コード例 #1
0
ファイル: JoinTable.java プロジェクト: NCCUCS-PLSM/SaaS-Data
 /**
  * Convenience logging method to output the mapping information for an element, key, value field
  *
  * @param mapping The mapping
  */
 protected void debugMapping(JavaTypeMapping mapping) {
   if (NucleusLogger.DATASTORE.isDebugEnabled()) {
     // Provide field->column mapping debug message
     StringBuffer columnsStr = new StringBuffer();
     for (int i = 0; i < mapping.getNumberOfDatastoreMappings(); i++) {
       if (i > 0) {
         columnsStr.append(",");
       }
       columnsStr.append(mapping.getDatastoreMapping(i).getDatastoreField());
     }
     if (mapping.getNumberOfDatastoreMappings() == 0) {
       columnsStr.append("[none]");
     }
     StringBuffer datastoreMappingTypes = new StringBuffer();
     for (int i = 0; i < mapping.getNumberOfDatastoreMappings(); i++) {
       if (i > 0) {
         datastoreMappingTypes.append(',');
       }
       datastoreMappingTypes.append(mapping.getDatastoreMapping(i).getClass().getName());
     }
     NucleusLogger.DATASTORE.debug(
         LOCALISER.msg(
             "057010",
             mmd.getFullFieldName(),
             columnsStr.toString(),
             mapping.getClass().getName(),
             datastoreMappingTypes.toString()));
   }
 }
コード例 #2
0
  /**
   * Convenience method to create a new PreparedStatement for a query.
   *
   * @param conn The Connection to use for the statement
   * @param stmtText Statement text
   * @param resultSetType Type of result set
   * @param resultSetConcurrency Concurrency for the result set
   * @return The PreparedStatement
   * @throws SQLException thrown if an error occurs creating the statement
   */
  public PreparedStatement getStatementForQuery(
      ManagedConnection conn, String stmtText, String resultSetType, String resultSetConcurrency)
      throws SQLException {
    Connection c = (Connection) conn.getConnection();
    if (supportsBatching) {
      // Check for a waiting batched statement that is ready for processing
      ConnectionStatementState state = getConnectionStatementState(conn);
      if (state != null && state.processable) {
        // Process the batch statement before returning our new query statement
        processConnectionStatement(conn);
      }
    }

    // Create a new PreparedStatement for this query
    PreparedStatement ps = null;
    if (resultSetType != null || resultSetConcurrency != null) {
      int rsTypeValue = ResultSet.TYPE_FORWARD_ONLY;
      if (resultSetType != null) {
        if (resultSetType.equals("scroll-sensitive")) {
          rsTypeValue = ResultSet.TYPE_SCROLL_SENSITIVE;
        } else if (resultSetType.equals("scroll-insensitive")) {
          rsTypeValue = ResultSet.TYPE_SCROLL_INSENSITIVE;
        }
      }

      int rsConcurrencyValue = ResultSet.CONCUR_READ_ONLY;
      if (resultSetConcurrency != null && resultSetConcurrency.equals("updateable")) {
        rsConcurrencyValue = ResultSet.CONCUR_UPDATABLE;
      }
      ps = c.prepareStatement(stmtText, rsTypeValue, rsConcurrencyValue);
      ps
          .clearBatch(); // In case using statement caching and given one with batched statements
                         // left hanging (C3P0)
    } else {
      ps = c.prepareStatement(stmtText);
      ps
          .clearBatch(); // In case using statement caching and given one with batched statements
                         // left hanging (C3P0)
    }

    if (queryTimeout > 0) {
      // Apply any query timeout
      ps.setQueryTimeout(queryTimeout / 1000); // queryTimeout is in milliseconds
    }
    if (NucleusLogger.DATASTORE.isDebugEnabled()) {
      NucleusLogger.DATASTORE.debug(LOCALISER.msg("052110", StringUtils.toJVMIDString(ps)));
    }

    if (!jdbcStatements) {
      // Wrap with our parameter logger
      ps = new ParamLoggingPreparedStatement(ps, stmtText);
      ((ParamLoggingPreparedStatement) ps).setParamsInAngleBrackets(paramValuesInBrackets);
    }

