com.martiansoftware.nailgun

Class NGContext


public class NGContext
extends Object

Provides quite a bit of potentially useful information to classes specifically written for NailGun. The NailGun server itself, its AliasManager, the remote client's environment variables, and other information is available via this class. For all intents and purposes, the NGContext represents a single connection from a NailGun client. If a class is written with a

 public static void nailMain(NGContext context)
 
method, that method will be called by NailGun instead of the traditional main(String[]) method normally used for programs. A fully populated NGContext object will then be provided to nailMain().
Author:
Marty Lamb

Field Summary

PrintStream
err
The client's stderr
InputStream
in
The client's stdin
PrintStream
out
The client's stdout

Method Summary

void
assertLocalClient()
Throws a java.lang.SecurityException if the client is not connected from the local machine.
void
assertLoopbackClient()
Throws a java.lang.SecurityException if the client is not connected via the loopback address.
void
exit(int exitCode)
Sends an exit command with the specified exit code to the client.
String[]
getArgs()
Returns the command line arguments for the command implementation (nail) on the server.
String
getCommand()
Returns the command that was issued by the client (either an alias or the name of a class).
Properties
getEnv()
Returns a java.util.Properties object containing a copy of the client's environment variables
String
getFileSeparator()
Returns the file separator ('/' or '\\') used by the client's os.
InetAddress
getInetAddress()
Returns the address of the client at the other side of this connection.
NGServer
getNGServer()
Returns the NGServer that accepted this connection
String
getPathSeparator()
Returns the path separator (':' or ';') used by the client's os.
int
getPort()
Returns the port on the client connected to the NailGun server.
String
getWorkingDirectory()
Returns the current working directory of the client, as reported by the client.

Field Details

err

public PrintStream err
The client's stderr

in

public InputStream in
The client's stdin

out

public PrintStream out
The client's stdout

Method Details

assertLocalClient

public void assertLocalClient()
Throws a java.lang.SecurityException if the client is not connected from the local machine.

assertLoopbackClient

public void assertLoopbackClient()
Throws a java.lang.SecurityException if the client is not connected via the loopback address.

exit

public void exit(int exitCode)
Sends an exit command with the specified exit code to the client. The client will exit immediately with the specified exit code; you probably want to return from nailMain immediately after calling this.
Parameters:
exitCode - the exit code with which the client should exit

getArgs

public String[] getArgs()
Returns the command line arguments for the command implementation (nail) on the server.
Returns:
the command line arguments for the command implementation (nail) on the server.

getCommand

public String getCommand()
Returns the command that was issued by the client (either an alias or the name of a class). This allows multiple aliases to point to the same class but result in different behaviors.
Returns:
the command issued by the client

getEnv

public Properties getEnv()
Returns a java.util.Properties object containing a copy of the client's environment variables
Returns:
a java.util.Properties object containing a copy of the client's environment variables

getFileSeparator

public String getFileSeparator()
Returns the file separator ('/' or '\\') used by the client's os.
Returns:
the file separator ('/' or '\\') used by the client's os.

getInetAddress

public InetAddress getInetAddress()
Returns the address of the client at the other side of this connection.
Returns:
the address of the client at the other side of this connection.

getNGServer

public NGServer getNGServer()
Returns the NGServer that accepted this connection
Returns:
the NGServer that accepted this connection

getPathSeparator

public String getPathSeparator()
Returns the path separator (':' or ';') used by the client's os.
Returns:
the path separator (':' or ';') used by the client's os.

getPort

public int getPort()
Returns the port on the client connected to the NailGun server.
Returns:
the port on the client connected to the NailGun server.

getWorkingDirectory

public String getWorkingDirectory()
Returns the current working directory of the client, as reported by the client. This is a String that will use the client's File.separator ('/' or '\'), which may differ from the separator on the server.
Returns:
the current working directory of the client

© 2004, Martian Software, Inc.