com.google.gerrit.server.index.SingleVersionModule Maven / Gradle / Ivy
// 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 com.google.common.collect.ImmutableSet;
import com.google.gerrit.extensions.events.LifecycleListener;
import com.google.gerrit.index.Index;
import com.google.gerrit.index.IndexDefinition;
import com.google.gerrit.index.Schema;
import com.google.gerrit.lifecycle.LifecycleModule;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.inject.Inject;
import com.google.inject.ProvisionException;
import com.google.inject.Singleton;
import com.google.inject.TypeLiteral;
import com.google.inject.name.Named;
import com.google.inject.name.Names;
import com.google.inject.util.Providers;
import java.util.Collection;
import java.util.Map;
import java.util.Set;
import org.eclipse.jgit.lib.Config;
/**
* Module that installs a listener to Gerrit's lifecycle events to specify which index versions to
* use.
*/
@Singleton
public class SingleVersionModule extends LifecycleModule {
public static final String SINGLE_VERSIONS = "IndexModule/SingleVersions";
private final Map singleVersions;
public SingleVersionModule(Map singleVersions) {
this.singleVersions = singleVersions;
}
@Override
public void configure() {
listener().to(SingleVersionListener.class);
bind(new TypeLiteral>() {})
.annotatedWith(Names.named(SINGLE_VERSIONS))
.toProvider(Providers.of(singleVersions));
}
/** Listener to Gerrit's lifecycle events to specify which index versions to use. */
@Singleton
public static class SingleVersionListener implements LifecycleListener {
private final Set disabled;
private final Collection> defs;
private final Map singleVersions;
@Inject
SingleVersionListener(
@GerritServerConfig Config cfg,
Collection> defs,
@Named(SINGLE_VERSIONS) Map singleVersions) {
this.defs = defs;
this.singleVersions = singleVersions;
disabled = ImmutableSet.copyOf(cfg.getStringList("index", null, "testDisable"));
}
@Override
public void start() {
for (IndexDefinition def : defs) {
start(def);
}
}
private > void start(IndexDefinition def) {
if (disabled.contains(def.getName())) {
return;
}
Schema schema;
Integer v = singleVersions.get(def.getName());
if (v == null) {
schema = def.getLatest();
} else {
schema = def.getSchemas().get(v);
if (schema == null) {
throw new ProvisionException(
String.format("Unrecognized %s schema version: %s", def.getName(), v));
}
}
I index = def.getIndexFactory().create(schema);
def.getIndexCollection().setSearchIndex(index);
def.getIndexCollection().addWriteIndex(index);
}
@Override
public void stop() {
// Do nothing; indexes are closed by IndexCollection.
}
}
}