-2$
 187                         s = query;
 188                         log.addText(LogProxy.QUERY, "Metadata Request [" + s + "]"); //$NON-NLS-1$ //$NON-NLS-2$
 189                 } else {
 190                         results.setQuery(s);
 191                 }
 192
 193                 Statement stmt = con.createStatement();
 194                 boolean flag = stmt.execute(s);
 195                 results.setResultSet(flag);
 196                 if (metadata) {
 197                         genMetadataResultSet(results, stmt);
 198                         return results;
 199                 }
 200                 if (!flag) {
 201                         int updates = stmt.getUpdateCount();
 202                         results.setUpdateCount(updates);
 203                         log.addText(LogProxy.RESULTS, "Success: " + updates + " records updated"); //$NON-NLS-1$ //$NON-NLS-2$
 204
 205                 } else {
 206                         ResultSet set = stmt.getResultSet();
 207                         ResultSetMetaData metaData = set.getMetaData();
 208                         int columnCount = metaData.getColumnCount();
 209                         Vector columnNames = new Vector();
 210                         for (int i = 1; i <= columnCount; i++) {
 211                                 columnNames.addElement(metaData.getColumnName(i));
 212                         }
 213                         results.setColumnNames(columnNames);
 214                         Vector columnTypes = new Vector();
 215                         for (int i = 1; i <= columnCount; i++) {
 216                                 columnTypes.addElement(metaData.getColumnTypeName(i));
 217                         }
 218                         results.setColumnTypes(columnTypes);
 219                         int columnSizes[] = new int[columnCount];
 220                         for (int i = 1; i <= columnCount; i++) {
 221                                 columnSizes[i - 1] = metaData.getColumnDisplaySize(i);
 222                         }
 223                         int rowCount = 1;
 224                         boolean exitEarly = false;
 225                         while (set.next()) {
 226                                 boolean disable = startRow < 1 || endRow < 1;
 227                                 boolean start = rowCount >= startRow;
 228                                 boolean end = rowCount <= endRow;
 229                                 if (disable || (start && end)) {
 230                                         Vector row = new Vector();
 231                                         for (int i = 1; i <= columnCount; i++) {
 232                                                 String value;
 233                                                 if (columnSizes[i - 1] < STREAM
 234                                                         && columnSizes[i - 1] < maxLength) {
 235                                                         if (encoding.equals("")) { //$NON-NLS-1$
 236                                                                 value = set.getString(i);
 237                                                         } else {
 238                                                                 try {
 239                                                                         value =
 240                                                                                 new String(set.getBytes(i), encoding);
 241                                                                 } catch (UnsupportedEncodingException e) {
 242                                                                         log.addText(LogProxy.ERROR, "Error Unsupported encoding " + encoding.toString() + ":" + e.toString(), e); //$NON-NLS-1$ //$NON-NLS-2$
 243                                                                         value = new String(set.getBytes(i));
 244                                                                 }
 245                                                         }
 246                                                 } else {
 247                                                         try {
 248                                                                 if (encoding.equals("")) { //$NON-NLS-1$
 249                                                                         Reader reader = set.getCharacterStream(i);
 250                                                                         StringBuffer buffer = new StringBuffer();
 251                                                                         if (reader != null) {
 252                                                                                 int retVal = reader.read();
 253                                                                                 int count = 0;
 254                                                                                 while (retVal >= 0) {
 255                                                                                         buffer.append((char) retVal);
 256                                                                                         retVal = reader.read();
 257                                                                                         count++;
 258                                                                                         if (count > maxLength) {
 259                                                                                                 buffer.append("...>>>"); //$NON-NLS-1$
 260                                                                                                 break;
 261                                                                                         }
 262                                                                                 }
 263                                                                                 reader.close();
 264                                                                         }
 265                                                                         value = buffer.toString();
 266                                                                 } else {
 267                                                                         InputStream binaryStream =
 268                                                                                 set.getBinaryStream(i);
 269                                                                         ByteArrayOutputStream baos =
 270                                                                                 new ByteArrayOutputStream();
 271                                                                         if (binaryStream != null) {
 272                                                                                 int retVal = binaryStream.read();
 273                                                                                 int count = 0;
 274                                                                                 while (retVal >= 0) {
 275                                                                                         baos.write(retVal);
 276                                                                                         retVal = binaryStream.read();
 277                                                                                         count++;
