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Apply fix for LUCENE-5330 pruning the IndexWriter queue to get rid of…
… pending event Closes #4093
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/* | ||
* Licensed to ElasticSearch and Shay Banon under one | ||
* or more contributor license agreements. See the NOTICE file | ||
* distributed with this work for additional information | ||
* regarding copyright ownership. ElasticSearch 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. | ||
*/ | ||
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package org.apache.lucene.index; | ||
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import org.apache.lucene.store.Directory; | ||
import org.apache.lucene.util.Version; | ||
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import java.io.IOException; | ||
import java.lang.reflect.Method; | ||
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public final class XIndexWriter extends IndexWriter { | ||
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private static final Method processEvents; | ||
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static { | ||
// fix for https://issues.apache.org/jira/browse/LUCENE-5330 | ||
assert Version.LUCENE_45.onOrAfter(org.elasticsearch.Version.CURRENT.luceneVersion) : "This should be fixed in LUCENE-4.6"; | ||
try { | ||
processEvents = IndexWriter.class.getDeclaredMethod("processEvents", boolean.class, boolean.class); | ||
processEvents.setAccessible(true); | ||
} catch (NoSuchMethodException e) { | ||
throw new RuntimeException(e); | ||
} | ||
} | ||
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public XIndexWriter(Directory d, IndexWriterConfig conf) throws IOException { | ||
super(d, conf); | ||
} | ||
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private void processEvents() { | ||
try { | ||
processEvents.invoke(this, false, true); | ||
} catch (Exception e) { | ||
throw new RuntimeException(e); | ||
} | ||
} | ||
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@Override | ||
public void rollback() throws IOException { | ||
super.rollback(); | ||
processEvents(); | ||
} | ||
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@Override | ||
public void close(boolean waitForMerges) throws IOException { | ||
super.close(waitForMerges); | ||
processEvents(); | ||
} | ||
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@Override | ||
DirectoryReader getReader(boolean applyAllDeletes) throws IOException { | ||
DirectoryReader reader = super.getReader(applyAllDeletes); | ||
processEvents(); | ||
return reader; | ||
} | ||
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} |
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