    return ps;
  }
コード例 #3
0
  /** Convenience method to log the configuration of this store manager. */
  protected void logConfiguration() {
    super.logConfiguration();

    if (NucleusLogger.DATASTORE.isDebugEnabled()) {
      NucleusLogger.DATASTORE.debug("StorageVersion : " + storageVersion.toString());
      NucleusLogger.DATASTORE.debug(
          "Default Relation Mode : " + getStringProperty(RELATION_DEFAULT_MODE));
      NucleusLogger.DATASTORE.debug("===========================================================");
    }
  }
コード例 #4
0
 /**
  * Convenience method to close a PreparedStatement. If the statement is currently being used as a
  * batch, will register it for closing when executing the batch
  *
  * @param conn The Connection
  * @param ps The PreparedStatement
  * @throws SQLException if an error occurs closing the statement
  */
 public void closeStatement(ManagedConnection conn, PreparedStatement ps) throws SQLException {
   ConnectionStatementState state = getConnectionStatementState(conn);
   if (state != null && state.stmt == ps) {
     // Statement to be closed is the current batch, so register it for closing when it gets
     // processed
     state.closeStatementOnProcess = true;
   } else {
     try {
       if (NucleusLogger.DATASTORE.isDebugEnabled()) {
         NucleusLogger.DATASTORE.debug(LOCALISER.msg("052110", StringUtils.toJVMIDString(ps)));
       }
       ps.close();
     } catch (SQLException sqle) {
       // workaround for DBCP bug: even though PreparedStatement.close()
       // is defined as having no effect if already closed, DBCP
       // will throw SQLException
       if (!sqle.getMessage().equals("Already closed")) {
         throw sqle;
       }
     }
   }
 }
コード例 #5
0
  /**
   * Convenience method to process the currently waiting statement for the passed Connection. Only
   * processes the statement if it is in processable state.
   *
   * @param conn The connection
   * @return The return codes from the statement batch
   * @throws SQLException if an error occurs processing the batch
   */
  protected int[] processConnectionStatement(ManagedConnection conn) throws SQLException {
    ConnectionStatementState state = getConnectionStatementState(conn);
    if (state == null || !state.processable) {
      return null;
    }

    long startTime = System.currentTimeMillis();
    if (NucleusLogger.DATASTORE_NATIVE.isDebugEnabled()) {
      if (state.stmt instanceof ParamLoggingPreparedStatement) {
        NucleusLogger.DATASTORE_NATIVE.debug(
            ((ParamLoggingPreparedStatement) state.stmt).getStatementWithParamsReplaced());
      } else {
        NucleusLogger.DATASTORE_NATIVE.debug(state.stmtText);
      }
    }

    int[] ind = state.stmt.executeBatch();
    state.stmt.clearBatch();

    if (NucleusLogger.DATASTORE.isDebugEnabled()) {
      NucleusLogger.DATASTORE.debug(
          LOCALISER.msg(
              "045001",
              "" + (System.currentTimeMillis() - startTime),
              StringUtils.intArrayToString(ind),
              StringUtils.toJVMIDString(state.stmt)));
    }

    // Remove the current connection statement
    removeConnectionStatementState(conn);

    // Close the statement if it is registered for closing after processing
    if (state.closeStatementOnProcess) {
      state.stmt.close();
    }

    return ind;
  }
コード例 #6
0
  /**
   * Utility that does a discriminator candidate query for the specified candidate and subclasses
   * and returns the class name of the instance that has the specified identity (if any).
   *
   * @param storeMgr RDBMS StoreManager
   * @param ec execution context
   * @param id The id
   * @param cmd Metadata for the root candidate class
   * @return Name of the class with this identity (or null if none found)
   */
  public static String getClassNameForIdUsingDiscriminator(
      RDBMSStoreManager storeMgr, ExecutionContext ec, Object id, AbstractClassMetaData cmd) {
    // Check for input error
    if (cmd == null || id == null) {
      return null;
    }

    SQLExpressionFactory exprFactory = storeMgr.getSQLExpressionFactory();
    ClassLoaderResolver clr = ec.getClassLoaderResolver();
    DatastoreClass primaryTable = storeMgr.getDatastoreClass(cmd.getFullClassName(), clr);

