tests/failover_soak: run a cluster with clients, kill and restart cluster members, verify client fail-over.

git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk/qpid@719055 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 163 insertions, 0 deletions

diff --git a/cpp/src/tests/resuming_receiver.cpp b/cpp/src/tests/resuming_receiver.cpp
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+++ b/cpp/src/tests/resuming_receiver.cpp
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+/*
+ *
+ * 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 <qpid/client/FailoverManager.h>
+#include <qpid/client/Session.h>
+#include <qpid/client/Message.h>
+#include <qpid/client/SubscriptionManager.h>
+
+#include <iostream>
+#include <fstream>
+
+
+using namespace qpid;
+using namespace qpid::client;
+using namespace qpid::framing;
+
+using namespace std;
+
+
+class Listener : public MessageListener, 
+                 public FailoverManager::Command, 
+                 public FailoverManager::ReconnectionStrategy
+{
+  public:
+    Listener ( int report_frequency = 1000, int verbosity = 0 );
+    void received(Message& message);
+    void execute(AsyncSession& session, bool isRetry);
+    void check();
+    void editUrlList(std::vector<Url>& urls);
+  private:
+    Subscription subscription;
+    uint count;
+    uint received_twice;
+    uint lastSn;
+    bool gaps;
+    uint  reportFrequency;
+    int  verbosity;
+};
+
+
+Listener::Listener(int freq, int verbosity) 
+  : count(0), 
+    received_twice(0), 
+    lastSn(0), 
+    gaps(false), 
+    reportFrequency(freq),
+    verbosity(verbosity)
+{}
+
+
+void Listener::received(Message & message) 
+{
+    if (message.getData() == "That's all, folks!") 
+    {
+        if(verbosity > 0 )
+        {
+            std::cout << "Shutting down listener for " 
+                      << message.getDestination() << std::endl;
+
+            std::cout << "Listener received " 
+                      << count 
+                      << " messages (" 
+                      << received_twice 
+                      << " received_twice)" 
+                      << endl;
+        }
+        subscription.cancel();
+        if ( verbosity > 0 )
+          std::cout << "LISTENER COMPLETED\n";
+    } else {
+        uint sn = message.getHeaders().getAsInt("sn");
+        if (lastSn < sn) {
+            if (sn - lastSn > 1) {
+                std::cerr << "Error: gap in sequence between " << lastSn << " and " << sn << std::endl;
+                gaps = true;
+            }
+            lastSn = sn;
+            ++count;
+            if ( ! ( count % reportFrequency ) ) {
+                if ( verbosity > 0 )
+                    std::cout << "Listener has received " 
+                              << count 
+                              << " messages.\n";
+            }
+        } else {
+            ++received_twice;
+        }
+    }
+}
+
+void Listener::check()
+{
+    if (gaps) throw Exception("Detected gaps in sequence; messages appear to have been lost.");
+}
+
+void Listener::execute(AsyncSession& session, bool isRetry)
+{
+    if (isRetry) {
+        // std::cout << "Resuming from " << count << std::endl;
+    }
+    SubscriptionManager subs(session);
+    subscription = subs.subscribe(*this, "message_queue");
+    subs.run();
+}
+
+void Listener::editUrlList(std::vector<Url>& urls)
+{
+    /**
+     * A more realistic algorithm would be to search through the list
+     * for prefered hosts and ensure they come first in the list.
+     */
+    if (urls.size() > 1) std::rotate(urls.begin(), urls.begin() + 1, urls.end());
+}
+
+int main(int argc, char ** argv)
+{
+    ConnectionSettings settings;
+
+    if ( argc != 5 )
+    {
+      std::cerr << "Usage: resuming_receiver host port report_frequency verbosity\n";
+      return 1;
+    }
+
+    settings.host       = argv[1];
+    settings.port       = atoi(argv[2]);
+    int reportFrequency = atoi(argv[3]);
+    int verbosity       = atoi(argv[4]);
+
+    Listener listener(reportFrequency, verbosity);
+    FailoverManager connection(settings, &listener);
+
+    try {
+        connection.execute(listener);
+        connection.close();
+        listener.check();
+        return 0;
+    } catch(const std::exception& error) {
+        std::cerr << "Receiver failed: " << error.what() << std::endl;
+    }
+    return 1;
+}
+
+
+