Remove topic concepts from oms

openmessaging-api-samples/src/main/java/io/openmessaging/samples/consumer/PushConsumerApp.java

@@ -38,7 +38,7 @@ public static void main(String[] args) throws OMSResourceNotExistException {
             String simpleQueue = "HELLO_QUEUE";
             resourceManager.createQueue("NS1", simpleQueue, OMS.newKeyValue());
 
-            //This queue doesn't has a source topic, so only the message delivered to the queue directly can
+            //This queue doesn't has a source queue, so only the message delivered to the queue directly can
             //be consumed by this consumer.
             consumer.attachQueue(simpleQueue, new MessageListener() {
                 @Override
@@ -56,14 +56,23 @@ public void onReceived(Message message, Context context) {
         //Consume messages from a complex queue.
         final PushConsumer anotherConsumer = messagingAccessPoint.createPushConsumer();
         {
-            String complexQueue = "QUEUE_HAS_SOURCE_TOPIC";
-            String sourceTopic = "SOURCE_TOPIC";
+            String complexQueue = "QUEUE_WITH_SOURCE_QUEUE";
+            String sourceQueue = "SOURCE_QUEUE";
 
             //Create the complex queue.
             resourceManager.createQueue("NS_01", complexQueue, OMS.newKeyValue());
-            //Create the source topic.
-            resourceManager.createTopic("NS_01", sourceTopic, OMS.newKeyValue());
+            //Create the source queue.
+            resourceManager.createQueue("NS_01", sourceQueue, OMS.newKeyValue());
 
+            anotherConsumer.attachQueue(complexQueue, new MessageListener() {
+                @Override
+                public void onReceived(Message message, Context context) {
+                    //The message sent to the sourceQueue will be delivered to anotherConsumer
+                    System.out.println("Received one message: " + message);
+                    context.ack();
+                }
+
+            });
         }
 
         Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {

openmessaging-api-samples/src/main/java/io/openmessaging/samples/consumer/StreamingConsumerApp.java

@@ -39,7 +39,7 @@ public static void main(String[] args) {
         }
 
         //Persist the consume offset.
-        messageIterator.commit(true);
+        messageIterator.commit();
 
         Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
             @Override

openmessaging-api-samples/src/main/java/io/openmessaging/samples/producer/AnotherProducerApp.java

@@ -19,8 +19,8 @@
 
 import io.openmessaging.MessagingAccessPoint;
 import io.openmessaging.OMS;
+import io.openmessaging.producer.BatchMessageSender;
 import io.openmessaging.producer.Producer;
-import io.openmessaging.producer.SendResult;
 import java.nio.charset.Charset;
 
 public class AnotherProducerApp {
@@ -35,32 +35,32 @@ public static void main(String[] args) {
         producer.startup();
         System.out.println("Producer startup OK");
 
-        Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
-            @Override
-            public void run() {
-                producer.shutdown();
-                messagingAccessPoint.shutdown();
-            }
-        }));
+        BatchMessageSender batchMessageSender = producer.createBatchMessageSender();
 
-        SendResult result = producer.send(producer.createTopicBytesMessage(
-            "HELLO_TOPIC1", "HELLO_BODY1".getBytes(Charset.forName("UTF-8"))));
+        batchMessageSender.send(producer.createQueueBytesMessage(
+            "HELLO_QUEUE1", "HELLO_BODY1".getBytes(Charset.forName("UTF-8"))));
 
-        System.out.println("Send first message to topic OK, message id is: " + result.messageId());
-
-        producer.send(producer.createTopicBytesMessage(
-            "HELLO_TOPIC2", "HELLO_BODY2".getBytes(Charset.forName("UTF-8")))
+        batchMessageSender.send(producer.createQueueBytesMessage(
+            "HELLO_QUEUE2", "HELLO_BODY2".getBytes(Charset.forName("UTF-8")))
             .putUserHeaders("KEY1", 100)
             .putUserHeaders("KEY2", 200L)
             .putUserHeaders("KEY3", 3.14)
             .putUserHeaders("KEY4", "value4")
         );
 
