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JDBC Driver for the Firebird RDBMS
/*
* Firebird Open Source J2EE Connector - JDBC Driver
*
* Distributable under LGPL license.
* You may obtain a copy of the License at http://www.gnu.org/copyleft/lgpl.html
*
* This program 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
* LGPL License for more details.
*
* This file was created by members of the firebird development team.
* All individual contributions remain the Copyright (C) of those
* individuals. Contributors to this file are either listed here or
* can be obtained from a CVS history command.
*
* All rights reserved.
*/
package org.firebirdsql.management;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Iterator;
import org.firebirdsql.gds.GDS;
import org.firebirdsql.gds.ISCConstants;
import org.firebirdsql.gds.ServiceRequestBuffer;
import org.firebirdsql.gds.impl.GDSType;
import org.firebirdsql.jdbc.FBSQLException;
/**
* Implements the backup and restore functionality of Firebird Services API.
*
* @author Roman Rokytskyy
*
*/
public class FBBackupManager extends FBServiceManager implements BackupManager {
/**
* Structure that holds path to the database and corresponding size of the
* file (in case of backup - that is size of the file in megabytes, in case
* of restore - size of the database file in pages).
*/
private static class PathSizeStruct {
private int size;
private String path;
private PathSizeStruct(String path, int size) {
this.path = path;
this.size = size;
}
public String getPath() {
return path;
}
public int getSize() {
return size;
}
public boolean equals(Object obj) {
if (obj == this) return true;
if (!(obj instanceof PathSizeStruct)) return false;
PathSizeStruct that = (PathSizeStruct)obj;
return this.path.equals(that.path);
}
public int hashCode() {
return path.hashCode();
}
public String toString() {
return path + " " + size;
}
}
private boolean noLimitBackup = false;
private ArrayList backupPaths = new ArrayList();
private boolean noLimitRestore = false;
private ArrayList restorePaths = new ArrayList();
private boolean verbose;
private int restoreBufferCount;
private int restorePageSize;
private boolean restoreReadOnly;
private boolean restoreReplace;
private static final int RESTORE_REPLACE = ISCConstants.isc_spb_res_replace;
private static final int RESTORE_CREATE = ISCConstants.isc_spb_res_create;
/**
* Create a new instance of FBBackupManager based on
* the default GDSType.
*/
public FBBackupManager()
{
super();
init();
}
/**
* Create a new instance of FBBackupManager based on
* a given GDSType.
*
* @param gdsType type must be PURE_JAVA, EMBEDDED, or NATIVE
*/
public FBBackupManager(String gdsType)
{
super(gdsType);
init();
}
/**
* Create a new instance of FBBackupManager based on
* a given GDSType.
*
* @param gdsType type must be PURE_JAVA, EMBEDDED, or NATIVE
*/
public FBBackupManager(GDSType gdsType) {
super(gdsType);
init();
}
/**
* Initialize necessary parameters.
*/
private void init() {
verbose = false;
restoreBufferCount = -1;
restorePageSize = -1;
restoreReadOnly = false;
restoreReplace = false;
}
/**
* @see org.firebirdsql.management.BackupManager#setBackupPath(java.lang.String)
*/
public void setBackupPath(String backupPath) {
addBackupPath(backupPath, -1);
noLimitBackup = true;
}
public void addBackupPath(String path) {
addBackupPath(path, -1);
}
public void addBackupPath(String path, int size) {
if (noLimitBackup)
throw new IllegalArgumentException(
"You cannot use setBackupPath(String) and " +
"addBackupPath(String, int) methods simultaneously.");
backupPaths.add(new PathSizeStruct(path, size));
}
public void clearBackupPaths() {
backupPaths.clear();
noLimitBackup = false;
}
/* (non-Javadoc)
* @see org.firebirdsql.management.ServiceManager#setDatabase(java.lang.String)
*/
public void setDatabase(String database) {
super.setDatabase(database);
addRestorePath(database, -1);
noLimitRestore = true;
}
public void addRestorePath(String path, int size) {
if (noLimitRestore)
throw new IllegalArgumentException(
"You cannot use setDatabase(String) and " +
"addRestorePath(String, int) methods simultaneously.");
restorePaths.add(new PathSizeStruct(path, size));
}
public void clearRestorePaths() {
restorePaths.clear();
noLimitRestore = false;
}
/**
* @see org.firebirdsql.management.BackupManager#backupDatabase()
*/
public void backupDatabase() throws SQLException {
backupDatabase(0);
}
/**
* @see org.firebirdsql.management.BackupManager#backupMetadata()
*/
public void backupMetadata() throws SQLException {
backupDatabase(BACKUP_METADATA_ONLY);
}
/**
* @see org.firebirdsql.management.BackupManager#backupDatabase(int)
*/
public void backupDatabase(int options ) throws SQLException {
executeServicesOperation(getBackupSRB(options));
}
/**
* Creates and returns the "backup" service request buffer for the Service
* Manager.
*
* @param options The isc_spb_bkp_* parameters options to be used
* @return the "backup" service request buffer for the Service Manager.
