com.google.gerrit.server.config.RequestScopedReviewDbProvider Maven / Gradle / Ivy
// 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.config;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.RequestCleanup;
import com.google.gwtorm.server.OrmException;
import com.google.gwtorm.server.SchemaFactory;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.ProvisionException;
import com.google.inject.servlet.RequestScoped;
/** Provides {@link ReviewDb} database handle live only for this request. */
@RequestScoped
public class RequestScopedReviewDbProvider implements Provider {
private final SchemaFactory schema;
private final Provider cleanup;
private ReviewDb db;
@Inject
public RequestScopedReviewDbProvider(
final SchemaFactory schema, Provider cleanup) {
this.schema = schema;
this.cleanup = cleanup;
}
@SuppressWarnings("resource")
@Override
public ReviewDb get() {
if (db == null) {
ReviewDb c;
try {
c = schema.open();
} catch (OrmException e) {
throw new ProvisionException("Cannot open ReviewDb", e);
}
try {
cleanup
.get()
.add(
() -> {
c.close();
db = null;
});
} catch (Throwable e) {
c.close();
throw new ProvisionException("Cannot defer cleanup of ReviewDb", e);
}
db = c;
}
return db;
}
}