-        System.out.println("Send second message to topic OK");
-
-        producer.send(producer.createQueueBytesMessage(
+        batchMessageSender.send(producer.createQueueBytesMessage(
             "HELLO_QUEUE", "HELLO_BODY".getBytes(Charset.forName("UTF-8"))));
 
-        System.out.println("send third message to queue OK");
+        batchMessageSender.commit();
+
+        System.out.println("Send a batch of messages OK");
+
+        Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
+            @Override
+            public void run() {
+                producer.shutdown();
+                messagingAccessPoint.shutdown();
+            }
+        }));
     }
 }

openmessaging-api-samples/src/main/java/io/openmessaging/samples/producer/ProducerApp.java

@@ -37,36 +37,27 @@ public static void main(String[] args) {
         producer.startup();
         System.out.println("Producer startup OK");
 
-        //Add a shutdown hook
-        Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
-            @Override
-            public void run() {
-                producer.shutdown();
-                messagingAccessPoint.shutdown();
-            }
-        }));
-
         //Sync
         {
-            SendResult sendResult = producer.send(producer.createTopicBytesMessage(
-                "HELLO_TOPIC", "HELLO_BODY".getBytes(Charset.forName("UTF-8"))));
+            SendResult sendResult = producer.send(producer.createQueueBytesMessage(
+                "HELLO_QUEUE", "HELLO_BODY".getBytes(Charset.forName("UTF-8"))));
 
             System.out.println("Send sync message OK, message id is: " + sendResult.messageId());
         }
 
         //Async with Promise
         {
-            final Future<SendResult> result = producer.sendAsync(producer.createTopicBytesMessage(
-                "HELLO_TOPIC", "HELLO_BODY".getBytes(Charset.forName("UTF-8"))));
+            final Future<SendResult> result = producer.sendAsync(producer.createQueueBytesMessage(
+                "HELLO_QUEUE", "HELLO_BODY".getBytes(Charset.forName("UTF-8"))));
 
             final SendResult sendResult = result.get(3000L);
             System.out.println("Send async message OK, message id is: " + sendResult.messageId());
         }
 
         //Async with FutureListener
         {
-            final Future<SendResult> result = producer.sendAsync(producer.createTopicBytesMessage(
-                "HELLO_TOPIC", "HELLO_BODY".getBytes(Charset.forName("UTF-8"))));
+            final Future<SendResult> result = producer.sendAsync(producer.createQueueBytesMessage(
+                "HELLO_QUEUE", "HELLO_BODY".getBytes(Charset.forName("UTF-8"))));
 
             result.addListener(new FutureListener<SendResult>() {
                 @Override
@@ -83,10 +74,18 @@ public void operationFailed(Future<SendResult> promise) {
 
         //Oneway
         {
-            producer.sendOneway(producer.createTopicBytesMessage(
-                "HELLO_TOPIC", "HELLO_BODY".getBytes(Charset.forName("UTF-8"))));
+            producer.sendOneway(producer.createQueueBytesMessage(
+                "HELLO_QUEUE", "HELLO_BODY".getBytes(Charset.forName("UTF-8"))));
 
             System.out.println("Send oneway message OK");
         }
+
+        Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
+            @Override
+            public void run() {
+                producer.shutdown();
+                messagingAccessPoint.shutdown();
+            }
+        }));
     }
 }

openmessaging-api/README.md

@@ -1,10 +1,9 @@
 ## Server Side
 * Namespace
-* Topic
 * Queue
     * Stream
 * Routing
-    * Operator
+    * Expression
 
 ## Client Side
 * Producer

openmessaging-api/src/main/java/io/openmessaging/Message.java

@@ -131,16 +131,6 @@ interface BuiltinKeys {
          */
         String MessageId = "MessageId";
 
-        /**
-         * The {@code Topic} header field is the destination which the message is being sent.
-         * <p>
-         * When a message is sent this value is should be set properly.
-         * <p>
-         * When a message is received, its {@code Topic} value must be equivalent to the
-         * value assigned when it was sent.
-         */
-        String Topic = "Topic";
-
         /**
          * The {@code Queue} header field is the destination which the message is being sent.
          * <p>
@@ -284,6 +274,6 @@ interface BuiltinKeys {
          */
         String RetryReason = "RetryReason";
 
