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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// 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
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.cmscore.base;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.Enumeration;
import java.util.Vector;
import com.netscape.certsrv.apps.CMS;
import com.netscape.certsrv.base.EBaseException;
import com.netscape.certsrv.base.IConfigStore;
import com.netscape.cmsutil.util.Utils;
/**
* FileConfigStore:
* Extends HashConfigStore with methods to load/save from/to file for
* persistent storage. This is a configuration store agent who
* reads data from a file.
* <P>
* Note that a LdapConfigStore can be implemented so that it reads
* the configuration stores from the Ldap directory.
* <P>
*
* @version $Revision$, $Date$
* @see PropConfigStore
*/
public class FileConfigStore extends PropConfigStore implements
IConfigStore {
private File mFile = null;
/**
* Constructs a file configuration store.
* <P>
*
* @param fileName file name
* @exception EBaseException failed to create file configuration
*/
public FileConfigStore(String fileName) throws EBaseException {
super(null); // top-level store without a name
mFile = new File(fileName);
if (!mFile.exists()) {
throw new EBaseException(CMS.getUserMessage("CMS_BASE_NO_CONFIG_FILE",
mFile.getPath()));
}
load(fileName);
}
/**
* Loads property file into memory.
* <P>
*
* @param fileName file name
* @exception EBaseException failed to load configuration
*/
public void load(String fileName) throws EBaseException {
try {
FileInputStream fi = new FileInputStream(fileName);
BufferedInputStream bis = new BufferedInputStream(fi);
super.load(bis);
} catch (IOException e) {
throw new EBaseException("input stream error " + fileName, e);
}
}
/**
* The original config file is copied to
* <filename>.<current_time_in_milliseconds>.
* Commits the current properties to the configuration file.
* <P>
*
* @param backup
*/
public void commit(boolean createBackup) throws EBaseException {
if (createBackup) {
File newName = new File(mFile.getPath() + "." +
Long.toString(System.currentTimeMillis()));
try {
if( Utils.isNT() ) {
// NT is very picky on the path
Utils.exec( "copy " +
mFile.getAbsolutePath().replace( '/', '\\' ) +
" " +
newName.getAbsolutePath().replace( '/',
'\\' ) );
} else {
// Create a copy of the original file which
// preserves the original file permissions.
Utils.exec( "cp -p " + mFile.getAbsolutePath() + " " +
newName.getAbsolutePath() );
}
// Proceed only if the backup copy was successful.
if( !newName.exists() ) {
throw new EBaseException( "backup copy failed" );
} else {
// Make certain that the backup file has
// the correct permissions.
if( !Utils.isNT() ) {
Utils.exec( "chmod 00660 " + newName.getAbsolutePath() );
}
}
} catch( EBaseException e ) {
throw new EBaseException( "backup copy failed" );
}
}
// Overwrite the contents of the original file
// to preserve the original file permissions.
save( mFile.getPath() );
try {
// Make certain that the original file retains
// the correct permissions.
if( !Utils.isNT() ) {
Utils.exec( "chmod 00660 " + mFile.getCanonicalPath() );
}
} catch( Exception e ) {
}
}
/**
* Saves in-memory properties to a specified file.
* <P>
* Note that the superclass's save is synchronized. It
* means no properties can be altered (inserted) at
* the saving time.
* <P>
*
* @param fileName filename
* @exception EBaseException failed to save configuration
*/
public void save(String fileName) throws EBaseException {
try {
FileOutputStream fo = new FileOutputStream(fileName);
PrintWriter writer = new PrintWriter(new OutputStreamWriter(fo));
printSubStore(writer, this, "");
writer.close();
fo.close();
} catch (IOException e) {
throw new EBaseException("output stream error " + fileName, e);
}
}
private void printSubStore(PrintWriter writer, IConfigStore store,
String name) throws EBaseException,
IOException {
// print keys
Enumeration e0 = store.getPropertyNames();
Vector v = new Vector();
while (e0.hasMoreElements()) {
v.addElement(e0.nextElement());
}
// sorting them lexicographically
while (v.size() > 0) {
String pname = (String) v.firstElement();
int j = 0;
for (int i = 1; i < v.size(); i++) {
String s = (String) v.elementAt(i);
if (pname.compareTo(s) > 0) {
j = i;
pname = (String) v.elementAt(i);
}
}
v.removeElementAt(j);
writer.println(name + pname + "=" + store.getString(pname));
}
// print substores
Enumeration e1 = store.getSubStoreNames();
while (e1.hasMoreElements()) {
v.addElement(e1.nextElement());
}
while (v.size() > 0) {
String pname = (String) v.firstElement();
int j = 0;
for (int i = 1; i < v.size(); i++) {
String s = (String) v.elementAt(i);
if (pname.compareTo(s) > 0) {
j = i;
pname = (String) v.elementAt(i);
}
}
v.removeElementAt(j);
printSubStore(writer, store.getSubStore(pname), name +
pname + ".");
}
}
}
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