| /* |
| * Copyright 1999-2004 The Apache Software Foundation. |
| * |
| * Licensed 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.cocoon.acting; |
| |
| import org.apache.avalon.excalibur.datasource.DataSourceComponent; |
| import org.apache.avalon.framework.configuration.Configuration; |
| import org.apache.avalon.framework.configuration.ConfigurationException; |
| import org.apache.avalon.framework.parameters.Parameters; |
| import org.apache.avalon.framework.thread.ThreadSafe; |
| import org.apache.cocoon.Constants; |
| import org.apache.cocoon.ProcessingException; |
| import org.apache.cocoon.environment.ObjectModelHelper; |
| import org.apache.cocoon.environment.Redirector; |
| import org.apache.cocoon.environment.Request; |
| import org.apache.cocoon.environment.SourceResolver; |
| |
| import java.sql.Connection; |
| import java.sql.PreparedStatement; |
| import java.sql.SQLException; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * Update a record in a database. This Action assumes that there is |
| * only one table at a time to update. |
| * |
| * @author <a href="mailto:bloritsch@apache.org">Berin Loritsch</a> |
| * @version CVS $Id: DatabaseUpdateAction.java,v 1.2 2004/03/05 13:01:50 bdelacretaz Exp $ |
| */ |
| public class DatabaseUpdateAction extends AbstractDatabaseAction implements ThreadSafe { |
| private static final Map updateStatements = new HashMap(); |
| |
| /** |
| * Update a record in the database. This action assumes that |
| * the file referenced by the "descriptor" parameter conforms |
| * to the AbstractDatabaseAction specifications. |
| */ |
| public Map act(Redirector redirector, SourceResolver resolver, Map objectModel, String source, Parameters param) throws Exception { |
| DataSourceComponent datasource = null; |
| Connection conn = null; |
| int currentIndex = 0; |
| |
| // read global parameter settings |
| boolean reloadable = Constants.DESCRIPTOR_RELOADABLE_DEFAULT; |
| if (this.settings.containsKey("reloadable")) |
| reloadable = Boolean.valueOf((String) this.settings.get("reloadable")).booleanValue(); |
| // read local parameter settings |
| try { |
| Configuration conf = |
| this.getConfiguration(param.getParameter("descriptor", (String) this.settings.get("descriptor")), resolver, |
| param.getParameterAsBoolean("reloadable",reloadable)); |
| |
| String query = this.getUpdateQuery(conf); |
| datasource = this.getDataSource(conf); |
| conn = datasource.getConnection(); |
| Request request = ObjectModelHelper.getRequest(objectModel); |
| |
| if (conn.getAutoCommit()) { |
| conn.setAutoCommit(false); |
| } |
| |
| PreparedStatement statement = conn.prepareStatement(query); |
| |
| Configuration[] keys = conf.getChild("table").getChild("keys").getChildren("key"); |
| Configuration[] values = conf.getChild("table").getChild("values").getChildren("value"); |
| currentIndex = 1; |
| |
| for (int i = 0; i < values.length; i++, currentIndex++) { |
| this.setColumn(statement, currentIndex, request, values[i]); |
| } |
| |
| for (int i = 0; i < keys.length; i++, currentIndex++) { |
| this.setColumn(statement, currentIndex, request, keys[i]); |
| } |
| |
| int rows = statement.executeUpdate(); |
| conn.commit(); |
| statement.close(); |
| |
| if(rows > 0){ |
| request.setAttribute("rows", Integer.toString(rows)); |
| return EMPTY_MAP; |
| } |
| } catch (Exception e) { |
| if (conn != null) { |
| conn.rollback(); |
| } |
| |
| throw new ProcessingException("Could not update record :position = " + currentIndex, e); |
| } finally { |
| if (conn != null) { |
| try { |
| conn.close(); |
| } catch (SQLException sqe) { |
| getLogger().warn("There was an error closing the datasource", sqe); |
| } |
| } |
| |
| if (datasource != null) this.dbselector.release(datasource); |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Get the String representation of the PreparedStatement. This is |
| * mapped to the Configuration object itself, so if it doesn't exist, |
| * it will be created. |
| */ |
| protected String getUpdateQuery(Configuration conf) throws ConfigurationException { |
| String query = null; |
| |
| synchronized (DatabaseUpdateAction.updateStatements) { |
| query = (String) DatabaseUpdateAction.updateStatements.get(conf); |
| |
| if (query == null) { |
| Configuration table = conf.getChild("table"); |
| Configuration[] keys = table.getChild("keys").getChildren("key"); |
| Configuration[] values = table.getChild("values").getChildren("value"); |
| |
| StringBuffer queryBuffer = new StringBuffer("UPDATE "); |
| queryBuffer.append(table.getAttribute("name")); |
| queryBuffer.append(" SET "); |
| |
| for (int i = 0; i < values.length; i++) { |
| if (i > 0) { |
| queryBuffer.append(", "); |
| } |
| |
| queryBuffer.append(values[i].getAttribute("dbcol")); |
| queryBuffer.append(" = ?"); |
| } |
| |
| queryBuffer.append(" WHERE "); |
| |
| for (int i = 0; i < keys.length; i++) { |
| if (i > 0) { |
| queryBuffer.append(" AND "); |
| } |
| |
| queryBuffer.append(keys[i].getAttribute("dbcol")); |
| queryBuffer.append(" = ?"); |
| } |
| |
| query = queryBuffer.toString(); |
| |
| DatabaseUpdateAction.updateStatements.put(conf, query); |
| } |
| } |
| |
| return query; |
| } |
| } |