Merge pull request #14046 from izzyacademy/patch-3

Updating How to Send Event Synchronously

Author: v-shils

articles/event-hubs/event-hubs-java-get-started-send.md

@@ -8,7 +8,7 @@ manager: timlt
 ms.service: event-hubs
 ms.workload: core
 ms.topic: article
-ms.date: 08/20/2018
+ms.date: 08/27/2018
 ms.author: shvija
 
 ---
@@ -32,13 +32,13 @@ The code in this tutorial is based on the [SimpleSend GitHub sample](https://git
 
 ## Send events to Event Hubs
 
-The Java client library for Event Hubs is available for use in Maven projects from the [Maven Central Repository](https://search.maven.org/#search%7Cga%7C1%7Ca%3A%22azure-eventhubs%22). You can reference this library using the following dependency declaration inside your Maven project file. The current version is 1.0.1:    
+The Java client library for Event Hubs is available for use in Maven projects from the [Maven Central Repository](https://search.maven.org/#search%7Cga%7C1%7Ca%3A%22azure-eventhubs%22). You can reference this library using the following dependency declaration inside your Maven project file. The current version is 1.0.2:    
 
 ```xml
 <dependency>
     <groupId>com.microsoft.azure</groupId>
     <artifactId>azure-eventhubs</artifactId>
-    <version>1.0.1</version>
+    <version>1.0.2</version>
 </dependency>
 ```
 
@@ -71,6 +71,10 @@ public class SimpleSend {
 
     public static void main(String[] args)
             throws EventHubException, ExecutionException, InterruptedException, IOException {
+            
+            
+    }
+ }
 ```
 
 ### Construct connection string
@@ -102,6 +106,33 @@ ehClient.closeSync();
 
 ``` 
 
+### How messages are routed to EventHub partitions
+
+Before messages are retrieved by consumers, they have to be published to the partitions first by the publishers. When messages are published to event hub synchronously using the sendSync() method on the com.microsoft.azure.eventhubs.EventHubClient object, the message could be sent to a specific partition or distributed to all available partitions in a round-robin manner depending on whether the partition key is specified or not.
+
+When a string representing the partition key is specified, the key will be hashed to determine which partition to send the event to.
+
+When the partition key is not set, then messages will round-robined to all available partitions
+
+```java
+// Serialize the event into bytes
+byte[] payloadBytes = gson.toJson(messagePayload).getBytes(Charset.defaultCharset());
+
+// Use the bytes to construct an {@link EventData} object
+EventData sendEvent = EventData.create(payloadBytes);
+
+// Transmits the event to event hub without a partition key
+// If a partition key is not set, then we will round-robin to all topic partitions
+eventHubClient.sendSync(sendEvent);
+
+//  the partitionKey will be hash'ed to determine the partitionId to send the eventData to.
+eventHubClient.sendSync(sendEvent, partitionKey);
+
+// close the client at the end of your program
+eventHubClient.closeSync();
+
+```
+
 ## Next steps
 
 You can learn more about Event Hubs by visiting the following links: