AIR interaction with Java
Hi,
I have a question that is bugging me for a few days. Can an
AIR application communicate with Java classes ( let's say classes
that are using Hibernate).
Thanks in advance,
Theo
you might want to have a look at the merapi project:
http://www.merapiproject.net/
HTH,
-c.
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>
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Hey,
I'm been learning java for a few months now, and know the basics well, I have written a few small programs, including one which transfers songs from iPod to computer.
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Where do I start? :)
My java vocabulary isn't great yet ;)Ryanz wrote:
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[http://www.ibm.com/developerworks/webservices/library/ws-castor/]
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[http://www.ibm.com/developerworks/edu/j-dw-java-jaxrpc2-i.html]
[http://java.sun.com/webservices/docs/2.0/tutorial/doc/]
[http://www.myarch.com/create-jax-ws-service-in-5-minutes]
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I'm trying to do something with Java that I haven't managed to do until now. I'm trying to interact with a perl process giving him input and reading output.
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For instance with the above line you can do the following:
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print "Hello World\n";
Hello World
Here is the code I'm using:
import java.io.BufferedReader;
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private static Runtime runtime;
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As you can see I'm using Runtime class to interact with the process but nothing happens if replace the exec line with:
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I can see in the output the listing of the current directory.
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String[] cmd = new String[]{
"/usr/bin/perl",
"-e",
"while(<>){ eval or die $@; }"
final Process p = Runtime.getRuntime().exec(cmd);
new Thread(){
public void run(){
try{
BufferedReader r = new BufferedReader(new InputStreamReader(p.getInputStream()));
for(String line; (line = r.readLine()) != null; System.out.println("ProcessOUT:: "+line));
catch (Throwable t){
// t.printStackTrace();
}.start();
new Thread(){
public void run(){
try{
BufferedReader r = new BufferedReader(new InputStreamReader(p.getErrorStream()));
for(String line; (line = r.readLine()) != null; System.err.println("ProcessERR:: "+line));
catch (Throwable t){
// t.printStackTrace();
}.start();
new Thread(){
public void run(){
try{
OutputStream out = p.getOutputStream();
for(int ii = 0; ii < commands.length; ii++){
System.err.println("Sending command: "+commands[ii]);
out.write(commands[ii].getBytes());
out.write('\n');
out.flush();
catch (Throwable t){
// t.printStackTrace();
}.start();
int exit = p.waitFor();
System.err.println("Process exited with code: "+exit);
static final String[]
commands = {
"print \"The road goes ever\\n\";",
"print \"ever\\n\";",
"print \"on.\\n\";",
"exit 13;"
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Interacting with Powershell from Java
Hi,
I'm trying to run a Java application which creates a new powershell process on startup and then later on interacts with it multiple times. Calling powershell.exe and have it execute a single command and return the output works fine for me. The problem arises if I don't want the powershell process to immediately finish/exit but to stay open so I can write to its outputStream and receive results back from the inputStream.
String input = "dir";
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This code returns the result of the "dir" command from a powershell - fine. But as you can see, I'm trying to run a second "dir" command using
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This has no effect whatsoever - no second dir output is shown when I run my code. I've also experimented with a powershell.exe option to open the powershell but not close it immediately:
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I've also tried to close the process's outputStream after writing the second "dir" command to it - didn't change anything.
But when I initially call the cmd.exe using the /k (keep open) switch:
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I can then still write to that outputstream and invoke the second "dir" command and get the output of both "dir" commands from the inputstream fo that process.
