feat: support producer access mode.

Author: shibd

pulsar/__init__.py

@@ -48,7 +48,7 @@
 import _pulsar
 
 from _pulsar import Result, CompressionType, ConsumerType, InitialPosition, PartitionsRoutingMode, BatchingType, \
-    LoggerLevel, BatchReceivePolicy, KeySharedPolicy, KeySharedMode  # noqa: F401
+    LoggerLevel, BatchReceivePolicy, KeySharedPolicy, KeySharedMode, ProducerAccessMode  # noqa: F401
 
 from pulsar.__about__ import __version__
 
@@ -523,7 +523,8 @@ def create_producer(self, topic,
                         properties=None,
                         batching_type=BatchingType.Default,
                         encryption_key=None,
-                        crypto_key_reader=None
+                        crypto_key_reader=None,
+                        access_mode=ProducerAccessMode.Shared,
                         ):
         """
         Create a new producer on a given topic.
@@ -614,6 +615,15 @@ def create_producer(self, topic,
         crypto_key_reader: CryptoKeyReader, optional
             Symmetric encryption class implementation, configuring public key encryption messages for the producer
             and private key decryption messages for the consumer
+        access_mode: ProducerAccessMode, default=ProducerAccessMode.Shared
+            Set the type of access mode that the producer requires on the topic.
+            Supported modes:
+            * Shared: By default multiple producers can publish on a topic.
+            * Exclusive: Require exclusive access for producer.
+                         Fail immediately if there's already a producer connected.
+            * WaitForExclusive: Producer creation is pending until it can acquire exclusive access.
+            * ExclusiveWithFencing: Acquire exclusive access for the producer.
+                                    Any existing producer will be removed and invalidated immediately.
         """
         _check_type(str, topic, 'topic')
         _check_type_or_none(str, producer_name, 'producer_name')
@@ -649,6 +659,7 @@ def create_producer(self, topic,
         conf.batching_type(batching_type)
         conf.chunking_enabled(chunking_enabled)
         conf.lazy_start_partitioned_producers(lazy_start_partitioned_producers)
+        conf.access_mode(access_mode)
         if producer_name:
             conf.producer_name(producer_name)
         if initial_sequence_id:

src/config.cc

@@ -223,7 +223,9 @@ void export_config(py::module_& m) {
         .def("batching_type", &ProducerConfiguration::setBatchingType, return_value_policy::reference)
         .def("batching_type", &ProducerConfiguration::getBatchingType)
         .def("encryption_key", &ProducerConfiguration::addEncryptionKey, return_value_policy::reference)
-        .def("crypto_key_reader", &ProducerConfiguration::setCryptoKeyReader, return_value_policy::reference);
+        .def("crypto_key_reader", &ProducerConfiguration::setCryptoKeyReader, return_value_policy::reference)
+        .def("access_mode", &ProducerConfiguration::setAccessMode, return_value_policy::reference)
+        .def("access_mode", &ProducerConfiguration::getAccessMode, return_value_policy::copy);
 
     class_<BatchReceivePolicy>(m, "BatchReceivePolicy")
         .def(init<int, int, long>())

src/enums.cc

@@ -124,6 +124,12 @@ void export_enums(py::module_& m) {
         .value("Default", ProducerConfiguration::DefaultBatching)
         .value("KeyBased", ProducerConfiguration::KeyBasedBatching);
 
+    enum_<ProducerConfiguration::ProducerAccessMode>(m, "ProducerAccessMode", "Producer Access Mode")
+        .value("Shared", ProducerConfiguration::ProducerAccessMode::Shared)
+        .value("Exclusive", ProducerConfiguration::ProducerAccessMode::Exclusive)
+        .value("WaitForExclusive", ProducerConfiguration::ProducerAccessMode::WaitForExclusive)
+        .value("ExclusiveWithFencing", ProducerConfiguration::ProducerAccessMode::ExclusiveWithFencing);
+
     enum_<Logger::Level>(m, "LoggerLevel")
         .value("Debug", Logger::LEVEL_DEBUG)
         .value("Info", Logger::LEVEL_INFO)

tests/pulsar_test.py

@@ -42,6 +42,7 @@
     InitialPosition,
     CryptoKeyReader,
     ConsumerBatchReceivePolicy,
+    ProducerAccessMode,
 )
 from pulsar.schema import JsonSchema, Record, Integer
 
@@ -166,6 +167,61 @@ def test_producer_send(self):
         self.assertEqual(msg_id, msg.message_id())
         client.close()
 
+    def test_producer_access_mode_exclusive(self):
+        client = Client(self.serviceUrl)
+        topic_name = "test-access-mode-exclusive"
+        client.create_producer(topic_name, producer_name="p1", access_mode=pulsar.ProducerAccessMode.Exclusive)
+        with self.assertRaises(pulsar.ProducerFenced):
+            client.create_producer(topic_name, producer_name="p2", access_mode=pulsar.ProducerAccessMode.Exclusive)
+        client.close()
+
+    def test_producer_access_mode_wait_exclusive(self):
+        client = Client(self.serviceUrl)
+        topic_name = "test_producer_access_mode_wait_exclusive"
+        producer1 = client.create_producer(
+            topic=topic_name,
+            producer_name='p-1',
+            access_mode=pulsar.ProducerAccessMode.Exclusive
+        )
+        assert producer1.producer_name() == 'p-1'
+
+        # when p1 close, p2 success created.
+        producer1.close()
+        producer2 = client.create_producer(
+            topic=topic_name,
+            producer_name='p-2',
+            access_mode=pulsar.ProducerAccessMode.WaitForExclusive
+        )
+        assert producer2.producer_name() == 'p-2'
+
+        producer2.close()
+        client.close()
+
+    def test_producer_access_mode_exclusive_with_fencing(self):
+        client = Client(self.serviceUrl)
+        topic_name = 'test_producer_access_mode_exclusive_with_fencing'
+
+        producer1 = client.create_producer(
+            topic=topic_name,
+            producer_name='p-1',
+            access_mode=pulsar.ProducerAccessMode.Exclusive
+        )
+        assert producer1.producer_name() == 'p-1'
+
+        producer2 = client.create_producer(
+            topic=topic_name,
+            producer_name='p-2',
+            access_mode=pulsar.ProducerAccessMode.ExclusiveWithFencing
+        )
+        assert producer2.producer_name() == 'p-2'
+
+        # producer1 will be fenced.
+        with self.assertRaises(pulsar.ProducerFenced):
+            producer1.send('test-msg'.encode('utf-8'))
+
+        producer2.close()
+        client.close()
+
     def test_producer_is_connected(self):
         client = Client(self.serviceUrl)
         topic = "test_producer_is_connected"