/*
* Copyright 2012 the original author or authors.
*
* 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 org.gradle.launcher.daemon.configuration;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import org.gradle.api.internal.file.IdentityFileResolver;
import org.gradle.internal.jvm.Jvm;
import org.gradle.process.internal.JvmOptions;
import java.io.File;
import java.lang.management.ManagementFactory;
import java.util.List;
import java.util.Properties;
public class CurrentProcess {
private final File javaHome;
private final JvmOptions effectiveJvmOptions;
public CurrentProcess() {
this(Jvm.current().getJavaHome(), inferJvmOptions());
}
public CurrentProcess(File javaHome, JvmOptions effectiveJvmOptions) {
this.javaHome = javaHome;
this.effectiveJvmOptions = effectiveJvmOptions;
}
public JvmOptions getJvmOptions() {
return effectiveJvmOptions;
}
public File getJavaHome() {
return javaHome;
}
/**
* Attempts to configure the current process to run with the required build parameters.
* @return True if the current process could be configured, false otherwise.
*/
public boolean configureForBuild(DaemonParameters requiredBuildParameters) {
boolean javaHomeMatch = getJavaHome().equals(requiredBuildParameters.getEffectiveJavaHome());
List<String> currentImmutable = new JvmOptions(new IdentityFileResolver()).getAllImmutableJvmArgs();
List<String> requiredImmutable = requiredBuildParameters.getEffectiveJvmArgs();
List<String> requiredImmutableMinusDefaults = removeDefaults(requiredImmutable);
boolean noImmutableJvmArgsRequired = requiredImmutableMinusDefaults.equals(currentImmutable);
if (javaHomeMatch && noImmutableJvmArgsRequired) {
// Set the system properties and use this process
Properties properties = new Properties();
properties.putAll(requiredBuildParameters.getEffectiveSystemProperties());
System.setProperties(properties);
return true;
}
return false;
}
private List<String> removeDefaults(List<String> effectiveJvmArgs) {
return Lists.newArrayList(Iterables.filter(effectiveJvmArgs, new Predicate<String>() {
public boolean apply(String input) {
return !DaemonParameters.DEFAULT_JVM_ARGS.contains(input);
}
}));
}
private static JvmOptions inferJvmOptions() {
// Try to infer the effective jvm options for the currently running process.
// We only care about 'managed' jvm args, anything else is unimportant to the running build
JvmOptions jvmOptions = new JvmOptions(new IdentityFileResolver());
jvmOptions.setAllJvmArgs(ManagementFactory.getRuntimeMXBean().getInputArguments());
return jvmOptions;
}
}