opendev/gerrit
Code Issues Proposed changes

Revert "Support generic indexes in LuceneVersionManager"

Browse Source 
This reverts commit 1762bacf0c.

This seems to have broken master. New changes are not shown on the
ChangeScreen when pushed. git-bisect indicates that
Id6c58a595086e7dc22cbc7302169d96c4ccf1aa4 caused the problem.

Change-Id: I5d56a1630224242078b2109941adccc6d6d8d721
This commit is contained in:
Michael Zhou
2016-03-25 21:19:04 +00:00
parent 1762bacf0c
commit 6247b52f41
5 changed files with 65 additions and 105 deletions
Download Patch File Download Diff File Expand all files Collapse all files

144
gerrit-lucene/src/main/java/com/google/gerrit/lucene/LuceneVersionManager.java
View File

@@ -20,14 +20,15 @@ import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.primitives.Ints;
import com.google.gerrit.extensions.events.LifecycleListener;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.config.SitePaths;
import com.google.gerrit.server.index.Index;
import com.google.gerrit.server.index.IndexCollection;
import com.google.gerrit.server.index.IndexDefinition;
import com.google.gerrit.server.index.IndexDefinition.IndexFactory;
import com.google.gerrit.server.index.OnlineReindexer;
import com.google.gerrit.server.index.Schema;
import com.google.gerrit.server.index.change.ChangeIndex;
import com.google.gerrit.server.index.change.ChangeIndexCollection;
import com.google.gerrit.server.index.change.ChangeIndexDefinition;
import com.google.gerrit.server.query.change.ChangeData;
import com.google.inject.Inject;
import com.google.inject.ProvisionException;
import com.google.inject.Singleton;
@@ -45,7 +46,6 @@ import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
@Singleton
@@ -55,13 +55,13 @@ public class LuceneVersionManager implements LifecycleListener {
static final String CHANGES_PREFIX = "changes_";
private static class Version<V> {
private final Schema<V> schema;
private static class Version {
private final Schema<ChangeData> schema;
private final int version;
private final boolean exists;
private final boolean ready;
private Version(Schema<V> schema, int version, boolean exists,
private Version(Schema<ChangeData> schema, int version, boolean exists,
boolean ready) {
checkArgument(schema == null || schema.getVersion() == version);
this.schema = schema;
@@ -94,32 +94,33 @@ public class LuceneVersionManager implements LifecycleListener {
}
private final SitePaths sitePaths;
private final Map<String, IndexDefinition<?, ?, ?>> defs;
private final Map<String, OnlineReindexer<?, ?, ?>> reindexers;
private final LuceneChangeIndex.Factory indexFactory;
private final ChangeIndexCollection indexes;
private final ChangeIndexDefinition changeDef;
private final boolean onlineUpgrade;
private final String runReindexMsg;
private OnlineReindexer<Change.Id, ChangeData, ChangeIndex> reindexer;
@Inject
LuceneVersionManager(
@GerritServerConfig Config cfg,
SitePaths sitePaths,
Collection<IndexDefinition<?, ?, ?>> defs) {
LuceneChangeIndex.Factory indexFactory,
ChangeIndexCollection indexes,
ChangeIndexDefinition changeDef) {
this.sitePaths = sitePaths;
this.defs = Maps.newHashMapWithExpectedSize(defs.size());
for (IndexDefinition<?, ?, ?> def : defs) {
this.defs.put(def.getName(), def);
}
reindexers = Maps.newHashMapWithExpectedSize(defs.size());
onlineUpgrade = cfg.getBoolean("index", null, "onlineUpgrade", true);
runReindexMsg =
"No index versions ready; run java -jar " +
sitePaths.gerrit_war.toAbsolutePath() +
" reindex";
this.indexFactory = indexFactory;
this.indexes = indexes;
this.changeDef = changeDef;
this.onlineUpgrade = cfg.getBoolean("index", null, "onlineUpgrade", true);
}
@Override
public void start() {
String runReindex =
"No index versions ready; run java -jar " +
sitePaths.gerrit_war.toAbsolutePath() +
" reindex";
FileBasedConfig cfg;
try {
cfg = loadGerritIndexConfig(sitePaths);
@@ -128,25 +129,18 @@ public class LuceneVersionManager implements LifecycleListener {
}
if (!Files.exists(sitePaths.index_dir)) {
throw new ProvisionException(runReindexMsg);
throw new ProvisionException(runReindex);
} else if (!Files.exists(sitePaths.index_dir)) {
log.warn("Not a directory: %s", sitePaths.index_dir.toAbsolutePath());
throw new ProvisionException(runReindexMsg);
throw new ProvisionException(runReindex);
}
for (IndexDefinition<?, ?, ?> def : defs.values()) {
initIndex(def, cfg);
}
}
private <K, V, I extends Index<K, V>> void initIndex(
IndexDefinition<K, V, I> def, FileBasedConfig cfg) {
TreeMap<Integer, Version<V>> versions = scanVersions(def, cfg);
TreeMap<Integer, Version> versions = scanVersions(cfg);
// Search from the most recent ready version.
// Write to the most recent ready version and the most recent version.
Version<V> search = null;
List<Version<V>> write = Lists.newArrayListWithCapacity(2);
for (Version<V> v : versions.descendingMap().values()) {
Version search = null;
List<Version> write = Lists.newArrayListWithCapacity(2);
for (Version v : versions.descendingMap().values()) {
if (v.schema == null) {
continue;
}
@@ -162,35 +156,27 @@ public class LuceneVersionManager implements LifecycleListener {
}
}
if (search == null) {
