/jboss-as-7.1.1.Final/cmp/src/main/java/org/jboss/as/cmp/jdbc/JDBCStoreEntityCommand.java
Java | 156 lines | 94 code | 15 blank | 47 comment | 16 complexity | ec2b75c760ed70075010ac8e9b15aca2 MD5 | raw file
Possible License(s): LGPL-2.1, Apache-2.0
- /*
- * JBoss, Home of Professional Open Source.
- * Copyright 2011, Red Hat, Inc., and individual contributors
- * as indicated by the @author tags. See the copyright.txt file in the
- * distribution for a full listing of individual contributors.
- *
- * This is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as
- * published by the Free Software Foundation; either version 2.1 of
- * the License, or (at your option) any later version.
- *
- * This software 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this software; if not, write to the Free
- * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
- */
- package org.jboss.as.cmp.jdbc;
- import java.sql.Connection;
- import java.sql.PreparedStatement;
- import javax.ejb.EJBException;
- import org.jboss.as.cmp.CmpMessages;
- import org.jboss.as.cmp.context.CmpEntityBeanContext;
- import org.jboss.as.cmp.jdbc.bridge.JDBCCMPFieldBridge;
- import org.jboss.as.cmp.jdbc.bridge.JDBCEntityBridge;
- import org.jboss.as.cmp.jdbc.bridge.JDBCFieldBridge;
- import org.jboss.logging.Logger;
- /**
- * JDBCStoreEntityCommand updates the row with the new state.
- * In the event that no field is dirty the command just returns.
- * Note: read-only fields are never considered dirty.
- *
- * @author <a href="mailto:dain@daingroup.com">Dain Sundstrom</a>
- * @author <a href="mailto:rickard.oberg@telkel.com">Rickard Oberg</a>
- * @author <a href="mailto:marc.fleury@telkel.com">Marc Fleury</a>
- * @author <a href="mailto:shevlandj@kpi.com.au">Joe Shevland</a>
- * @author <a href="mailto:justin@j-m-f.demon.co.uk">Justin Forder</a>
- * @author <a href="mailto:sebastien.alborini@m4x.org">Sebastien Alborini</a>
- * @author <a href="mailto:alex@jboss.org">Alex Loubyansky</a>
- * @version $Revision: 81030 $
- */
- public final class JDBCStoreEntityCommand {
- private final JDBCEntityBridge entity;
- private final JDBCFieldBridge[] primaryKeyFields;
- private final Logger log;
- public JDBCStoreEntityCommand(JDBCStoreManager manager) {
- entity = (JDBCEntityBridge) manager.getEntityBridge();
- primaryKeyFields = entity.getPrimaryKeyFields();
- // Create the Log
- log = Logger.getLogger(
- this.getClass().getName() +
- "." +
- manager.getMetaData().getName());
- }
- public void execute(CmpEntityBeanContext ctx) {
- // scheduled for batch cascade-delete instance should not be updated
- // because foreign key fields could be updated to null and cascade-delete will fail.
- JDBCEntityBridge.FieldIterator dirtyIterator = entity.getDirtyIterator(ctx);
- if (!dirtyIterator.hasNext() || entity.isBeingRemoved(ctx) || entity.isScheduledForBatchCascadeDelete(ctx)) {
- if (log.isTraceEnabled()) {
- log.trace("Store command NOT executed. Entity is not dirty "
- + ", is being removed or scheduled for *batch* cascade delete: pk=" + ctx.getPrimaryKey());
- }
- return;
- }
- // generate sql
- StringBuffer sql = new StringBuffer(200);
- sql.append(SQLUtil.UPDATE)
- .append(entity.getQualifiedTableName())
- .append(SQLUtil.SET);
- SQLUtil.getSetClause(dirtyIterator, sql)
- .append(SQLUtil.WHERE);
- SQLUtil.getWhereClause(primaryKeyFields, sql);
- boolean hasLockedFields = entity.hasLockedFields(ctx);
- JDBCEntityBridge.FieldIterator lockedIterator = null;
- if (hasLockedFields) {
- lockedIterator = entity.getLockedIterator(ctx);
- while (lockedIterator.hasNext()) {
- sql.append(SQLUtil.AND);
- JDBCCMPFieldBridge field = lockedIterator.next();
- if (field.getLockedValue(ctx) == null) {
- SQLUtil.getIsNullClause(false, field, "", sql);
- lockedIterator.remove();
- } else {
- SQLUtil.getWhereClause(field, sql);
- }
- }
- }
- Connection con = null;
- PreparedStatement ps = null;
- int rowsAffected = 0;
- try {
- // create the statement
- if (log.isDebugEnabled()) {
- log.debug("Executing SQL: " + sql);
- }
- // get the connection
- con = entity.getDataSource().getConnection();
- ps = con.prepareStatement(sql.toString());
- // SET: set the dirty fields parameters
- int index = 1;
- dirtyIterator.reset();
- while (dirtyIterator.hasNext()) {
- index = dirtyIterator.next().setInstanceParameters(ps, index, ctx);
- }
- // WHERE: set primary key fields
- index = entity.setPrimaryKeyParameters(ps, index, ctx.getPrimaryKey());
- // WHERE: set optimistically locked field values
- if (hasLockedFields) {
- lockedIterator.reset();
- while (lockedIterator.hasNext()) {
- JDBCCMPFieldBridge field = lockedIterator.next();
- Object value = field.getLockedValue(ctx);
- index = field.setArgumentParameters(ps, index, value);
- }
- }
- // execute statement
- rowsAffected = ps.executeUpdate();
- } catch (EJBException e) {
- throw e;
- } catch (Exception e) {
- throw CmpMessages.MESSAGES.storeFailed(e);
- } finally {
- JDBCUtil.safeClose(ps);
- JDBCUtil.safeClose(con);
- }
- // check results
- if (rowsAffected != 1) {
- throw CmpMessages.MESSAGES.updateFailedTooManyRowsAffected(rowsAffected, ctx.getPrimaryKey());
- }
- // Mark the updated fields as clean.
- dirtyIterator.reset();
- while (dirtyIterator.hasNext()) {
- dirtyIterator.next().setClean(ctx);
- }
- }
- }