I need to execute a command in my java program but after executing the command , it required another parameter ( a password in my case ). how can I manage the output process of Runtime.getRuntime().exec() to accept parameter for further execution ?
I tried new BufferedWriter(new OutputStreamWriter(signingProcess.getOutputStream())).write("123456"); but it did not work.
Does your program not feature a --password option ? Normally all command line based programs do, mainly for scripts.
Runtime.getRuntime().exec(new String[]{"your-program", "--password="+pwd, "some-more-options"});
Or the more complicated way and much more error-prone:
try {
final Process process = Runtime.getRuntime().exec(
new String[] { "your-program", "some-more-parameters" });
if (process != null) {
new Thread(new Runnable() {
#Override
public void run() {
try {
DataInputStream in = new DataInputStream(
process.getInputStream());
BufferedReader br = new BufferedReader(
new InputStreamReader(in));
String line;
while ((line = br.readLine()) != null) {
// handle input here ... ->
// if(line.equals("Enter Password:")) { ... }
}
in.close();
} catch (Exception e) {
// handle exception here ...
}
}
}).start();
}
process.waitFor();
if (process.exitValue() == 0) {
// process exited ...
} else {
// process failed ...
}
} catch (Exception ex) {
// handle exception
}
This sample opens a new thread (keep in mind concurrency and synchronisation) that's going to read the output of your process. Similar you can feed your process with input as long as it has not terminated:
if (process != null) {
new Thread(new Runnable() {
#Override
public void run() {
try {
DataOutputStream out = new DataOutputStream(
process.getOutputStream());
BufferedWriter bw = new BufferedWriter(
new OutputStreamWriter(out));
bw.write("feed your process with data ...");
bw.write("feed your process with data ...");
out.close();
} catch (Exception e) {
// handle exception here ...
}
}
}).start();
}
Hope this helps.
Runtime r=Runtime.getRuntime();
process p=r.exec("your string");
try this way
You should give in parameter your windows command if you work on windows
visit this link for more details : http://docs.oracle.com/javase/6/docs/api/java/lang/Runtime.html
Related
This question already has answers here:
Behavior of Java sockets when closing output stream
(2 answers)
Closed 4 years ago.
I need help with process outputs.
I working on a Process console, and if I write to process output, I need to close to write. If I want to send another command, I get "Stream closed" error. Can anyone help me?
Sources:
public void runServer(String servername) throws InterruptedException{
try {
//ProcessBuilder builder = new ProcessBuilder("cmd", "/c", "start && cmd.exe && cd \""+cm.getDataPath("server")+"\\"+servername+"\\\" && java -jar \""+cm.getDataPath("main")+"\\serverfiles\\"+getServerFile(servername)+"\"");
ProcessBuilder builder = new ProcessBuilder("cmd", "/c", ""+cm.getDataPath("main")+"\\run.bat "+cm.getDataPath("server")+"\\"+servername+"\\ "+cm.getDataPath("main")+"\\serverfiles\\"+getServerFile(servername)+"\"");
final Process process = builder.start(); /*Runtime.getRuntime().exec("cmd.exe /c START "+cm.getDataPath("main")+"\\run.bat "+cm.getDataPath("server")+"\\"+servername+"\\ "+cm.getDataPath("main")+"\\serverfiles\\"+getServerFile(servername)+"\"");*/
final Thread ioThread = new Thread() {
#Override
public void run() {
try {
writer = new BufferedWriter(new OutputStreamWriter(process.getOutputStream()));
final BufferedReader reader = new BufferedReader(
new InputStreamReader(process.getInputStream()));
String line = null;
while ((line = reader.readLine()) != null) {
w.printConsole(line+"\n");
}
reader.close();
} catch (final Exception e) {
e.printStackTrace();
}
}
};
ioThread.start();
//process.waitFor();
runningserver = process;
} catch (IOException ex) {
Logger.getLogger(MainClass.class.getName()).log(Level.SEVERE, null, ex);
}
}
public void sendCommand(String command){
writer = new BufferedWriter(new OutputStreamWriter(runningserver.getOutputStream()));
try {
writer.append(command);
writer.flush();
writer.close();
} catch (IOException ex) {
Logger.getLogger(MainClass.class.getName()).log(Level.SEVERE, null, ex);
}
}
Every time you call sendCommand(...) you close a BufferedWriter that is wrapped around your server's OutputStream via writer.close();, and this also closes the stream. Don't do this as this prevents you from using this same stream again. In fact, your sendCommand method should re-use a writer field and your code should only close the writer when totally done with the stream.
I try to download folders from Google storage on the cloud.
