Process)
*
* This class is currently used by ProcesHandler
* internally only.
*/
class Pump extends Thread
{
private LineNumberReader reader;
private String pref;
private StringBuffer buf = new StringBuffer(256);
private PrintWriter log;
private boolean bOutput;
/**
* Creates Pump for specified InputStream.
* This Pump also synchronously output text read to
* log by prefixed lines. Constructor immediately
* starts reading in a separate thread.
*
* @param is Stream which requires permanent reading.
* @param log Writer where prefixed text lines to be output
* @param outPrefix A prefix which is printed at the
* beginning of each output line.
*/
public Pump(InputStream is, PrintWriter log, String outPrefix, boolean _bOutput)
{
this.pref = (outPrefix == null) ? "" : outPrefix;
reader = new LineNumberReader(new InputStreamReader(is));
this.log = log;
this.bOutput = _bOutput;
start();
}
public void run()
{
try
{
String line = reader.readLine();
while (line != null)
{
if (bOutput)
{
log.println(pref + line);
log.flush();
}
buf.append(line).append('\n');
line = reader.readLine();
}
}
catch (java.io.IOException e)
{
log.println(pref + "Exception occured: " + e);
}
}
/**
* Returns the text collected from input stream.
*/
public String getStringBuffer()
{
return buf.toString();
}
}
/**
* Class provides convenient way for running external program
* handle its standard streams, control execution and check results.
* Instance of this class must be created only for a single
* execution. If you need to execute the same command again you
* should create a new instance for this.
*/
public class ProcessHandler
{
private String cmdLine;
private String[] cmdLineArray;
private String[] envVars = null;
private File workDir = null;
private PrintWriter log;
private int exitValue = -1;
private boolean isFinished = false;
private boolean isStarted = false;
private boolean mbTimedOut = false;
private long mTimeOut = 0;
private String stdInBuff = "";
private Pump stdout = null;
private Pump stderr = null;
private PrintStream stdIn = null;
private Process m_aProcess = null;
private TestParameters param = null;
private boolean debug = false;
private boolean bUseOutput = true;
private int m_nProcessTimeout = 0;
private String m_sProcessKiller;
private ProcessWatcher m_aWatcher;
/**
* Creates instance with specified external command.
* Debug info and output
* of external command is printed to stdout.
* @param cmdLine
*/
public ProcessHandler(String cmdLine)
{
this(cmdLine, null, null, null, 0);
}
/**
* Creates instance with specified external command
* including parameters as an array.
* Debug info and output
* of external command is printed to stdout.
* @param cmdLines
*/
public ProcessHandler(String[] cmdLines)
{
this(null, null, null, null, 0);
cmdLineArray = cmdLines;
}
/**
* Creates instance with specified external command
* including parameters as an array, with environment
* variables.
* Debug info and output
* of external command is printed to stdout.
* @param cmdLines
* @param envVars
* @see java.lang.Runtime exec(String[], String[])
*/
public ProcessHandler(String[] cmdLines, String[] envVars)
{
this(null, null, null, envVars, 0);
cmdLineArray = cmdLines;
}
/**
* Creates instance with specified external command
* including parameters as an array, with environment
* variables. The command will be started in workDir.
* Debug info and output
* of external command is printed to stdout.
* @param cmdLines
* @param workDir
*/
public ProcessHandler(String[] cmdLines, File workDir)
{
this(null, null, workDir, null, 0);
cmdLineArray = cmdLines;
}
/**
* Creates instance with specified external command and
* log stream where debug info and output
* of external command is printed out. The command will be started in workDir.
* @param cmdLines
* @param log
* @param workDir
*/
public ProcessHandler(String[] cmdLines, PrintWriter log, File workDir)
{
this(null, log, workDir, null, 0);
cmdLineArray = cmdLines;
}
/**
* Creates instance with specified external command and
* log stream where debug info and output
* of external command is printed out.
