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GameStarter.java
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/
GameStarter.java
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/*
* Copyright 2016 MovingBlocks
*
* 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.terasology.launcher.game;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.terasology.launcher.util.JavaHeapSize;
import org.terasology.launcher.util.LogLevel;
import java.io.IOException;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
public final class GameStarter {
private static final Logger logger = LoggerFactory.getLogger(GameStarter.class);
private static final int PROCESS_START_SLEEP_TIME = 5000;
private Thread gameThread;
public GameStarter() {
}
public boolean isRunning() {
return gameThread != null && gameThread.isAlive();
}
public void dispose() {
if (gameThread != null) {
gameThread.interrupt();
}
gameThread = null;
}
public boolean startGame(TerasologyGameVersion gameVersion, Path gameDataDirectory, JavaHeapSize maxHeapSize,
JavaHeapSize initialHeapSize, List<String> userJavaParameters, List<String> userGameParameters, LogLevel logLevel) {
if (isRunning()) {
logger.warn("The game can not be started because another game is already running! '{}'", gameThread);
return false;
}
final List<String> javaParameters = createJavaParameters(maxHeapSize, initialHeapSize, userJavaParameters, logLevel);
final List<String> processParameters = createProcessParameters(gameVersion, gameDataDirectory, javaParameters, userGameParameters);
return startProcess(gameVersion, processParameters);
}
private List<String> createJavaParameters(JavaHeapSize maxHeapSize, JavaHeapSize initialHeapSize, List<String> userJavaParameters, LogLevel logLevel) {
final List<String> javaParameters = new ArrayList<>();
if (initialHeapSize.isUsed()) {
javaParameters.add("-Xms" + initialHeapSize.getSizeParameter());
}
if (maxHeapSize.isUsed()) {
javaParameters.add("-Xmx" + maxHeapSize.getSizeParameter());
}
if (!logLevel.isDefault()) {
javaParameters.add("-DlogOverrideLevel=" + logLevel.name());
}
javaParameters.addAll(userJavaParameters);
return javaParameters;
}
private List<String> createProcessParameters(TerasologyGameVersion gameVersion, Path gameDataDirectory, List<String> javaParameters,
List<String> gameParameters) {
final List<String> processParameters = new ArrayList<>();
processParameters.add(System.getProperty("java.home") + "/bin/java"); // Use the current java
processParameters.addAll(javaParameters);
processParameters.add("-jar");
processParameters.add(gameVersion.getGameJar().getFileName().toString());
processParameters.add("-homedir=" + gameDataDirectory.toAbsolutePath().toString());
processParameters.addAll(gameParameters);
return processParameters;
}
private boolean startProcess(TerasologyGameVersion gameVersion, List<String> processParameters) {
final ProcessBuilder pb = new ProcessBuilder(processParameters);
pb.redirectErrorStream(true);
pb.directory(gameVersion.getInstallationPath().toFile());
logger.debug("Starting game process with '{}' in '{}' for '{}'", processParameters, gameVersion.getInstallationPath(), gameVersion);
try {
final Process p = pb.start();
gameThread = new Thread(new GameRunner(p));
gameThread.setName("game" + gameVersion.getBuildNumber());
gameThread.start();
Thread.sleep(PROCESS_START_SLEEP_TIME);
if (!gameThread.isAlive()) {
final int exitValue = p.waitFor();
logger.warn("The game was stopped early. It returns with the exit value '{}'.", exitValue);
return false;
} else {
logger.info("The game is successfully launched.");
}
} catch (InterruptedException | IOException | RuntimeException e) {
logger.error("The game could not be started due to an error! Parameters '{}' for '{}'!", processParameters, gameVersion, e);
return false;
}
return true;
}
}