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source/third_party/rocketmq-client-cpp-2.2.0-source-release/example/PullConsumeMessage.c

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+/*
+ * 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 <stdio.h>
+#include "CCommon.h"
+#include "CMessageExt.h"
+#include "CMessageQueue.h"
+#include "CPullConsumer.h"
+#include "CPullResult.h"
+#ifdef _WIN32
+#include <windows.h>
+#else
+#include <memory.h>
+#include <unistd.h>
+#endif
+
+void thread_sleep(unsigned milliseconds) {
+#ifdef _WIN32
+  Sleep(milliseconds);
+#else
+  usleep(milliseconds * 1000);  // takes microseconds
+#endif
+}
+
+int main(int argc, char* argv[]) {
+  int i = 0, j = 0;
+  int ret = 0;
+  int size = 0;
+  CMessageQueue* mqs = NULL;
+  printf("PullConsumer Initializing....\n");
+  CPullConsumer* consumer = CreatePullConsumer("Group_Consumer_Test");
+  SetPullConsumerNameServerAddress(consumer, "172.17.0.2:9876");
+  StartPullConsumer(consumer);
+  printf("Pull Consumer Start...\n");
+  for (i = 1; i <= 5; i++) {
+    printf("FetchSubscriptionMessageQueues : %d times\n", i);
+    ret = FetchSubscriptionMessageQueues(consumer, "T_TestTopic", &mqs, &size);
+    if (ret != OK) {
+      printf("Get MQ Queue Failed,ErrorCode:%d\n", ret);
+    }
+    printf("Get MQ Size:%d\n", size);
+    for (j = 0; j < size; j++) {
+      int noNewMsg = 0;
+      long long tmpoffset = 0;
+      printf("Pull Message For Topic:%s,Queue:%s,QueueId:%d\n", mqs[j].topic, mqs[j].brokerName, mqs[j].queueId);
+      do {
+        int k = 0;
+        CPullResult pullResult = Pull(consumer, &mqs[j], "*", tmpoffset, 32);
+        if (pullResult.pullStatus != E_BROKER_TIMEOUT) {
+          tmpoffset = pullResult.nextBeginOffset;
+        }
+        printf("PullStatus:%d,MaxOffset:%lld,MinOffset:%lld,NextBegainOffset:%lld", pullResult.pullStatus,
+               pullResult.maxOffset, pullResult.minOffset, pullResult.nextBeginOffset);
+        switch (pullResult.pullStatus) {
+          case E_FOUND:
+            printf("Get Message Size:%d\n", pullResult.size);
+            for (k = 0; k < pullResult.size; ++k) {
+              printf("Got Message ID:%s,Body:%s\n", GetMessageId(pullResult.msgFoundList[k]),
+                     GetMessageBody(pullResult.msgFoundList[k]));
+            }
+            break;
+          case E_NO_MATCHED_MSG:
+            noNewMsg = 1;
+            break;
+          default:
+            noNewMsg = 0;
+        }
+        ReleasePullResult(pullResult);
+        thread_sleep(100);
+      } while (noNewMsg == 0);
+      thread_sleep(1000);
+    }
+    thread_sleep(2000);
+    ReleaseSubscriptionMessageQueue(mqs);
+  }
+  thread_sleep(5000);
+  ShutdownPullConsumer(consumer);
+  DestroyPullConsumer(consumer);
+  printf("PullConsumer Shutdown!\n");
+  return 0;
+}