    // Form the query to find which one of these classes has the instance with this id
    DiscriminatorStatementGenerator stmtGen =
        new DiscriminatorStatementGenerator(
            storeMgr, clr, clr.classForName(cmd.getFullClassName()), true, null, null);
    stmtGen.setOption(SelectStatementGenerator.OPTION_RESTRICT_DISCRIM);
    SelectStatement sqlStmt = stmtGen.getStatement();

    // Select the discriminator
    JavaTypeMapping discrimMapping = primaryTable.getDiscriminatorMapping(true);
    SQLTable discrimSqlTbl =
        SQLStatementHelper.getSQLTableForMappingOfTable(
            sqlStmt, sqlStmt.getPrimaryTable(), discrimMapping);
    sqlStmt.select(discrimSqlTbl, discrimMapping, null);

    // Restrict to this id
    JavaTypeMapping idMapping = primaryTable.getIdMapping();
    JavaTypeMapping idParamMapping = new PersistableIdMapping((PersistableMapping) idMapping);
    SQLExpression sqlFldExpr =
        exprFactory.newExpression(sqlStmt, sqlStmt.getPrimaryTable(), idMapping);
    SQLExpression sqlFldVal = exprFactory.newLiteralParameter(sqlStmt, idParamMapping, id, "ID");
    sqlStmt.whereAnd(sqlFldExpr.eq(sqlFldVal), true);

    // Perform the query
    try {
      ManagedConnection mconn = storeMgr.getConnection(ec);
      SQLController sqlControl = storeMgr.getSQLController();
      if (ec.getSerializeReadForClass(cmd.getFullClassName())) {
        sqlStmt.addExtension(SQLStatement.EXTENSION_LOCK_FOR_UPDATE, true);
      }

      try {
        PreparedStatement ps =
            SQLStatementHelper.getPreparedStatementForSQLStatement(sqlStmt, ec, mconn, null, null);
        String statement = sqlStmt.getSQLText().toSQL();
        try {
          ResultSet rs = sqlControl.executeStatementQuery(ec, mconn, statement, ps);
          try {
            if (rs != null) {
              while (rs.next()) {
                DiscriminatorMetaData dismd = discrimMapping.getTable().getDiscriminatorMetaData();
                return RDBMSQueryUtils.getClassNameFromDiscriminatorResultSetRow(
                    discrimMapping, dismd, rs, ec);
              }
            }
          } finally {
            rs.close();
          }
        } finally {
          sqlControl.closeStatement(mconn, ps);
        }
      } finally {
        mconn.release();
      }
    } catch (SQLException sqe) {
      NucleusLogger.DATASTORE.error("Exception thrown on querying of discriminator for id", sqe);
      throw new NucleusDataStoreException(sqe.toString(), sqe);
    }

    return null;
  }
コード例 #7
0
  /**
   * Utility that does a union candidate query for the specified candidate(s) and subclasses and
   * returns the class name of the instance that has the specified identity (if any).
   *
   * @param storeMgr RDBMS StoreManager
   * @param ec execution context
   * @param id The id
   * @param rootCmds Metadata for the classes at the root
   * @return Name of the class with this identity (or null if none found)
   */
  public static String getClassNameForIdUsingUnion(
      RDBMSStoreManager storeMgr,
      ExecutionContext ec,
      Object id,
      List<AbstractClassMetaData> rootCmds) {
    // Check for input error
    if (rootCmds == null || rootCmds.isEmpty() || id == null) {
      return null;
    }

    SQLExpressionFactory exprFactory = storeMgr.getSQLExpressionFactory();
    ClassLoaderResolver clr = ec.getClassLoaderResolver();

    // Form a query UNIONing all possible root candidates (and their subclasses)
    Iterator<AbstractClassMetaData> rootCmdIter = rootCmds.iterator();

