Package org.apache.tools.ant.taskdefs
Class Execute
- java.lang.Object
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- org.apache.tools.ant.taskdefs.Execute
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public class Execute extends java.lang.ObjectRuns an external program.- Since:
- Ant 1.2
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Field Summary
Fields Modifier and Type Field Description static intINVALIDInvalid exit code.
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Constructor Summary
Constructors Constructor Description Execute()Creates a new execute object usingPumpStreamHandlerfor stream handling.Execute(ExecuteStreamHandler streamHandler)Creates a new execute object.Execute(ExecuteStreamHandler streamHandler, ExecuteWatchdog watchdog)Creates a new execute object.
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Method Summary
Modifier and Type Method Description static voidcloseStreams(java.lang.Process process)Close the streams belonging to the given Process.intexecute()Runs a process defined by the command line and returns its exit status.java.lang.String[]getCommandline()Returns the commandline used to create a subprocess.java.lang.String[]getEnvironment()Returns the environment used to create a subprocess.static java.util.Map<java.lang.String,java.lang.String>getEnvironmentVariables()Find the list of environment variables for this process.intgetExitValue()Query the exit value of the process.static java.util.Vector<java.lang.String>getProcEnvironment()Deprecated.use #getEnvironmentVariables insteadjava.io.FilegetWorkingDirectory()Return the working directory.booleanisFailure()Did this execute return in a failure.static booleanisFailure(int exitValue)Checks whetherexitValuesignals a failure on the current system (OS specific).booleankilledProcess()Test for an untimely death of the process.static java.lang.Processlaunch(Project project, java.lang.String[] command, java.lang.String[] env, java.io.File dir, boolean useVM)Creates a process that runs a command.static voidrunCommand(Task task, java.lang.String... cmdline)A utility method that runs an external command.voidsetAntRun(Project project)Set the name of the antRun script using the project's value.voidsetCommandline(java.lang.String[] commandline)Sets the commandline of the subprocess to launch.voidsetEnvironment(java.lang.String[] env)Sets the environment variables for the subprocess to launch.protected voidsetExitValue(int value)Set the exit value.voidsetNewenvironment(boolean newenv)Set whether to propagate the default environment or not.voidsetSpawn(boolean spawn)Deprecated.voidsetStreamHandler(ExecuteStreamHandler streamHandler)Set the stream handler to use.voidsetVMLauncher(boolean useVMLauncher)Launch this execution through the VM, where possible, rather than through the OS's shell.voidsetWorkingDirectory(java.io.File wd)Sets the working directory of the process to execute.voidspawn()Starts a process defined by the command line.static java.lang.StringtoString(java.io.ByteArrayOutputStream bos)ByteArrayOutputStream#toString doesn't seem to work reliably on OS/390, at least not the way we use it in the execution context.protected voidwaitFor(java.lang.Process process)Wait for a given process.
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Field Detail
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INVALID
public static final int INVALID
Invalid exit code. set toInteger.MAX_VALUE- See Also:
- Constant Field Values
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Constructor Detail
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Execute
public Execute()
Creates a new execute object usingPumpStreamHandlerfor stream handling.
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Execute
public Execute(ExecuteStreamHandler streamHandler)
Creates a new execute object.- Parameters:
streamHandler- the stream handler used to handle the input and output streams of the subprocess.
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Execute
public Execute(ExecuteStreamHandler streamHandler, ExecuteWatchdog watchdog)
Creates a new execute object.- Parameters:
streamHandler- the stream handler used to handle the input and output streams of the subprocess.watchdog- a watchdog for the subprocess ornullto disable a timeout for the subprocess.
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Method Detail
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setSpawn
@Deprecated public void setSpawn(boolean spawn)
Deprecated.Set whether or not you want the process to be spawned. Default is not spawned.- Parameters:
spawn- if true you do not want Ant to wait for the end of the process. Has no influence in here, the calling task contains and acts accordingly- Since:
- Ant 1.6
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getEnvironmentVariables
public static java.util.Map<java.lang.String,java.lang.String> getEnvironmentVariables()
Find the list of environment variables for this process.- Returns:
- a map containing the environment variables.
- Since:
- Ant 1.8.2
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getProcEnvironment
@Deprecated public static java.util.Vector<java.lang.String> getProcEnvironment()
Deprecated.use #getEnvironmentVariables insteadFind the list of environment variables for this process.- Returns:
- a vector containing the environment variables. The vector elements are strings formatted like variable = value.
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toString
public static java.lang.String toString(java.io.ByteArrayOutputStream bos)
ByteArrayOutputStream#toString doesn't seem to work reliably on OS/390, at least not the way we use it in the execution context.- Parameters:
bos- the output stream that one wants to read.- Returns:
- the output stream as a string, read with special encodings in the case of z/os and os/400.
