Package 

Class HelpersKt

  • All Implemented Interfaces:
    
public final class HelpersKt

    • Constructor Detail

    • Method Detail

      • getDisableChecks

         Boolean getDisableChecks()

        Disable heavy and optional checks in runtime. This flag can be enabled to get a small performance boost. Do NOT do this on development (it could mask problems) and enable it on production only if you have tested your application extensively.

        It's initial value is taken from the DISABLE_CHECKS flag. See Jvm.systemFlag for details on how flags are checked on a JVM.

        This variable can be changed on code to affect only certain parts of the code, however this is not advised and should be done carefully.

      • setDisableChecks

         void setDisableChecks(Boolean disableChecks)

        Disable heavy and optional checks in runtime. This flag can be enabled to get a small performance boost. Do NOT do this on development (it could mask problems) and enable it on production only if you have tested your application extensively.

        It's initial value is taken from the DISABLE_CHECKS flag. See Jvm.systemFlag for details on how flags are checked on a JVM.

        This variable can be changed on code to affect only certain parts of the code, however this is not advised and should be done carefully.

      • println

         final static <T extends Any> T println(T $self, String prefix)

        Print receiver to stdout. Convenient utility to debug variables quickly.

        Parameters:
        prefix - String to print before the actual object information.

      • freePort

         final static Integer freePort()

        Return a random free port (not used by any other local process).

      • isPortOpened

         final static Boolean isPortOpened(Integer port)

        Check if a port is already opened.

        Parameters:
        port - Port number to check.

      • retry

         final static <T extends Any> T retry(Integer times, Long delay, Function0<T> block)

        Execute a lambda until no exception is thrown or a number of times is reached.

        Parameters:
        times - Number of times to try to execute the callback.
        delay - Milliseconds to wait to next execution if there was an error.
        block - Code to be executed.

      • exec

         final static String exec(List<String> $self, File workingDirectory, Long timeout, Boolean fail)

        TODO.

        TODO Assure JVM closes properly after process execution (dispose process resources, etc.)

      • exec

         final static String exec(String $self, File workingDirectory, Long timeout, Boolean fail)

        TODO Add use case and example in documentation. TODO Support multiple words parameters by processing " and '

        Run the receiver's text as a process in the host operating system. The command can have multiple lines and may or may not contain the shell continuation string (\\n).

        Parameters:
        workingDirectory - Directory on which the process will be executed.
        timeout - Maximum number of seconds allowed for process execution.
        fail - If true Raise an exception if the result code is different than zero.

      • filterStackTrace

         final static Array<out StackTraceElement> filterStackTrace(Throwable $self, String prefix)

        Return the stack trace array of the frames that starts with the given prefix.

        Parameters:
        prefix - Prefix used to filter stack trace elements (applied to class names).

      • toText

         final static String toText(Throwable $self, String prefix)

        Return this throwable as a text.

        Parameters:
        prefix - Optional prefix to filter stack trace elements.

      • keys

         final static <T extends Any> T keys(Map<?, ?> $self, Object keys)

        TODO.

        Parameters:
        keys - .

      • require

         final static <K extends Any, V extends Any> V require(Map<K, V> $self, K name)

        TODO.

        Parameters:
        name - .