* @param cmdLine
* @param log
*/
public ProcessHandler(String cmdLine, PrintWriter log)
{
this(cmdLine, log, null, null, 0);
}
/**
* Creates instance with specified external command and set the time out for the command.
* @param cmdLine
* @param timeOut
*/
public ProcessHandler(String cmdLine, int timeOut)
{
this(cmdLine, null, null, null, timeOut);
}
/**
* Creates instance with specified external command which
* will be executed in the some work directory.
* Debug info and output
* of external commandis printed to stdout.
* @param cmdLine
* @param workDir
*/
public ProcessHandler(String cmdLine, File workDir)
{
this(cmdLine, null, workDir, null, 0);
}
/**
* Creates instance with specified external command which
* will be executed in the some work directory.
* Debug info and output printed in log stream.
* @param cmdLine
* @param log
* @param workDir
*/
public ProcessHandler(String cmdLine, PrintWriter log, File workDir)
{
this(cmdLine, log, workDir, null, 0);
}
/**
* Creates instance with specified external command which
* will be executed in the some work directory and
* log stream where debug info and output
* of external command is printed .
* The specified environment variables are set for the new process.
* If log stream is null, logging is printed to stdout.
* @param cmdLine
* @param log
* @param workDir
* @param envVars
*/
public ProcessHandler(String cmdLine, PrintWriter log, File workDir, String[] envVars)
{
this(cmdLine, log, workDir, envVars, 0);
}
/**
* Creates instance with specified external command which
* will be executed in the some work directory and
*
* @param cmdLine the command to be executed
* @param log log stream where debug info and output
* of external command is printed .
* @param workDir The working directory of the new process
* @param envVars The specified environment variables are
* set for the new process.
* If log stream is null, logging is printed to stdout.
* @param timeOut When started sychronisly, the maximum time the
* process will live. When the process being destroyed
* a log will be written out. It can be asked on
* isTimedOut() if it has been terminated.
*
* timeOut > 0
* Waits specified time in miliSeconds for
* process to exit and return its status.
*
* timeOut = 0
* Waits for the process to end regulary
*
* timeOut < 0
* Kills the process immediately
*
*
*/
public ProcessHandler(String cmdLine, PrintWriter log, File workDir, String[] envVars, long timeOut)
{
this.cmdLine = cmdLine;
this.workDir = workDir;
this.log = log;
this.cmdLine = cmdLine;
this.envVars = envVars;
if (log == null)
{
this.log = new PrintWriter(new OutputStreamWriter(System.out));
}
else
{
this.log = log;
}
this.mTimeOut = timeOut;
}
/**
* Creates instance with specified external command which
* will be executed in the some work directory and
* log stream where debug info and output of external command is printed.
* If log stream is null, logging is printed to stdout.
* From the TestParameters the OfficeWachter get a ping.
* @param commands
* @param log
* @param workDir
* @param shortWait If this parameter is ture the mTimeOut is set to 5000 ms, else it is set to
* half of time out from parameter timeout.
* @param param the TestParameters
* @see lib.TestParameters
* @see helper.OfficeWatcher
*/
public ProcessHandler(String[] commands, PrintWriter log, File workDir, int shortWait, TestParameters param)
{
this(null, log, workDir, null, 0);
this.cmdLineArray = commands;
this.param = param;
if (shortWait != 0)
{
this.mTimeOut = shortWait;
}
else
{
this.mTimeOut = (long) (param.getInt(PropertyName.TIME_OUT) / 1.3);
}
debug = param.getBool(PropertyName.DEBUG_IS_ACTIVE);
}
/**
* If not equal 0, the time to maximal wait.
* @param _n
*/
public void setProcessTimeout(int _n)
{
m_nProcessTimeout = _n;
}
/**
* This command will call after ProcessTimeout is arrived.
* @param _s
*/
public void setProcessKiller(String _s)
{
m_sProcessKiller = _s;
}
/**
* This method do an asynchronous execution of the commands. To avoid a interruption on long running processes
* caused by OfficeWatcher, the OfficeWatcher get frequently a ping.