- Since:
- Ant 1.5
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setStreamHandler
public void setStreamHandler(ExecuteStreamHandler streamHandler)
Set the stream handler to use.- Parameters:
streamHandler- ExecuteStreamHandler.- Since:
- Ant 1.6
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getCommandline
public java.lang.String[] getCommandline()
Returns the commandline used to create a subprocess.- Returns:
- the commandline used to create a subprocess.
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setCommandline
public void setCommandline(java.lang.String[] commandline)
Sets the commandline of the subprocess to launch.- Parameters:
commandline- the commandline of the subprocess to launch.
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setNewenvironment
public void setNewenvironment(boolean newenv)
Set whether to propagate the default environment or not.- Parameters:
newenv- whether to propagate the process environment.
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getEnvironment
public java.lang.String[] getEnvironment()
Returns the environment used to create a subprocess.- Returns:
- the environment used to create a subprocess.
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setEnvironment
public void setEnvironment(java.lang.String[] env)
Sets the environment variables for the subprocess to launch.- Parameters:
env- array of Strings, each element of which has an environment variable settings in format key=value.
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setWorkingDirectory
public void setWorkingDirectory(java.io.File wd)
Sets the working directory of the process to execute.This is emulated using the antRun scripts unless the OS is Windows NT in which case a cmd.exe is spawned, or MRJ and setting user.dir works, or JDK 1.3 and there is official support in java.lang.Runtime.
- Parameters:
wd- the working directory of the process.
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getWorkingDirectory
public java.io.File getWorkingDirectory()
Return the working directory.- Returns:
- the directory as a File.
- Since:
- Ant 1.7
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setAntRun
public void setAntRun(Project project) throws BuildException
Set the name of the antRun script using the project's value.- Parameters:
project- the current project.- Throws:
BuildException- not clear when it is going to throw an exception, but it is the method's signature.
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setVMLauncher
public void setVMLauncher(boolean useVMLauncher)
Launch this execution through the VM, where possible, rather than through the OS's shell. In some cases and operating systems using the shell will allow the shell to perform additional processing such as associating an executable with a script, etc.- Parameters:
useVMLauncher- true if exec should launch through the VM, false if the shell should be used to launch the command.
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launch
public static java.lang.Process launch(Project project, java.lang.String[] command, java.lang.String[] env, java.io.File dir, boolean useVM) throws java.io.IOException
Creates a process that runs a command.- Parameters:
project- the Project, only used for logging purposes, may be null.command- the command to run.env- the environment for the command.dir- the working directory for the command.useVM- use the built-in exec command for JDK 1.3 if available.- Returns:
- the process started.
- Throws:
java.io.IOException- forwarded from the particular launcher used.- Since:
- Ant 1.5
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execute
public int execute() throws java.io.IOExceptionRuns a process defined by the command line and returns its exit status.- Returns:
- the exit status of the subprocess or
INVALID. - Throws:
java.io.IOException- The exception is thrown, if launching of the subprocess failed.
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spawn
public void spawn() throws java.io.IOExceptionStarts a process defined by the command line. Ant will not wait for this process, nor log its output.- Throws:
java.io.IOException- The exception is thrown, if launching of the subprocess failed.- Since:
- Ant 1.6
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waitFor
protected void waitFor(java.lang.Process process)
Wait for a given process.- Parameters:
process- the process one wants to wait for.
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setExitValue
protected void setExitValue(int value)
Set the exit value.- Parameters:
value- exit value of the process.
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getExitValue
public int getExitValue()
Query the exit value of the process.- Returns:
- the exit value or Execute.INVALID if no exit value has been received.
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isFailure
public static boolean isFailure(int exitValue)
Checks whetherexitValuesignals a failure on the current system (OS specific).Note that this method relies on the conventions of the OS, it will return false results if the application you are running doesn't follow these conventions. One notable exception is the Java VM provided by HP for OpenVMS - it will return 0 if successful (like on any other platform), but this signals a failure on OpenVMS. So if you execute a new Java VM on OpenVMS, you cannot trust this method.
- Parameters:
exitValue- the exit value (return code) to be checked.- Returns:
trueifexitValuesignals a failure.
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isFailure
public boolean isFailure()
Did this execute return in a failure.- Returns:
- true if and only if the exit code is interpreted as a failure
- Since:
- Ant1.7
- See Also:
isFailure(int)
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killedProcess
public boolean killedProcess()
Test for an untimely death of the process.- Returns:
- true if a watchdog had to kill the process.
- Since:
- Ant 1.5
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runCommand
public static void runCommand(Task task, java.lang.String... cmdline) throws BuildException
A utility method that runs an external command. Writes the output and error streams of the command to the project log.- Parameters:
task- The task that the command is part of. Used for loggingcmdline- The command to execute.- Throws:
BuildException- if the command does not exit successfully.
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closeStreams
public static void closeStreams(java.lang.Process process)
Close the streams belonging to the given Process.- Parameters:
process- theProcess.
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