| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.openjpa.jdbc.kernel; |
| |
| import java.sql.Connection; |
| import java.sql.PreparedStatement; |
| import java.sql.ResultSet; |
| import java.sql.SQLException; |
| import java.sql.SQLWarning; |
| import java.sql.Statement; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.LinkedList; |
| import java.util.List; |
| |
| import org.apache.openjpa.jdbc.conf.JDBCConfiguration; |
| import org.apache.openjpa.jdbc.identifier.DBIdentifier; |
| import org.apache.openjpa.jdbc.identifier.DBIdentifier.DBIdentifierType; |
| import org.apache.openjpa.jdbc.meta.ClassMapping; |
| import org.apache.openjpa.jdbc.meta.FieldMapping; |
| import org.apache.openjpa.jdbc.schema.Column; |
| import org.apache.openjpa.jdbc.sql.DBDictionary; |
| import org.apache.openjpa.jdbc.sql.Row; |
| import org.apache.openjpa.jdbc.sql.RowImpl; |
| import org.apache.openjpa.jdbc.sql.SQLExceptions; |
| import org.apache.openjpa.kernel.OpenJPAStateManager; |
| import org.apache.openjpa.kernel.StateManagerImpl; |
| import org.apache.openjpa.lib.log.Log; |
| import org.apache.openjpa.lib.util.Localizer; |
| import org.apache.openjpa.meta.ValueStrategies; |
| import org.apache.openjpa.util.ApplicationIds; |
| import org.apache.openjpa.util.OpenJPAException; |
| import org.apache.openjpa.util.OptimisticException; |
| |
| /** |
| * Basic prepared statement manager implementation. |
| * |
| * @author Abe White |
| */ |
| public class PreparedStatementManagerImpl |
| implements PreparedStatementManager { |
| |
| private final static Localizer _loc = Localizer |
| .forPackage(PreparedStatementManagerImpl.class); |
| |
| protected final JDBCStore _store; |
| protected final Connection _conn; |
| protected final DBDictionary _dict; |
| protected transient Log _log = null; |
| |
| // track exceptions |
| protected final Collection<Exception> _exceptions = new LinkedList<>(); |
| |
| /** |
| * Constructor. Supply connection. |
| */ |
| public PreparedStatementManagerImpl(JDBCStore store, Connection conn) { |
| _store = store; |
| _dict = store.getDBDictionary(); |
| _conn = conn; |
| if (store.getConfiguration() != null) |
| _log = store.getConfiguration().getLog(JDBCConfiguration.LOG_JDBC); |
| } |
| |
| @Override |
| public Collection<Exception> getExceptions() { |
| return _exceptions; |
| } |
| |
| @Override |
| public void flush(RowImpl row) { |
| try { |
| if (!row.isFlushed()) |
| flushInternal(row); |
| } catch (SQLException se) { |
| _exceptions.add(SQLExceptions.getStore(se, _dict)); |
| } catch (OpenJPAException ke) { |
| _exceptions.add(ke); |
| } |
| } |
| |
| /** |
| * Flush the given row. |
| */ |
| protected void flushInternal(RowImpl row) throws SQLException { |
| flushAndUpdate(row); |
| } |
| |
| /** |
| * Flush the given row immediately. |
| */ |
| protected void flushAndUpdate(RowImpl row) |
| throws SQLException { |
| Column[] autoAssign = getAutoAssignColumns(row); |
| String[] autoAssignColNames = getAutoAssignColNames(autoAssign, row); |
| |
| // prepare statement |
| String sql = row.getSQL(_dict); |
| PreparedStatement stmnt = prepareStatement(sql, autoAssignColNames); |
| |
| // setup parameters and execute statement |
| if (stmnt != null) |
| row.flush(stmnt, _dict, _store); |
| try { |
| int count = executeUpdate(stmnt, sql, row); |
| if (count != 1) { |
| logSQLWarnings(stmnt); |
| Object failed = row.getFailedObject(); |
| if (failed != null) |
| _exceptions.add(new OptimisticException(failed)); |
| else if (row.getAction() == Row.ACTION_INSERT) |
| throw new SQLException(_loc.get( |
| "update-failed-no-failed-obj", String.valueOf(count), |
| sql).getMessage()); |
| } |
| if (autoAssignColNames != null) |
| populateAutoAssignCols(stmnt, autoAssign, autoAssignColNames, |
| row); |
| else { |
| StateManagerImpl sm = (StateManagerImpl)row.getPrimaryKey(); |
| if (sm != null) { |
| ClassMapping meta = (ClassMapping)sm.getMetaData(); |
| if (hasGeneratedKey(meta)) { |
| sm.setObjectId(ApplicationIds.create( |
| sm.getPersistenceCapable(), meta)); |
| } |
| } |
| } |
| } catch (SQLException se) { |
| throw SQLExceptions.getStore(se, row.getFailedObject(), _dict); |
| } finally { |
| if (stmnt != null) { |
| try { |
| stmnt.close(); |
| } catch (SQLException se) { |
| } |
| } |
| } |
| } |
| |
| private boolean hasGeneratedKey(ClassMapping meta) { |
| FieldMapping[] pks = meta.getPrimaryKeyFieldMappings(); |
| for (FieldMapping pk : pks) { |
| ClassMapping pkMeta = pk.getTypeMapping(); |
| if (pkMeta != null) { |
| return hasGeneratedKey(pkMeta); |
| } |
| else if (pk.getValueStrategy() == ValueStrategies.AUTOASSIGN) |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * This method will only be called when there is auto assign columns. |
| * If database supports getGeneratedKeys, the keys will be obtained |
| * from the result set associated with the stmnt. If not, a separate |