* @see helper.OfficeWatcher
*/
public void runCommand()
{
boolean changedText = true;
int count = 0;
String memText = "";
this.executeAsynchronously();
OfficeWatcher ow = null;
if (param != null)
{
ow = (OfficeWatcher) param.get(PropertyName.OFFICE_WATCHER);
}
if (ow != null)
{
ow.ping();
}
int hangcheck = 10;
while (!this.isFinished() && changedText)
{
count++;
// dbg("runCommand: waiting " + mTimeOut / 1000 + " seconds while command execution is ongoing... " + count);
// shortWait(mTimeOut);
// shortWait(2000); // wait 2 seconds.
//waitFor(mTimeOut);
waitFor(2000, false); // wait but don't kill
if (ow != null)
{
ow.ping();
}
// check for changes in the output stream. If there are no changes, the process maybe hangs
if (!this.isFinished())
{
hangcheck--;
if (hangcheck < 0)
{
String sOutputText = getOutputText();
if (sOutputText.length() == memText.length())
{
changedText = false;
// dbg("runCommand Could not detect changes in output stream!!!");
}
hangcheck = 10;
memText = this.getOutputText();
}
}
}
if (!this.isFinished())
{
dbg("runCommand Process ist not finished but there are no changes in output stream.");
this.kill();
}
}
public boolean isTimedOut()
{
return mbTimedOut;
}
private void setTimedOut(boolean bTimedOut)
{
mbTimedOut = bTimedOut;
}
/**
* Executes the command and returns only when the process
* exits.
*
* @return true if process was successfully
* started and correcly exits (exit code doesn't affect
* to this result).
*/
public boolean executeSynchronously()
{
execute();
return waitFor(mTimeOut);
}
/**
* Executes the command immediately returns. The process
* remains in running state. Control of its state should
* be made by waitFor methods.
*
* @return true if process was successfully
* started.
*/
public boolean executeAsynchronously()
{
execute();
return isStarted();
}
public synchronized void kill()
{
if (!isStarted())
{
return;
}
boolean exit = false;
int counter = 1;
while (counter < 3 && !exit)
{
m_aProcess.destroy();
try
{
Thread.sleep(1000 * counter); // 5000
}
catch (java.lang.InterruptedException e)
{
}
try
{
final int exit_Value = m_aProcess.exitValue();
if (exit_Value < 1)
{
exit = true;
}
else
{
counter++;
}
dbg("kill: process closed with exit code " + exit_Value);
}
catch (java.lang.IllegalThreadStateException e)
{
if (counter < 3)
{
dbg("kill: Couldn't close process after " + counter + " attempts, trying again");
}
counter++;
}
}
isStarted = false;
}
/**
* Returns the time in seconds since 1st January 1970
* @return
*/
public static long getSystemTime()
{
// Calendar cal = new GregorianCalendar();
// final long nTime = cal.getTimeInMillis();
final long nTime = System.currentTimeMillis();
return nTime;
}
private long m_nExactStartTimeInMillisec;
private void initialExactStartTime()
{
m_nExactStartTimeInMillisec = getSystemTime();
}
public long getProcessStartTime()
{
return m_nExactStartTimeInMillisec;
}
private void showEnvVars()
{
if (envVars != null)
{
for (int i = 0; i < envVars.length; i++)
{
log.println("env: " + envVars[i]);
}
}
else
{
log.println("env: null");
}
}
protected void execute()
{
if (isStarted())
{
throw new RuntimeException(
"The process handler has already been executed.");
}
final Runtime runtime = Runtime.getRuntime();
try
{
if (cmdLine == null)
{
log.println(utils.getDateTime() + "execute: Starting command from array: ");
for (int i = 0; i < cmdLineArray.length; i++)
{
log.println(cmdLineArray[i]);
// log.print(" ");
}
showEnvVars();
log.println("");
initialExactStartTime();
initializeProcessKiller();
m_aProcess = runtime.exec(cmdLineArray, envVars);
}
else
{
if (workDir != null)
{