    AbstractClassMetaData sampleCmd =
        null; // Metadata for sample class in the tree so we can check if needs locking
    SelectStatement sqlStmtMain = null;
    while (rootCmdIter.hasNext()) {
      AbstractClassMetaData rootCmd = rootCmdIter.next();
      DatastoreClass rootTbl = storeMgr.getDatastoreClass(rootCmd.getFullClassName(), clr);
      if (rootTbl == null) {
        // Class must be using "subclass-table" (no table of its own) so find where it is
        AbstractClassMetaData[] subcmds = storeMgr.getClassesManagingTableForClass(rootCmd, clr);
        if (subcmds == null || subcmds.length == 0) {
          // No table for this class so ignore
        } else {
          for (int i = 0; i < subcmds.length; i++) {
            UnionStatementGenerator stmtGen =
                new UnionStatementGenerator(
                    storeMgr,
                    clr,
                    clr.classForName(subcmds[i].getFullClassName()),
                    true,
                    null,
                    null);
            stmtGen.setOption(SelectStatementGenerator.OPTION_SELECT_NUCLEUS_TYPE);
            if (sqlStmtMain == null) {
              sampleCmd = subcmds[i];
              sqlStmtMain = stmtGen.getStatement();

              // WHERE (object id) = ?
              JavaTypeMapping idMapping = sqlStmtMain.getPrimaryTable().getTable().getIdMapping();
              JavaTypeMapping idParamMapping =
                  new PersistableIdMapping((PersistableMapping) idMapping);
              SQLExpression fieldExpr =
                  exprFactory.newExpression(sqlStmtMain, sqlStmtMain.getPrimaryTable(), idMapping);
              SQLExpression fieldVal =
                  exprFactory.newLiteralParameter(sqlStmtMain, idParamMapping, id, "ID");
              sqlStmtMain.whereAnd(fieldExpr.eq(fieldVal), true);
            } else {
              SelectStatement sqlStmt = stmtGen.getStatement();

              // WHERE (object id) = ?
              JavaTypeMapping idMapping = sqlStmt.getPrimaryTable().getTable().getIdMapping();
              JavaTypeMapping idParamMapping =
                  new PersistableIdMapping((PersistableMapping) idMapping);
              SQLExpression fieldExpr =
                  exprFactory.newExpression(sqlStmt, sqlStmt.getPrimaryTable(), idMapping);
              SQLExpression fieldVal =
                  exprFactory.newLiteralParameter(sqlStmt, idParamMapping, id, "ID");
              sqlStmt.whereAnd(fieldExpr.eq(fieldVal), true);

              sqlStmtMain.union(sqlStmt);
            }
          }
        }
      } else {
        UnionStatementGenerator stmtGen =
            new UnionStatementGenerator(
                storeMgr, clr, clr.classForName(rootCmd.getFullClassName()), true, null, null);
        stmtGen.setOption(SelectStatementGenerator.OPTION_SELECT_NUCLEUS_TYPE);
        if (sqlStmtMain == null) {
          sampleCmd = rootCmd;
          sqlStmtMain = stmtGen.getStatement();

          // WHERE (object id) = ?
          JavaTypeMapping idMapping = sqlStmtMain.getPrimaryTable().getTable().getIdMapping();
          JavaTypeMapping idParamMapping = new PersistableIdMapping((PersistableMapping) idMapping);
          SQLExpression fieldExpr =
              exprFactory.newExpression(sqlStmtMain, sqlStmtMain.getPrimaryTable(), idMapping);
          SQLExpression fieldVal =
              exprFactory.newLiteralParameter(sqlStmtMain, idParamMapping, id, "ID");
          sqlStmtMain.whereAnd(fieldExpr.eq(fieldVal), true);
        } else {
          SelectStatement sqlStmt = stmtGen.getStatement();

