/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.lucene.gdata.storage.lucenestorage.recover;
import java.io.IOException;
import java.io.Writer;
import org.apache.lucene.gdata.server.registry.ProvidedService;
import org.apache.lucene.gdata.storage.lucenestorage.StorageEntryWrapper;
import org.apache.lucene.gdata.storage.lucenestorage.StorageEntryWrapper.StorageOperation;
import com.google.gdata.data.BaseEntry;
import com.google.gdata.util.common.xml.XmlWriter;
/**
* Writes the recover objects to the hard disc.
* @author Simon Willnauer
*
*/
public class RecoverWriter {
protected static final String META_DATA_SEPARATOR = ";";
protected static final String META_DATA_ENTRY_SEPARATOR = System.getProperty("line.separator");
protected static final String STORAGE_OPERATION_SEPARATOR = "###########";
protected static final String OPERATION_DELETE = "D";
protected static final String OPERATION_UPDATE = "U";
protected static final String OPERATION_INSERT = "I";
protected static final String FILE_PREFIX = ".strg";
/**
* @param wrapper
* @throws IOException
*
*
*
*/
public void writeEntry(StorageEntryWrapper wrapper,Writer writer)throws IOException{
writeOperation(wrapper.getOperation(),writer);
writeFeedID(wrapper.getFeedId(),writer);
writeEntryID(wrapper.getEntryId(),writer);
writeTimeStamp(wrapper.getTimestamp().toString(),writer);
if(!wrapper.getOperation().equals(StorageOperation.DELETE)){
writeService(wrapper,writer);
writer.write(META_DATA_ENTRY_SEPARATOR);
BaseEntry entry = wrapper.getEntry();
XmlWriter xmlWriter = new XmlWriter(writer);
entry.generateAtom(xmlWriter,wrapper.getConfigurator().getExtensionProfile());
}
writer.write(META_DATA_ENTRY_SEPARATOR);
writer.write(STORAGE_OPERATION_SEPARATOR);
writer.write(META_DATA_ENTRY_SEPARATOR);
writer.flush();
}
private void writeTimeStamp(String timestamp, Writer writer) throws IOException{
writer.write(timestamp);
writer.write(META_DATA_SEPARATOR);
}
private void writeFeedID(String feedId,Writer writer) throws IOException{
writer.write(feedId);
writer.write(META_DATA_SEPARATOR);
}
private void writeEntryID(String entryId,Writer writer) throws IOException{
writer.write(entryId);
writer.write(META_DATA_SEPARATOR);
}
private void writeService(StorageEntryWrapper wrapper, Writer writer) throws IOException{
ProvidedService config = wrapper.getConfigurator();
writer.write(config.getName());
writer.write(META_DATA_SEPARATOR);
}
private void writeOperation(StorageOperation operation, Writer writer) throws IOException{
if(operation.equals(StorageOperation.INSERT))
writer.write(OPERATION_INSERT);
else if (operation.equals(StorageOperation.UPDATE))
writer.write(OPERATION_UPDATE);
else if (operation.equals(StorageOperation.DELETE))
writer.write(OPERATION_DELETE);
writer.write(META_DATA_SEPARATOR);
}
}