log.println(utils.getDateTime() + "execute: Starting command: ");
log.println(cmdLine + " path=" + workDir.getAbsolutePath());
showEnvVars();
m_aProcess = runtime.exec(cmdLine, envVars, workDir);
}
else
{
log.println(utils.getDateTime() + "execute: Starting command: ");
log.println(cmdLine);
showEnvVars();
m_aProcess = runtime.exec(cmdLine, envVars);
}
}
isStarted = true;
}
catch (java.io.IOException e)
{
if (cmdLine == null)
{
log.println(utils.getDateTime() + "execute: The command array can't be started: " + e);
}
else
{
log.println(utils.getDateTime() + "execute: The command " + cmdLine + " can't be started: " + e);
}
return;
}
dbg("execute: pump io-streams");
stdout = new Pump(m_aProcess.getInputStream(), log, "out > ", bUseOutput);
stderr = new Pump(m_aProcess.getErrorStream(), log, "err > ", bUseOutput);
stdIn = new PrintStream(m_aProcess.getOutputStream());
// int nExitValue = m_aProcess.exitValue();
// int dummy = 0;
dbg("execute: flush io-streams");
flushInput();
}
/**
* This method is useful when the process was executed
* asynchronously. Waits for process to exit and return
* its result.
*
* @return true if process correctly exited
* (exit code doesn't affect to this result).
*/
public boolean waitFor()
{
return waitFor(0);
}
/**
* This method is useful when the process was executed
* asynchronously. Waits during specified time for process
* to exit and return its status.
*
* @param timeout > 0
* Waits specified time in miliSeconds for
* process to exit and return its status.
*
* = 0
* Waits for the process to end regulary
*
* < 0
* Kills the process immediately
*
* @return true if process correctly exited
* (exit code doesn't affect to this result).
*/
public boolean waitFor(long timeout)
{
return waitFor(timeout, true);
}
private boolean waitFor(long timeout, boolean bKillProcessAfterTimeout)
{
if (isFinished())
{
return true;
}
if (!isStarted())
{
return false;
}
if (timeout == 0)
{
try
{
m_aProcess.waitFor();
}
catch (InterruptedException e)
{
log.println("The process was interrupted: " + e);
}
isFinished = true;
try
{
exitValue = m_aProcess.exitValue();
}
catch (IllegalThreadStateException e)
{
}
}
else
{
try
{
while (!isFinished && timeout > 0)
{
isFinished = true;
Thread.sleep(1000);
timeout -= 1000;
try
{
exitValue = m_aProcess.exitValue(); // throws exception if not finished
}
catch (IllegalThreadStateException e)
{
isFinished = false;
}
}
if (timeout < 0)
{
setTimedOut(true);
log.println("The process has timed out!");
}
}
catch (InterruptedException ex)
{
log.println("The process was interrupted: " + ex);
}
}
if (bKillProcessAfterTimeout == true)
{
if (!isFinished)
{
log.println("Going to destroy the process!!");
m_aProcess.destroy();
log.println("Process has been destroyed!");
}
}
// Removed as hung up in SDK test 'PathSettings'
// try {
// stdout.join();
// stderr.join();
// } catch (InterruptedException e) {}
return isFinished();
}
protected void flushInput()
{
if (stdIn == null)
{
return;
}
synchronized(stdInBuff)
{
stdIn.print(stdInBuff);
stdIn.flush();
stdInBuff = "";
}
}
/**
* Returns the text output by external command to stdout.
* @return the text output by external command to stdout
*/
public String getOutputText()
{
if (stdout == null)
{
return "";
}
else
{
return stdout.getStringBuffer();
}
}
/**
* Returns the text output by external command to stderr.
* @return the text output by external command to stderr
*/
public String getErrorText()
{
if (stderr == null)
{
return "";
}
else
{
return stderr.getStringBuffer();
}
}
/**
* Prints the string specified to sdtin of external
* command. '\n' is not added so if you need you
* should terminate the string with '\n'.
