//$Id: SchemaUpdate.java 14775 2008-06-18 06:04:17Z anthonyHib $
package org.hibernate.tool.hbm2ddl;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.Writer;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.HibernateException;
import org.hibernate.JDBCException;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.NamingStrategy;
import org.hibernate.cfg.Settings;
import org.hibernate.dialect.Dialect;
import org.hibernate.pretty.DDLFormatter;
import org.hibernate.util.ReflectHelper;
/**
* A commandline tool to update a database schema. May also be called from
* inside an application.
*
* @author Christoph Sturm
*/
public class SchemaUpdate {
private static final Log log = LogFactory.getLog( SchemaUpdate.class );
private ConnectionHelper connectionHelper;
private Configuration configuration;
private Dialect dialect;
private List exceptions;
private boolean haltOnError = false;
private boolean format = true;
private String outputFile = null;
private String delimiter;
public SchemaUpdate(Configuration cfg) throws HibernateException {
this( cfg, cfg.getProperties() );
}
public SchemaUpdate(Configuration cfg, Properties connectionProperties) throws HibernateException {
this.configuration = cfg;
dialect = Dialect.getDialect( connectionProperties );
Properties props = new Properties();
props.putAll( dialect.getDefaultProperties() );
props.putAll( connectionProperties );
connectionHelper = new ManagedProviderConnectionHelper( props );
exceptions = new ArrayList();
}
public SchemaUpdate(Configuration cfg, Settings settings) throws HibernateException {
this.configuration = cfg;
dialect = settings.getDialect();
connectionHelper = new SuppliedConnectionProviderConnectionHelper(
settings.getConnectionProvider()
);
exceptions = new ArrayList();
}
public static void main(String[] args) {
try {
Configuration cfg = new Configuration();
boolean script = true;
// If true then execute db updates, otherwise just generate and display updates
boolean doUpdate = true;
String propFile = null;
for ( int i = 0; i < args.length; i++ ) {
if ( args[i].startsWith( "--" ) ) {
if ( args[i].equals( "--quiet" ) ) {
script = false;
}
else if ( args[i].startsWith( "--properties=" ) ) {
propFile = args[i].substring( 13 );
}
else if ( args[i].startsWith( "--config=" ) ) {
cfg.configure( args[i].substring( 9 ) );
}
else if ( args[i].startsWith( "--text" ) ) {
doUpdate = false;
}
else if ( args[i].startsWith( "--naming=" ) ) {
cfg.setNamingStrategy(
( NamingStrategy ) ReflectHelper.classForName( args[i].substring( 9 ) ).newInstance()
);
}
}
else {
cfg.addFile( args[i] );
}
}
if ( propFile != null ) {
Properties props = new Properties();
props.putAll( cfg.getProperties() );
props.load( new FileInputStream( propFile ) );
cfg.setProperties( props );
}
new SchemaUpdate( cfg ).execute( script, doUpdate );
}
catch ( Exception e ) {
log.error( "Error running schema update", e );
e.printStackTrace();
}
}
/**
* Execute the schema updates
*
* @param script print all DDL to the console
*/
public void execute(boolean script, boolean doUpdate) {
log.info( "Running hbm2ddl schema update" );
Connection connection = null;
Statement stmt = null;
Writer outputFileWriter = null;
exceptions.clear();
try {
DatabaseMetadata meta;
try {
log.info( "fetching database metadata" );
connectionHelper.prepare( true );
connection = connectionHelper.getConnection();
meta = new DatabaseMetadata( connection, dialect );
stmt = connection.createStatement();
}
catch ( SQLException sqle ) {
exceptions.add( sqle );
log.error( "could not get database metadata", sqle );
throw sqle;
}
log.info( "updating schema" );
if ( outputFile != null ) {
log.info( "writing generated schema to file: " + outputFile );
outputFileWriter = new FileWriter( outputFile );
}
String[] createSQL = configuration.generateSchemaUpdateScript( dialect, meta );
for ( int j = 0; j < createSQL.length; j++ ) {
final String sql = createSQL[j];
String formatted = format( sql );
try {
if ( delimiter != null ) {
formatted += delimiter;
}
if ( script ) {
System.out.println( formatted );
}
if ( outputFile != null ) {
outputFileWriter.write( formatted + "\n" );
}
if ( doUpdate ) {
log.debug( sql );
stmt.executeUpdate( formatted );
}
}
catch ( SQLException e ) {
if ( haltOnError ) {
throw new JDBCException( "Error during DDL export", e );
}
exceptions.add( e );
log.error( "Unsuccessful: " + sql );
log.error( e.getMessage() );
}
}
log.info( "schema update complete" );
}
catch ( Exception e ) {
exceptions.add( e );
log.error( "could not complete schema update", e );
}
finally {
try {
if ( stmt != null ) {
stmt.close();
}
connectionHelper.release();
}
catch ( Exception e ) {
exceptions.add( e );
log.error( "Error closing connection", e );
}
try {
if( outputFileWriter != null ) {
outputFileWriter.close();
}
}
catch(Exception e) {
exceptions.add(e);
log.error( "Error closing connection", e );
}
}
}
/**
* Returns a List of all Exceptions which occured during the export.
*
* @return A List containig the Exceptions occured during the export
*/
public List getExceptions() {
return exceptions;
}
public void setHaltOnError(boolean haltOnError) {
this.haltOnError = haltOnError;
}
public void setFormat(boolean format) {
this.format = format;
}
public void setOutputFile(String outputFile) {
this.outputFile = outputFile;
}
public void setDelimiter(String delimiter) {
this.delimiter = delimiter;
}
private String format(String sql) {
return format ?
new DDLFormatter( sql ).format() :
sql;
}
}