          // WHERE (object id) = ?
          JavaTypeMapping idMapping = sqlStmt.getPrimaryTable().getTable().getIdMapping();
          JavaTypeMapping idParamMapping = new PersistableIdMapping((PersistableMapping) idMapping);
          SQLExpression fieldExpr =
              exprFactory.newExpression(sqlStmt, sqlStmt.getPrimaryTable(), idMapping);
          SQLExpression fieldVal =
              exprFactory.newLiteralParameter(sqlStmt, idParamMapping, id, "ID");
          sqlStmt.whereAnd(fieldExpr.eq(fieldVal), true);

          sqlStmtMain.union(sqlStmt);
        }
      }
    }

    // Perform the query
    try {
      ManagedConnection mconn = storeMgr.getConnection(ec);
      SQLController sqlControl = storeMgr.getSQLController();
      if (ec.getSerializeReadForClass(sampleCmd.getFullClassName())) {
        sqlStmtMain.addExtension(SQLStatement.EXTENSION_LOCK_FOR_UPDATE, true);
      }

      try {
        PreparedStatement ps =
            SQLStatementHelper.getPreparedStatementForSQLStatement(
                sqlStmtMain, ec, mconn, null, null);
        String statement = sqlStmtMain.getSQLText().toSQL();
        try {
          ResultSet rs = sqlControl.executeStatementQuery(ec, mconn, statement, ps);
          try {
            if (rs != null) {
              while (rs.next()) {
                try {
                  return rs.getString(UnionStatementGenerator.NUC_TYPE_COLUMN).trim();
                } catch (SQLException sqle) {
                }
              }
            }
          } finally {
            rs.close();
          }
        } finally {
          sqlControl.closeStatement(mconn, ps);
        }
      } finally {
        mconn.release();
      }
    } catch (SQLException sqe) {
      NucleusLogger.DATASTORE.error("Exception with UNION statement", sqe);
      throw new NucleusDataStoreException(sqe.toString());
    }

    return null;
  }
コード例 #8
0
  /**
   * Method to initialise the table definition.
   *
   * @param clr The ClassLoaderResolver
   */
  public void initialize(ClassLoaderResolver clr) {
    assertIsUninitialized();

    MapMetaData mapmd = mmd.getMap();
    if (mapmd == null) {
      throw new NucleusUserException(Localiser.msg("057017", mmd));
    }

    PrimaryKeyMetaData pkmd =
        (mmd.getJoinMetaData() != null ? mmd.getJoinMetaData().getPrimaryKeyMetaData() : null);
    boolean pkColsSpecified = (pkmd != null && pkmd.getColumnMetaData() != null);
    boolean pkRequired = requiresPrimaryKey();

    // Add owner mapping
    ColumnMetaData[] ownerColmd = null;
    if (mmd.getJoinMetaData() != null
        && mmd.getJoinMetaData().getColumnMetaData() != null
        && mmd.getJoinMetaData().getColumnMetaData().length > 0) {
      // Column mappings defined at this side (1-N, M-N)
      // When specified at this side they use the <join> tag
      ownerColmd = mmd.getJoinMetaData().getColumnMetaData();
    }
    ownerMapping =
        ColumnCreator.createColumnsForJoinTables(
            clr.classForName(ownerType),
            mmd,
            ownerColmd,
            storeMgr,
            this,
            pkRequired,
            false,
            FieldRole.ROLE_OWNER,
            clr);
    if (NucleusLogger.DATASTORE.isDebugEnabled()) {
      logMapping(mmd.getFullFieldName() + ".[OWNER]", ownerMapping);
    }

    String keyValueFieldName =
        (mmd.getKeyMetaData() != null ? mmd.getKeyMetaData().getMappedBy() : null);
    String valueKeyFieldName =
        (mmd.getValueMetaData() != null ? mmd.getValueMetaData().getMappedBy() : null);

