Utility class to invoke HotSpot diagnostic commands

.gitignore

@@ -4,6 +4,7 @@
 *.ear
 
 /build
+/out
 /lib
 /target
 

src/one/nio/mgt/DiagnosticCommand.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2019 Odnoklassniki Ltd, Mail.Ru Group
+ *
+ * Licensed 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 one.nio.mgt;
+
+import javax.management.JMException;
+import javax.management.ObjectName;
+import java.lang.management.ManagementFactory;
+
+public class DiagnosticCommand {
+
+    public static String execute(String command, String... args) throws JMException {
+        return (String) ManagementFactory.getPlatformMBeanServer().invoke(
+                new ObjectName("com.sun.management:type=DiagnosticCommand"),
+                command,
+                new Object[]{args},
+                new String[]{"[Ljava.lang.String;"});
+    }
+}

src/one/nio/mgt/ThreadDumper.java

@@ -20,25 +20,18 @@
 import org.apache.commons.logging.LogFactory;
 
 import javax.management.JMException;
-import javax.management.ObjectName;
 import java.io.OutputStream;
 import java.io.PrintStream;
-import java.lang.management.ManagementFactory;
 import java.util.concurrent.atomic.AtomicLong;
 
 public class ThreadDumper {
     private static final Log log = LogFactory.getLog(ThreadDumper.class);
     private static final AtomicLong dumpTime = new AtomicLong();
 
     public static void dump(OutputStream out) {
-        Object threadDump;
+        String threadDump;
         try {
-            threadDump = ManagementFactory.getPlatformMBeanServer().invoke(
-                    new ObjectName("com.sun.management:type=DiagnosticCommand"),
-                    "threadPrint",
-                    new Object[]{null},
-                    new String[]{"[Ljava.lang.String;"}
-            );
+            threadDump = DiagnosticCommand.execute("threadPrint");
         } catch (JMException e) {
             log.warn("Failed to get threads dump: " + e);
             return;