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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Transaction Manager.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corp.
* Portions created by the Initial Developer are Copyright (C) 2003
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* John Gaunt <jgaunt@netscape.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "plstr.h"
#include "tmQueue.h"
#include "tmTransaction.h"
#include "tmTransactionManager.h"
#include "tmUtils.h"
///////////////////////////////////////////////////////////////////////////////
// Constructors & Destructor
tmQueue::~tmQueue() {
// empty the vectors
PRUint32 index = 0;
PRUint32 size = mTransactions.Size();
for ( ; index < size ; index++) {
if (mTransactions[index])
delete (tmTransaction *)mTransactions[index];
}
// don't need to delete the mListeners because
// we just insert PRUint32s, no allocation
mTM = nsnull;
mID = 0;
if (mName)
PL_strfree(mName);
}
///////////////////////////////////////////////////////////////////////////////
// Public Methods
PRInt32
tmQueue::Init(const char* aName, PRUint32 aID, tmTransactionManager *aTM) {
PR_ASSERT(mTM == nsnull);
if (NS_SUCCEEDED(mTransactions.Init()) &&
NS_SUCCEEDED(mListeners.Init()) &&
((mName = PL_strdup(aName)) != nsnull) ) {
mTM = aTM;
mID = aID;
return NS_OK;
}
return -1;
}
PRInt32
tmQueue::AttachClient(PRUint32 aClientID) {
PRInt32 status = NS_OK; // success of adding client
if (!IsAttached(aClientID)) {
// add the client to the listener list -- null safe call
status = mListeners.Append((void*) aClientID);
}
else
status = -2;
// create & init a reply transaction
tmTransaction trans;
if (NS_SUCCEEDED(trans.Init(aClientID, // owner's ipc ID
mID, // client gets our ID
TM_ATTACH_REPLY, // action
status, // success of the add
(PRUint8*)mName, // client matches name to ID
PL_strlen(mName)+1))) {
// send the reply
mTM->SendTransaction(aClientID, &trans);
}
// if we successfully added the client - send all current transactions
if (status >= 0) { // append returns the index of the added element
PRUint32 size = mTransactions.Size();
for (PRUint32 index = 0; index < size; index++) {
if (mTransactions[index])
mTM->SendTransaction(aClientID, (tmTransaction*) mTransactions[index]);
}
}
return status;
}
PRInt32
tmQueue::DetachClient(PRUint32 aClientID) {
PRUint32 size = mListeners.Size();
PRUint32 id = 0;
PRInt32 status = -1;
for (PRUint32 index = 0; index < size; index++) {
id = (PRUint32)NS_PTR_TO_INT32(mListeners[index]);
if(id == aClientID) {
mListeners.RemoveAt(index);
status = NS_OK;
break;
}
}
tmTransaction trans;
if (NS_SUCCEEDED(trans.Init(aClientID,
mID,
TM_DETACH_REPLY,
status,
nsnull,
0))) {
// send the reply
mTM->SendTransaction(aClientID, &trans);
}
// if we've removed all the listeners, remove the queue.
if (mListeners.Size() == 0)
return TM_SUCCESS_DELETE_QUEUE;
return status;
}
void
tmQueue::FlushQueue(PRUint32 aClientID) {
if(!IsAttached(aClientID))
return;
PRUint32 size = mTransactions.Size();
for (PRUint32 index = 0; index < size; index++)
if (mTransactions[index])
delete (tmTransaction*)mTransactions[index];
mTransactions.Clear();
tmTransaction trans;
if (NS_SUCCEEDED(trans.Init(aClientID,
mID,
TM_FLUSH_REPLY,
NS_OK,
nsnull,
0))) {
mTM->SendTransaction(aClientID, &trans);
}
}
PRInt32
tmQueue::PostTransaction(tmTransaction *aTrans) {
PRInt32 status = -1;
PRUint32 ownerID = aTrans->GetOwnerID();
// if we are attached, have the right queue and have successfully
// appended the transaction to the queue, send the transaction
// to all the listeners.
if (IsAttached(ownerID) && aTrans->GetQueueID() == mID)
status = mTransactions.Append(aTrans);
if (status >= 0) {
// send the transaction to all members of mListeners except the owner
PRUint32 size = mListeners.Size();
PRUint32 id = 0;
for (PRUint32 index = 0; index < size; index++) {
id = (PRUint32)NS_PTR_TO_INT32(mListeners[index]);
if (ownerID != id)
mTM->SendTransaction(id, aTrans);
}
}
tmTransaction trans;
if (NS_SUCCEEDED(trans.Init(ownerID,
mID,
TM_POST_REPLY,
status,
nsnull,
0))) {
// send the reply
mTM->SendTransaction(ownerID, &trans);
}
return status;
}
PRBool
tmQueue::IsAttached(PRUint32 aClientID) {
// XXX could be an issue if the aClientID is 0 and there
// is a "hole" in the mListeners vector. - may NEED to store PRUint32*s
PRUint32 size = mListeners.Size();
for (PRUint32 index = 0; index < size; index++) {
if (aClientID == (PRUint32)NS_PTR_TO_INT32(mListeners[index]))
return PR_TRUE;
}
return PR_FALSE;
}
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