I run from a process of a user that have permissions (when i run from regular terminal on mac it works)
I have this code:
public void runCommand() {
final Process p;
try {
p = Runtime.getRuntime().exec(
"gsutil -m cp -r gs://my_bucket/705/201609040613/output/html_pages file:/Users/eladb/WorkspaceQa/GsClient/build/resources/main/downloads/");
new Thread(new Runnable() {
public void run() {
BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = null;
try {
while ((line = input.readLine()) != null)
System.out.println(line);
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
p.waitFor();
} catch (Exception e) {
e.printStackTrace();
}
}
but the new thread never returns.
stuck on line:
while ((line = input.readLine()) != null)
Is there any way to download these folders from google cloud otherwise?
This manual copying of stdout data is error prone (you would have to forcefully close the stream to terminate the sub thread) and thankfully, unnecessary since Java 7:
public void runCommand() {
try {
new ProcessBuilder("gsutil", "-m", "cp", "-r",
"gs://my_bucket/705/201609040613/output/html_pages",
"file:/Users/eladb/WorkspaceQa/GsClient/build/resources/main/downloads/")
.inheritIO()
.start()
.waitFor();
} catch(IOException | InterruptedException e) {
e.printStackTrace();
}
}
If you don’t want to direct all three channels this way, see redirectOutput(File), redirectOutput(ProcessBuilder.Redirect), and the similar methods for input and error channel.
Only the (default) mode ProcessBuilder.Redirect.PIPE requires you to provide input or receive output while the sub-process is runnig.
I was trying to get the logcat content into a JTextPane. I used following code hoping it will return the content as String but it freeze and also, doesn't produce an error.
Process exec = null;
try {
exec = Runtime.getRuntime().exec("adb logcat -d");
InputStream errorStream = exec.getErrorStream();
BufferedReader ebr = new BufferedReader(new InputStreamReader(errorStream));
String errorLine;
while ((errorLine = ebr.readLine()) != null) {
System.out.println("[ERROR] :- " + errorLine);
}
if (exec.waitFor() == 0) {
InputStream infoStream = exec.getInputStream();
InputStreamReader isr = new InputStreamReader(infoStream);
BufferedReader ibr = new BufferedReader(isr);
String infoLine;
while ((infoLine = ibr.readLine()) != null) {
System.out.println("[INFO] :- " + infoLine);
}
}
} catch (IOException | InterruptedException ex) {
ex.printStackTrace();
} finally {
if (exec != null) {
exec.destroy();
}
}
I referred to some tutorials but, they were not filling my problem. Is this wrong? Are there any other methods to get the logcat content as a String programmatically? Sorry if this is a dumb question.
The issue you're seeing is that you're trying to process command streams and wait for the executing process, all in the same thread. It's blocking because the process reading the streams is waiting on the process and you're losing the stream input.
What you'll want to do is implement the function that reads/processes the command output (input stream) in another thread and kick off that thread when you start the process.
Second, you'll probably want to use ProcessBuilder rather than Runtime.exec.
Something like this can be adapted to do what you want:
public class Test {
public static void main(String[] args) throws Exception {
String startDir = System.getProperty("user.dir"); // start in current dir (change if needed)
ProcessBuilder pb = new ProcessBuilder("adb","logcat","-d");
pb.directory(new File(startDir)); // start directory
pb.redirectErrorStream(true); // redirect the error stream to stdout
Process p = pb.start(); // start the process
// start a new thread to handle the stream input
new Thread(new ProcessTestRunnable(p)).start();
p.waitFor(); // wait if needed
}
// mimics stream gobbler, but allows user to process the result
static class ProcessTestRunnable implements Runnable {
Process p;
BufferedReader br;
ProcessTestRunnable(Process p) {
this.p = p;
}
public void run() {
try {
InputStreamReader isr = new InputStreamReader(p.getInputStream());
br = new BufferedReader(isr);
String line = null;
while ((line = br.readLine()) != null)
{
// do something with the output here...
}
}
catch (IOException ex) {
ex.printStackTrace();
}
}
}
}
I'm fairly new to ProcessBuilder and working with threads. In it's current state I have a J-Button which starts a scheduled executor service. The scheduled executor service is used to delegate a process to one of two process builders. The application is meant to record a user conversation. During the conversation, after x minutes it creates a wav and delegates it to an available process for transcription. The problem begins when the transcription class is called. The process is started and the application runs as expected. However, the transcription process doesn't actually do anything until I exit the parent application. Only then it will begin. Checking the task manager it shows as a process but uses 0.0% of the CPU and around 238MB of memory until I exit then the two processes jump to 30%-40% and 500-1000 MB of memory. Also, I am using the .waitFor() but am using a thread to run the .waitFor() process as from what I gather it causes the application to hang. How would I go about fixing this. Sorry I am unable to provide more details but I'm new to this. Thanks in advance!
