ZMQ lib change.

common/zmqclient.cpp

@@ -25,6 +25,12 @@ ZmqClient::ZmqClient(const std::string& endpoint, const std::string& vrf)
     initialize(endpoint, vrf);
 }
 
+ZmqClient::ZmqClient(const std::string& endpoint, uint32_t waitTimeMs)
+: m_waitTimeMs(waitTimeMs)
+{
+    initialize(endpoint);
+}
+
 ZmqClient::~ZmqClient()
 {
     std::lock_guard<std::mutex> lock(m_socketMutex);
@@ -55,7 +61,7 @@ void ZmqClient::initialize(const std::string& endpoint, const std::string& vrf)
 
     connect();
 }
-    
+
 bool ZmqClient::isConnected()
 {
     return m_connected;
@@ -137,7 +143,7 @@ void ZmqClient::sendMsg(
     int zmq_err = 0;
     int retry_delay = 10;
     int rc = 0;
-    for (int i = 0; i <=  MQ_MAX_RETRY; ++i)
+    for (int i = 0; i <= MQ_MAX_RETRY; ++i)
     {
         {
             // ZMQ socket is not thread safe: http://api.zeromq.org/2-1:zmq
@@ -146,7 +152,6 @@ void ZmqClient::sendMsg(
             // Use none block mode to use all bandwidth: http://api.zeromq.org/2-1%3Azmq-send
             rc = zmq_send(m_socket, m_sendbuffer.data(), serializedlen, ZMQ_NOBLOCK);
         }
-
         if (rc >= 0)
         {
             SWSS_LOG_DEBUG("zmq sended %d bytes", serializedlen);
@@ -197,4 +202,14 @@ void ZmqClient::sendMsg(
     throw system_error(make_error_code(errc::io_error), message);
 }
 
+//TODO: To implement the wait() method later.
+// To implement ZMQ_CLIENT and ZMQ_SERVER socket types for response path.
+bool ZmqClient::wait(const std::string& dbName,
+                     const std::string& tableName,
+                     const std::vector<std::shared_ptr<KeyOpFieldsValuesTuple>>& kcos)
+{
+    SWSS_LOG_ENTER();
+
+    return false;
+}
 }

common/zmqclient.h

@@ -12,8 +12,10 @@ namespace swss {
 class ZmqClient
 {
 public:
+
     ZmqClient(const std::string& endpoint);
     ZmqClient(const std::string& endpoint, const std::string& vrf);
+    ZmqClient(const std::string& endpoint, uint32_t waitTimeMs);
     ~ZmqClient();
 
     bool isConnected();
@@ -23,8 +25,13 @@ class ZmqClient
     void sendMsg(const std::string& dbName,
                  const std::string& tableName,
                  const std::vector<KeyOpFieldsValuesTuple>& kcos);
+
+    bool wait(const std::string& dbName,
+              const std::string& tableName,
+              const std::vector<std::shared_ptr<KeyOpFieldsValuesTuple>>& kcos);
+
 private:
-    void initialize(const std::string& endpoint, const std::string& vrf);
+    void initialize(const std::string& endpoint, const std::string& vrf = "");
 
     std::string m_endpoint;
 
@@ -36,8 +43,10 @@ class ZmqClient
 
     bool m_connected;
 
+    uint32_t m_waitTimeMs;
+
     std::mutex m_socketMutex;
-    
+
     std::vector<char> m_sendbuffer;
 };
 

common/zmqproducerstatetable.cpp

@@ -164,6 +164,13 @@ void ZmqProducerStateTable::send(const std::vector<KeyOpFieldsValuesTuple> &kcos
     }
 }
 
+bool ZmqProducerStateTable::wait(const std::string& dbName,
+              const std::string& tableName,
+              const std::vector<std::shared_ptr<KeyOpFieldsValuesTuple>>& kcos)
+{
+    return m_zmqClient.wait(dbName, tableName, kcos);
+}
+
 size_t ZmqProducerStateTable::dbUpdaterQueueSize()
 {
     if (m_asyncDBUpdater == nullptr)

common/zmqproducerstatetable.h

@@ -37,6 +37,11 @@ class ZmqProducerStateTable : public ProducerStateTable
     // Batched send that can include both SET and DEL requests.
     virtual void send(const std::vector<KeyOpFieldsValuesTuple> &kcos);
 
