opendev/gerrit
Code Issues Proposed changes

Rewrite our build as modular maven components

Browse Source 
This refactoring splits the code up into different components, with
their own per-component CLASSPATH.  By moving all of our classes
into isolated components we can better isolate the classpaths and
try to avoid unexpected dependency problems.  It also allows us to
more clearly define which components are used by the GWT UI and
thus must be compiled under GWT, and which components are run on
the server and can therefore use more of the J2SE API.

Change-Id: I833cc22bacc5655d1c9099ed7c2b0e0a5b08855a
Signed-off-by: Shawn O. Pearce <sop@google.com>
This commit is contained in:
Shawn O. Pearce
2009-11-07 12:55:26 -08:00
parent 2464ac82b7
commit 44671f5c69
719 changed files with 9467 additions and 2417 deletions
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gerrit-war/src/main/java/com/google/gerrit/httpd/WebAppInitializer.java Normal file
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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.httpd;
import static com.google.inject.Stage.PRODUCTION;
import com.google.gerrit.server.cache.CachePool;
import com.google.gerrit.server.config.CanonicalWebUrlModule;
import com.google.gerrit.server.config.DatabaseModule;
import com.google.gerrit.server.config.GerritGlobalModule;
import com.google.gerrit.server.git.PushAllProjectsOp;
import com.google.gerrit.server.git.ReloadSubmitQueueOp;
import com.google.gerrit.server.git.WorkQueue;
import com.google.gerrit.sshd.SshDaemon;
import com.google.gerrit.sshd.SshModule;
import com.google.gerrit.sshd.commands.MasterCommandModule;
import com.google.inject.ConfigurationException;
import com.google.inject.CreationException;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Module;
import com.google.inject.Provider;
import com.google.inject.ProvisionException;
import com.google.inject.servlet.GuiceServletContextListener;
import com.google.inject.spi.Message;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.TimeUnit;
import javax.servlet.ServletContextEvent;
import javax.servlet.http.HttpServletRequest;
import javax.sql.DataSource;
/** Configures the web application environment for Gerrit Code Review. */
public class WebAppInitializer extends GuiceServletContextListener {
private static final Logger log =
LoggerFactory.getLogger(WebAppInitializer.class);
private Injector dbInjector;
private Injector sysInjector;
private Injector webInjector;
private Injector sshInjector;
private synchronized void init() {
if (sysInjector == null) {
try {
dbInjector = Guice.createInjector(PRODUCTION, new DatabaseModule());
} catch (CreationException ce) {
final Message first = ce.getErrorMessages().iterator().next();
final StringBuilder buf = new StringBuilder();
buf.append(first.getMessage());
Throwable why = first.getCause();
while (why != null) {
buf.append("\n caused by ");
buf.append(why.toString());
why = why.getCause();
}
if (first.getCause() != null) {
buf.append("\n");
buf.append("\nResolve above errors before continuing.");
buf.append("\nComplete stack trace follows:");
}
log.error(buf.toString(), first.getCause());
throw new CreationException(Collections.singleton(first));
}
sysInjector =
GerritGlobalModule.createInjector(dbInjector,
new CanonicalWebUrlModule() {
@Override
protected Class<? extends Provider<String>> provider() {
return HttpCanonicalWebUrlProvider.class;
}
});
sshInjector = createSshInjector();
webInjector = createWebInjector();
// Push the Provider<HttpServletRequest> down into the canonical
// URL provider. Its optional for that provider, but since we can
// supply one we should do so, in case the administrator has not
// setup the canonical URL in the configuration file.
//
// Note we have to do this manually as Guice failed to do the
// injection here because the HTTP environment is not visible
// to the core server modules.
//
sysInjector.getInstance(HttpCanonicalWebUrlProvider.class)
.setHttpServletRequest(
webInjector.getProvider(HttpServletRequest.class));
}
}
private Injector createSshInjector() {
return sysInjector.createChildInjector(new SshModule(),
new MasterCommandModule());
}
private Injector createWebInjector() {
final List<Module> modules = new ArrayList<Module>();
modules.add(sshInjector.getInstance(WebModule.class));
return sysInjector.createChildInjector(modules);
}
@Override
protected Injector getInjector() {
init();
return webInjector;
}
@Override
public void contextInitialized(final ServletContextEvent event) {
super.contextInitialized(event);
init();
try {
sysInjector.getInstance(CachePool.class).start();
} catch (ConfigurationException e) {
log.error("Unable to start CachePool", e);
} catch (ProvisionException e) {
log.error("Unable to start CachePool", e);
}
try {
sysInjector.getInstance(PushAllProjectsOp.Factory.class).create(null)
.start(30, TimeUnit.SECONDS);
} catch (ConfigurationException e) {
log.error("Unable to restart replication queue", e);
} catch (ProvisionException e) {
log.error("Unable to restart replication queue", e);
}
try {
sysInjector.getInstance(ReloadSubmitQueueOp.Factory.class).create()
.start(15, TimeUnit.SECONDS);
} catch (ConfigurationException e) {
log.error("Unable to restart merge queue", e);
} catch (ProvisionException e) {
log.error("Unable to restart merge queue", e);
}
try {
sshInjector.getInstance(SshDaemon.class).start();
} catch (ConfigurationException e) {
log.error("Unable to start SSHD", e);
} catch (ProvisionException e) {
log.error("Unable to start SSHD", e);
} catch (IOException e) {
log.error("Unable to start SSHD", e);
}
}
@Override
public void contextDestroyed(final ServletContextEvent event) {
try {
if (sshInjector != null) {
sshInjector.getInstance(SshDaemon.class).stop();
}
} catch (ConfigurationException e) {
} catch (ProvisionException e) {
}
try {
if (sysInjector != null) {
sysInjector.getInstance(WorkQueue.class).shutdown();
}
} catch (ConfigurationException e) {
} catch (ProvisionException e) {
}
try {
if (sysInjector != null) {
sysInjector.getInstance(CachePool.class).stop();
}
} catch (ConfigurationException e) {
} catch (ProvisionException e) {
}
try {
if (dbInjector != null) {
closeDataSource(dbInjector.getInstance(DatabaseModule.DS));
}
} catch (ConfigurationException ce) {
} catch (ProvisionException ce) {
}
super.contextDestroyed(event);
}
private void closeDataSource(final DataSource ds) {
try {
Class<?> type = Class.forName("org.apache.commons.dbcp.BasicDataSource");
if (type.isInstance(ds)) {
type.getMethod("close").invoke(ds);
return;
}
} catch (Throwable bad) {
// Oh well, its not a Commons DBCP pooled connection.
}
try {
Class<?> type = Class.forName("com.mchange.v2.c3p0.DataSources");
if (type.isInstance(ds)) {
type.getMethod("destroy", DataSource.class).invoke(null, ds);
return;
}
} catch (Throwable bad) {
// Oh well, its not a c3p0 pooled connection.
}
}
}