public class TranDelegator {
Future<?> futureTranOne = null;
Future<?> futureTranTwo = null;
ExecutorService transcriberOne = Executors.newFixedThreadPool(1);
ExecutorService transcriberTwo = Executors.newFixedThreadPool(1);
final Runnable transcribeChecker = new Runnable() {
public void run() {
String currentWav = null;
File inputFile = new File("C:\\convoLists/unTranscribed.txt");
BufferedReader reader = null;
try {
reader = new BufferedReader(new FileReader(inputFile));
} catch (FileNotFoundException e1) {
System.out.println("reader didn't initialize");
e1.printStackTrace();
}
try {
currentWav = reader.readLine();
} catch (IOException e) {
System.out.println("currentWav string issue");
e.printStackTrace();
}
try {
reader.close();
} catch (IOException e) {
System.out.println("reader couldn't close");
e.printStackTrace();
}
if(currentWav != null){
if (futureTranOne == null || futureTranOne.isDone()) {
futureTranOne = transcriberOne.submit((transcriptorOne));
}
else if (futureTranTwo == null || futureTranTwo.isDone()) {
futureTranTwo = transcriberTwo.submit((transcriptorTwo));
}
}
}
};
final Runnable transcriptorOne = new Runnable() {
public void run() {
System.out.println("ONE");
try {
String classpath = System.getProperty("java.class.path");
String path = "C:/Program Files/Java/jre7/bin/java.exe";
ProcessBuilder processBuilder = new ProcessBuilder(path, "-cp",
classpath, Transcriber.class.getName());
Process process = processBuilder.start();
try {
process.waitFor();
} catch (InterruptedException e) {
System.out.println("process.waitFor call failed");
e.printStackTrace();
}
} catch (IOException e) {
System.out.println("Unable to call transcribeConvo");
e.printStackTrace();
}
}
};
final Runnable transcriptorTwo = new Runnable() {
public void run() {
System.out.println("TWO");
try {
String classpath = System.getProperty("java.class.path");
String path = "C:/Program Files/Java/jre7/bin/java.exe";
ProcessBuilder processBuilder = new ProcessBuilder(path, "-cp",
classpath, Transcriber.class.getName());
Process process = processBuilder.start();
try {
process.waitFor();
} catch (InterruptedException e) {
System.out.println("process.waitFor call failed");
e.printStackTrace();
}
} catch (IOException e) {
System.out.println("Unable to call transcribeConvo");
e.printStackTrace();
}
}
};
}
public class Transcriber {
public static void main(String[] args) throws IOException,
UnsupportedAudioFileException {
retreiveEmpInfo();
TextoArray saveConvo = new TextoArray();
ArrayList<String> entireConvo = new ArrayList();
URL audioURL;
String currentWav = wavFinder();
ConfigReader configuration = new ConfigReader();
ArrayList<String> serverInfo = configuration
.readFromDoc("serverconfig");
while (currentWav != null) {
audioURL = new URL("file:///" + currentWav);
URL configURL = Transcriber.class.getResource("config.xml");
ConfigurationManager cm = new ConfigurationManager(configURL);
Recognizer recognizer = (Recognizer) cm.lookup("recognizer");
recognizer.allocate(); // allocate the resource necessary for the
// recognizer
System.out.println(configURL);
// configure the audio input for the recognizer
AudioFileDataSource dataSource = (AudioFileDataSource) cm
.lookup("audioFileDataSource");
dataSource.setAudioFile(audioURL, null);
// Loop until last utterance in the audio file has been decoded, in
// which case the recognizer will return null.
Result result;
while ((result = recognizer.recognize()) != null) {
String resultText = result.getBestResultNoFiller();
// System.out.println(result.toString());
Collections.addAll(entireConvo, resultText.split(" "));
}
new File(currentWav).delete();
saveConvo.Indexbuilder(serverInfo, entireConvo);
entireConvo.clear();
currentWav = wavFinder();
}
System.exit(0);
}
private static String wavFinder() throws IOException {
String currentWav = null;
int x = 1;
File inputFile = new File("C:\\convoLists/unTranscribed.txt");
File tempFile = new File("C:\\convoLists/unTranscribedtemp.txt");
BufferedReader reader = new BufferedReader(new FileReader(inputFile));
BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));
String currentLine = null;
String newLine = System.getProperty("line.separator");
while ((currentLine = reader.readLine()) != null) {
if (x == 1) {
currentWav = currentLine;
} else {
writer.write(currentLine);
writer.write(newLine);
}
x = 2;
}
reader.close();
writer.flush();
writer.close();
inputFile.delete();
// boolean successful =
tempFile.renameTo(inputFile);
// System.out.println("Success: " + successful);
// System.out.println("currentWav = " + currentWav);
return currentWav;
}
private static void retreiveEmpInfo() throws IOException {
File tempFile = new File("C:\\convoLists/tmp.txt");
BufferedReader reader = new BufferedReader(new FileReader(tempFile));
CurrentEmployeeInfo.setName(reader.readLine());
CurrentEmployeeInfo.setUserEmail(reader.readLine());
CurrentEmployeeInfo.setManagerEmail(reader.readLine());
reader.close();
}
}
This problem may be related to sub-process's input stream buffers.
