[GitHub] [pulsar] equanz commented on a diff in pull request #17452: [feat][cpp] Add async receive function to C API

[GitBox <gi...@apache.org>]

equanz commented on code in PR #17452:
URL: https://github.com/apache/pulsar/pull/17452#discussion_r964356319


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pulsar-client-cpp/tests/c/c_BasicEndToEndTest.cc:
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@@ -0,0 +1,102 @@
+/**
+ * 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 <gtest/gtest.h>
+#include <pulsar/c/client.h>
+#include <pulsar/c/producer.h>
+#include <pulsar/c/consumer.h>
+#include <pulsar/c/client_configuration.h>
+#include <pulsar/c/consumer_configuration.h>
+#include <pulsar/c/message.h>
+#include <pulsar/c/message_id.h>
+#include <pulsar/c/result.h>
+
+#include "../lib/Future.h"
+
+TEST(c_BasicEndToEndTest, testAsyncProduceConsume) {
+    const char *lookup_url = "pulsar://localhost:6650";
+    const char *topic_name = "persistent://public/default/test-c-produce-consume";
+    const char *sub_name = "my-sub-name";
+
+    pulsar_client_configuration_t *conf = pulsar_client_configuration_create();
+    pulsar_client_t *client = pulsar_client_create(lookup_url, conf);
+
+    pulsar_producer_configuration_t *producer_conf = pulsar_producer_configuration_create();
+    pulsar_producer_t *producer;
+    pulsar_result result = pulsar_client_create_producer(client, topic_name, producer_conf, &producer);
+    ASSERT_EQ(pulsar_result_Ok, result);
+
+    pulsar_consumer_configuration_t *consumer_conf = pulsar_consumer_configuration_create();
+    pulsar_consumer_t *consumer;
+    result = pulsar_client_subscribe(client, topic_name, sub_name, consumer_conf, &consumer);
+    ASSERT_EQ(pulsar_result_Ok, result);
+
+    ASSERT_STREQ(topic_name, pulsar_producer_get_topic(producer));
+    ASSERT_STREQ(topic_name, pulsar_consumer_get_topic(consumer));
+    ASSERT_STREQ(sub_name, pulsar_consumer_get_subscription_name(consumer));
+
+    // send asynchronously
+    pulsar::Promise<pulsar_result, pulsar_message_id_t *> send_promise;
+    const char *content = "msg-1-content";
+    pulsar_message_t *msg = pulsar_message_create();
+    pulsar_message_set_content(msg, content, strlen(content));
+    ASSERT_STREQ("(-1,-1,-1,-1)", pulsar_message_id_str(pulsar_message_get_message_id(msg)));
+    pulsar_producer_send_async(
+        producer, msg,
+        [](pulsar_result async_result, pulsar_message_id_t *msg_id, void *ctx) {
+            auto ctx_promise = static_cast<pulsar::Promise<pulsar_result, pulsar_message_id_t *> *>(ctx);
+            ASSERT_EQ(pulsar_result_Ok, async_result);
+            ctx_promise->setValue(msg_id);
+        },
+        &send_promise);
+
+    pulsar_message_id_t *msg_id;
+    send_promise.getFuture().get(msg_id);
+    ASSERT_STRNE("(-1,-1,-1,-1)", pulsar_message_id_str(msg_id));
+    pulsar_message_id_free(msg_id);
+    pulsar_message_free(msg);
+
+    pulsar::Promise<pulsar_result, pulsar_message_t *> receive_promise;
+    // receive asynchronously
+    pulsar_consumer_receive_async(
+        consumer,
+        [](pulsar_result async_result, pulsar_message_t *received_msg, void *ctx) {
+            auto ctx_promise = static_cast<pulsar::Promise<pulsar_result, pulsar_message_t *> *>(ctx);
+            ASSERT_EQ(pulsar_result_Ok, async_result);
+            ctx_promise->setValue(received_msg);
+        },
+        &receive_promise);
+
+    pulsar_message_t *received_msg;
+    receive_promise.getFuture().get(received_msg);
+    ASSERT_STREQ(content, static_cast<const char *>(pulsar_message_get_data(received_msg)));
+    pulsar_message_free(received_msg);

Review Comment:
   I'll modify it.
   
   However, I also use `pulsar::Promise` to wait for the callback completion in the test thread.
   To achieve this process, I'll use `std::future` instead of conditional wait, etc.



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