001/*
002 * This library is part of OpenCms -
003 * the Open Source Content Management System
004 *
005 * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
006 *
007 * This library is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * This library is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * For further information about Alkacon Software GmbH & Co. KG, please see the
018 * company website: http://www.alkacon.com
019 *
020 * For further information about OpenCms, please see the
021 * project website: http://www.opencms.org
022 *
023 * You should have received a copy of the GNU Lesser General Public
024 * License along with this library; if not, write to the Free Software
025 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
026 */
027
028package org.opencms.setup.db.update6to7;
029
030import org.opencms.setup.CmsSetupDBWrapper;
031import org.opencms.setup.CmsSetupDb;
032import org.opencms.setup.db.A_CmsUpdateDBPart;
033
034import java.io.IOException;
035import java.sql.SQLException;
036import java.util.ArrayList;
037import java.util.HashMap;
038import java.util.Iterator;
039import java.util.List;
040import java.util.Map;
041
042/**
043 * This class creates all the indexes that are used in the database version 7.<p>
044 *
045 * @since 7.0.0
046 */
047public class CmsUpdateDBCreateIndexes7 extends A_CmsUpdateDBPart {
048
049    /** Constant for the sql query to read the indexes.<p> */
050    protected static final String QUERY_SHOW_INDEX = "QUERY_SHOW_INDEX";
051
052    /** Constant for the replacement of the tablename in the sql query.<p> */
053    protected static final String REPLACEMENT_TABLENAME = "${tablename}";
054
055    /** Constant for the field of the index name.<p> */
056    private static final String FIELD_INDEX = "KEY_NAME";
057
058    /** Constant for the primary key.<p> */
059    private static final String PRIMARY_KEY = "PRIMARY";
060
061    /** Constant for the SQL query properties.<p> */
062    private static final String QUERY_PROPERTY_FILE = "cms_add_new_indexes_queries.properties";
063
064    /** Constant for the replacement of the indexes to drop.<p> */
065    private static final String REPLACEMENT_INDEXES = "${dropindexes}";
066
067    /**
068     * Constructor.<p>
069     *
070     * @throws IOException if the query properties cannot be read
071     */
072    public CmsUpdateDBCreateIndexes7()
073    throws IOException {
074
075        super();
076        loadQueryProperties(getPropertyFileLocation() + QUERY_PROPERTY_FILE);
077    }
078
079    /**
080     * @see org.opencms.setup.db.A_CmsUpdateDBPart#internalExecute(org.opencms.setup.CmsSetupDb)
081     */
082    @Override
083    protected void internalExecute(CmsSetupDb dbCon) {
084
085        System.out.println(new Exception().getStackTrace()[0].toString());
086        List<String> elements = new ArrayList<String>();
087        elements.add("CMS_CONTENTS");
088        elements.add("CMS_GROUPS");
089        elements.add("CMS_GROUPUSERS");
090        elements.add("CMS_OFFLINE_ACCESSCONTROL");
091        elements.add("CMS_OFFLINE_CONTENTS");
092        elements.add("CMS_OFFLINE_PROPERTIES");
093        elements.add("CMS_OFFLINE_PROPERTYDEF");
094        elements.add("CMS_OFFLINE_RESOURCES");
095        elements.add("CMS_OFFLINE_STRUCTURE");
096        elements.add("CMS_ONLINE_ACCESSCONTROL");
097        elements.add("CMS_ONLINE_PROPERTIES");
098        elements.add("CMS_ONLINE_PROPERTYDEF");
099        elements.add("CMS_ONLINE_RESOURCES");
100        elements.add("CMS_ONLINE_STRUCTURE");
101        elements.add("CMS_PROJECTRESOURCES");
102        elements.add("CMS_PROJECTS");
103        elements.add("CMS_PUBLISH_HISTORY");
104        elements.add("CMS_STATICEXPORT_LINKS");
105        elements.add("CMS_USERS");
106
107        // iterate the queries
108        for (Iterator<String> it = elements.iterator(); it.hasNext();) {
109            String query = it.next();
110            // Check if the table exists
111            if (dbCon.hasTableOrColumn(query, null)) {
112                HashMap<String, String> replacer = new HashMap<String, String>();
113                replacer.put(REPLACEMENT_INDEXES, getIndexesToDrop(dbCon, query));
114                try {
115                    dbCon.updateSqlStatement(readQuery(query), replacer, null);
116                } catch (SQLException e) {
117                    e.printStackTrace();
118                }
119            } else {
120                System.out.println("Table " + query + "does not exist.");
121            }
122        }
123    }
124
125    /**
126     * Returns the string of the indexes that shall be dropped before adding the final new indexes.<p>
127     *
128     * @param dbCon the connection to the database
129     * @param tablename the table to drop the indexes from
130     *
131     * @return the string to drop the temporary indexes
132     */
133    private String getIndexesToDrop(CmsSetupDb dbCon, String tablename) {
134
135        List<String> indexes = new ArrayList<String>();
136        String tableIndex = readQuery(QUERY_SHOW_INDEX);
137        Map<String, String> replacer = new HashMap<String, String>();
138        replacer.put(REPLACEMENT_TABLENAME, tablename);
139        CmsSetupDBWrapper db = null;
140        try {
141            db = dbCon.executeSqlStatement(tableIndex, replacer);
142            while (db.getResultSet().next()) {
143                String index = db.getResultSet().getString(FIELD_INDEX);
144                if (!indexes.contains(index)) {
145                    indexes.add(index);
146                }
147            }
148
149        } catch (SQLException e) {
150            e.printStackTrace();
151        } finally {
152            if (db != null) {
153                db.close();
154            }
155        }
156
157        StringBuffer dropIndex = new StringBuffer();
158        for (Iterator<String> it = indexes.iterator(); it.hasNext();) {
159            String index = it.next();
160            if (index.equals(PRIMARY_KEY)) {
161                dropIndex.append("DROP PRIMARY KEY, ");
162            } else {
163                dropIndex.append("DROP INDEX ");
164                dropIndex.append(index);
165                dropIndex.append(", ");
166            }
167        }
168        return dropIndex.toString();
169    }
170
171}