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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2001 by Sun Microsystems, Inc.
* All rights reserved.
*
*/
// ClientMsgManager.java:Manages versioned client message creation in server
// Author: James Kempf
// Created On: Thu Sep 17 10:16:33 1998
// Last Modified By: James Kempf
// Last Modified On: Tue Oct 13 15:26:16 1998
// Update Count: 8
//
package com.sun.slp;
import java.util.*;
/**
* The ClientMsgManager class manages creation of client messages in the
* slpd server. Client messages are needed for active DA advertisement
* solicitation, and for forwarding of registrations and deregistrations
* from the SA server to DAs. This class creates the appropriately
* versioned message instance, based on the arguments. It also
* sets the header variables. It is up to the caller to set the
* instance variables in the object itself.
*
* @author James Kempf
*/
abstract class ClientMsgManager extends Object {
// The class table contains classes registered for particular versions
// and message types.
private static Hashtable classTable = new Hashtable();
// Register a new message type class and version.
static void addClientMsgClass(String className,
int version,
String keyName) {
// Create the key.
String key = makeClassKey(keyName, version);
try {
Class headerClass = Class.forName(className);
classTable.put(headerClass, key);
} catch (ClassNotFoundException ex) {
Assert.slpassert(false,
"no_class",
new Object[] {className});
}
}
// Return the appropriately versioned object, with instance variables
// set in the header.
static SrvLocMsg
newInstance(String keyName,
int version,
boolean isTCP)
throws ServiceLocationException {
try {
// Get header class.
Class msgClass =
(Class)classTable.get(makeClassKey(keyName, version));
if (msgClass == null) {
throw
new ServiceLocationException(
ServiceLocationException.INTERNAL_ERROR,
"cmm_creation_error",
new Object[] { keyName,
new Integer(version)});
}
SrvLocMsg msg = (SrvLocMsg)msgClass.newInstance();
// Set the packet length. If we've come via TCP, we don't
// need to set it.
SrvLocHeader hdr = msg.getHeader();
if (!isTCP) {
hdr.packetLength = SLPConfig.getSLPConfig().getMTU();
}
return msg;
} catch (Exception ex) {
throw
new ServiceLocationException(
ServiceLocationException.INTERNAL_ERROR,
"cmm_creation_exception",
new Object[] { ex,
keyName,
new Integer(version),
ex.getMessage()});
}
}
// Create the key for the hashtable.
private static String makeClassKey(String className, int version) {
return className + version;
}
}
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