package org.apache.blur.manager.writer;
/**
* 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.
*/
import java.io.IOException;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.blur.server.IndexSearcherClosable;
import org.apache.blur.thrift.generated.Row;
import org.apache.blur.utils.BlurUtil;
import org.apache.blur.utils.ClassNameFilter;
import org.apache.blur.utils.RamUsageEstimator;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexReaderContext;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TopDocs;
public abstract class BlurIndex {
private static final long ONE_MINUTE = TimeUnit.MINUTES.toMillis(1);
private long _lastMemoryCheck = 0;
private long _memoryUsage = 0;
public abstract void replaceRow(boolean waitToBeVisible, boolean wal, Row row) throws IOException;
public abstract void deleteRow(boolean waitToBeVisible, boolean wal, String rowId) throws IOException;
public abstract IndexSearcherClosable getIndexReader() throws IOException;
public abstract void close() throws IOException;
public abstract void refresh() throws IOException;
public abstract AtomicBoolean isClosed();
public abstract void optimize(int numberOfSegmentsPerShard) throws IOException;
public abstract void createSnapshot(String name) throws IOException;
public abstract void removeSnapshot(String name) throws IOException;
public abstract List<String> getSnapshots() throws IOException;
public long getRecordCount() throws IOException {
IndexSearcherClosable searcher = getIndexReader();
try {
return searcher.getIndexReader().numDocs();
} finally {
if (searcher != null) {
searcher.close();
}
}
}
public long getRowCount() throws IOException {
IndexSearcherClosable searcher = getIndexReader();
try {
return getRowCount(searcher);
} finally {
if (searcher != null) {
searcher.close();
}
}
}
protected long getRowCount(IndexSearcher searcher) throws IOException {
TopDocs topDocs = searcher.search(new TermQuery(BlurUtil.PRIME_DOC_TERM), 1);
return topDocs.totalHits;
}
public long getIndexMemoryUsage() throws IOException {
long now = System.currentTimeMillis();
if (_lastMemoryCheck + ONE_MINUTE > now) {
return _memoryUsage;
}
IndexSearcherClosable searcher = getIndexReader();
try {
IndexReaderContext topReaderContext = searcher.getTopReaderContext();
return _memoryUsage = RamUsageEstimator.sizeOf(topReaderContext, new ClassNameFilter() {
@Override
public boolean include(String className) {
if (className.startsWith("org.apache.blur.index.ExitableReader")) {
return true;
} else if (className.startsWith("org.apache.blur.")) {
// System.out.println("className [" + className + "]");
return false;
}
return true;
}
});
} finally {
searcher.close();
_lastMemoryCheck = System.currentTimeMillis();
}
}
public long getSegmentCount() throws IOException {
IndexSearcherClosable indexSearcherClosable = getIndexReader();
try {
IndexReader indexReader = indexSearcherClosable.getIndexReader();
IndexReaderContext context = indexReader.getContext();
return context.leaves().size();
} finally {
indexSearcherClosable.close();
}
}
}