1 files changed, 172 insertions, 0 deletions
diff --git a/qpid/cpp/lib/client/IncomingMessage.cpp b/qpid/cpp/lib/client/IncomingMessage.cpp
new file mode 100644
index 0000000000..07f94ceb64
--- /dev/null
+++ b/qpid/cpp/lib/client/IncomingMessage.cpp
@@ -0,0 +1,172 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+#include <IncomingMessage.h>
+#include "framing/AMQHeaderBody.h"
+#include "framing/AMQContentBody.h"
+#include "BasicGetOkBody.h"
+#include "BasicReturnBody.h"
+#include "BasicDeliverBody.h"
+#include <QpidError.h>
+#include <iostream>
+
+namespace qpid {
+namespace client {
+
+using namespace sys;
+using namespace framing;
+
+struct IncomingMessage::Guard: public Mutex::ScopedLock {
+    Guard(IncomingMessage* im) : Mutex::ScopedLock(im->lock) {
+        im->shutdownError.throwIf();
+    }
+};
+
+IncomingMessage::IncomingMessage() { reset(); }
+
+void IncomingMessage::reset() {
+    state = &IncomingMessage::expectRequest;
+    endFn= &IncomingMessage::endRequest;
+    buildMessage = Message();
+}
+    
+void IncomingMessage::startGet() {
+    Guard g(this);
+    if (state != &IncomingMessage::expectRequest) {
+        endGet(new QPID_ERROR(CLIENT_ERROR, "Message already in progress."));
+    }
+    else {
+        state = &IncomingMessage::expectGetOk;
+        endFn = &IncomingMessage::endGet;
+        getError.reset();
+        getState = GETTING;
+    }
+}
+
+bool IncomingMessage::waitGet(Message& msg) {
+    Guard g(this);
+    while (getState == GETTING && !shutdownError && !getError)
+        getReady.wait(lock);
+    shutdownError.throwIf();
+    getError.throwIf();
+    msg = getMessage;
+    return getState==GOT;
+}
+
+Message IncomingMessage::waitDispatch() {
+    Guard g(this);
+    while(dispatchQueue.empty() && !shutdownError)
+        dispatchReady.wait(lock);
+    shutdownError.throwIf();
+
+    Message msg(dispatchQueue.front());
+    dispatchQueue.pop();
+    return msg;
+}
+
+void IncomingMessage::add(BodyPtr body) {
+    Guard g(this);
+    shutdownError.throwIf();
+    // Call the current state function.
+    (this->*state)(body);
+}
+
+void IncomingMessage::shutdown() {
+    Mutex::ScopedLock l(lock);
+    shutdownError.reset(new ShutdownException());
+    getReady.notify();
+    dispatchReady.notify();
+}
+
+bool IncomingMessage::isShutdown() const {
+    Mutex::ScopedLock l(lock);
+    return shutdownError;
+}
+
+// Common check for all the expect functions. Called in network thread.
+template<class T>
+boost::shared_ptr<T> IncomingMessage::expectCheck(BodyPtr body) {
+    boost::shared_ptr<T> ptr = boost::dynamic_pointer_cast<T>(body);
+    if (!ptr) 
+        throw QPID_ERROR(PROTOCOL_ERROR+504, "Unexpected frame type");
+    return ptr;
+}
+
+void IncomingMessage::expectGetOk(BodyPtr body) {
+    if (dynamic_cast<BasicGetOkBody*>(body.get()))
+        state = &IncomingMessage::expectHeader;
+    else if (dynamic_cast<BasicGetEmptyBody*>(body.get())) {
+        getState = EMPTY;
+        endGet();
+    }
+    else
+        throw QPID_ERROR(PROTOCOL_ERROR+504, "Unexpected frame type");
+}
+
+void IncomingMessage::expectHeader(BodyPtr body) {
+    AMQHeaderBody::shared_ptr header = expectCheck<AMQHeaderBody>(body);
+    buildMessage.header = header;
+    state = &IncomingMessage::expectContent;
+    checkComplete();
+}
+
+void IncomingMessage::expectContent(BodyPtr body) {
+    AMQContentBody::shared_ptr content = expectCheck<AMQContentBody>(body);
+    buildMessage.setData(buildMessage.getData() + content->getData());
+    checkComplete();
+}
+
+void IncomingMessage::checkComplete() {
+    size_t declaredSize = buildMessage.header->getContentSize();
+    size_t currentSize = buildMessage.getData().size();
+    if (declaredSize == currentSize)
+        (this->*endFn)(0);
+    else if (declaredSize < currentSize)
+        (this->*endFn)(new QPID_ERROR(
+                  PROTOCOL_ERROR, "Message content exceeds declared size."));
+}
+
+void IncomingMessage::expectRequest(BodyPtr body) {
+    AMQMethodBody::shared_ptr method = expectCheck<AMQMethodBody>(body);
+    buildMessage.setMethod(method);
+    state = &IncomingMessage::expectHeader;
+}
+    
+void IncomingMessage::endGet(Exception* ex) {
+    getError.reset(ex);
+    if (getState == GETTING) {
+        getMessage = buildMessage;
+        getState = GOT;
+    }
+    reset();
+    getReady.notify();
+}
+
+void IncomingMessage::endRequest(Exception* ex) {
+    ExceptionHolder eh(ex);
+    if (!eh) {
+        dispatchQueue.push(buildMessage);
+        reset();
+        dispatchReady.notify();
+    }
+    eh.throwIf();
+}
+
+}} // namespace qpid::client