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Rserve is a TCP/IP server which allows other programs to use facilities of R (see www.r-project.org) from various languages without the need to initialize R or link against R library. Every connection has a separate workspace and working directory. Client-side implementations are available for popular languages such as C/C++, PHP and Java. Rserve supports remote connection, authentication and file transfer. Typical use is to integrate R backend for computation of statstical models, plots etc. in other applications.

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package org.rosuda.REngine;

/** interface defining delegate methods used by {@link REngine} to forward console history callbacks from R. */
public interface REngineConsoleHistoryInterface {
	/** called when R wants to save the history content.
	 *  @param eng calling engine
	 *  @param filename name of the file to save command history to
	 */
	public void   RSaveHistory  (REngine eng, String filename);	
	
	/** called when R wants to load the history content.
	 *  @param eng calling engine
	 *  @param filename name of the file to load the command history from
	 */
	public void   RLoadHistory  (REngine eng, String filename);
}