Class CommandParser

java.lang.Object

java.lang.Thread

edu.uky.cs.nil.tt.CommandParser

All Implemented Interfaces:

Runnable

public class CommandParser
extends Thread

A command parser listens (on standard input) for and executes simple text commands, like modifying the server's database and shutting the server down.

Author:

Stephen G. Ware

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	CommandParser.Command	A command is a type of operation that can be parsed by a command parser and executed on a server.
static interface	CommandParser.Operation	An operation represents a single command that can be executed on a server based on a series of arguments that define how it behaves.

Nested classes/interfaces inherited from class Thread

Thread.Builder, Thread.State, Thread.UncaughtExceptionHandler

Field Summary

Fields inherited from class Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Constructor	Description
CommandParser(Server server)	Constructs a new command parser for a server.

Method Summary

Modifier and Type	Method	Description
void	add(CommandParser.Command command)	Adds a new command to the list of command this parser can recognize.
List<CommandParser.Command>	getCommands()	Returns a list of all of the command this parser can recognize.
String	getUsage()	Returns a documentation string showing how to use the commands this parser can recognize.
void	parse(String command)	Attempts to parse and execute a command from a string, typically one typed into standard input.
void	run()

Methods inherited from class Thread

activeCount, checkAccess, clone, countStackFrames, currentThread, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, isVirtual, join, join, join, join, ofPlatform, ofVirtual, onSpinWait, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, sleep, start, startVirtualThread, stop, suspend, threadId, toString, yield

Methods inherited from class Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

CommandParser

public CommandParser(Server server)

Constructs a new command parser for a server.

Parameters:

server - the server on which commands will be executed

Method Details

run

public void run()

Specified by:

run in interface Runnable

Overrides:

run in class Thread

getCommands

public List<CommandParser.Command> getCommands()

Returns a list of all of the command this parser can recognize.

Returns:

a list of commands this parser can recognize

getUsage

public String getUsage()

Returns a documentation string showing how to use the commands this parser can recognize.

Returns:

a documentation string

add

public void add(CommandParser.Command command)

Adds a new command to the list of command this parser can recognize.

Parameters:

command - the new command that will be recognized

parse

public void parse(String command)
           throws Exception

Attempts to parse and execute a command from a string, typically one typed into standard input.

Parameters:

command - the string to attempt to parse as a command

Throws:

Exception - if the command cannot be parsed or if a problem occurs when executing the command