add producer api messages.

@@ -102,7 +102,7 @@ std::string srs_kafka_summary_partitions(const vector<SrsKafkaPartition*>& parti
     return srs_join_vector_string(ret, ", ");
 }
 
-void srs_kafka_metadata2connector(SrsKafkaTopicMetadataResponse* metadata, vector<SrsKafkaPartition*>& partitions)
+void srs_kafka_metadata2connector(string topic_name, SrsKafkaTopicMetadataResponse* metadata, vector<SrsKafkaPartition*>& partitions)
 {
     for (int i = 0; i < metadata->metadatas.size(); i++) {
         SrsKafkaTopicMetadata* topic = metadata->metadatas.at(i);
@@ -111,6 +111,8 @@ void srs_kafka_metadata2connector(SrsKafkaTopicMetadataResponse* metadata, vecto
             SrsKafkaPartitionMetadata* partition = topic->metadatas.at(j);
             
             SrsKafkaPartition* p = new SrsKafkaPartition();
+            
+            p->topic = topic_name;
             p->id = partition->partition_id;
             p->broker = partition->leader;
             
@@ -171,6 +173,11 @@ int SrsKafkaPartition::connect()
     return ret;
 }
 
+int SrsKafkaPartition::flush(SrsKafkaPartitionCache* pc)
+{
+    return kafka->write_messages(topic, id, *pc);
+}
+
 SrsKafkaMessage::SrsKafkaMessage(int k)
 {
     key = k;
@@ -290,11 +297,15 @@ int SrsKafkaCache::flush(SrsKafkaPartition* partition, int key, SrsKafkaPartitio
     
     // connect transport.
     if ((ret = partition->connect()) != ERROR_SUCCESS) {
-        srs_error("connect to partition failed. ret=%d", ret);
+        srs_error("kafka connect to partition failed. ret=%d", ret);
         return ret;
     }
     
-    // TODO: FIXME: implements it.
+    // write the json objects.
+    if ((ret = partition->flush(pc)) != ERROR_SUCCESS) {
+        srs_error("kafka write messages failed. ret=%d", ret);
+        return ret;
+    }
     
     // free all wrote messages.
     for (vector<SrsJsonObject*>::iterator it = pc->begin(); it != pc->end(); ++it) {
@@ -546,7 +557,7 @@ int SrsKafkaProducer::request_metadata()
     srs_trace("kafka metadata: %s", summary.c_str());
     
     // generate the partition info.
-    srs_kafka_metadata2connector(metadata, partitions);
+    srs_kafka_metadata2connector(topic, metadata, partitions);
     srs_trace("kafka connector: %s", srs_kafka_summary_partitions(partitions).c_str());
     
     // update the total partition for cache.

@@ -46,6 +46,11 @@ class SrsKafkaProducer;
 #ifdef SRS_AUTO_KAFKA
 
 /**
+ * the partition messages cache.
+ */
+typedef std::vector<SrsJsonObject*> SrsKafkaPartitionCache;
+
+/**
  * the kafka partition info.
  */
 struct SrsKafkaPartition
@@ -56,6 +61,7 @@ private:
     SrsKafkaClient* kafka;
 public:
     int id;
+    std::string topic;
     // leader.
     int broker;
     std::string host;
@@ -66,6 +72,7 @@ public:
 public:
     virtual std::string hostport();
     virtual int connect();
+    virtual int flush(SrsKafkaPartitionCache* pc);
 };
 
 /**
@@ -95,11 +102,6 @@ public:
 };
 
 /**
- * the partition messages cache.
- */
-typedef std::vector<SrsJsonObject*> SrsKafkaPartitionCache;
-
-/**
  * a message cache for kafka.
  */
 class SrsKafkaCache

@@ -274,6 +274,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define ERROR_KAFKA_CODEC_RESPONSE          4033
 #define ERROR_KAFKA_CODEC_ARRAY             4034
 #define ERROR_KAFKA_CODEC_METADATA          4035
+#define ERROR_KAFKA_CODEC_MESSAGE           4036
+#define ERROR_KAFKA_CODEC_PRODUCER          4037
 
 ///////////////////////////////////////////////////////
 // HTTP API error.