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Thanks
Kurtuser4491593 wrote:
BUT: my Gobblers only read the output of all my commands Then why don't change your Gobbler code ? ;)
Test this, it's ugly and needs improvemens, but by now works fine on linux and windows:
public class Gobbler implements Runnable {
private PrintStream out;
private String message;
private BufferedReader reader;
public Gobbler(InputStream inputStream, PrintStream out) {
this.reader = new BufferedReader(new InputStreamReader(inputStream));
this.out = out;
this.message = ( null != message ) ? message : "";
public void run() {
String line;
try {
while (null != (line = this.reader.readLine())) {
out.println(message + line);
this.reader.close();
} catch (IOException e) {
System.err.println("ERROR: " + e.getMessage());
public class PowerConsole {
private ProcessBuilder pb;
Process p;
boolean closed = false;
PrintWriter writer;
PowerConsole(String[] commandList) {
pb = new ProcessBuilder(commandList);
try {
p = pb.start();
} catch (IOException ex) {
throw new RuntimeException("Cannot execute PowerShell.exe", ex);
writer = new PrintWriter(new OutputStreamWriter(new BufferedOutputStream(p.getOutputStream())), true);
Gobbler outGobbler = new Gobbler(p.getInputStream(), System.out);
Gobbler errGobbler = new Gobbler(p.getErrorStream(), System.out);
Thread outThread = new Thread(outGobbler);
Thread errThread = new Thread(errGobbler);
outThread.start();
errThread.start();
public void execute(String command) {
if (!closed) {
writer.println(command);
writer.flush();
} else {
throw new IllegalStateException("Power console has ben closed.");
public void close() {
try {
execute("exit");
p.waitFor();
} catch (InterruptedException ex) {
public static void main(String[] args) throws IOException, InterruptedException {
/* PowerConsole pc = new PowerConsole(new String[]{"/bin/bash"});
PowerConsole pc = new PowerConsole(new String[]{"/bin/bash"});
pc.execute("pwd");
pc.execute("ls");
pc.execute("cd /");
pc.execute("ls -l");
pc.execute("cd ~");
pc.execute("find . -name 'test.*' -print");
pc.close();
// PowerConsole pc = new PowerConsole(new String[]{"cmd.exe"});
PowerConsole pc = new PowerConsole(new String[]{"powershell.exe", "-NoExit", "-Command", "-"});
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pc.execute("dir");
System.out.println("========== Executing cd\\");
pc.execute("cd \\"); Thread.sleep(2000);
System.out.println("========== Executing dir");
pc.execute("dir"); Thread.sleep(2000);
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pc.execute("cd \\temp"); Thread.sleep(2000);
System.out.println("========== Executing dir");
pc.execute("dir"); Thread.sleep(2000);
System.out.println("========== Executing cd \\bubba");
pc.execute("cd \\bubba"); Thread.sleep(2000);
System.out.println("========== Exiting .... bye.");
pc.close();
}I tested this and there is still a little problem -look at the test below.
It seems that when thecommand
executed in the powershell prints only a one ot two lines,
powershell doesn't flush the output stream
.... but this rather problem of powershell, not the java code
I have not a clue how to force powershell to flush
it's output stream after each command.
C:\temp>java -jar PowerShell.jar
========== Executing dir
Directory: Microsoft.PowerShell.Core\FileSystem::C:\temp
Mode LastWriteTime Length Name
-a--- 2012-01-09 01:16 5290 PowerShell.jar
========== Executing cd\
========== Executing dir
Directory: Microsoft.PowerShell.Core\FileSystem::C:\
Mode LastWriteTime Length Name
d---- 2012-01-08 02:56 61587b977687a6e22fbe
d---- 2011-12-14 03:19 Documents and Settings
d---- 2011-12-15 00:05 oraclexe
d-r-- 2012-01-08 03:44 Program Files
d---- 2012-01-05 19:59 sqldeveloper
d---- 2012-01-09 01:15 temp
d---- 2012-01-09 01:13 WINDOWS
-a--- 2011-12-14 03:12 0 AUTOEXEC.BAT
-a--- 2011-12-14 03:12 0 CONFIG.SYS
========== Executing cd \temp
========== Executing dir
Directory: Microsoft.PowerShell.Core\FileSystem::C:\temp
Mode LastWriteTime Length Name
-a--- 2012-01-09 01:16 5290 PowerShell.jar
========== Executing cd \bubba
Set-Location : Cannot find path 'C:\bubba' because it does not exist.
At line:1 char:3
+ cd <<<< \bubba
========== Exiting .... bye.
C:\temp> -
Hi!
I got a old exe file, that no more maintain by any team.
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