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package mill.main.client;
import org.scalasbt.ipcsocket.*;
import java.io.*;
import java.net.Socket;
import java.net.URISyntaxException;
import java.net.URL;
import java.nio.channels.FileChannel;
import java.util.*;
public class Main {
static void initServer(String lockBase, boolean setJnaNoSys) throws IOException,URISyntaxException{
ArrayList<String> selfJars = new ArrayList<String>();
ClassLoader current = Main.class.getClassLoader();
while(current != null){
if (current instanceof java.net.URLClassLoader) {
URL[] urls = ((java.net.URLClassLoader) current).getURLs();
for (URL url: urls) {
selfJars.add(new File(url.toURI()).getCanonicalPath());
}
}
current = current.getParent();
}
if (Util.isJava9OrAbove) {
selfJars.addAll(Arrays.asList(System.getProperty("java.class.path").split(File.pathSeparator)));
}
ArrayList<String> l = new java.util.ArrayList<String>();
l.add("java");
Properties props = System.getProperties();
Iterator<String> keys = props.stringPropertyNames().iterator();
while(keys.hasNext()){
String k = keys.next();
if (k.startsWith("MILL_")) l.add("-D" + k + "=" + props.getProperty(k));
}
if (setJnaNoSys) {
l.add("-Djna.nosys=true");
}
l.add("-cp");
l.add(String.join(File.pathSeparator, selfJars));
l.add("mill.main.ServerMain");
l.add(lockBase);
new java.lang.ProcessBuilder()
.command(l)
.redirectOutput(new java.io.File(lockBase + "/logs"))
.redirectError(new java.io.File(lockBase + "/logs"))
.start();
}
public static void main(String[] args) throws Exception{
boolean setJnaNoSys = System.getProperty("jna.nosys") == null;
Map<String, String> env = System.getenv();
if (setJnaNoSys) {
System.setProperty("jna.nosys", "true");
}
int index = 0;
while (index < 5) {
index += 1;
String lockBase = "out/mill-worker-" + index;
new java.io.File(lockBase).mkdirs();
RandomAccessFile lockFile = new RandomAccessFile(lockBase + "/clientLock", "rw");
FileChannel channel = lockFile.getChannel();
java.nio.channels.FileLock tryLock = channel.tryLock();
if (tryLock == null) {
lockFile.close();
channel.close();
} else {
int exitCode = Main.run(
lockBase,
new Runnable() {
@Override
public void run() {
try{
initServer(lockBase, setJnaNoSys);
}catch(Exception e){
throw new RuntimeException(e);
}
}
},
Locks.files(lockBase),
System.in,
System.out,
System.err,
args,
env
);
System.exit(exitCode);
}
}
throw new Exception("Reached max process limit: " + 5);
}
public static int run(String lockBase,
Runnable initServer,
Locks locks,
InputStream stdin,
OutputStream stdout,
OutputStream stderr,
String[] args,
Map<String, String> env) throws Exception{
FileOutputStream f = new FileOutputStream(lockBase + "/run");
f.write(System.console() != null ? 1 : 0);
Util.writeString(f, System.getProperty("MILL_VERSION"));
Util.writeArgs(args, f);
Util.writeMap(env, f);
f.close();
boolean serverInit = false;
if (locks.processLock.probe()) {
serverInit = true;
initServer.run();
}
while(locks.processLock.probe()) Thread.sleep(3);
// Need to give sometime for Win32NamedPipeSocket to work
// if the server is just initialized
if (serverInit && Util.isWindows) Thread.sleep(1000);
Socket ioSocket = null;
long retryStart = System.currentTimeMillis();
while(ioSocket == null && System.currentTimeMillis() - retryStart < 1000){
try{
ioSocket = Util.isWindows?
new Win32NamedPipeSocket(Util.WIN32_PIPE_PREFIX + new File(lockBase).getName())
: new UnixDomainSocket(lockBase + "/io");
}catch(Throwable e){
Thread.sleep(1);
}
}
if (ioSocket == null){
throw new Exception("Failed to connect to server");
}
InputStream outErr = ioSocket.getInputStream();
OutputStream in = ioSocket.getOutputStream();
ClientOutputPumper outPump = new ClientOutputPumper(outErr, stdout, stderr);
InputPumper inPump = new InputPumper(stdin, in, true);
Thread outThread = new Thread(outPump);
outThread.setDaemon(true);
Thread inThread = new Thread(inPump);
inThread.setDaemon(true);
outThread.start();
inThread.start();
locks.serverLock.await();
try{
return Integer.parseInt(
new BufferedReader(
new InputStreamReader(
new FileInputStream(lockBase + "/exitCode")
)
).readLine()
);
} catch(Throwable e){
return 1;
}
}
}
class ClientOutputPumper implements Runnable{
private InputStream src;
private OutputStream dest1;
private OutputStream dest2;
public ClientOutputPumper(InputStream src, OutputStream dest1, OutputStream dest2){
this.src = src;
this.dest1 = dest1;
this.dest2 = dest2;
}
public void run() {
byte[] buffer = new byte[1024];
int state = 0;
boolean running = true;
boolean first = true;
while (running) {
try {
int n = src.read(buffer);
first = false;
if (n == -1) running = false;
else {
int i = 0;
while (i < n) {
switch (state) {
case 0:
state = buffer[i] + 1;
break;
case 1:
dest1.write(buffer[i]);
state = 0;
break;
case 2:
dest2.write(buffer[i]);
state = 0;
break;
}
i += 1;
}
dest1.flush();
dest2.flush();
}
} catch (IOException e) {
// Win32NamedPipeSocket input stream somehow doesn't return -1,
// instead it throws an IOException whose message contains "ReadFile()".
// However, if it throws an IOException before ever reading some bytes,
// it could not connect to the server, so exit.
if (Util.isWindows && e.getMessage().contains("ReadFile()")) {
if (first) {
System.err.println("Failed to connect to server");
System.exit(1);
} else running = false;
} else {
e.printStackTrace();
System.exit(1);
}
}
}
}
}
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