| * sql to select the key will be issued from DBDictionary. |
| */ |
| protected List<Object> populateAutoAssignCols(PreparedStatement stmnt, |
| Column[] autoAssign, DBIdentifier[] autoAssignColNames, RowImpl row) |
| throws SQLException { |
| List<Object> vals = null; |
| if (_dict.supportsGetGeneratedKeys) { |
| // set auto assign values to id col |
| vals = getGeneratedKeys(stmnt, autoAssignColNames); |
| } |
| setObjectId(vals, autoAssign, autoAssignColNames, row); |
| return vals; |
| } |
| |
| protected List<Object> populateAutoAssignCols(PreparedStatement stmnt, |
| Column[] autoAssign, String[] autoAssignColNames, RowImpl row) |
| throws SQLException { |
| return populateAutoAssignCols(stmnt, autoAssign, |
| DBIdentifier.toArray(autoAssignColNames, DBIdentifierType.COLUMN), row); |
| } |
| |
| protected void setObjectId(List vals, Column[] autoAssign, |
| String[] autoAssignColNames, RowImpl row) |
| throws SQLException{ |
| setObjectId(vals, autoAssign, DBIdentifier.toArray(autoAssignColNames, DBIdentifierType.COLUMN), row); |
| } |
| |
| protected void setObjectId(List vals, Column[] autoAssign, |
| DBIdentifier[] autoAssignColNames, RowImpl row) |
| throws SQLException{ |
| OpenJPAStateManager sm = row.getPrimaryKey(); |
| ClassMapping mapping = (ClassMapping) sm.getMetaData(); |
| Object val = null; |
| for (int i = 0; i < autoAssign.length; i++) { |
| if (_dict.supportsGetGeneratedKeys && vals != null && |
| vals.size() > 0) |
| val = vals.get(i); |
| else |
| val = _dict.getGeneratedKey(autoAssign[i], _conn); |
| mapping.assertJoinable(autoAssign[i]).setAutoAssignedValue(sm, |
| _store, autoAssign[i], val); |
| } |
| sm.setObjectId( |
| ApplicationIds.create(sm.getPersistenceCapable(), mapping)); |
| } |
| |
| /** |
| * This method will only be called when the database supports |
| * getGeneratedKeys. |
| */ |
| protected List<Object> getGeneratedKeys(PreparedStatement stmnt, |
| String[] autoAssignColNames) |
| throws SQLException { |
| return getGeneratedKeys(stmnt, DBIdentifier.toArray(autoAssignColNames, DBIdentifierType.COLUMN)); |
| } |
| |
| protected List<Object> getGeneratedKeys(PreparedStatement stmnt, |
| DBIdentifier[] autoAssignColNames) |
| throws SQLException { |
| ResultSet rs = stmnt.getGeneratedKeys(); |
| List<Object> vals = new ArrayList<>(); |
| while (rs.next()) { |
| for (int i = 0; i < autoAssignColNames.length; i++) |
| vals.add(rs.getObject(i + 1)); |
| } |
| rs.close(); |
| return vals; |
| } |
| |
| protected Column[] getAutoAssignColumns(RowImpl row) { |
| Column[] autoAssign = null; |
| if (row.getAction() == Row.ACTION_INSERT) |
| autoAssign = row.getTable().getAutoAssignedColumns(); |
| return autoAssign; |
| } |
| |
| protected String[] getAutoAssignColNames(Column[] autoAssign, RowImpl row) { |
| String[] autoAssignColNames = null; |
| if (autoAssign != null && autoAssign.length > 0 |
| && row.getPrimaryKey() != null) { |
| autoAssignColNames = new String[autoAssign.length]; |
| for (int i = 0; i < autoAssign.length; i++) |
| autoAssignColNames[i] = |
| _dict.convertSchemaCase(autoAssign[i].getIdentifier()); |
| } |
| return autoAssignColNames; |
| } |
| |
| @Override |
| public void flush() { |
| } |
| |
| /** |
| * This method is to provide override for non-JDBC or JDBC-like |
| * implementation of executing update. |
| */ |
| protected int executeUpdate(PreparedStatement stmnt, String sql, |
| RowImpl row) throws SQLException { |
| return stmnt.executeUpdate(); |
| } |
| |
| /** |
| * This method is to provide override for non-JDBC or JDBC-like |
| * implementation of preparing statement. |
| */ |
| protected PreparedStatement prepareStatement(String sql) |
| throws SQLException { |
| return prepareStatement(sql, null); |
| } |
| /** |
| * This method is to provide override for non-JDBC or JDBC-like |
| * implementation of preparing statement. |
| */ |
| protected PreparedStatement prepareStatement(String sql, |
| String[] autoAssignColNames) |
| throws SQLException { |
| // pass in AutoAssignColumn names |
| if (autoAssignColNames != null && _dict.supportsGetGeneratedKeys) |
| return _conn.prepareStatement(sql, autoAssignColNames); |
| else |
| return _conn.prepareStatement(sql); |
| } |
| |
| /** |
| * Provided the JDBC log category is logging warnings, this method will |
| * log any SQL warnings that result from the execution of a SQL statement. |
| */ |
| protected void logSQLWarnings(PreparedStatement stmt) { |
| logSQLWarnings((Statement)stmt); |
| } |
| |
| protected void logSQLWarnings(Statement stmt) { |
| if (stmt != null && _log != null && _log.isTraceEnabled()) { |
| try { |
| SQLWarning warn = stmt.getWarnings(); |
| while (warn != null) { |
| _log.trace(_loc.get("sql-warning", warn.getMessage())); |
| warn = warn.getNextWarning(); |
| } |
| } catch (SQLException e) {} |
| } |
| } |
| } |