You should clear the sub-process's input stream buffers.
These stream buffers got increased within the parent process's memory with time and at some moment your sub-process will stop responding.
There are few options to make sub-process work normally
Read continuously from sub-process's input streams
Redirect sub-process's input streams
Close sub-process's input streams
Closing sub-process's input streams
ProcessBuilder processBuilder = new ProcessBuilder(command);
Process process = processBuilder.start();
InputStream inStream = process.getInputStream();
InputStream errStream = process.getErrorStream();
try {
inStream.close();
errStream.close();
} catch (IOException e1) {
}
process.waitFor();
Reading sub-process's input streams
ProcessBuilder processBuilder = new ProcessBuilder(command);
Process process = processBuilder.start();
InputStreamReader tempReader = new InputStreamReader(new BufferedInputStream(p.getInputStream()));
final BufferedReader reader = new BufferedReader(tempReader);
InputStreamReader tempErrReader = new InputStreamReader(new BufferedInputStream(p.getErrorStream()));
final BufferedReader errReader = new BufferedReader(tempErrReader);
try {
while ((line = reader.readLine()) != null) {
}
} catch (IOException e) {
}
try {
while ((line = errReader.readLine()) != null) {
}
} catch (IOException e) {
}
process.waitFor();
Redirecting sub-process's input streams
ProcessBuilder processBuilder = new ProcessBuilder(command);
processBuilder.redirectInput();
processBuilder.redirectError();
Process process = processBuilder.start();
process.waitFor();
(from comments)
Looks like process hang is due to out/error streams becoming full. You need to consume these streams; possibly via a thread.
Java7 provides another way to redirect output.
Related : http://alvinalexander.com/java/java-exec-processbuilder-process-3
Using an self-edited StreamGobbler to run a php script,
I am trying to input commands into the script while it is running...
StreamGobbler.java
private class StreamGobbler extends Thread {
InputStream is;
OutputStream os;
String line;
PMRunnerPro main;
public StreamGobbler(InputStream is, OutputStream os, PMRunnerPro main) {
this.is = is;
this.os = os;
this.main = main;
}
#Override
public void run() {
try {
BufferedReader reader = new BufferedReader (new InputStreamReader(is));
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os));
line = reader.readLine();
while (line != null && ! line.trim().equals("--EOF--")) {
if (main.sSendNeeded) {
System.out.println("Sent");
writer.write(main.sCommand + "\n");
main.sSendNeeded = false;
main.sCommand = "";
}
main.outputBox.setText(main.outputBox.getText() + (line + "\n"));
line = reader.readLine();
}
writer.flush();
} catch(IOException ex) {
main.sRunning = false;
}
System.out.println("Over");
main.sRunning = false;
}
}
The command is sent to the script only when there is an output from the script.
I want the Thread to continuously check if there is any command to send to the script and then do so if there is any.
If I understood your intentions correctly...
Since you using blocking I/O, you need two threads for what you want:
1st thread will read script output, as you do now. Once output available, it will be shown in textarea;
2nd thread will read input from queue and forward it to script.
Here's code draft (notice that you may want to add synchronization between input and output workers, so input worker won't be able to send new command to script until previous command produces output from script, but that's up to you):
class InputWorker implements Runnable {
#Override
public void run() {
try {
BufferedReader reader = new BufferedReader (new InputStreamReader(is));
String line = reader.readLine();
while (line != null && ! line.trim().equals("--EOF--")) {
// show script output
}
} catch(IOException ex) {
//
}
}
}
class OutputWorker implements Runnable {
final BlockingQueue<String> commandQueue = new ArrayBlockingQueue<String>();
public void sendCommand(String command) {
commandQueue.add(command);
}
#Override
public void run() {
try {
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os));
while (true) {
String command = commandQueue.take();
if ("EXIT".equals(command)) { return; }
writer.write(command);
writer.flush();
}
} catch(IOException ex) {
//
} catch (InterruptedException e) {
//
}
}
}