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// Copyright (C) 2013 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.server.index;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.collect.Lists;
import com.google.gerrit.extensions.registration.DynamicSet;
import com.google.gerrit.index.Index;
import com.google.gerrit.index.IndexCollection;
import com.google.gerrit.index.IndexDefinition;
import com.google.gerrit.index.SiteIndexer;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class OnlineReindexer> {
private static final Logger log = LoggerFactory.getLogger(OnlineReindexer.class);
private final String name;
private final IndexCollection indexes;
private final SiteIndexer batchIndexer;
private final int oldVersion;
private final int newVersion;
private final DynamicSet listeners;
private I index;
private final AtomicBoolean running = new AtomicBoolean();
public OnlineReindexer(
IndexDefinition def,
int oldVersion,
int newVersion,
DynamicSet listeners) {
this.name = def.getName();
this.indexes = def.getIndexCollection();
this.batchIndexer = def.getSiteIndexer();
this.oldVersion = oldVersion;
this.newVersion = newVersion;
this.listeners = listeners;
}
public void start() {
if (running.compareAndSet(false, true)) {
Thread t =
new Thread() {
@Override
public void run() {
boolean ok = false;
try {
reindex();
ok = true;
} catch (IOException e) {
log.error("Online reindex of {} schema version {} failed", name, version(index), e);
} finally {
running.set(false);
if (!ok) {
for (OnlineUpgradeListener listener : listeners) {
listener.onFailure(name, oldVersion, newVersion);
}
}
}
}
};
t.setName(
String.format("Reindex %s v%d-v%d", name, version(indexes.getSearchIndex()), newVersion));
t.start();
}
}
public boolean isRunning() {
return running.get();
}
public int getVersion() {
return newVersion;
}
private static int version(Index i) {
return i.getSchema().getVersion();
}
private void reindex() throws IOException {
for (OnlineUpgradeListener listener : listeners) {
listener.onStart(name, oldVersion, newVersion);
}
index =
checkNotNull(
indexes.getWriteIndex(newVersion),
"not an active write schema version: %s %s",
name,
newVersion);
log.info(
"Starting online reindex of {} from schema version {} to {}",
name,
version(indexes.getSearchIndex()),
version(index));
if (oldVersion != newVersion) {
index.deleteAll();
}
SiteIndexer.Result result = batchIndexer.indexAll(index);
if (!result.success()) {
log.error(
"Online reindex of {} schema version {} failed. Successfully"
+ " indexed {}, failed to index {}",
name,
version(index),
result.doneCount(),
result.failedCount());
return;
}
log.info("Reindex {} to version {} complete", name, version(index));
activateIndex();
for (OnlineUpgradeListener listener : listeners) {
listener.onSuccess(name, oldVersion, newVersion);
}
}
public void activateIndex() {
indexes.setSearchIndex(index);
log.info("Using {} schema version {}", name, version(index));
try {
index.markReady(true);
} catch (IOException e) {
log.warn("Error activating new {} schema version {}", name, version(index));
}
List toRemove = Lists.newArrayListWithExpectedSize(1);
for (I i : indexes.getWriteIndexes()) {
if (version(i) != version(index)) {
toRemove.add(i);
}
}
for (I i : toRemove) {
try {
i.markReady(false);
indexes.removeWriteIndex(version(i));
} catch (IOException e) {
log.warn("Error deactivating old {} schema version {}", name, version(i));
}
}
}
}
