From 165d9cb4734734882082d472db91aabc846c6909 Mon Sep 17 00:00:00 2001
From: Gordon Sim <gsim@apache.org>
Date: Tue, 27 Apr 2010 14:09:31 +0000
Subject: QPID-664: allow safe closing of session as part of handling a session
 exception

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk/qpid@938460 13f79535-47bb-0310-9956-ffa450edef68
---
 cpp/src/qpid/client/SessionImpl.cpp          |  6 +++++
 cpp/src/qpid/client/SessionImpl.h            |  1 +
 cpp/src/qpid/client/amqp0_10/SessionImpl.cpp | 36 ++++++++++++++++++----------
 cpp/src/qpid/client/amqp0_10/SessionImpl.h   |  1 +
 4 files changed, 31 insertions(+), 13 deletions(-)

(limited to 'cpp/src/qpid')

diff --git a/cpp/src/qpid/client/SessionImpl.cpp b/cpp/src/qpid/client/SessionImpl.cpp
index 05d90b4314..b7ff4307b6 100644
--- a/cpp/src/qpid/client/SessionImpl.cpp
+++ b/cpp/src/qpid/client/SessionImpl.cpp
@@ -789,6 +789,12 @@ void SessionImpl::assertOpen() const
     checkOpen();
 }
 
+bool SessionImpl::hasError() const
+{
+    Lock l(state);
+    return !exceptionHolder.empty();
+}
+
 void SessionImpl::handleClosed()
 {
     demux.close(exceptionHolder.empty() ?
diff --git a/cpp/src/qpid/client/SessionImpl.h b/cpp/src/qpid/client/SessionImpl.h
index 2f35032c4e..7259bc0733 100644
--- a/cpp/src/qpid/client/SessionImpl.h
+++ b/cpp/src/qpid/client/SessionImpl.h
@@ -84,6 +84,7 @@ public:
     void suspend();
 
     void assertOpen() const;
+    bool hasError() const;
 
     Future send(const framing::AMQBody& command);
     Future send(const framing::AMQBody& command, const framing::MethodContent& content);
diff --git a/cpp/src/qpid/client/amqp0_10/SessionImpl.cpp b/cpp/src/qpid/client/amqp0_10/SessionImpl.cpp
index 15a936465b..a55a2737cb 100644
--- a/cpp/src/qpid/client/amqp0_10/SessionImpl.cpp
+++ b/cpp/src/qpid/client/amqp0_10/SessionImpl.cpp
@@ -61,6 +61,12 @@ void SessionImpl::checkError()
     s.get()->assertOpen();
 }
 
+bool SessionImpl::hasError()
+{
+    qpid::client::SessionBase_0_10Access s(session);
+    return s.get()->hasError();
+}
+
 void SessionImpl::sync(bool block)
 {
     if (block) retry<Sync>();
@@ -105,22 +111,26 @@ void SessionImpl::release(qpid::messaging::Message& m)
 
 void SessionImpl::close()
 {
-    //close all the senders and receivers (get copy of names and then
-    //make the calls to avoid modifying maps while iterating over
-    //them):
-    std::vector<std::string> s;
-    std::vector<std::string> r;
-    {
-        qpid::sys::Mutex::ScopedLock l(lock);        
-        for (Senders::const_iterator i = senders.begin(); i != senders.end(); ++i) s.push_back(i->first);
-        for (Receivers::const_iterator i = receivers.begin(); i != receivers.end(); ++i) r.push_back(i->first);
+    if (hasError()) {
+        senders.clear();
+        receivers.clear();
+    } else {
+        //close all the senders and receivers (get copy of names and then
+        //make the calls to avoid modifying maps while iterating over
+        //them):
+        std::vector<std::string> s;
+        std::vector<std::string> r;
+        {
+            qpid::sys::Mutex::ScopedLock l(lock);        
+            for (Senders::const_iterator i = senders.begin(); i != senders.end(); ++i) s.push_back(i->first);
+            for (Receivers::const_iterator i = receivers.begin(); i != receivers.end(); ++i) r.push_back(i->first);
+        }
+        for (std::vector<std::string>::const_iterator i = s.begin(); i != s.end(); ++i) getSender(*i).close();
+        for (std::vector<std::string>::const_iterator i = r.begin(); i != r.end(); ++i) getReceiver(*i).close();
     }
-    for (std::vector<std::string>::const_iterator i = s.begin(); i != s.end(); ++i) getSender(*i).close();
-    for (std::vector<std::string>::const_iterator i = r.begin(); i != r.end(); ++i) getReceiver(*i).close();
-    
     
     connection->closed(*this);
-    session.close();
+    if (!hasError()) session.close();
 }
 
 template <class T, class S> boost::intrusive_ptr<S> getImplPtr(T& t)
diff --git a/cpp/src/qpid/client/amqp0_10/SessionImpl.h b/cpp/src/qpid/client/amqp0_10/SessionImpl.h
index 0613074f7c..bc02f0ff8b 100644
--- a/cpp/src/qpid/client/amqp0_10/SessionImpl.h
+++ b/cpp/src/qpid/client/amqp0_10/SessionImpl.h
@@ -76,6 +76,7 @@ class SessionImpl : public qpid::messaging::SessionImpl
 
     qpid::messaging::Connection getConnection() const;
     void checkError();
+    bool hasError();
 
     bool get(ReceiverImpl& receiver, qpid::messaging::Message& message, qpid::messaging::Duration timeout);    
 
-- 
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