From 366b7287350d47f788a0d1af1a1bf73328e4ec1f Mon Sep 17 00:00:00 2001
From: "Carl C. Trieloff" <cctrieloff@apache.org>
Date: Mon, 27 Aug 2007 15:25:17 +0000
Subject: - cache the exchange on a given Channel

git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk/qpid@570152 13f79535-47bb-0310-9956-ffa450edef68
---
 cpp/src/qpid/broker/BrokerChannel.cpp | 20 +++++++++++++++-----
 cpp/src/qpid/broker/BrokerChannel.h   |  5 +++++
 2 files changed, 20 insertions(+), 5 deletions(-)

(limited to 'cpp/src')

diff --git a/cpp/src/qpid/broker/BrokerChannel.cpp b/cpp/src/qpid/broker/BrokerChannel.cpp
index 0dc4bed661..11d8db73f8 100644
--- a/cpp/src/qpid/broker/BrokerChannel.cpp
+++ b/cpp/src/qpid/broker/BrokerChannel.cpp
@@ -335,15 +335,25 @@ void Channel::complete(Message::shared_ptr msg) {
     }
 }
 
+
+
 void Channel::route(Message::shared_ptr msg, Deliverable& strategy) {
-    Exchange::shared_ptr exchange = connection.broker.getExchanges().get(msg->getExchange());
-    assert(exchange.get());
-    exchange->route(strategy, msg->getRoutingKey(), &(msg->getApplicationHeaders()));
+
+    std::string routeToExchangeName = msg->getExchange();
+    // cache the exchange lookup
+    if (!cacheExchange.get() || cacheExchangeName != routeToExchangeName){
+       cacheExchangeName = routeToExchangeName;
+       cacheExchange = connection.broker.getExchanges().get(routeToExchangeName);
+    }
+
+    assert(cacheExchange.get());
+    cacheExchange->route(strategy, msg->getRoutingKey(), &(msg->getApplicationHeaders()));
+
     if (!strategy.delivered) {
         //TODO:if reject-unroutable, then reject
         //else route to alternate exchange
-        if (exchange->getAlternate()) {
-            exchange->getAlternate()->route(strategy, msg->getRoutingKey(), &(msg->getApplicationHeaders()));
+        if (cacheExchange->getAlternate()) {
+            cacheExchange->getAlternate()->route(strategy, msg->getRoutingKey(), &(msg->getApplicationHeaders()));
         }
     }
 
diff --git a/cpp/src/qpid/broker/BrokerChannel.h b/cpp/src/qpid/broker/BrokerChannel.h
index 021110cf8c..fcfcd73679 100644
--- a/cpp/src/qpid/broker/BrokerChannel.h
+++ b/cpp/src/qpid/broker/BrokerChannel.h
@@ -74,6 +74,7 @@ class Channel : public CompletionHandler
         bool blocked;
         bool windowing;
         uint32_t msgCredit;
+	
         uint32_t byteCredit;
 
       public:
@@ -116,6 +117,10 @@ class Channel : public CompletionHandler
     MessageBuilder messageBuilder;//builder for in-progress message
     bool opened;
     bool flowActive;
+    
+    std::string cacheExchangeName;       // pair holds last exchange used for routing
+    Exchange::shared_ptr cacheExchange;
+    
     void route(Message::shared_ptr msg, Deliverable& strategy);
     void complete(Message::shared_ptr msg);// completion handler for MessageBuilder
     void record(const DeliveryRecord& delivery);
-- 
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