+    // To wait for the response from the peer.
+    virtual bool wait(const std::string& dbName,
+              const std::string& tableName,
+              const std::vector<std::shared_ptr<KeyOpFieldsValuesTuple>>& kcos);
+
     size_t dbUpdaterQueueSize();
 private:
     void initialize(DBConnector *db, const std::string &tableName, bool dbPersistence);

common/zmqserver.cpp

@@ -1,3 +1,4 @@
+#include <unistd.h>
 #include <string>
 #include <deque>
 #include <limits>
@@ -20,6 +21,7 @@ ZmqServer::ZmqServer(const std::string& endpoint, const std::string& vrf)
     : m_endpoint(endpoint),
     m_vrf(vrf)
 {
+    connect();
     m_buffer.resize(MQ_RESPONSE_MAX_COUNT);
     m_runThread = true;
     m_mqPollThread = std::make_shared<std::thread>(&ZmqServer::mqPollThread, this);
@@ -31,6 +33,33 @@ ZmqServer::~ZmqServer()
 {
     m_runThread = false;
     m_mqPollThread->join();
+
+    zmq_close(m_socket);
+    zmq_ctx_destroy(m_context);
+}
+
+void ZmqServer::connect()
+{
+    SWSS_LOG_ENTER();
+    m_context = zmq_ctx_new();
+    m_socket = zmq_socket(m_context, ZMQ_PULL);
+
+    // Increase recv buffer for use all bandwidth:  http://api.zeromq.org/4-2:zmq-setsockopt
+    int high_watermark = MQ_WATERMARK;
+    zmq_setsockopt(m_socket, ZMQ_RCVHWM, &high_watermark, sizeof(high_watermark));
+
+    if (!m_vrf.empty())
+    {   
+        zmq_setsockopt(m_socket, ZMQ_BINDTODEVICE, m_vrf.c_str(), m_vrf.length());
+    }
+
+    int rc = zmq_bind(m_socket, m_endpoint.c_str());
+    if (rc != 0)
+    {
+        SWSS_LOG_THROW("zmq_bind failed on endpoint: %s, zmqerrno: %d",
+            m_endpoint.c_str(),
+            zmq_errno());
+    }
 }
 
 void ZmqServer::registerMessageHandler(
@@ -90,40 +119,19 @@ void ZmqServer::mqPollThread()
     SWSS_LOG_ENTER();
     SWSS_LOG_NOTICE("mqPollThread begin");
 
-    // Producer/Consumer state table are n:1 mapping, so need use PUSH/PULL pattern http://api.zeromq.org/master:zmq-socket
-    void* context = zmq_ctx_new();;
-    void* socket = zmq_socket(context, ZMQ_PULL);
-
-    // Increase recv buffer for use all bandwidth:  http://api.zeromq.org/4-2:zmq-setsockopt
-    int high_watermark = MQ_WATERMARK;
-    zmq_setsockopt(socket, ZMQ_RCVHWM, &high_watermark, sizeof(high_watermark));
-
-    if (!m_vrf.empty())
-    {
-        zmq_setsockopt(socket, ZMQ_BINDTODEVICE, m_vrf.c_str(), m_vrf.length());
-    }
-
-    int rc = zmq_bind(socket, m_endpoint.c_str());
-    if (rc != 0)
-    {
-        SWSS_LOG_THROW("zmq_bind failed on endpoint: %s, zmqerrno: %d, message: %s",
-                m_endpoint.c_str(),
-                zmq_errno(),
-                strerror(zmq_errno()));
-    }
-
     // zmq_poll will use less CPU
     zmq_pollitem_t poll_item;
     poll_item.fd = 0;
-    poll_item.socket = socket;
+    poll_item.socket = m_socket;
     poll_item.events = ZMQ_POLLIN;
     poll_item.revents = 0;
 