*/
private ServiceRequestBuffer getBackupSRB(int options) throws SQLException {
ServiceRequestBuffer backupSPB = getGds().createServiceRequestBuffer(
ISCConstants.isc_action_svc_backup);
backupSPB.addArgument(ISCConstants.isc_spb_dbname, getDatabase());
for (Iterator iter = backupPaths.iterator(); iter.hasNext();) {
PathSizeStruct pathSize = (PathSizeStruct) iter.next();
backupSPB.addArgument(ISCConstants.isc_spb_bkp_file, pathSize.getPath());
if (iter.hasNext() && pathSize.getSize() == -1)
throw new FBSQLException("No size specified for a backup file " +
pathSize.getPath());
if (iter.hasNext())
backupSPB.addArgument(ISCConstants.isc_spb_bkp_length, pathSize.size);
}
if (verbose)
backupSPB.addArgument(ISCConstants.isc_spb_verbose);
backupSPB.addArgument(ISCConstants.isc_spb_options, options);
return backupSPB;
}
/**
* @see org.firebirdsql.management.BackupManager#restoreDatabase()
*/
public void restoreDatabase() throws SQLException {
restoreDatabase(0);
}
/**
* @see org.firebirdsql.management.BackupManager#restoreDatabase(int)
*/
public void restoreDatabase(int options) throws SQLException {
executeServicesOperation(getRestoreSRB(options));
}
/**
* Set whether the operations of this BackupManager will
* result in verbose logging to the configured logger.
*
* @param verbose If true, operations will be logged
* verbosely, otherwise they will not be logged verbosely
*/
public void setVerbose(boolean verbose) {
this.verbose = verbose;
}
/**
* Set the default number of pages to be buffered (cached) by default in a
* restored database.
*
* @param bufferCount The page-buffer size to be used, a positive value
*/
public void setRestorePageBufferCount(int bufferCount) {
if (bufferCount < 0){
throw new IllegalArgumentException("Buffer count must be positive");
}
this.restoreBufferCount = bufferCount;
}
/**
* Set the page size that will be used for a restored database. The value
* for pageSize must be one of: 1024, 2048, 4096, 8192 or 16384. The
* default value depends on the Firebird version.
*
* @param pageSize The page size to be used in a restored database,
* one of 1024, 2048, 4196, 8192 or 16384
*/
public void setRestorePageSize(int pageSize) {
if (pageSize != 1024 && pageSize != 2048
&& pageSize != 4096 && pageSize != 8192 && pageSize != 16384){
throw new IllegalArgumentException(
"Page size must be one of 1024, 2048, 4096, 8192 or 16384");
}
this.restorePageSize = pageSize;
}
/**
* Set the restore operation to create a new database, as opposed to
* overwriting an existing database. This is true by default.
*
* @param replace If true, the restore operation will attempt
* to create a new database, otherwise the restore operation will
* overwrite an existing database
*/
public void setRestoreReplace(boolean replace) {
this.restoreReplace = replace;
}
/**
* Set the read-only attribute on a restored database.
*
* @param readOnly If true, a restored database will be
* read-only, otherwise it will be read-write.
*/
public void setRestoreReadOnly(boolean readOnly) {
this.restoreReadOnly = readOnly;
}
/**
* Creates and returns the "backup" service request buffer for the Service
* Manager.
*
* @param options THe options to be used for the backup operation
* @return the "backup" service request buffer for the Service Manager.
*/
private ServiceRequestBuffer getRestoreSRB(int options) {
GDS gds = getGds();
ServiceRequestBuffer restoreSPB = gds
.createServiceRequestBuffer(ISCConstants.isc_action_svc_restore);
// backup files without sizes
for (Iterator iter = backupPaths.iterator(); iter.hasNext();) {
PathSizeStruct pathSize = (PathSizeStruct) iter.next();
restoreSPB.addArgument(ISCConstants.isc_spb_bkp_file, pathSize.getPath());
}
// restore files with sizes except the last one
for (Iterator iter = restorePaths.iterator(); iter.hasNext();) {
PathSizeStruct pathSize = (PathSizeStruct) iter.next();
restoreSPB.addArgument(ISCConstants.isc_spb_dbname, pathSize.getPath());
if (iter.hasNext() && pathSize.getSize() != -1)
restoreSPB.addArgument(ISCConstants.isc_spb_res_length, pathSize.getSize());
}
if (restoreBufferCount != -1)
restoreSPB.addArgument(ISCConstants.isc_spb_res_buffers,
restoreBufferCount);
if (restorePageSize != -1)
restoreSPB.addArgument(ISCConstants.isc_spb_res_page_size,
restorePageSize);
restoreSPB.addArgument(ISCConstants.isc_spb_res_access_mode,
((byte)(restoreReadOnly
? ISCConstants.isc_spb_res_am_readonly
: ISCConstants.isc_spb_res_am_readwrite)));
if (verbose)
restoreSPB.addArgument(ISCConstants.isc_spb_verbose);
if ((options & RESTORE_CREATE) != RESTORE_CREATE
&& (options & RESTORE_REPLACE) != RESTORE_REPLACE){
options |= restoreReplace ? RESTORE_REPLACE : RESTORE_CREATE;
}
restoreSPB.addArgument(ISCConstants.isc_spb_options, options);
return restoreSPB;
}
}
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