org.opengroupware.logic.blobs.OGoRangeDirBlobStore.java Source code

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Here is the source code for org.opengroupware.logic.blobs.OGoRangeDirBlobStore.java

Source

/*
  Copyright (C) 2007 Helge Hess
    
  This file is part of OpenGroupware.org (OGo)
    
  OGo 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; either version 2, or (at your option) any
  later version.
    
  OGo 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 OGo; see the file COPYING.  If not, write to the
  Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  02111-1307, USA.
*/
package org.opengroupware.logic.blobs;

import java.io.File;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.getobjects.foundation.NSObject;

public class OGoRangeDirBlobStore extends NSObject implements IOGoBlobStore {
    protected static final Log log = LogFactory.getLog("OGoBlobStore");

    protected static final boolean UseFoldersForIDRanges = true;
    protected File root;
    protected int rangeSize;

    public OGoRangeDirBlobStore(final File _root) {
        super();
        this.root = _root;
        this.rangeSize = 1000; /* default OGo range size */
    }

    /* accessors */

    public File root() {
        return this.root;
    }

    public File blobFileForId(Number _id, Number _containerId, String _ext) {
        if (_id == null)
            return null;

        File container = null;

        /* container */

        if (_containerId != null) {
            container = new File(this.root, _containerId.toString());
            if (!container.exists()) {
                if (!container.mkdir()) {
                    /* probably a permission setup issue */
                    log.error("could not create BLOB directory for container '" + _containerId + "': " + container
                            + " (check filesystem permissions!)");
                    return null;
                }
            }
        } else
            container = this.root;

        /* folder ranges */

        if (UseFoldersForIDRanges) {
            long rangeId = _id.longValue();
            rangeId = rangeId - (rangeId % this.rangeSize);

            container = new File(container, Long.toString(rangeId));
            if (!container.exists()) {
                if (!container.mkdir()) {
                    /* probably a permission setup issue */
                    log.error("could not create BLOB directory for id-range '" + rangeId + "': " + container
                            + " (check filesystem permissions!)");
                    return null;
                }
            }
        }

        /* filename */

        final StringBuilder sb = new StringBuilder(128);
        sb.append(_id);
        if (_ext != null && _ext.length() > 0) {
            sb.append('.');
            sb.append(_ext);
        }

        return new File(container, sb.toString());
    }
}