/*
* $Header: /home/cvs/jakarta-slide/src/stores/org/apache/slide/store/txfile/TxFileContentStore.java,v 1.4.2.1 2004/02/05 16:07:53 mholz Exp $
* $Revision: 1.4.2.1 $
* $Date: 2004/02/05 16:07:53 $
*
* ====================================================================
*
* Copyright 1999-2002 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.slide.store.txfile;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.slide.common.ServiceAccessException;
import org.apache.slide.common.Uri;
import org.apache.slide.content.NodeRevisionContent;
import org.apache.slide.content.NodeRevisionDescriptor;
import org.apache.slide.content.RevisionAlreadyExistException;
import org.apache.slide.content.RevisionNotFoundException;
import org.apache.slide.store.ContentStore;
import org.apache.slide.store.txfile.rm.ResourceManagerException;
import org.apache.slide.store.util.*;
/**
* Transactional content file store.
*
* @author <a href="mailto:ozeigermann@c1-fse.de">Oliver Zeigermann</a>
*/
public class TxFileContentStore extends AbstractTxFileStoreService implements ContentStore {
public NodeRevisionContent retrieveRevisionContent(Uri uri, NodeRevisionDescriptor revisionDescriptor)
throws ServiceAccessException, RevisionNotFoundException {
String revisionUri = uri.toString() + "_" + revisionDescriptor.getRevisionNumber();
try {
Object txId = getActiveTxId();
InputStream is;
if (txId != null) {
is = rm.readResource(txId, revisionUri);
} else {
is = rm.readResource(revisionUri);
}
NodeRevisionContent result = new NodeRevisionContent();
result.setContent(is);
return result;
} catch (ResourceManagerException e) {
if (e.getStatus() == ResourceManagerException.ERR_NO_SUCH_RESOURCE) {
throw new RevisionNotFoundException(uri.toString(), revisionDescriptor.getRevisionNumber());
} else {
throwInternalError(e, uri.toString());
return null; // XXX fake (is never called)
}
}
}
public void createRevisionContent(
Uri uri,
NodeRevisionDescriptor revisionDescriptor,
NodeRevisionContent revisionContent)
throws ServiceAccessException, RevisionAlreadyExistException {
String revisionUri = revisionUri = uri.toString() + "_" + revisionDescriptor.getRevisionNumber();
try {
rm.createResource(getActiveTxId(), revisionUri, false);
storeRevisionContent(uri, revisionDescriptor, revisionContent);
} catch (RevisionNotFoundException e) {
// Can not be, as we just created it. If it unexpectedly is, this is fatal
throwInternalError(e, uri.toString());
} catch (ResourceManagerException e) {
if (e.getStatus() == ResourceManagerException.ERR_RESOURCE_EXISTS) {
throw new RevisionAlreadyExistException(uri.toString(), revisionDescriptor.getRevisionNumber());
} else {
throwInternalError(e, uri.toString());
}
}
}
public void storeRevisionContent(
Uri uri,
NodeRevisionDescriptor revisionDescriptor,
NodeRevisionContent revisionContent)
throws ServiceAccessException, RevisionNotFoundException {
String revisionUri = revisionUri = uri.toString() + "_" + revisionDescriptor.getRevisionNumber();
OutputStream os = null;
InputStream is = null;
try {
os = rm.writeResource(getActiveTxId(), revisionUri);
is = revisionContent.streamContent();
if (is != null) {
long contentBytes = FileHelper.copy(is, os);
long contentLength = revisionDescriptor.getContentLength();
revisionDescriptor.setContentLength(contentBytes);
if (contentLength != -1 && contentBytes != contentLength) {
rm.deleteResource(getActiveTxId(), revisionUri);
throwInternalError("Content length does not match expected");
}
}
} catch (IOException e) {
throwInternalError(e, uri.toString());
} catch (ResourceManagerException e) {
if (e.getStatus() == ResourceManagerException.ERR_NO_SUCH_RESOURCE) {
throw new RevisionNotFoundException(uri.toString(), revisionDescriptor.getRevisionNumber());
} else {
throwInternalError(e, uri.toString());
}
} finally {
try {
if (os != null) {
os.close();
}
} catch (IOException e) {
}
try {
if (is != null) {
is.close();
}
} catch (IOException e) {
}
}
}
public void removeRevisionContent(Uri uri, NodeRevisionDescriptor revisionDescriptor)
throws ServiceAccessException {
String revisionUri = uri.toString() + "_" + revisionDescriptor.getRevisionNumber();
try {
rm.deleteResource(getActiveTxId(), revisionUri);
} catch (ResourceManagerException e) {
throwInternalError(e, uri.toString());
}
}
}