/** * Find the transaction corresponding to a given request. * * @param sipMessage request for which to retrieve the transaction. * @param isServer search the server transaction table if true. * @return the transaction object corresponding to the request or null if no such mapping exists. */ public SIPTransaction findTransaction(SIPMessage sipMessage, boolean isServer) { SIPTransaction retval = null; if (isServer) { Via via = sipMessage.getTopmostVia(); if (via.getBranch() != null) { String key = sipMessage.getTransactionId(); synchronized (this.serverTransactionTable) { retval = (SIPTransaction) serverTransactionTable.get(key); if (LogWriter.needsLogging) logMessage("looking for key " + key); if (retval != null && retval.isMessagePartOfTransaction(sipMessage)) return retval; } } // Need to scan the table for old style transactions (RFC 2543 // style) synchronized (this.serverTransactions) { Iterator<SIPServerTransaction> it = serverTransactions.iterator(); while (it.hasNext()) { SIPServerTransaction sipServerTransaction = (SIPServerTransaction) it.next(); if (sipServerTransaction.isMessagePartOfTransaction(sipMessage)) return sipServerTransaction; } } } else { Via via = sipMessage.getTopmostVia(); if (via.getBranch() != null) { String key = sipMessage.getTransactionId(); synchronized (this.clientTransactionTable) { retval = (SIPTransaction) clientTransactionTable.get(key); if (retval != null && retval.isMessagePartOfTransaction(sipMessage)) return retval; } } // Need to scan the table for old style transactions (RFC 2543 // style) synchronized (this.clientTransactions) { Iterator<SIPClientTransaction> it = clientTransactions.iterator(); while (it.hasNext()) { SIPClientTransaction clientTransaction = (SIPClientTransaction) it.next(); if (clientTransaction.isMessagePartOfTransaction(sipMessage)) return clientTransaction; } } } return null; }