| // Copyright (C) 2009 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.schema; |
| |
| import com.google.gerrit.extensions.events.LifecycleListener; |
| import com.google.gerrit.lifecycle.LifecycleModule; |
| import com.google.gerrit.reviewdb.client.CurrentSchemaVersion; |
| import com.google.gerrit.reviewdb.server.ReviewDb; |
| import com.google.gerrit.server.config.SitePaths; |
| import com.google.gwtorm.server.OrmException; |
| import com.google.gwtorm.server.SchemaFactory; |
| import com.google.inject.Inject; |
| import com.google.inject.Module; |
| import com.google.inject.Provider; |
| import com.google.inject.ProvisionException; |
| |
| /** Validates the current schema version. */ |
| public class SchemaVersionCheck implements LifecycleListener { |
| public static Module module () { |
| return new LifecycleModule() { |
| @Override |
| protected void configure() { |
| listener().to(SchemaVersionCheck.class); |
| } |
| }; |
| } |
| |
| private final SchemaFactory<ReviewDb> schema; |
| private final SitePaths site; |
| |
| @Current |
| private final Provider<SchemaVersion> version; |
| |
| @Inject |
| public SchemaVersionCheck(SchemaFactory<ReviewDb> schemaFactory, |
| final SitePaths site, |
| @Current Provider<SchemaVersion> version) { |
| this.schema = schemaFactory; |
| this.site = site; |
| this.version = version; |
| } |
| |
| public void start() { |
| try { |
| final ReviewDb db = schema.open(); |
| try { |
| final CurrentSchemaVersion currentVer = getSchemaVersion(db); |
| final int expectedVer = version.get().getVersionNbr(); |
| |
| if (currentVer == null) { |
| throw new ProvisionException("Schema not yet initialized." |
| + " Run init to initialize the schema:\n" |
| + "$ java -jar gerrit.war init -d " |
| + site.site_path.getAbsolutePath()); |
| } |
| if (currentVer.versionNbr < expectedVer) { |
| throw new ProvisionException("Unsupported schema version " |
| + currentVer.versionNbr + "; expected schema version " + expectedVer |
| + ". Run init to upgrade:\n" |
| + "$ java -jar " + site.gerrit_war.getAbsolutePath() + " init -d " |
| + site.site_path.getAbsolutePath()); |
| } else if (currentVer.versionNbr > expectedVer) { |
| throw new ProvisionException("Unsupported schema version " |
| + currentVer.versionNbr + "; expected schema version " + expectedVer |
| + ". Downgrade is not supported."); |
| } |
| } finally { |
| db.close(); |
| } |
| } catch (OrmException e) { |
| throw new ProvisionException("Cannot read schema_version", e); |
| } |
| } |
| |
| public void stop() { |
| } |
| |
| private CurrentSchemaVersion getSchemaVersion(final ReviewDb db) { |
| try { |
| return db.schemaVersion().get(new CurrentSchemaVersion.Key()); |
| } catch (OrmException e) { |
| return null; |
| } |
| } |
| } |