@@ -33,6 +33,7 @@ using namespace std;
 #include <srs_protocol_stream.hpp>
 #include <srs_kernel_utility.hpp>
 #include <srs_protocol_utility.hpp>
+#include <srs_protocol_json.hpp>
 
 #ifdef SRS_AUTO_KAFKA
 
@@ -478,6 +479,67 @@ SrsKafkaRawMessage::~SrsKafkaRawMessage()
     srs_freep(value);
 }
 
+int SrsKafkaRawMessage::nb_bytes()
+{
+    return 8 + 4 + 4 + 1 + 1 + key->nb_bytes() + value->nb_bytes();
+}
+
+int SrsKafkaRawMessage::encode(SrsBuffer* buf)
+{
+    int ret = ERROR_SUCCESS;
+    
+    if (!buf->require(8 + 4 + 4 + 1 + 1)) {
+        ret = ERROR_KAFKA_CODEC_MESSAGE;
+        srs_error("kafka encode message failed. ret=%d", ret);
+        return ret;
+    }
+    buf->write_8bytes(offset);
+    buf->write_4bytes(message_size);
+    buf->write_4bytes(crc);
+    buf->write_1bytes(magic_byte);
+    buf->write_1bytes(attributes);
+    
+    if ((ret = key->encode(buf)) != ERROR_SUCCESS) {
+        srs_error("kafka encode message key failed. ret=%d", ret);
+        return ret;
+    }
+    
+    if ((ret = value->encode(buf)) != ERROR_SUCCESS) {
+        srs_error("kafka encode message value failed. ret=%d", ret);
+        return ret;
+    }
+    
+    return ret;
+}
+
+int SrsKafkaRawMessage::decode(SrsBuffer* buf)
+{
+    int ret = ERROR_SUCCESS;
+    
+    if (!buf->require(8 + 4 + 4 + 1 + 1)) {
+        ret = ERROR_KAFKA_CODEC_MESSAGE;
+        srs_error("kafka decode message failed. ret=%d", ret);
+        return ret;
+    }
+    offset = buf->read_8bytes();
+    message_size = buf->read_4bytes();
+    crc = buf->read_4bytes();
+    magic_byte = buf->read_1bytes();
+    attributes = buf->read_1bytes();
+    
+    if ((ret = key->decode(buf)) != ERROR_SUCCESS) {
+        srs_error("kafka decode message key failed. ret=%d", ret);
+        return ret;
+    }
+    
+    if ((ret = value->decode(buf)) != ERROR_SUCCESS) {
+        srs_error("kafka decode message value failed. ret=%d", ret);
+        return ret;
+    }
+    
+    return ret;
+}
+
 SrsKafkaRawMessageSet::SrsKafkaRawMessageSet()
 {
 }
@@ -492,6 +554,59 @@ SrsKafkaRawMessageSet::~SrsKafkaRawMessageSet()
     messages.clear();
 }
 
