/*
* Copyright 2010-2013 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.springframework.data.gemfire.process;
import static org.springframework.data.gemfire.util.ArrayUtils.nullSafeArray;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
import org.springframework.data.gemfire.test.support.FileSystemUtils;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
/**
* The {@link ProcessExecutor} class is a utility class for launching and running Java processes.
*
* @author John Blum
* @see java.io.File
* @see java.lang.Process
* @see java.lang.ProcessBuilder
* @see java.lang.System
* @see org.springframework.data.gemfire.process.ProcessConfiguration
* @see org.springframework.data.gemfire.process.ProcessWrapper
* @since 1.5.0
*/
@SuppressWarnings("unused")
public abstract class ProcessExecutor {
public static final File JAVA_EXE = new File(new File(FileSystemUtils.JAVA_HOME, "bin"), "java");
public static final String JAVA_CLASSPATH = System.getProperty("java.class.path");
protected static final String SPRING_GEMFIRE_SYSTEM_PROPERTY_PREFIX = "spring.gemfire.";
protected static final String SPRING_DATA_GEMFIRE_SYSTEM_PROPERTY_PREFIX = "spring.data.gemfire.";
public static ProcessWrapper launch(Class<?> type, String... args) throws IOException {
return launch(FileSystemUtils.WORKING_DIRECTORY, type, args);
}
public static ProcessWrapper launch(File workingDirectory, Class<?> type, String... args) throws IOException {
return launch(workingDirectory, JAVA_CLASSPATH, type, args);
}
public static ProcessWrapper launch(File workingDirectory, String classpath, Class<?> type, String... args)
throws IOException {
ProcessBuilder processBuilder = new ProcessBuilder()
.command(buildCommand(classpath, type, args))
.directory(validateDirectory(workingDirectory))
.redirectErrorStream(true);
Process process = processBuilder.start();
ProcessWrapper processWrapper = new ProcessWrapper(process, ProcessConfiguration.create(processBuilder));
processWrapper.register((input) -> System.err.printf("[FORK] - %s%n", input));
return processWrapper;
}
protected static String[] buildCommand(String classpath, Class<?> type, String... args) {
Assert.notNull(type, "The main Java class to launch must not be null");
List<String> command = new ArrayList<>();
List<String> programArguments = new ArrayList<>(args.length);
command.add(JAVA_EXE.getAbsolutePath());
command.add("-server");
command.add("-ea");
command.add("-classpath");
command.add(StringUtils.hasText(classpath) ? classpath : JAVA_CLASSPATH);
command.addAll(getSpringGemFireSystemProperties());
for (String arg : nullSafeArray(args, String.class)) {
if (isJvmOption(arg)) {
command.add(arg);
}
else if (!StringUtils.isEmpty(arg)) {
programArguments.add(arg);
}
}
command.add(type.getName());
command.addAll(programArguments);
return command.toArray(new String[command.size()]);
}
protected static Collection<? extends String> getSpringGemFireSystemProperties() {
return System.getProperties().stringPropertyNames().stream()
.filter(property -> property.startsWith(SPRING_DATA_GEMFIRE_SYSTEM_PROPERTY_PREFIX)
|| property.startsWith(SPRING_GEMFIRE_SYSTEM_PROPERTY_PREFIX))
.map(property -> String.format("-D%1$s=%2$s", property, System.getProperty(property)))
.collect(Collectors.toList());
}
protected static boolean isJvmOption(String option) {
return (StringUtils.hasText(option) && (option.startsWith("-D") || option.startsWith("-X")));
}
protected static File validateDirectory(File workingDirectory) {
Assert.isTrue(workingDirectory != null && (workingDirectory.isDirectory() || workingDirectory.mkdirs()),
String.format("Failed to create working directory [%s]", workingDirectory));
return workingDirectory;
}
}