[AMQ-6829] add inflight count to dstat queue output

activemq-console/src/main/java/org/apache/activemq/console/command/DstatCommand.java

@@ -118,10 +118,10 @@ public class DstatCommand extends AbstractJmxCommand {
         String query = JmxMBeansUtil.createQueryString(queryString, "Queue");
         List queueList = JmxMBeansUtil.queryMBeans(createJmxConnection(), query);
 
-        final String header = "%-50s  %10s  %10s  %10s  %10s  %10s  %10s  %10s";
-        final String tableRow = "%-50s  %10d  %10d  %10d  %10d  %10d  %10d  %10d";
+        final String header = "%-50s  %10s  %10s  %10s  %10s  %10s  %10s  %10s  %10s";
+        final String tableRow = "%-50s  %10d  %10d  %10d  %10d  %10d  %10d  %10d  %10d";
 
-        context.print(String.format(Locale.US, header, "Name", "Queue Size", "Producer #", "Consumer #", "Enqueue #", "Dequeue #", "Forward #", "Memory %"));
+        context.print(String.format(Locale.US, header, "Name", "Queue Size", "Producer #", "Consumer #", "Enqueue #", "Dequeue #", "Forward #", "Memory %", "Inflight #"));
 
         Collections.sort(queueList, new ObjectInstanceComparator());
 
@@ -144,7 +144,8 @@ public class DstatCommand extends AbstractJmxCommand {
                     queueView.getEnqueueCount(),
                     queueView.getDequeueCount(),
                     queueView.getForwardCount(),
-                    queueView.getMemoryPercentUsage()));
+                    queueView.getMemoryPercentUsage(),
+                    queueView.getInFlightCount()));
         }
     }
 

activemq-console/src/test/java/org/apache/activemq/console/DstatCommandTest.java

@@ -0,0 +1,88 @@
+/**
+ * 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.
+ */
+package org.apache.activemq.console;
+
+import org.apache.activemq.broker.BrokerService;
+import org.apache.activemq.command.ActiveMQDestination;
+import org.apache.activemq.command.ActiveMQQueue;
+import org.apache.activemq.command.ActiveMQTopic;
+import org.apache.activemq.console.command.DstatCommand;
+import org.apache.activemq.console.formatter.CommandShellOutputFormatter;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.slf4j.LoggerFactory;
+
+import java.io.ByteArrayOutputStream;
+import java.util.Arrays;
+import java.util.LinkedList;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+public class DstatCommandTest {
+    private static final org.slf4j.Logger LOG = LoggerFactory.getLogger(DstatCommandTest.class);
+
+    final String CONNECTOR_NAME="tcp-openWire";
+
+    BrokerService brokerService;
+
+
+    @Before
+    public void createBroker() throws Exception {
+        brokerService = new BrokerService();
+        brokerService.getManagementContext().setCreateConnector(false);
+        brokerService.setPersistent(false);
+        brokerService.setDestinations(new ActiveMQDestination[]{new ActiveMQQueue("Q1"), new ActiveMQQueue("Q2"), new ActiveMQTopic("T1")});
+        brokerService.addConnector("tcp://0.0.0.0:0").setName(CONNECTOR_NAME);
+        brokerService.start();
+    }
+
+    @After
+    public void stopBroker() throws Exception {
+        if (brokerService != null) {
+            brokerService.stop();
+        }
+    }
+
+    @Test
+    public void verifyInflightAttribute() throws Exception {
+        String result = executeQuery("");
+        LOG.info("Result:" + result);
+        assertFalse("Output valid", result.contains("Inflight"));
+
+        result = executeQuery("queues");
+        LOG.info("Result:" + result);
+        assertTrue("Output valid", result.contains("Inflight"));
+    }
+
+    private String executeQuery(String query) throws Exception {
+        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(1024);
+        CommandContext context = new CommandContext();
+        context.setFormatter(new CommandShellOutputFormatter(byteArrayOutputStream));
+
+        DstatCommand queryCommand = new DstatCommand();
+        queryCommand.setJmxUseLocal(true);
+        queryCommand.setCommandContext(context);
+
+        LinkedList<String> args = new LinkedList<>();
+        args.addAll(Arrays.asList(query.split(" ")));
+        queryCommand.execute(args);
+
+        return byteArrayOutputStream.toString();
+    }
+}