+void SrsKafkaRawMessageSet::append(SrsKafkaRawMessage* msg)
+{
+    messages.push_back(msg);
+}
+
+int SrsKafkaRawMessageSet::nb_bytes()
+{
+    int s = 0;
+    
+    vector<SrsKafkaRawMessage*>::iterator it;
+    for (it = messages.begin(); it != messages.end(); ++it) {
+        SrsKafkaRawMessage* message = *it;
+        s += message->nb_bytes();
+    }
+    
+    return s;
+}
+
+int SrsKafkaRawMessageSet::encode(SrsBuffer* buf)
+{
+    int ret = ERROR_SUCCESS;
+    
+    vector<SrsKafkaRawMessage*>::iterator it;
+    for (it = messages.begin(); it != messages.end(); ++it) {
+        SrsKafkaRawMessage* message = *it;
+        if ((ret = message->encode(buf)) != ERROR_SUCCESS) {
+            srs_error("kafka encode message set failed. ret=%d", ret);
+            return ret;
+        }
+    }
+    
+    return ret;
+}
+
+int SrsKafkaRawMessageSet::decode(SrsBuffer* buf)
+{
+    int ret = ERROR_SUCCESS;
+    
+    while (!buf->empty()) {
+        SrsKafkaRawMessage* message = new SrsKafkaRawMessage();
+        
+        if ((ret = message->decode(buf)) != ERROR_SUCCESS) {
+            srs_freep(message);
+            srs_error("kafka decode message set elem failed. ret=%d", ret);
+            return ret;
+        }
+        
+        messages.push_back(message);
+    }
+    
+    return ret;
+}
+
 SrsKafkaRequest::SrsKafkaRequest()
 {
     header.set_correlation_id(SrsKafkaCorrelationPool::instance()->generate_correlation_id());
@@ -863,6 +978,155 @@ int SrsKafkaTopicMetadataResponse::decode(SrsBuffer* buf)
     return ret;
 }
 
+int SrsKafkaProducerPartitionMessages::nb_bytes()
+{
+    return 4 + 4 + messages.nb_bytes();
+}
+
+int SrsKafkaProducerPartitionMessages::encode(SrsBuffer* buf)
+{
+    int ret = ERROR_SUCCESS;
+    
+    if (!buf->require(4 + 4)) {
+        ret = ERROR_KAFKA_CODEC_PRODUCER;
+        srs_error("kafka encode producer failed. ret=%d", ret);
+        return ret;
+    }
+    buf->write_4bytes(partition);
+    buf->write_4bytes(message_set_size);
+    
+    if ((ret = messages.encode(buf)) != ERROR_SUCCESS) {
+        srs_error("kafka encode producer messages failed. ret=%d", ret);
+        return ret;
+    }
+    
+    return ret;
+}
+
+int SrsKafkaProducerPartitionMessages::decode(SrsBuffer* buf)
+{
+    int ret = ERROR_SUCCESS;
+    
+    if (!buf->require(4 + 4)) {
+        ret = ERROR_KAFKA_CODEC_PRODUCER;
+        srs_error("kafka decode producer failed. ret=%d", ret);
+        return ret;
+    }
+    partition = buf->read_4bytes();
+    message_set_size = buf->read_4bytes();
+    
+    // for the message set decode util empty, we must create a new buffer when
+    // there exists other objects after message set.
+    if (buf->size() - buf->pos() != message_set_size) {
+        SrsBuffer* tbuf = new SrsBuffer();
+        SrsAutoFree(SrsBuffer, tbuf);
+        
+        if ((ret = tbuf->initialize(buf->data() + buf->pos(), message_set_size)) != ERROR_SUCCESS) {
+            return ret;
+        }
+        
+        if ((ret = messages.decode(tbuf)) != ERROR_SUCCESS) {
+            srs_error("kafka decode procuder messages failed. ret=%d", ret);
+            return ret;
+        }
+    } else {
+        if ((ret = messages.decode(buf)) != ERROR_SUCCESS) {
+            srs_error("kafka decode procuder messages failed. ret=%d", ret);
+            return ret;
+        }
+    }
+    
+    return ret;
+}
+
+int SrsKafkaProducerTopicMessages::nb_bytes()
+{
+    return topic_name.nb_bytes() + partitions.nb_bytes();
+}
+
+int SrsKafkaProducerTopicMessages::encode(SrsBuffer* buf)
+{
+    int ret = ERROR_SUCCESS;
+    
+    if ((ret = topic_name.encode(buf)) != ERROR_SUCCESS) {
+        return ret;
+    }
+    
+    if ((ret = partitions.encode(buf)) != ERROR_SUCCESS) {
+        return ret;
+    }
+    
+    return ret;
+}
+
+int SrsKafkaProducerTopicMessages::decode(SrsBuffer* buf)
+{
+    int ret = ERROR_SUCCESS;
+    
+    if ((ret = topic_name.decode(buf)) != ERROR_SUCCESS) {
+        return ret;
+    }
+    
+    if ((ret = partitions.decode(buf)) != ERROR_SUCCESS) {
+        return ret;
+    }
+    
+    return ret;
+}
+
+SrsKafkaProducerRequest::SrsKafkaProducerRequest()
+{
+    required_acks = 0;
+    timeout = 0;
+}
+
+SrsKafkaProducerRequest::~SrsKafkaProducerRequest()
+{
+}
+
+int SrsKafkaProducerRequest::nb_bytes()
+{
+    return 2 + 4 + topics.nb_bytes();
+}
+
+int SrsKafkaProducerRequest::encode(SrsBuffer* buf)
+{
+    int ret = ERROR_SUCCESS;
+    
+    if (!buf->require(2 + 4)) {
+        ret = ERROR_KAFKA_CODEC_PRODUCER;
+        srs_error("kafka encode producer failed. ret=%d", ret);
+        return ret;
+    }
+    buf->write_2bytes(required_acks);
+    buf->write_4bytes(timeout);
+    
+    if ((ret = topics.encode(buf)) != ERROR_SUCCESS) {
+        srs_error("kafka encode producer topics failed. ret=%d", ret);
+    }
+    
+    return ret;
+}
+
+int SrsKafkaProducerRequest::decode(SrsBuffer* buf)
+{
+    int ret = ERROR_SUCCESS;
+    
+    if (!buf->require(2 + 4)) {
+        ret = ERROR_KAFKA_CODEC_PRODUCER;
+        srs_error("kafka decode producer failed. ret=%d", ret);
+        return ret;
+    }
+    required_acks = buf->read_2bytes();
+    timeout = buf->read_4bytes();
+    
+    if ((ret = topics.decode(buf)) != ERROR_SUCCESS) {
+        srs_error("kafka decode producer topics failed. ret=%d", ret);
+    }
+    
+    return ret;
+}
+
 SrsKafkaCorrelationPool* SrsKafkaCorrelationPool::_instance = new SrsKafkaCorrelationPool();
 