    // Add key mapping
    boolean keyPC = (mmd.hasMap() && mmd.getMap().keyIsPersistent());
    Class keyCls = clr.classForName(mapmd.getKeyType());
    if (keyValueFieldName != null && isEmbeddedValuePC()) {
      // Added in value code
    } else if (isSerialisedKey()
        || isEmbeddedKeyPC()
        || (isEmbeddedKey() && !keyPC)
        || ClassUtils.isReferenceType(keyCls)) {
      // Key = PC(embedded), PC(serialised), Non-PC(serialised), Non-PC(embedded), Reference
      keyMapping = storeMgr.getMappingManager().getMapping(this, mmd, clr, FieldRole.ROLE_MAP_KEY);
      if (Boolean.TRUE.equals(mmd.getContainer().allowNulls())) {
        // Make all key col(s) nullable so we can store null elements
        for (int i = 0; i < keyMapping.getNumberOfDatastoreMappings(); i++) {
          Column elementCol = keyMapping.getDatastoreMapping(i).getColumn();
          elementCol.setNullable(true);
        }
      }
      if (NucleusLogger.DATASTORE.isDebugEnabled()) {
        logMapping(mmd.getFullFieldName() + ".[KEY]", keyMapping);
      }
      if (valueKeyFieldName != null && isEmbeddedKeyPC()) {
        // Key (PC) is embedded and value is a field of the key
        EmbeddedKeyPCMapping embMapping = (EmbeddedKeyPCMapping) keyMapping;
        valueMapping = embMapping.getJavaTypeMapping(valueKeyFieldName);
      }
    } else {
      // Key = PC
      ColumnMetaData[] keyColmd = null;
      KeyMetaData keymd = mmd.getKeyMetaData();
      if (keymd != null
          && keymd.getColumnMetaData() != null
          && keymd.getColumnMetaData().length > 0) {
        // Column mappings defined at this side (1-N, M-N)
        keyColmd = keymd.getColumnMetaData();
      }
      keyMapping =
          ColumnCreator.createColumnsForJoinTables(
              keyCls, mmd, keyColmd, storeMgr, this, false, false, FieldRole.ROLE_MAP_KEY, clr);
      if (mmd.getContainer().allowNulls() == Boolean.TRUE) {
        // Make all key col(s) nullable so we can store null elements
        for (int i = 0; i < keyMapping.getNumberOfDatastoreMappings(); i++) {
          Column elementCol = keyMapping.getDatastoreMapping(i).getColumn();
          elementCol.setNullable(true);
        }
      }
      if (NucleusLogger.DATASTORE.isDebugEnabled()) {
        logMapping(mmd.getFullFieldName() + ".[KEY]", keyMapping);
      }
    }

    // Add value mapping
    boolean valuePC = (mmd.hasMap() && mmd.getMap().valueIsPersistent());
    Class valueCls = clr.classForName(mapmd.getValueType());
    if (valueKeyFieldName != null && isEmbeddedKeyPC()) {
      // Added in key code
    } else if (isSerialisedValue()
        || isEmbeddedValuePC()
        || (isEmbeddedValue() && !valuePC)
        || ClassUtils.isReferenceType(valueCls)) {
      // Value = PC(embedded), PC(serialised), Non-PC(serialised), Non-PC(embedded), Reference
      valueMapping =
          storeMgr.getMappingManager().getMapping(this, mmd, clr, FieldRole.ROLE_MAP_VALUE);
      if (mmd.getContainer().allowNulls() == Boolean.TRUE) {
        // Make all value col(s) nullable so we can store null elements
        for (int i = 0; i < valueMapping.getNumberOfDatastoreMappings(); i++) {
          Column elementCol = valueMapping.getDatastoreMapping(i).getColumn();
          elementCol.setNullable(true);
        }
      }
      if (NucleusLogger.DATASTORE.isDebugEnabled()) {
        logMapping(mmd.getFullFieldName() + ".[VALUE]", valueMapping);
      }
      if (keyValueFieldName != null && isEmbeddedValuePC()) {
        // Value (PC) is embedded and key is a field of the value
        EmbeddedValuePCMapping embMapping = (EmbeddedValuePCMapping) valueMapping;
        keyMapping = embMapping.getJavaTypeMapping(keyValueFieldName);
      }
    } else {
      // Value = PC
      ColumnMetaData[] valueColmd = null;
      ValueMetaData valuemd = mmd.getValueMetaData();
      if (valuemd != null
          && valuemd.getColumnMetaData() != null
          && valuemd.getColumnMetaData().length > 0) {
        // Column mappings defined at this side (1-N, M-N)
        valueColmd = valuemd.getColumnMetaData();
      }
      valueMapping =
          ColumnCreator.createColumnsForJoinTables(
              clr.classForName(mapmd.getValueType()),
              mmd,
              valueColmd,
              storeMgr,
              this,
              false,
              true,
              FieldRole.ROLE_MAP_VALUE,
              clr);
      if (mmd.getContainer().allowNulls() == Boolean.TRUE) {
        // Make all value col(s) nullable so we can store null elements
        for (int i = 0; i < valueMapping.getNumberOfDatastoreMappings(); i++) {
          Column elementCol = valueMapping.getDatastoreMapping(i).getColumn();
          elementCol.setNullable(true);
        }
      }
      if (NucleusLogger.DATASTORE.isDebugEnabled()) {
        logMapping(mmd.getFullFieldName() + ".[VALUE]", valueMapping);
      }
    }

