/*
* Copyright 2015 JBoss, by Red Hat, Inc
*
* 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.uberfire.ext.metadata.backend.lucene.index.directory;
import java.io.File;
import java.io.IOException;
import org.apache.commons.io.FileDeleteStrategy;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.store.MMapDirectory;
import org.apache.lucene.store.NIOFSDirectory;
import org.apache.lucene.store.RAMDirectory;
import org.uberfire.ext.metadata.backend.lucene.index.LuceneIndex;
import org.uberfire.ext.metadata.model.KCluster;
public enum DirectoryType {
INMEMORY {
@Override
public LuceneIndex newIndex(final KCluster cluster,
final IndexWriterConfig config) {
final Directory directory = new Directory(new RAMDirectory(),
new DeleteCommand() {
@Override
public void execute(org.apache.lucene.store.Directory directory) {
}
},
true);
return new DirectoryLuceneIndex(cluster,
directory,
config);
}
},
NIO {
@Override
public LuceneIndex newIndex(final KCluster cluster,
final IndexWriterConfig config) {
final File clusterDir = clusterDir(cluster.getClusterId());
final NIOFSDirectory luceneDir;
try {
luceneDir = new NIOFSDirectory(clusterDir.toPath());
} catch (IOException e) {
throw new org.uberfire.java.nio.IOException(e);
}
final Directory directory = new Directory(luceneDir,
new DeleteCommand() {
@Override
public void execute(org.apache.lucene.store.Directory directory) {
((NIOFSDirectory) directory).close();
FileDeleteStrategy.FORCE.deleteQuietly(clusterDir);
}
},
freshIndex(clusterDir));
return new DirectoryLuceneIndex(cluster,
directory,
config);
}
},
MMAP {
@Override
public LuceneIndex newIndex(final KCluster cluster,
final IndexWriterConfig config) {
final File clusterDir = clusterDir(cluster.getClusterId());
final MMapDirectory luceneDir;
try {
luceneDir = new MMapDirectory(clusterDir.toPath());
} catch (IOException e) {
throw new org.uberfire.java.nio.IOException(e);
}
final Directory directory = new Directory(luceneDir,
new DeleteCommand() {
@Override
public void execute(org.apache.lucene.store.Directory directory) {
((MMapDirectory) directory).close();
FileDeleteStrategy.FORCE.deleteQuietly(clusterDir);
}
},
freshIndex(clusterDir));
return new DirectoryLuceneIndex(cluster,
directory,
config);
}
};
private static File clusterDir(final String clusterId) {
return new File(DirectoryFactory.defaultHostingDir(),
clusterId);
}
private static boolean freshIndex(final File clusterDir) {
return !clusterDir.exists();
}
public abstract LuceneIndex newIndex(final KCluster cluster,
final IndexWriterConfig config);
}