 278                                                                                         if (count > maxLength) {
 279                                                                                                 break;
 280                                                                                         }
 281                                                                                 }
 282                                                                                 binaryStream.close();
 283                                                                         }
 284                                                                         value =
 285                                                                                 new String(
 286                                                                                         baos.toByteArray(),
 287                                                                                         encoding);
 288                                                                 }
 289                                                         } catch (Throwable e) {
 290                                                                 // hack for mysql which doesn't implement
 291                                                                 // character streams
 292                                                                 value = set.getString(i);
 293                                                         }
 294                                                 }
 295                                                 if (set.wasNull()) {
 296                                                         row.addElement("<NULL>"); //$NON-NLS-1$
 297                                                 } else {
 298                                                         row.addElement(value);
 299                                                 }
 300                                         }
 301                                         results.addRow(row);
 302                                 }
 303                                 rowCount++;
 304                                 if (!disable && (rowCount > endRow)) {
 305                                         exitEarly = true;
 306                                         break;
 307                                 }
 308                         }
 309                         if (exitEarly) {
 310                                 results.setHasMore(set.next());
 311                         } else {
 312                                 results.setMaxSize(rowCount);
 313                                 results.setHasMore(false);
 314                         }
 315                         set.close();
 316                 }
 317                 log.addText(LogProxy.RESULTS, "Success: result set displayed"); //$NON-NLS-1$
 318                 stmt.close();
 319                 results.setTime(System.currentTimeMillis() - startTime);
 320                 System.out.println("Executed"); //$NON-NLS-1$
 321                 System.out.println();
 322                 return results;
 323         }
 324         private void genMetadataResultSet(SQLResults results, Statement stmt)
 325                 throws SQLException {
 326                 ResultSet set = stmt.getResultSet();
 327                 ResultSetMetaData metaData = set.getMetaData();
 328                 int columnCount = metaData.getColumnCount();
 329                 Vector columnNames = new Vector();
 330                 columnNames.addElement("ColumnName"); //$NON-NLS-1$
 331                 columnNames.addElement("Type"); //$NON-NLS-1$
 332                 columnNames.addElement("Size"); //$NON-NLS-1$
 333                 columnNames.addElement("Nullable"); //$NON-NLS-1$
 334                 columnNames.addElement("AutoIncrement"); //$NON-NLS-1$
 335                 results.setColumnNames(columnNames);
 336                 for (int i = 1; i <= columnCount; i++) {
 337                         Vector row = new Vector();
 338                         row.addElement(metaData.getColumnName(i));
 339                         row.addElement(metaData.getColumnTypeName(i));
 340                         int textSize = metaData.getColumnDisplaySize(i);
 341                         int precision = metaData.getPrecision(i);
 342                         int scale = metaData.getScale(i);
 343                         if (scale == 0 && precision == 0) {
 344                                 row.addElement(Integer.toString(precision));
 345                         } else {
 346                                 row.addElement(textSize + ", " + precision + ", " + scale); //$NON-NLS-1$ //$NON-NLS-2$
 347                         }
 348                         int nullable = metaData.isNullable(i);
 349                         if (nullable == ResultSetMetaData.columnNoNulls) {
 350                                 row.addElement("Not Null"); //$NON-NLS-1$
 351                         } else if (nullable == ResultSetMetaData.columnNullable) {
 352                                 row.addElement("Nullable"); //$NON-NLS-1$
 353                         } else if (
 354                                 nullable == ResultSetMetaData.columnNullableUnknown) {
 355                                 row.addElement("Nullable"); //$NON-NLS-1$
 356                         } else {
 357                                 row.addElement("<Error>"); //$NON-NLS-1$
 358                         }
 359                         row.addElement(
 360                                 (metaData.isAutoIncrement(i)
 361                                         ? Boolean.TRUE
 362                                         : Boolean.FALSE)
 363                                         .toString());
 364                         results.addRow(row);
 365                 }
 366                 results.setHasMore(false);
 367                 set.close();
 368         }
 369
 370         /**
 371          * Returns an ObjectMetadata object got from the connection 'con' using the name and schema of the node.
 372          * @param con
 373          * @param node
 374          * @return
 375          * @throws SQLException
 376          */
 377         public ObjectMetaData getObjectMetadata(Connection con, TreeNode node) throws SQLException {
 378                 ObjectMetaData metadata = new ObjectMetaData();
 379                 if (!(node instanceof Entity)) return metadata;
 380
 381                 String schema = ((Entity)node).getSchema();
 382                 String tableName = node.getName();
 383
 384                 if (schema.length() == 0) schema = null;
 385                 metadata.setColumns(MetaDataJDBCInterface.getColumns(con, schema, tableName));
 386                 if (node instanceof EntityNode && ((EntityNode) node).isTable()) {
 387                         metadata.setPrimaryKeys(MetaDataJDBCInterface.getPrimaryKeys(con, schema, tableName));
 388                         metadata.setForeignKeys(MetaDataJDBCInterface.getForeignKeys(con, schema, tableName, true));
 389                         metadata.setIndexInfo(MetaDataJDBCInterface.getIndexInfo(con, schema, tableName));
 390                         metadata.setBestRowId(MetaDataJDBCInterface.getBestRowId(con, schema, tableName));
 391                 }
 392                 return metadata;
 393         }
 394
 395 }