Add Method:#syncSend(java.lang.String, java.util.Collection<T>)
Fix the bug of BatchMessage syncSend without timeout
diff --git a/rocketmq-spring-boot/src/main/java/org/apache/rocketmq/spring/core/RocketMQTemplate.java b/rocketmq-spring-boot/src/main/java/org/apache/rocketmq/spring/core/RocketMQTemplate.java
index 089016a..626b16f 100644
--- a/rocketmq-spring-boot/src/main/java/org/apache/rocketmq/spring/core/RocketMQTemplate.java
+++ b/rocketmq-spring-boot/src/main/java/org/apache/rocketmq/spring/core/RocketMQTemplate.java
@@ -467,6 +467,42 @@
     }
 
     /**
+     * syncSend batch messages
+     *
+     * @param destination formats: `topicName:tags`
+     * @param messages Collection of {@link org.springframework.messaging.Message}
+     * @return {@link SendResult}
+     */
+    public <T extends Message> SendResult syncSend(String destination, Collection<T> messages) {
+        if (Objects.isNull(messages) || messages.size() == 0) {
+            log.error("syncSend with batch failed. destination:{}, messages is empty ", destination);
+            throw new IllegalArgumentException("`messages` can not be empty");
+        }
+
+        try {
+            long now = System.currentTimeMillis();
+            Collection<org.apache.rocketmq.common.message.Message> rmqMsgs = new ArrayList<>();
+            for (Message msg : messages) {
+                if (Objects.isNull(msg) || Objects.isNull(msg.getPayload())) {
+                    log.warn("Found a message empty in the batch, skip it");
+                    continue;
+                }
+                rmqMsgs.add(this.createRocketMqMessage(destination, msg));
+            }
+
+            SendResult sendResult = producer.send(rmqMsgs);
+            long costTime = System.currentTimeMillis() - now;
+            if (log.isDebugEnabled()) {
+                log.debug("send messages cost: {} ms, msgId:{}", costTime, sendResult.getMsgId());
+            }
+            return sendResult;
+        } catch (Exception e) {
+            log.error("syncSend with batch failed. destination:{}, messages.size:{} ", destination, messages.size());
+            throw new MessagingException(e.getMessage(), e);
+        }
+    }
+
+    /**
      * syncSend batch messages in a given timeout.
      *
      * @param destination formats: `topicName:tags`