com.google.gerrit.lucene.AutoCommitWriter.java Source code

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Here is the source code for com.google.gerrit.lucene.AutoCommitWriter.java

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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 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;

import java.io.IOException;

/** Writer that optionally flushes/commits after every write. */
class AutoCommitWriter extends IndexWriter {
    private boolean autoCommit;

    AutoCommitWriter(Directory dir, IndexWriterConfig config, boolean autoCommit) throws IOException {
        super(dir, config);
        this.autoCommit = autoCommit;
    }

    @Override
    public void addDocument(Iterable<? extends IndexableField> doc) throws IOException {
        super.addDocument(doc);
        autoFlush();
    }

    @Override
    public void addDocuments(Iterable<? extends Iterable<? extends IndexableField>> docs) throws IOException {
        super.addDocuments(docs);
        autoFlush();
    }

    @Override
    public void updateDocuments(Term delTerm, Iterable<? extends Iterable<? extends IndexableField>> docs)
            throws IOException {
        super.updateDocuments(delTerm, docs);
        autoFlush();
    }

    @Override
    public void deleteDocuments(Term... term) throws IOException {
        super.deleteDocuments(term);
        autoFlush();
    }

    @Override
    public synchronized boolean tryDeleteDocument(IndexReader readerIn, int docID) throws IOException {
        boolean ret = super.tryDeleteDocument(readerIn, docID);
        if (ret) {
            autoFlush();
        }
        return ret;
    }

    @Override
    public void deleteDocuments(Query... queries) throws IOException {
        super.deleteDocuments(queries);
        autoFlush();
    }

    @Override
    public void updateDocument(Term term, Iterable<? extends IndexableField> doc) throws IOException {
        super.updateDocument(term, doc);
        autoFlush();
    }

    @Override
    public void deleteAll() throws IOException {
        super.deleteAll();
        autoFlush();
    }

    void manualFlush() throws IOException {
        flush(true, true);
        if (autoCommit) {
            commit();
        }
    }

    private void autoFlush() throws IOException {
        if (autoCommit) {
            manualFlush();
        }
    }
}