-        String Stream = "Stream";
+        String StreamName = "StreamName";
     }
 }

openmessaging-api/src/main/java/io/openmessaging/MessageFactory.java

@@ -24,19 +24,6 @@
  *
  */
 public interface MessageFactory {
-    /**
-     * Creates a {@code BytesMessage} object. A {@code BytesMessage} object is used to send a message containing a
-     * stream of uninterpreted bytes.
-     * <p>
-     * The returned {@code BytesMessage} object only can be sent to the specified topic.
-     *
-     * @param topic the target topic to send
-     * @param body the body data for a message
-     * @return the created {@code BytesMessage} object
-     * @throws OMSRuntimeException if the OMS provider fails to create this message due to some internal error.
-     */
-    BytesMessage createTopicBytesMessage(String topic, byte[] body);
-
     /**
      * Creates a {@code BytesMessage} object. A {@code BytesMessage} object is used to send a message containing a
      * stream of uninterpreted bytes.

openmessaging-api/src/main/java/io/openmessaging/MessagingAccessPoint.java

@@ -22,17 +22,16 @@
 import io.openmessaging.consumer.PushConsumer;
 import io.openmessaging.consumer.StreamingConsumer;
 import io.openmessaging.exception.OMSRuntimeException;
-import io.openmessaging.observer.Observer;
 import io.openmessaging.producer.Producer;
 import java.util.List;
 
 /**
- * The {@code MessagingAccessPoint} obtained from {@link MessagingAccessPointFactory} is capable of creating {@code
+ * The {@code MessagingAccessPoint} obtained from {@link OMS} is capable of creating {@code
  * Producer}, {@code Consumer}, {@code ServiceEndPoint}, and so on. <p> For example:
  * <pre>
  * MessagingAccessPoint messagingAccessPoint = MessagingAccessPointFactory.getMessagingAccessPoint("openmessaging:rocketmq://localhost:10911/namespace");
  * Producer producer = messagingAccessPoint.createProducer();
- * producer.send(producer.createTopicBytesMessage("HELLO_TOPIC", "HELLO_BODY".getBytes(Charset.forName("UTF-8"))));
+ * producer.send(producer.createQueueBytesMessage("HELLO_QUEUE", "HELLO_BODY".getBytes(Charset.forName("UTF-8"))));
  * </pre>
  *
  * @version OMS 1.0
@@ -158,30 +157,30 @@ public interface MessagingAccessPoint extends ServiceLifecycle {
     ResourceManager getResourceManager();
 
     /**
-     * Register an observer in an serviceEndPoint object. Whenever serviceEndPoint object publish or bind an service
-     * object, it will be notified to the list of observer object registered before
+     * Returns the {@code Producer} list created by the specified {@code MessagingAccessPoint}
      *
-     * @param observer observer event object to an serviceEndPoint object
+     * @return the producer list
      */
-    void addObserver(Observer observer);
+    List<Producer> producers();
 
     /**
-     * Removes the given observer from the list of observer
-     * <p>
-     * If the given observer has not been previously registered (i.e. it was
-     * never added) then this method call is a no-op. If it had been previously
-     * added then it will be removed. If it had been added more than once, then
-     * only the first occurrence will be removed.
+     * Returns the {@code PushConsumer} list created by the specified {@code MessagingAccessPoint}
      *
-     * @param observer The observer to remove
+     * @return the push consumer list
      */
-    void removeObserver(Observer observer);
-
-    List<Producer> producers();
-
     List<PushConsumer> pushConsumers();
 
+    /**
+     * Returns the {@code StreamingConsumer} list created by the specified {@code MessagingAccessPoint}
+     *
+     * @return the streaming consumer list
+     */
     List<StreamingConsumer> streamingConsumers();
 
+    /**
+     * Returns the {@code PullConsumer} list created by the specified {@code MessagingAccessPoint}
+     *
+     * @return the pull consumer list
+     */
     List<PullConsumer> pullConsumers();
 }