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package edu.ucsb.nceas.metacat.admin.upgrade;
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/**
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* '$RCSfile$'
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* Purpose: A Class for upgrading the database to version 1.5
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* Copyright: 2000 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* Authors: Saurabh Garg
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*
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* '$Author$'
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* '$Date$'
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* '$Revision$'
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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import java.io.File;
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import java.io.FileFilter;
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import java.sql.Connection;
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import java.sql.Driver;
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import java.sql.DriverManager;
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import java.sql.PreparedStatement;
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import java.sql.SQLException;
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import java.util.ArrayList;
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import java.util.List;
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import org.apache.commons.io.filefilter.EmptyFileFilter;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import edu.ucsb.nceas.metacat.admin.AdminException;
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import edu.ucsb.nceas.metacat.properties.PropertyService;
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import edu.ucsb.nceas.metacat.util.DocumentUtil;
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import edu.ucsb.nceas.utilities.PropertyNotFoundException;
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import edu.ucsb.nceas.utilities.SortedProperties;
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public class UpgradeEmptyReplicatedDataFile implements UpgradeUtilityInterface {
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protected static Log log = LogFactory.getLog(UpgradeEmptyReplicatedDataFile.class);
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private String driver = null;
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private String url = null;
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private String user = null;
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private String password = null;
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public boolean upgrade() throws AdminException {
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boolean success = true;
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Connection sqlca = null;
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PreparedStatement pstmt = null;
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// look up the empty files from the file system
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File dataDir = null;
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try {
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dataDir = new File(PropertyService.getProperty("application.datafilepath"));
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} catch (PropertyNotFoundException e) {
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e.printStackTrace();
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return false;
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}
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File[] emptyFiles = dataDir.listFiles((FileFilter) EmptyFileFilter.EMPTY);
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if (emptyFiles.length == 0) {
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log.info("No empty data files found");
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return true;
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}
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// track the ones we end up deleting from the DB
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List<File> processedFiles = new ArrayList<File>();
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try {
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// get the properties
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driver = PropertyService.getProperty("database.driver");
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url = PropertyService.getProperty("database.connectionURI");
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user = PropertyService.getProperty("database.user");
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password = PropertyService.getProperty("database.password");
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// Create a JDBC connection to the database
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Driver d = (Driver) Class.forName(driver).newInstance();
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DriverManager.registerDriver(d);
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sqlca = DriverManager.getConnection(url, user, password);
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sqlca.setAutoCommit(false);
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for (File emptyFile: emptyFiles) {
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int count = 0;
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// delete each empty file from the tables
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String emptyDocid = emptyFile.getName();
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String docid = DocumentUtil.getDocIdFromString(emptyDocid);
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String rev = DocumentUtil.getRevisionStringFromString(emptyDocid);
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// xml_documents
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pstmt = sqlca.prepareStatement("DELETE FROM xml_documents WHERE docid = ? and server_location != '1'");
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pstmt.setString(1, docid);
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count = pstmt.executeUpdate();
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// xml_revisions
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pstmt = sqlca.prepareStatement("DELETE FROM xml_revisions WHERE docid = ? and server_location != '1'");
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pstmt.setString(1, docid);
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count = count + pstmt.executeUpdate();
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// if we did remove it from the the DB
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if (count > 0) {
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processedFiles.add(emptyFile);
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}
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}
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// all or nothing
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sqlca.commit();
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} catch (Exception e) {
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try {
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// rollback if there was even a single error
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sqlca.rollback();
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} catch (SQLException e1) {
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// TODO Auto-generated catch block
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e1.printStackTrace();
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}
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success = false;
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} finally {
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// clean up
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if (sqlca != null) {
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try {
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sqlca.close();
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} catch (SQLException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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}
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}
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// now delete the actual files that were removed from the db
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if (success) {
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for (File emptyFile: processedFiles) {
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log.info("Deleting empty replicated data file from filesystem: " + emptyFile.getAbsolutePath());
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emptyFile.delete();
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}
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}
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return success;
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}
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public static void main(String [] ags){
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try {
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// set up the properties based on the test/deployed configuration of the workspace
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SortedProperties testProperties =
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new SortedProperties("test/test.properties");
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testProperties.load();
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String metacatContextDir = testProperties.getProperty("metacat.contextDir");
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PropertyService.getInstance(metacatContextDir + "/WEB-INF");
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// now run it
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UpgradeEmptyReplicatedDataFile upgrader = new UpgradeEmptyReplicatedDataFile();
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upgrader.upgrade();
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} catch (Exception ex) {
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System.out.println("Exception:" + ex.getMessage());
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ex.printStackTrace();
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}
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}
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}
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