*
* The method can also be called before the command
* starts its execution. Then the text is buffered
* and transfered to command when it will be started.
* @param str
*/
public void printInputText(String str)
{
stdInBuff += str;
flushInput();
}
/**
* Returns information about was the command started or
* not.
*
* @return true if the external command was
* found and successfully started.
*/
public boolean isStarted()
{
return isStarted;
}
/**
* Returns the information about the final state of command
* execution.
*
* @return true if the command correctly starts,
* exits and was not interrupted due to timeout.
*/
public boolean isFinished()
{
return isFinished;
}
/**
* Returns exit code of the external command.
*
* @return exit code of command if it was finished,
* -1 if not.
*/
public int getExitCode()
{
try
{
exitValue = m_aProcess.exitValue();
}
catch (Exception e)
{
//System.out.println("No ExitValue available");
}
return exitValue;
}
/** Causes the thread to sleep some time.
* @param milliseconds
*/
public static void shortWait(long milliseconds)
{
try
{
Thread.sleep(milliseconds);
}
catch (InterruptedException e)
{
System.out.println("While waiting :" + e);
}
}
private void dbg(String message)
{
if (debug)
{
log.println(utils.getDateTime() + "PH." + message);
}
}
public void noOutput()
{
bUseOutput = false;
}
// -------------------------------------------------------------------------
class ProcessWatcher extends Thread
{
private int m_nTimeoutInSec;
private String m_sProcessToStart;
private boolean m_bInterrupt;
public ProcessWatcher(int _nTimeOut, String _sProcess)
{
m_nTimeoutInSec = _nTimeOut;
m_sProcessToStart = _sProcess;
m_bInterrupt = false;
}
/**
* returns true, if the thread should hold on
* @return
*/
public synchronized boolean isInHoldOn()
{
return m_bInterrupt;
}
/**
* Marks the thread to hold on, next time
* STUPID: The thread must poll this flag itself.
*
* Reason: interrupt() seems not to work as expected.
*/
public synchronized void holdOn()
{
m_bInterrupt = true;
interrupt();
}
public void run()
{
while (m_nTimeoutInSec > 0)
{
m_nTimeoutInSec--;
try
{
sleep(1000);
}
catch(java.lang.InterruptedException e)
{
// interrupt flag is set back to 'not interrupted' :-(
}
if (isInHoldOn())
{
break;
}
}
if (m_nTimeoutInSec <= 0 && !isInHoldOn()) // not zero, so we are interrupted.
{
system(m_sProcessToStart);
}
}
/**
* Start an external Process
* @param _sProcess
*/
private void system(String _sProcess)
{
if (_sProcess == null)
{
return;
}
try
{
// run a _sProcess command
// using the Runtime exec method:
Process p = Runtime.getRuntime().exec(_sProcess);
BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
BufferedReader stdError = new BufferedReader(new InputStreamReader(p.getErrorStream()));
// read the output from the command
String s;
while ((s = stdInput.readLine()) != null)
{
System.out.println("out:" + s);
}
// read any errors from the attempted command
while ((s = stdError.readLine()) != null)
{
System.out.println("err:" + s);
}
}
catch (java.io.IOException e)
{
System.out.println("exception caught: ");
e.printStackTrace();
}
}
}
/**
* If the timeout only given by setProcessTimeout(int seconds) function is != 0,
* a extra thread is created and after time has run out, the ProcessKiller string
* given by function setProcessKiller(string) will execute.
* So it is possible to kill a running office after a given time of seconds.
*/
private void initializeProcessKiller()
{
if (m_nProcessTimeout != 0)
{
m_aWatcher = new ProcessWatcher(m_nProcessTimeout, m_sProcessKiller);
m_aWatcher.start();
}
}
/**
* to stop the extra thread, before he will kill a running office. This will stop the thread.
*/
public void stopWatcher()
{
if (m_aWatcher != null)
{
m_aWatcher.holdOn();
shortWait(5000);
}
}
}