// 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.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;
@Current
private final Provider<SchemaVersion> version;
@Inject
public SchemaVersionCheck(SchemaFactory<ReviewDb> schemaFactory,
@Current Provider<SchemaVersion> version) {
this.schema = schemaFactory;
this.version = version;
}
public void start() {
try {
final ReviewDb db = schema.open();
try {
final CurrentSchemaVersion sVer = getSchemaVersion(db);
final int eVer = version.get().getVersionNbr();
if (sVer == null) {
throw new ProvisionException("Schema not yet initialized."
+ " Run init to initialize the schema.");
}
if (sVer.versionNbr != eVer) {
throw new ProvisionException("Unsupported schema version "
+ sVer.versionNbr + "; expected schema version " + eVer
+ ". Run init to upgrade.");
}
} 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;
}
}
}