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/**
* This file is part of the CRISTAL-iSE kernel.
* Copyright (c) 2001-2014 The CRISTAL Consortium. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
* http://www.fsf.org/licensing/licenses/lgpl.html
*/
package org.cristalise.storage;
import java.io.File;
import java.util.ArrayList;
import org.cristalise.kernel.common.PersistencyException;
import org.cristalise.kernel.entity.C2KLocalObject;
import org.cristalise.kernel.lookup.InvalidItemPathException;
import org.cristalise.kernel.lookup.ItemPath;
import org.cristalise.kernel.persistency.ClusterStorage;
import org.cristalise.kernel.persistency.outcome.Outcome;
import org.cristalise.kernel.process.Gateway;
import org.cristalise.kernel.process.auth.Authenticator;
import org.cristalise.kernel.utils.FileStringUtility;
import org.cristalise.kernel.utils.Logger;
public class XMLClusterStorage extends ClusterStorage {
String rootDir=null;
public XMLClusterStorage() {
}
@Override
public void open(Authenticator auth) throws PersistencyException {
String rootProp = Gateway.getProperties().getString("XMLStorage.root");
if (rootProp == null)
throw new PersistencyException("XMLClusterStorage.open() - Root path not given in config file.");
rootDir = new File(rootProp).getAbsolutePath();
if( !FileStringUtility.checkDir( rootDir ) ) {
Logger.error("XMLClusterStorage.open() - Path " + rootDir + "' does not exist. Attempting to create.");
boolean success = FileStringUtility.createNewDir(rootDir);
if (!success) throw new PersistencyException("XMLClusterStorage.open() - Could not create dir "+ rootDir +". Cannot continue.");
}
}
@Override
public void close() {
rootDir = null;
}
// introspection
@Override
public short queryClusterSupport(String clusterType) {
return ClusterStorage.READWRITE;
}
@Override
public String getName() {
return "XML File Cluster Storage";
}
@Override
public String getId() {
return "XML";
}
/* object manipulation */
// retrieve object by path
@Override
public C2KLocalObject get(ItemPath itemPath, String path) throws PersistencyException {
try {
String type = ClusterStorage.getClusterType(path);
String filePath = getFilePath(itemPath, path)+".xml";
String objString = FileStringUtility.file2String(filePath);
if (objString.length() == 0) return null;
Logger.debug(9, objString);
if (type.equals("Outcome"))
return new Outcome(path, objString);
else {
C2KLocalObject obj = (C2KLocalObject)Gateway.getMarshaller().unmarshall(objString);
return obj;
}
} catch (Exception e) {
Logger.msg(3,"XMLClusterStorage.get() - The path "+path+" from "+itemPath+" does not exist.: "+e.getMessage());
}
return null;
}
// store object by path
@Override
public void put(ItemPath itemPath, C2KLocalObject obj) throws PersistencyException {
try {
String filePath = getFilePath(itemPath, getPath(obj)+".xml");
Logger.msg(7, "Writing "+filePath);
String data = Gateway.getMarshaller().marshall(obj);
String dir = filePath.substring(0, filePath.lastIndexOf('/'));
if( !FileStringUtility.checkDir( dir ) ) {
boolean success = FileStringUtility.createNewDir(dir);
if (!success) throw new PersistencyException("XMLClusterStorage.put() - Could not create dir "+ dir +". Cannot continue.");
}
FileStringUtility.string2File(filePath, data);
} catch (Exception e) {
Logger.error(e);
throw new PersistencyException("XMLClusterStorage.put() - Could not write "+getPath(obj)+" to "+itemPath);
}
}
// delete cluster
@Override
public void delete(ItemPath itemPath, String path) throws PersistencyException {
try {
String filePath = getFilePath(itemPath, path+".xml");
boolean success = FileStringUtility.deleteDir(filePath, true, true);
if (success) return;
filePath = getFilePath(itemPath, path);
success = FileStringUtility.deleteDir(filePath, true, true);
if (success) return;
} catch(Exception e) { }
throw new PersistencyException("XMLClusterStorage.delete() - Failure deleting path "+path+" in "+itemPath);
}
/* navigation */
// directory listing
@Override
public String[] getClusterContents(ItemPath itemPath, String path) throws PersistencyException {
String[] result = new String[0];
try {
String filePath = getFilePath(itemPath, path);
ArrayList<String> paths = FileStringUtility.listDir( filePath, true, false );
if (paths == null) return result; // dir doesn't exist yet
ArrayList<String> contents = new ArrayList<String>();
String previous = null;
for (int i=0; i<paths.size(); i++) {
String next = paths.get(i);
// trim off the xml from the end if it's there
if (next.endsWith(".xml")) next = next.substring(0, next.length()-4);
// avoid duplicates (xml and dir)
if (next.equals(previous)) continue;
previous = next;
// only keep the last bit of the path
if (next.indexOf('/') > -1) next = next.substring(next.lastIndexOf('/')+1);
contents.add(next);
}
result = contents.toArray(result);
return result;
} catch (Exception e) {
Logger.error(e);
throw new PersistencyException("XMLClusterStorage.getClusterContents() - Could not get contents of "+path+" from "+itemPath+": "+e.getMessage());
}
}
protected String getFilePath(ItemPath itemPath, String path) throws InvalidItemPathException {
if (path.length() == 0 || path.charAt(0) != '/') path = "/"+path;
String filePath = rootDir+itemPath.toString()+path;
Logger.msg(8, "XMLClusterStorage.getFilePath() - "+filePath);
return filePath;
}
}
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