diff --git a/trunk/src/app/srs_app_kafka.cpp b/trunk/src/app/srs_app_kafka.cpp
index 03f832429..5c15f1604 100644
--- a/trunk/src/app/srs_app_kafka.cpp
+++ b/trunk/src/app/srs_app_kafka.cpp
@@ -36,10 +36,12 @@ using namespace std;
 #include <srs_kernel_balance.hpp>
 #include <srs_kafka_stack.hpp>
 #include <srs_core_autofree.hpp>
+#include <srs_protocol_json.hpp>
 
 #ifdef SRS_AUTO_KAFKA
 
 #define SRS_KAKFA_CYCLE_INTERVAL_MS 3000
+#define SRS_KAFKA_PRODUCER_AGGREGATE_SIZE 10
 
 std::string srs_kafka_metadata_summary(SrsKafkaTopicMetadataResponse* metadata)
 {
@@ -144,6 +146,33 @@ string SrsKafkaPartition::hostport()
     return ep;
 }
 
+SrsKafkaMessageOnClient::SrsKafkaMessageOnClient(SrsKafkaProducer* p, SrsListenerType t, string i)
+{
+    producer = p;
+    type = t;
+    ip = i;
+}
+
+SrsKafkaMessageOnClient::~SrsKafkaMessageOnClient()
+{
+}
+
+int SrsKafkaMessageOnClient::call()
+{
+    SrsJsonObject* obj = SrsJsonAny::object();
+    
+    obj->set("msg", SrsJsonAny::str("accept"));
+    obj->set("type", SrsJsonAny::integer(type));
+    obj->set("ip", SrsJsonAny::str(ip.c_str()));
+    
+    return producer->send(obj);
+}
+
+string SrsKafkaMessageOnClient::to_string()
+{
+    return ip;
+}
+
 SrsKafkaProducer::SrsKafkaProducer()
 {
     metadata_ok = false;
@@ -211,6 +240,41 @@ void SrsKafkaProducer::stop()
     worker->stop();
 }
 
+int SrsKafkaProducer::on_client(SrsListenerType type, st_netfd_t stfd)
+{
+    return worker->execute(new SrsKafkaMessageOnClient(this, type, srs_get_peer_ip(st_netfd_fileno(stfd))));
+}
+
+int SrsKafkaProducer::send(SrsJsonObject* obj)
+{
+    int ret = ERROR_SUCCESS;
+    
+    // cache the json object.
+    objects.push_back(obj);
+    
+    // too few messages, ignore.
+    if (objects.size() < SRS_KAFKA_PRODUCER_AGGREGATE_SIZE) {
+        return ret;
+    }
+    
+    // too many messages, warn user.
+    if (objects.size() > SRS_KAFKA_PRODUCER_AGGREGATE_SIZE * 10) {
+        srs_warn("kafka cache too many messages: %d", objects.size());
+    }
+    
+    // sync with backgound metadata worker.
+    st_mutex_lock(lock);
+    
+    // flush message when metadata is ok.
+    if (metadata_ok) {
+        ret = flush();
+    }
+    
+    st_mutex_unlock(lock);
+    
+    return ret;
+}
+
 int SrsKafkaProducer::cycle()
 {
     int ret = ERROR_SUCCESS;
@@ -329,5 +393,12 @@ void SrsKafkaProducer::refresh_metadata()
     srs_trace("kafka async refresh metadata in background");
 }
 
+int SrsKafkaProducer::flush()
+{
+    int ret = ERROR_SUCCESS;
+    // TODO: FIXME: implements it.
+    return ret;
+}
+
 #endif
 
diff --git a/trunk/src/app/srs_app_kafka.hpp b/trunk/src/app/srs_app_kafka.hpp
index f7edaa47f..f4ba4231d 100644
--- a/trunk/src/app/srs_app_kafka.hpp
+++ b/trunk/src/app/srs_app_kafka.hpp
@@ -35,8 +35,12 @@ class SrsLbRoundRobin;
 class SrsAsyncCallWorker;
 class SrsTcpClient;
 class SrsKafkaClient;
+class SrsJsonObject;
+class SrsKafkaProducer;
 
 #include <srs_app_thread.hpp>
+#include <srs_app_server.hpp>
+#include <srs_app_async_call.hpp>
 
 #ifdef SRS_AUTO_KAFKA
 
@@ -60,6 +64,24 @@ public:
     virtual std::string hostport();
 };
 
+/**
+ * the following is all types of kafka messages.
+ */
+struct SrsKafkaMessageOnClient : public ISrsAsyncCallTask
+{
+public:
+    SrsKafkaProducer* producer;
+    SrsListenerType type;
+    std::string ip;
+public:
+    SrsKafkaMessageOnClient(SrsKafkaProducer* p, SrsListenerType t, std::string i);
+    virtual ~SrsKafkaMessageOnClient();
+// interface ISrsAsyncCallTask
+public:
+    virtual int call();
+    virtual std::string to_string();
+};
+
 /**
  * the kafka producer used to save log to kafka cluster.
  */
@@ -73,6 +95,7 @@ private:
     st_cond_t metadata_expired;
 public:
     std::vector<SrsKafkaPartition*> partitions;
+    std::vector<SrsJsonObject*> objects;
 private:
     SrsLbRoundRobin* lb;
     SrsAsyncCallWorker* worker;
@@ -85,6 +108,17 @@ public:
     virtual int initialize();
     virtual int start();
     virtual void stop();
+public:
+    /**
+     * when got any client connect to SRS, notify kafka.
+     */
+    virtual int on_client(SrsListenerType type, st_netfd_t stfd);
+    /**
+     * send json object to kafka cluster.
+     * the producer will aggregate message and send in kafka message set.
+     * @param obj the json object; user must never free it again.
+     */
+    virtual int send(SrsJsonObject* obj);
 // interface ISrsReusableThreadHandler
 public:
     virtual int cycle();
@@ -95,6 +129,7 @@ private:
     virtual int request_metadata();
     // set the metadata to invalid and refresh it.
     virtual void refresh_metadata();
+    virtual int flush();
 };
 
 #endif
diff --git a/trunk/src/app/srs_app_server.cpp b/trunk/src/app/srs_app_server.cpp
index 89d568c20..6fc8aec49 100755
--- a/trunk/src/app/srs_app_server.cpp
+++ b/trunk/src/app/srs_app_server.cpp
@@ -1289,6 +1289,14 @@ int SrsServer::accept_client(SrsListenerType type, st_netfd_t client_stfd)
     }
     srs_assert(conn);
     
+#ifdef SRS_AUTO_KAFKA
+    // notify kafka cluster.
+    if ((ret = kafka->on_client(type, client_stfd)) != ERROR_SUCCESS) {
+        srs_error("kafka handler on_client failed. ret=%d", ret);
+        return ret;
+    }
+#endif
+    
     // directly enqueue, the cycle thread will remove the client.
     conns.push_back(conn);
     srs_verbose("add conn to vector.");