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// Copyright (C) 2014 The Android Open Source Project
//
// 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 com.google.gerrit.lucene;
import java.io.IOException;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.IndexableField;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.Query;
import org.apache.lucene.store.Directory;
/** Writer that optionally flushes/commits after every write. */
public class AutoCommitWriter extends IndexWriter {
private boolean autoCommit;
AutoCommitWriter(Directory dir, IndexWriterConfig config) throws IOException {
this(dir, config, false);
}
AutoCommitWriter(Directory dir, IndexWriterConfig config, boolean autoCommit) throws IOException {
super(dir, config);
setAutoCommit(autoCommit);
}
/**
* This method will override Gerrit configuration index.name.commitWithin until next Gerrit
* restart (or reconfiguration through this method).
*
* @param enable auto commit
*/
public void setAutoCommit(boolean enable) {
this.autoCommit = enable;
}
@Override
public long addDocument(Iterable<? extends IndexableField> doc) throws IOException {
long ret = super.addDocument(doc);
autoFlush();
return ret;
}
@Override
public long addDocuments(Iterable<? extends Iterable<? extends IndexableField>> docs)
throws IOException {
long ret = super.addDocuments(docs);
autoFlush();
return ret;
}
@Override
public long updateDocuments(
Term delTerm, Iterable<? extends Iterable<? extends IndexableField>> docs)
throws IOException {
long ret = super.updateDocuments(delTerm, docs);
autoFlush();
return ret;
}
@Override
public long deleteDocuments(Term... term) throws IOException {
long ret = super.deleteDocuments(term);
autoFlush();
return ret;
}
@Override
public synchronized long tryDeleteDocument(IndexReader readerIn, int docID) throws IOException {
long ret = super.tryDeleteDocument(readerIn, docID);
if (ret != -1) {
autoFlush();
}
return ret;
}
@Override
public long deleteDocuments(Query... queries) throws IOException {
long ret = super.deleteDocuments(queries);
autoFlush();
return ret;
}
@Override
public long updateDocument(Term term, Iterable<? extends IndexableField> doc) throws IOException {
long ret = super.updateDocument(term, doc);
autoFlush();
return ret;
}
@Override
public long deleteAll() throws IOException {
long ret = super.deleteAll();
autoFlush();
return ret;
}
void manualFlush() throws IOException {
flush();
if (autoCommit) {
commit();
}
}
public void autoFlush() throws IOException {
if (autoCommit) {
manualFlush();
}
}
}
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