/*******************************************************************************
* Copyright 2011 Google Inc. All Rights Reserved.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* 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.gdt.eclipse.designer;
import com.google.gdt.eclipse.designer.hosted.IHostedModeSupport;
import com.google.gdt.eclipse.designer.hosted.IModuleDescription;
import com.google.gdt.eclipse.designer.util.ModuleDescription;
import com.google.gdt.eclipse.designer.util.Utils;
import org.eclipse.wb.internal.core.utils.Version;
import org.eclipse.wb.internal.core.utils.reflect.ReflectionUtils;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.osgi.framework.Bundle;
import java.lang.reflect.Constructor;
import java.util.List;
/**
* Performs warm up of GWT hosted mode.
*
* @author scheglov_ke
* @coverage gwt
*/
public class WarmUpSupport {
////////////////////////////////////////////////////////////////////////////
//
// Configuration
//
////////////////////////////////////////////////////////////////////////////
private static final boolean DEBUG = getBooleanProperty("gwtd.warmup.debug", false);
private static final boolean ENABLED = getBooleanProperty("gwtd.warmup.enabled", true);
private static final int MIN_CPU_NUMBER = getIntProperty("gwtd.warmup.mincpu", 2);
private static boolean getBooleanProperty(String name, boolean def) {
String s = System.getProperty(name);
return s != null ? "true".equals(s) : def;
}
private static int getIntProperty(String name, int def) {
String s = System.getProperty(name);
try {
return Integer.parseInt(s);
} catch (Throwable e) {
return def;
}
}
////////////////////////////////////////////////////////////////////////////
//
// Implementation
//
////////////////////////////////////////////////////////////////////////////
/**
* Performs warm up.
*/
public static void doWarmUp() {
// may be disabled manually
if (!ENABLED) {
return;
}
// may be not enough CPUs
if (Runtime.getRuntime().availableProcessors() < MIN_CPU_NUMBER) {
return;
}
// do warm up
warmUpHostedMode();
}
/**
* Initializes GWT 2.2 hosted mode using any existing GWT 2.2 project.
* <p>
* Gives <b>3</b> times speedup for first GWT editing opening in this Eclipse session.
*/
private static void warmUpHostedMode() {
try {
IProject[] projects = ResourcesPlugin.getWorkspace().getRoot().getProjects();
for (IProject project : projects) {
if (Utils.isGpeGwtProject(project)) {
Version version = Utils.getVersion(project);
if (version.isHigherOrSame(Utils.GWT_2_2)) {
IJavaProject javaProject = JavaCore.create(project);
List<ModuleDescription> modules = Utils.getModules(javaProject);
if (!modules.isEmpty()) {
ModuleDescription module = modules.get(0);
warmUpHostedMode(module);
warmUpHostedMode(module);
warmUpHostedMode(module);
}
break;
}
}
}
} catch (Throwable e) {
e.printStackTrace();
}
}
private static void warmUpHostedMode(ModuleDescription module) throws Exception {
long startTime = System.nanoTime();
Bundle hostedBundle = Platform.getBundle("com.google.gdt.eclipse.designer.hosted.2_2");
Class<?> hmsClass =
hostedBundle.loadClass("com.google.gdt.eclipse.designer.hosted.tdt.HostedModeSupport");
Constructor<?> hmsConstructor = hmsClass.getConstructor(IModuleDescription.class);
IHostedModeSupport hms = (IHostedModeSupport) hmsConstructor.newInstance(module);
//
try {
ReflectionUtils.invokeMethod(
hms,
"createModuleSpaceHost(java.lang.String)",
"com.google.gwt.user.User");
} finally {
hms.dispose();
}
if (DEBUG) {
System.out.println("startup time: " + (System.nanoTime() - startTime) / 1000000.0);
}
}
}