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/*
========== licence begin GPL
Copyright (C) 2002-2003 SAP AG
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
========== licence end
*/
package com.sap.dbtech.rte.comm;
import java.sql.SQLException;
import java.util.Properties;
import com.sap.dbtech.util.*;
/**
*
*/
public class NativeComm
extends JdbcCommunication
{
private byte [] nativeStruct;
private String host;
private String dbname;
private String dbroot;
private String pgm;
public final static JdbcCommFactory factory = new JdbcCommFactory () {
public JdbcCommunication open(String host, String dbname, Properties property) throws RTEException {
return new NativeComm (host, dbname);
}
public JdbcCommunication xopen(String host,
String db,
String dbroot,
String pgm,
Properties properties)
throws RTEException
{
return new NativeComm (host, db, dbroot, pgm);
}
};
/**
* creates a new NativeComm
*/
public
NativeComm (
String host,
String dbname)
throws RTEException
{
this.host = host;
this.dbname = dbname;
this.connect ();
}
/**
* creates a new NativeComm
*/
public
NativeComm (
String host,
String dbname,
String dbroot,
String pgm)
throws RTEException
{
this.host = host;
this.dbname = dbname;
this.dbroot= dbroot;
this.pgm = pgm;
this.connectX ();
}
/**
*
*/
public native boolean isChallengeResponseSupportedNative() throws SQLException ;
public native void
connect ()
throws RTEException;
public native void
connectX ()
throws RTEException;
/**
* cancels a pending request.
*/
public native void cancel () throws java.sql.SQLException;
/**
* gets a new request packet.
* @return StructuredMem
*/
public native StructuredMem getRequestPacket ();
/**
* test whether the connection is still valid.
* @return boolean
*/
public native boolean isConnected ();
/**
* blocks while waiting for a reply
* @return StructuredMem
* @exception com.sap.dbtech.rte.comm.RTEException.
*/
public native StructuredMem receive () throws RTEException;
/**
* tries to reconnect after a timeout.
* @exception com.sap.dbtech.rte.comm.RTEException.
*/
public native void reconnect () throws RTEException;
/**
* closes the connection.
*/
public native void release ();
/**
* send a new request to the server.
* @param userPacket StructuredMem
* @param len int
* @exception com.sap.dbtech.rte.comm.RTEException.
*/
public void request (StructuredMem userPacket, int len)
throws RTEException
{
this.rawRequest (userPacket. getBytes (0, len), len);
}
/**
* send a new request to the server.
* @param userPacket byte []
* @param len int
* @exception com.sap.dbtech.rte.comm.RTEException.
*/
public native void rawRequest (byte [] userPacket, int len) throws RTEException;
/**
*
*/
public void
finalize ()
{
this.release ();
}
/* (non-Javadoc)
* @see com.sap.dbtech.rte.comm.JdbcCommunication#isChallengeResponseSupported()
*/
public boolean isChallengeResponseSupported() throws SQLException {
try {
return isChallengeResponseSupportedNative();
} catch (java.lang.UnsatisfiedLinkError e) {
return false;
}
}
}
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