 SrsKafkaCorrelationPool* SrsKafkaCorrelationPool::instance()
@@ -1085,6 +1349,13 @@ int SrsKafkaClient::fetch_metadata(string topic, SrsKafkaTopicMetadataResponse**
     return ret;
 }
 
+int SrsKafkaClient::write_messages(std::string topic, int32_t partition, vector<SrsJsonObject*>& msgs)
+{
+    int ret = ERROR_SUCCESS;
+    // TODO: FIXME: implements it.
+    return ret;
+}
+
 vector<string> srs_kafka_array2vector(SrsKafkaArray<SrsKafkaString>* arr)
 {
     vector<string> strs;

@@ -39,6 +39,7 @@
 
 class SrsFastStream;
 class ISrsProtocolReaderWriter;
+class SrsJsonObject;
 
 #ifdef SRS_AUTO_KAFKA
 
@@ -484,7 +485,7 @@ public:
  * the kafka message in message set.
  * @see https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol#AGuideToTheKafkaProtocol-Messagesets
  */
-struct SrsKafkaRawMessage
+struct SrsKafkaRawMessage : public ISrsCodec
 {
 // metadata.
 public:
@@ -530,19 +531,32 @@ public:
 public:
     SrsKafkaRawMessage();
     virtual ~SrsKafkaRawMessage();
+// interface ISrsCodec
+public:
+    virtual int nb_bytes();
+    virtual int encode(SrsBuffer* buf);
+    virtual int decode(SrsBuffer* buf);
 };
 
 /**
  * a set of kafka message.
  * @see https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol#AGuideToTheKafkaProtocol-Messagesets
+ * @remark because the message set are not preceded by int32, so we decode the buffer util empty.
  */
-class SrsKafkaRawMessageSet
+class SrsKafkaRawMessageSet : public ISrsCodec
 {
 private:
     std::vector<SrsKafkaRawMessage*> messages;
 public:
     SrsKafkaRawMessageSet();
     virtual ~SrsKafkaRawMessageSet();
+public:
+    virtual void append(SrsKafkaRawMessage* msg);
+// interface ISrsCodec
+public:
+    virtual int nb_bytes();
+    virtual int encode(SrsBuffer* buf);
+    virtual int decode(SrsBuffer* buf);
 };
 
