org.apache.storm.utils

## Interface ShellCommandRunner

- All Known Implementing Classes:
    ShellCommandRunnerImpl

      public interface ShellCommandRunner

  Contains convenience functions for running shell commands for cases that are too simple to need a full `ShellUtils` implementation.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `String` | `execCommand(Map<String,String> env, String... cmd)` Method to execute a shell command.
    `String` | `execCommand(Map<String,String> env, String[] cmd, long timeout)` Method to execute a shell command.
    `String` | `execCommand(String... cmd)` Method to execute a shell command.
    `String` | `getTokenSeparatorRegex()` Token separator regex used to parse Shell tool outputs.

- - ### Method Detail

    - #### execCommand

          String execCommand(String... cmd)
                      throws IOException

      Method to execute a shell command. Covers most of the simple cases without requiring the user to implement the `ShellUtils` interface.

      Parameters:
        `cmd` - shell command to execute.
      Returns:
        the output of the executed command.
      Throws:
        `IOException`

    - #### execCommand

          String execCommand(Map<String,String> env,
                             String[] cmd,
                             long timeout)
                      throws IOException

      Method to execute a shell command. Covers most of the simple cases without requiring the user to implement the `ShellUtils` interface.

      Parameters:
        `env` - the map of environment key=value
        `cmd` - shell command to execute.
        `timeout` - time in milliseconds after which script should be marked timeout
      Returns:
        the output of the executed command.
      Throws:
        `IOException`

    - #### execCommand

          String execCommand(Map<String,String> env,
                             String... cmd)
                      throws IOException

      Method to execute a shell command. Covers most of the simple cases without requiring the user to implement the `ShellUtils` interface.

      Parameters:
        `env` - the map of environment key=value
        `cmd` - shell command to execute.
      Returns:
        the output of the executed command.
      Throws:
        `IOException`

    - #### getTokenSeparatorRegex

          String getTokenSeparatorRegex()

      Token separator regex used to parse Shell tool outputs.

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