    // Add order mapping if required
    boolean orderRequired = false;
    if (mmd.getOrderMetaData() != null) {
      // User requested order column so add one
      orderRequired = true;
    } else if (requiresPrimaryKey() && !pkColsSpecified) {
      // PK is required so maybe need to add an index to form the PK
      if (isEmbeddedKeyPC()) {
        if (mmd.getMap().getKeyClassMetaData(clr, storeMgr.getMetaDataManager()).getIdentityType()
            != IdentityType.APPLICATION) {
          // Embedded key PC with datastore id so we need an index to form the PK
          orderRequired = true;
        }
      } else if (isSerialisedKey()) {
        // Serialised key, so need an index to form the PK
        orderRequired = true;
      } else if (keyMapping instanceof ReferenceMapping) {
        // ReferenceMapping, so have order if more than 1 implementation
        ReferenceMapping refMapping = (ReferenceMapping) keyMapping;
        if (refMapping.getJavaTypeMapping().length > 1) {
          orderRequired = true;
        }
      } else if (!(keyMapping instanceof PersistableMapping)) {
        // Non-PC, so depends if the key column can be used as part of a PK
        // TODO This assumes the keyMapping has a single column but what if it is Color with 4 cols?
        Column elementCol = keyMapping.getDatastoreMapping(0).getColumn();
        if (!storeMgr.getDatastoreAdapter().isValidPrimaryKeyType(elementCol.getJdbcType())) {
          // Not possible to use this Non-PC type as part of the PK
          orderRequired = true;
        }
      }
    }
    if (orderRequired) {
      // Order/Adapter (index) column is required (integer based)
      ColumnMetaData orderColmd = null;
      if (mmd.getOrderMetaData() != null
          && mmd.getOrderMetaData().getColumnMetaData() != null
          && mmd.getOrderMetaData().getColumnMetaData().length > 0) {
        // Specified "order" column info
        orderColmd = mmd.getOrderMetaData().getColumnMetaData()[0];
        if (orderColmd.getName() == null) {
          // No column name so use default
          orderColmd = new ColumnMetaData(orderColmd);
          DatastoreIdentifier id = storeMgr.getIdentifierFactory().newIndexFieldIdentifier(mmd);
          orderColmd.setName(id.getName());
        }
      } else {
        // No column name so use default
        DatastoreIdentifier id = storeMgr.getIdentifierFactory().newIndexFieldIdentifier(mmd);
        orderColmd = new ColumnMetaData();
        orderColmd.setName(id.getName());
      }
      orderMapping =
          storeMgr
              .getMappingManager()
              .getMapping(int.class); // JDO2 spec [18.5] order column is assumed to be "int"
      ColumnCreator.createIndexColumn(
          orderMapping, storeMgr, clr, this, orderColmd, pkRequired && !pkColsSpecified);
      if (NucleusLogger.DATASTORE.isDebugEnabled()) {
        logMapping(mmd.getFullFieldName() + ".[ORDER]", orderMapping);
      }
    }

    // Define primary key of the join table (if any)
    if (pkRequired) {
      if (pkColsSpecified) {
        // Apply the users PK specification
        applyUserPrimaryKeySpecification(pkmd);
      } else {
        // Define PK using internal rules
        if (orderRequired) {
          // Order column specified so owner+order are the PK
          orderMapping.getDatastoreMapping(0).getColumn().setPrimaryKey();
        } else {
          // No order column specified so owner+key are the PK
          for (int i = 0; i < keyMapping.getNumberOfDatastoreMappings(); i++) {
            keyMapping.getDatastoreMapping(i).getColumn().setPrimaryKey();
          }
        }
      }
    }

    if (NucleusLogger.DATASTORE_SCHEMA.isDebugEnabled()) {
      NucleusLogger.DATASTORE_SCHEMA.debug(Localiser.msg("057023", this));
    }
    storeMgr.registerTableInitialized(this);
    state = TABLE_STATE_INITIALIZED;
  }
コード例 #9
0
  /**
   * Convenience method to create a new PreparedStatement for an update.
   *
   * @param conn The Connection to use for the statement
   * @param stmtText Statement text
   * @param batchable Whether this statement is batchable. Whether we will process the statement
   *     before any other statement
   * @param getGeneratedKeysFlag whether to request getGeneratedKeys for this statement
   * @return The PreparedStatement
   * @throws SQLException thrown if an error occurs creating the statement
   */
  public PreparedStatement getStatementForUpdate(
      ManagedConnection conn, String stmtText, boolean batchable, boolean getGeneratedKeysFlag)
      throws SQLException {
    Connection c = (Connection) conn.getConnection();
    if (supportsBatching) {
      ConnectionStatementState state = getConnectionStatementState(conn);
      if (state != null) {
        if (state.processable) {
          // We have a batchable statement in the queue that could be processed now if necessary
          if (!batchable) {
            // This new statement isnt batchable so process the existing one before returning our
            // new statement
            processConnectionStatement(conn);
          } else {
            // Check if we could batch onto this existing statement
            if (state.stmtText.equals(stmtText)) {
              // We can batch onto this statement
              if (maxBatchSize == -1 || state.batchSize < maxBatchSize) {
                state.batchSize++;
                state.processable =
                    false; // Have to wait til we process this part til processable again
                if (NucleusLogger.DATASTORE_PERSIST.isDebugEnabled()) {
                  NucleusLogger.DATASTORE_PERSIST.debug(
                      LOCALISER.msg("052100", stmtText, "" + state.batchSize));
                }
                return state.stmt;
              } else {
                // Reached max batch size so process it now and start again for this one
                if (NucleusLogger.DATASTORE_PERSIST.isDebugEnabled()) {
                  NucleusLogger.DATASTORE_PERSIST.debug(LOCALISER.msg("052101", state.stmtText));
                }
                processConnectionStatement(conn);
              }
            } else {
              // We cant batch using the current batch statement so process it first and return our
              // new one
              processConnectionStatement(conn);
            }
          }
        } else {
          if (batchable) {
            // The current statement is being batched so we cant batch this since cant process the
            // current statement now
            if (NucleusLogger.DATASTORE_PERSIST.isDebugEnabled()) {
              NucleusLogger.DATASTORE_PERSIST.debug(
                  LOCALISER.msg("052102", state.stmtText, stmtText));
            }
            batchable = false;
          }
        }
      }
    }

    PreparedStatement ps =
        (getGeneratedKeysFlag
            ? c.prepareStatement(stmtText, Statement.RETURN_GENERATED_KEYS)
            : c.prepareStatement(stmtText));
    ps
        .clearBatch(); // In case using statement caching and given one with batched statements left
                       // hanging (C3P0)
    if (!jdbcStatements) {
      // Wrap with our parameter logger
      ps = new ParamLoggingPreparedStatement(ps, stmtText);
      ((ParamLoggingPreparedStatement) ps).setParamsInAngleBrackets(paramValuesInBrackets);
    }
    if (NucleusLogger.DATASTORE.isDebugEnabled()) {
      NucleusLogger.DATASTORE.debug(LOCALISER.msg("052109", ps, StringUtils.toJVMIDString(c)));
    }

    if (batchable && supportsBatching) {
      // This statement is batchable so save it as the current batchable
      if (NucleusLogger.DATASTORE_PERSIST.isDebugEnabled()) {
        NucleusLogger.DATASTORE_PERSIST.debug(LOCALISER.msg("052103", stmtText));
      }
      ConnectionStatementState state = new ConnectionStatementState();
      state.stmt = ps;
      state.stmtText = stmtText;
      state.batchSize = 1;
      setConnectionStatementState(conn, state);
    }

    return ps;
  }