// 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 static com.google.gerrit.server.config.ConfigUtil.getEnum;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static java.util.concurrent.TimeUnit.SECONDS;
import com.google.gerrit.extensions.events.LifecycleListener;
import com.google.gerrit.server.config.ConfigUtil;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.config.SitePaths;
import com.google.gwtorm.jdbc.SimpleDataSource;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.ProvisionException;
import com.google.inject.Singleton;
import org.apache.commons.dbcp.BasicDataSource;
import org.eclipse.jgit.lib.Config;
import java.io.File;
import java.io.IOException;
import java.sql.SQLException;
import java.util.Properties;
import javax.sql.DataSource;
/** Provides access to the DataSource. */
@Singleton
public final class DataSourceProvider implements Provider<DataSource>,
LifecycleListener {
private final DataSource ds;
@Inject
DataSourceProvider(final SitePaths site,
@GerritServerConfig final Config cfg, Context ctx) {
ds = open(site, cfg, ctx);
}
@Override
public synchronized DataSource get() {
return ds;
}
@Override
public void start() {
}
@Override
public synchronized void stop() {
if (ds instanceof BasicDataSource) {
try {
((BasicDataSource) ds).close();
} catch (SQLException e) {
// Ignore the close failure.
}
}
}
public static enum Context {
SINGLE_USER, MULTI_USER;
}
public static enum Type {
H2, POSTGRESQL, MYSQL, JDBC;
}
private DataSource open(final SitePaths site, final Config cfg,
final Context context) {
Type type = getEnum(cfg, "database", null, "type", Type.values(), null);
String driver = optional(cfg, "driver");
String url = optional(cfg, "url");
String username = optional(cfg, "username");
String password = optional(cfg, "password");
if (url == null || url.isEmpty()) {
if (type == null) {
type = Type.H2;
}
switch (type) {
case H2: {
String database = optional(cfg, "database");
if (database == null || database.isEmpty()) {
database = "db/ReviewDB";
}
File db = site.resolve(database);
try {
db = db.getCanonicalFile();
} catch (IOException e) {
db = db.getAbsoluteFile();
}
url = "jdbc:h2:" + db.toURI().toString();
break;
}
case POSTGRESQL: {
final StringBuilder b = new StringBuilder();
b.append("jdbc:postgresql://");
b.append(hostname(optional(cfg, "hostname")));
b.append(port(optional(cfg, "port")));
b.append("/");
b.append(required(cfg, "database"));
url = b.toString();
break;
}
case MYSQL: {
final StringBuilder b = new StringBuilder();
b.append("jdbc:mysql://");
b.append(hostname(optional(cfg, "hostname")));
b.append(port(optional(cfg, "port")));
b.append("/");
b.append(required(cfg, "database"));
url = b.toString();
break;
}
case JDBC:
driver = required(cfg, "driver");
url = required(cfg, "url");
break;
default:
throw new IllegalArgumentException(type + " not supported");
}
}
if (driver == null || driver.isEmpty()) {
if (url.startsWith("jdbc:h2:")) {
driver = "org.h2.Driver";
} else if (url.startsWith("jdbc:postgresql:")) {
driver = "org.postgresql.Driver";
} else if (url.startsWith("jdbc:mysql:")) {
driver = "com.mysql.jdbc.Driver";
} else {
throw new IllegalArgumentException("database.driver must be set");
}
}
boolean usePool;
if (url.startsWith("jdbc:mysql:")) {
// MySQL has given us trouble with the connection pool,
// sometimes the backend disconnects and the pool winds
// up with a stale connection. Fortunately opening up
// a new MySQL connection is usually very fast.
//
usePool = false;
} else {
usePool = true;
}
usePool = cfg.getBoolean("database", "connectionpool", usePool);
if (context == Context.SINGLE_USER) {
usePool = false;
}
if (usePool) {
final BasicDataSource ds = new BasicDataSource();
ds.setDriverClassName(driver);
ds.setUrl(url);
if (username != null && !username.isEmpty()) {
ds.setUsername(username);
}
if (password != null && !password.isEmpty()) {
ds.setPassword(password);
}
ds.setMaxActive(cfg.getInt("database", "poollimit", 8));
ds.setMinIdle(cfg.getInt("database", "poolminidle", 4));
ds.setMaxIdle(cfg.getInt("database", "poolmaxidle", 4));
ds.setMaxWait(ConfigUtil.getTimeUnit(cfg, "database", null,
"poolmaxwait", MILLISECONDS.convert(30, SECONDS), MILLISECONDS));
ds.setInitialSize(ds.getMinIdle());
return ds;
} else {
// Don't use the connection pool.
//
try {
final Properties p = new Properties();
p.setProperty("driver", driver);
p.setProperty("url", url);
if (username != null) {
p.setProperty("user", username);
}
if (password != null) {
p.setProperty("password", password);
}
return new SimpleDataSource(p);
} catch (SQLException se) {
throw new ProvisionException("Database unavailable", se);
}
}
}
private static String hostname(String hostname) {
if (hostname == null || hostname.isEmpty()) {
hostname = "localhost";
} else if (hostname.contains(":") && !hostname.startsWith("[")) {
hostname = "[" + hostname + "]";
}
return hostname;
}
private static String port(String port) {
if (port != null && !port.isEmpty()) {
return ":" + port;
}
return "";
}
private static String optional(final Config config, final String name) {
return config.getString("database", null, name);
}
private static String required(final Config config, final String name) {
final String v = optional(config, name);
if (v == null || "".equals(v)) {
throw new IllegalArgumentException("No database." + name + " configured");
}
return v;
}
}