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A PHP engine implemented in 100% Java
/*
* Copyright (c) 1998-2012 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Nam Nguyen
*/
package com.caucho.vfs;
import com.google.appengine.api.files.AppEngineFile;
import com.google.appengine.api.files.FileService;
import com.google.appengine.api.files.FileWriteChannel;
import com.google.appengine.api.files.GSFileOptions.GSFileOptionsBuilder;
import java.io.IOException;
public class GoogleStoreLockService
{
private FileService _fileService;
private String _bucket;
public GoogleStoreLockService(FileService fileService, String bucket)
{
_fileService = fileService;
_bucket = bucket;
}
public GoogleLock lock(String key)
{
try {
GSFileOptionsBuilder builder = new GSFileOptionsBuilder();
builder.setMimeType("application/octet-stream");
builder.setBucket(_bucket);
key = key.substring(1);
builder.setKey(key + ".LOCK");
AppEngineFile file = _fileService.createNewGSFile(builder.build());
boolean isLock = true;
FileWriteChannel os = _fileService.openWriteChannel(file, isLock);
return new GoogleLock(os);
}
catch (IOException e) {
return null;
}
}
}