     SWSS_LOG_NOTICE("bind to zmq endpoint: %s", m_endpoint.c_str());
+    SWSS_LOG_DEBUG("m_runThread: %d", m_runThread);
     while (m_runThread)
     {
         // receive message
-        rc = zmq_poll(&poll_item, 1, 1000);
+        auto rc = zmq_poll(&poll_item, 1, 1000);
         if (rc == 0 || !(poll_item.revents & ZMQ_POLLIN))
         {
             // timeout or other event
@@ -132,7 +140,7 @@ void ZmqServer::mqPollThread()
         }
 
         // receive message
-        rc = zmq_recv(socket, m_buffer.data(), MQ_RESPONSE_MAX_COUNT, ZMQ_DONTWAIT);
+        rc = zmq_recv(m_socket, m_buffer.data(), MQ_RESPONSE_MAX_COUNT, ZMQ_DONTWAIT);
         if (rc < 0)
         {
             int zmq_err = zmq_errno();
@@ -160,11 +168,15 @@ void ZmqServer::mqPollThread()
         // deserialize and write to redis:
         handleReceivedData(m_buffer.data(), rc);
     }
+    SWSS_LOG_NOTICE("mqPollThread end");
+}
 
-    zmq_close(socket);
-    zmq_ctx_destroy(context);
+//TODO: To implement the sendMsg() method later.
+void ZmqServer::sendMsg(const std::string& dbName, const std::string& tableName,
+        const std::vector<swss::KeyOpFieldsValuesTuple>& values)
+{
 
-    SWSS_LOG_NOTICE("mqPollThread end");
+    return;
 }
 
 }

common/zmqserver.h

@@ -39,7 +39,13 @@ class ZmqServer
                                 const std::string tableName,
                                 ZmqMessageHandler* handler);
 
+    void sendMsg(const std::string& dbName, const std::string& tableName,
+        const std::vector<swss::KeyOpFieldsValuesTuple>& values);
+
 private:
+
+    void connect();
+
     void handleReceivedData(const char* buffer, const size_t size);
 
     void mqPollThread();
@@ -56,6 +62,10 @@ class ZmqServer
 
     std::string m_vrf;
 
+    void* m_context;
+
+    void* m_socket;
+
     std::map<std::string, std::map<std::string, ZmqMessageHandler*>> m_HandlerMap;
 };
 

tests/c_api_ut.cpp

@@ -221,9 +221,7 @@ TEST(c_api, SubscriberStateTable) {
 TEST(c_api, ZmqConsumerProducerStateTable) {
     clearDB();
     SWSSStringManager sm;
-
     SWSSDBConnector db = SWSSDBConnector_new_named("TEST_DB", 1000, true);
-
     SWSSZmqServer srv = SWSSZmqServer_new("tcp://127.0.0.1:42312");
     SWSSZmqClient cli = SWSSZmqClient_new("tcp://127.0.0.1:42312");
     EXPECT_TRUE(SWSSZmqClient_isConnected(cli));
@@ -267,6 +265,7 @@ TEST(c_api, ZmqConsumerProducerStateTable) {
                 SWSSZmqProducerStateTable_set(pst, arr.data[i].key, arr.data[i].fieldValues);
         else
             SWSSZmqClient_sendMsg(cli, "TEST_DB", "mytable", arr);
+        sleep(2);
 
         ASSERT_EQ(SWSSZmqConsumerStateTable_readData(cst, 1500, true), SWSSSelectResult_DATA);
         arr = SWSSZmqConsumerStateTable_pops(cst);
@@ -305,6 +304,7 @@ TEST(c_api, ZmqConsumerProducerStateTable) {
                 SWSSZmqProducerStateTable_del(pst, arr.data[i].key);
         else
             SWSSZmqClient_sendMsg(cli, "TEST_DB", "mytable", arr);
+        sleep(2);
 
         ASSERT_EQ(SWSSZmqConsumerStateTable_readData(cst, 500, true), SWSSSelectResult_DATA);
         arr = SWSSZmqConsumerStateTable_pops(cst);