throw new ProvisionException(runReindexMsg);
throw new ProvisionException(runReindex);
}
IndexFactory<K, V, I> factory = def.getIndexFactory();
I searchIndex = factory.create(search.schema);
IndexCollection<K, V, I> indexes = def.getIndexCollection();
markNotReady(cfg, versions.values(), write);
LuceneChangeIndex searchIndex =
(LuceneChangeIndex) indexFactory.create(search.schema);
indexes.setSearchIndex(searchIndex);
for (Version<V> v : write) {
for (Version v : write) {
if (v.schema != null) {
if (v.version != search.version) {
indexes.addWriteIndex(factory.create(v.schema));
indexes.addWriteIndex(indexFactory.create(v.schema));
} else {
indexes.addWriteIndex(searchIndex);
}
} else {
indexes.addWriteIndex(searchIndex);
}
}
// TODO: include index name.
markNotReady(cfg, versions.values(), write);
int latest = write.get(0).version;
if (onlineUpgrade && latest != search.version) {
OnlineReindexer<K, V, I> reindexer = new OnlineReindexer<>(def, latest);
synchronized (this) {
if (!reindexers.containsKey(def.getName())) {
reindexers.put(def.getName(), reindexer);
reindexer.start();
}
}
reindexer = new OnlineReindexer<>(changeDef, latest);
reindexer.start();
}
}
@@ -200,11 +186,10 @@ public class LuceneVersionManager implements LifecycleListener {
* @return true if started, otherwise false.
* @throws ReindexerAlreadyRunningException
*/
public synchronized boolean startReindexer(String name)
public synchronized boolean startReindexer()
throws ReindexerAlreadyRunningException {
OnlineReindexer<?, ?, ?> reindexer = reindexers.get(name);
validateReindexerNotRunning(reindexer);
if (!isCurrentIndexVersionLatest(name, reindexer)) {
validateReindexerNotRunning();
if (!isCurrentIndexVersionLatest()) {
reindexer.start();
return true;
}
@@ -217,56 +202,49 @@ public class LuceneVersionManager implements LifecycleListener {
* @return true if index was activate, otherwise false.
* @throws ReindexerAlreadyRunningException
*/
public synchronized boolean activateLatestIndex(String name)
public synchronized boolean activateLatestIndex()
throws ReindexerAlreadyRunningException {
OnlineReindexer<?, ?, ?> reindexer = reindexers.get(name);
validateReindexerNotRunning(reindexer);
if (!isCurrentIndexVersionLatest(name, reindexer)) {
validateReindexerNotRunning();
if (!isCurrentIndexVersionLatest()) {
reindexer.activateIndex();
return true;
}
return false;
}
private boolean isCurrentIndexVersionLatest(
String name, OnlineReindexer<?, ?, ?> reindexer) {
int readVersion = defs.get(name).getIndexCollection().getSearchIndex()
.getSchema().getVersion();
private boolean isCurrentIndexVersionLatest() {
return reindexer == null
|| reindexer.getVersion() == readVersion;
|| reindexer.getVersion() == indexes.getSearchIndex().getSchema()
.getVersion();
}
private static void validateReindexerNotRunning(
OnlineReindexer<?, ?, ?> reindexer)
private void validateReindexerNotRunning()
throws ReindexerAlreadyRunningException {
if (reindexer != null && reindexer.isRunning()) {
throw new ReindexerAlreadyRunningException();
}
}
private <K, V, I extends Index<K, V>> TreeMap<Integer, Version<V>>
scanVersions(IndexDefinition<K, V, I> def, Config cfg) {
TreeMap<Integer, Version<V>> versions = Maps.newTreeMap();
for (Schema<V> schema : def.getSchemas().values()) {
// This part is Lucene-specific.
Path p = getDir(sitePaths, def.getName(), schema);
private TreeMap<Integer, Version> scanVersions(Config cfg) {
TreeMap<Integer, Version> versions = Maps.newTreeMap();
for (Schema<ChangeData> schema : changeDef.getSchemas().values()) {
Path p = getDir(sitePaths, CHANGES_PREFIX, schema);
boolean isDir = Files.isDirectory(p);
if (Files.exists(p) && !isDir) {
log.warn("Not a directory: %s", p.toAbsolutePath());
}
int v = schema.getVersion();
versions.put(v, new Version<>(schema, v, isDir, getReady(cfg, v)));
versions.put(v, new Version(schema, v, isDir, getReady(cfg, v)));
}
String prefix = def.getName() + "_";
try (DirectoryStream<Path> paths =
Files.newDirectoryStream(sitePaths.index_dir)) {
for (Path p : paths) {
String n = p.getFileName().toString();
if (!n.startsWith(prefix)) {
if (!n.startsWith(CHANGES_PREFIX)) {
continue;
}
String versionStr = n.substring(prefix.length());
String versionStr = n.substring(CHANGES_PREFIX.length());
Integer v = Ints.tryParse(versionStr);
if (v == null || versionStr.length() != 4) {
log.warn("Unrecognized version in index directory: {}",
@@ -274,7 +252,7 @@ public class LuceneVersionManager implements LifecycleListener {
continue;
}
if (!versions.containsKey(v)) {
versions.put(v, new Version<V>(null, v, true, getReady(cfg, v)));
versions.put(v, new Version(null, v, true, getReady(cfg, v)));
}
}
} catch (IOException e) {
@@ -283,10 +261,10 @@ public class LuceneVersionManager implements LifecycleListener {
return versions;
}
private <V> void markNotReady(FileBasedConfig cfg, Iterable<Version<V>> versions,
Collection<Version<V>> inUse) {
private void markNotReady(FileBasedConfig cfg, Iterable<Version> versions,
Collection<Version> inUse) {
boolean dirty = false;
for (Version<V> v : versions) {
for (Version v : versions) {
if (!inUse.contains(v) && v.exists) {
setReady(cfg, v.version, false);
dirty = true;