Class CommandLauncherImpl

java.lang.Object
org.apache.commons.exec.launcher.CommandLauncherImpl
All Implemented Interfaces:
CommandLauncher
Direct Known Subclasses:
CommandLauncherProxy, Java13CommandLauncher

public abstract class CommandLauncherImpl extends Object implements CommandLauncher
A command launcher for a particular JVM/OS platform. This class is a general purpose command launcher which can only launch commands in the current working directory.
  • Constructor Details

  • Method Details

    • exec

      public Process exec(CommandLine cmd, Map<String,String> env) throws IOException
      Description copied from interface: CommandLauncher
      Executes the given command in a new process.
      Specified by:
      exec in interface CommandLauncher
      Parameters:
      cmd - The command to execute.
      env - The environment for the new process. If null, the environment of the current process is used.
      Returns:
      the newly created process.
      Throws:
      IOException - if attempting to run a command in a specific directory.
    • exec

      public abstract Process exec(CommandLine cmd, Map<String,String> env, File workingDir) throws IOException
      Description copied from interface: CommandLauncher
      Executes the given command in a new process, in the given working directory.
      Specified by:
      exec in interface CommandLauncher
      Parameters:
      cmd - The command to execute.
      env - The environment for the new process. If null, the environment of the current process is used.
      workingDir - The directory to start the command in. If null, the current directory is used.
      Returns:
      the newly created process.
      Throws:
      IOException - if trying to change directory.
    • isFailure

      public boolean isFailure(int exitValue)
      Description copied from interface: CommandLauncher
      Tests whether exitValue signals 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.

      Specified by:
      isFailure in interface CommandLauncher
      Parameters:
      exitValue - the exit value (return code) to be checked.
      Returns:
      true if exitValue signals a failure.
      See Also: