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// 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.testutil;
import com.google.gerrit.reviewdb.CurrentSchemaVersion;
import com.google.gerrit.reviewdb.ReviewDb;
import com.google.gerrit.reviewdb.SystemConfig;
import com.google.gerrit.server.config.SystemConfigProvider;
import com.google.gerrit.server.schema.Current;
import com.google.gerrit.server.schema.SchemaCreator;
import com.google.gerrit.server.schema.SchemaVersion;
import com.google.gwtorm.client.OrmException;
import com.google.gwtorm.client.SchemaFactory;
import com.google.gwtorm.jdbc.Database;
import com.google.gwtorm.jdbc.SimpleDataSource;
import com.google.inject.Guice;
import com.google.inject.Key;
import com.google.inject.Provider;
import junit.framework.TestCase;
import java.io.File;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;
import javax.sql.DataSource;
/**
* An in-memory test instance of {@link ReviewDb} database.
* <p>
* Test classes should create one instance of this class for each unique test
* database they want to use. When the tests needing this instance are complete,
* ensure that {@link #drop(InMemoryDatabase)} is called to free the resources so
* the JVM running the unit tests doesn't run out of heap space.
*/
public class InMemoryDatabase implements SchemaFactory<ReviewDb> {
private static int dbCnt;
private static synchronized DataSource newDataSource() throws SQLException {
final Properties p = new Properties();
p.setProperty("driver", org.h2.Driver.class.getName());
p.setProperty("url", "jdbc:h2:mem:" + "Test_" + (++dbCnt));
final DataSource dataSource = new SimpleDataSource(p);
return dataSource;
}
/** Drop the database from memory; does nothing if the instance was null. */
public static void drop(final InMemoryDatabase db) {
if (db != null) {
db.drop();
}
}
private Connection openHandle;
private Database<ReviewDb> database;
private boolean created;
private SchemaVersion schemaVersion;
public InMemoryDatabase() throws OrmException {
try {
final DataSource dataSource = newDataSource();
// Open one connection. This will peg the database into memory
// until someone calls drop on us, allowing subsequent connections
// opened against the same URL to go to the same set of tables.
//
openHandle = dataSource.getConnection();
// Build the access layer around the connection factory.
//
database = new Database<ReviewDb>(dataSource, ReviewDb.class);
schemaVersion =
Guice.createInjector(new SchemaVersion.Module()).getBinding(
Key.get(SchemaVersion.class, Current.class)).getProvider().get();
} catch (SQLException e) {
throw new OrmException(e);
}
}
public Database<ReviewDb> getDatabase() {
return database;
}
@Override
public ReviewDb open() throws OrmException {
return getDatabase().open();
}
/** Ensure the database schema has been created and initialized. */
public InMemoryDatabase create() throws OrmException {
if (!created) {
created = true;
final ReviewDb c = open();
try {
new SchemaCreator(new File("."), schemaVersion).create(c);
} finally {
c.close();
}
}
return this;
}
/** Drop this database from memory so it no longer exists. */
public void drop() {
if (openHandle != null) {
try {
openHandle.close();
} catch (SQLException e) {
System.err.println("WARNING: Cannot close database connection");
e.printStackTrace(System.err);
}
openHandle = null;
database = null;
}
}
public SystemConfig getSystemConfig() {
return new SystemConfigProvider(this, new Provider<SchemaVersion>() {
public SchemaVersion get() {
return schemaVersion;
}
}).get();
}
public CurrentSchemaVersion getSchemaVersion() throws OrmException {
final ReviewDb c = open();
try {
return c.schemaVersion().get(new CurrentSchemaVersion.Key());
} finally {
c.close();
}
}
public void assertSchemaVersion() throws OrmException {
final CurrentSchemaVersion act = getSchemaVersion();
TestCase.assertEquals(schemaVersion.getVersionNbr(), act.versionNbr);
}
}
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