 /**
@@ -704,6 +718,94 @@ public:
     virtual int decode(SrsBuffer* buf);
 };
 
+
+/**
+ * the messages for producer to send.
+ * @see https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol#AGuideToTheKafkaProtocol-ProduceRequest
+ */
+struct SrsKafkaProducerPartitionMessages : public ISrsCodec
+{
+public:
+    /**
+     * The partition that data is being published to.
+     */
+    int32_t partition;
+    /**
+     * The size, in bytes, of the message set that follows.
+     */
+    int32_t message_set_size;
+    /**
+     * messages in set.
+     */
+    SrsKafkaRawMessageSet messages;
+// interface ISrsCodec
+public:
+    virtual int nb_bytes();
+    virtual int encode(SrsBuffer* buf);
+    virtual int decode(SrsBuffer* buf);
+};
+struct SrsKafkaProducerTopicMessages : public ISrsCodec
+{
+public:
+    /**
+     * The topic that data is being published to.
+     */
+    SrsKafkaString topic_name;
+    /**
+     * messages of partitions.
+     */
+    SrsKafkaArray<SrsKafkaProducerPartitionMessages> partitions;
+// interface ISrsCodec
+public:
+    virtual int nb_bytes();
+    virtual int encode(SrsBuffer* buf);
+    virtual int decode(SrsBuffer* buf);
+};
+
+/**
+ * the request for producer to send message.
+ * @see https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol#AGuideToTheKafkaProtocol-ProduceRequest
+ */
+class SrsKafkaProducerRequest : public SrsKafkaRequest
+{
+private:
+    /**
+     * This field indicates how many acknowledgements the servers should receive 
+     * before responding to the request. If it is 0 the server will not send any 
+     * response (this is the only case where the server will not reply to a request). 
+     * If it is 1, the server will wait the data is written to the local log 
+     * before sending a response. If it is -1 the server will block until the 
+     * message is committed by all in sync replicas before sending a response. 
+     * For any number > 1 the server will block waiting for this number of 
+     * acknowledgements to occur (but the server will never wait for more 
+     * acknowledgements than there are in-sync replicas).
+     */
+    int16_t required_acks;
+    /**
+     * This provides a maximum time in milliseconds the server can await the receipt 
+     * of the number of acknowledgements in RequiredAcks. The timeout is not an exact 
+     * limit on the request time for a few reasons: (1) it does not include network 
+     * latency, (2) the timer begins at the beginning of the processing of this request 
+     * so if many requests are queued due to server overload that wait time will not 
+     * be included, (3) we will not terminate a local write so if the local write 
+     * time exceeds this timeout it will not be respected. To get a hard timeout of 
+     * this type the client should use the socket timeout.
+     */
+    int32_t timeout;
+    /**
+     * messages of topics.
+     */
+    SrsKafkaArray<SrsKafkaProducerTopicMessages> topics;
+public:
+    SrsKafkaProducerRequest();
+    virtual ~SrsKafkaProducerRequest();
+// interface ISrsCodec
+public:
+    virtual int nb_bytes();
+    virtual int encode(SrsBuffer* buf);
+    virtual int decode(SrsBuffer* buf);
+};
+
 /**
  * the poll to discovery reponse.
  * @param CorrelationId This is a user-supplied integer. It will be passed back 
@@ -813,6 +915,10 @@ public:
      * fetch the metadata from broker for topic.
      */
     virtual int fetch_metadata(std::string topic, SrsKafkaTopicMetadataResponse** pmsg);
+    /**
+     * write the messages to partition of topic.
+     */
+    virtual int write_messages(std::string topic, int32_t partition, std::vector<SrsJsonObject*>& msgs);
 };
 
 // convert kafka array[string] to vector[string]