Add OpenJ9DiagnosticsMXBean.getDumpOptions

There should be a getter to match the setter.

Issue eclipse-openj9#20587

Signed-off-by: Peter Shipton <[email protected]>

jcl/src/jdk.management/share/classes/openj9/lang/management/OpenJ9DiagnosticsMXBean.java

@@ -71,10 +71,22 @@ public interface OpenJ9DiagnosticsMXBean extends PlatformManagedObject {
 	 * with the initial -Xdump: omitted. See the -Xdump option section on dump agents in
 	 * the documentation for the OpenJ9 JVM.
 	 *
+	 * @return the dump configuration as an array of Strings
 	 * @throws SecurityException if there is a security manager and it doesn't allow the checks required to read the dump settings
 	 */
 	public String[] queryDumpOptions();
 
+	/**
+	 * Returns the current dump configuration as a comma-separated String, or null if an internal error occurs.
+	 * The syntax of the option String is the same as the -Xdump command-line option,
+	 * with the initial -Xdump: omitted. See the -Xdump option section on dump agents in
+	 * the documentation for the OpenJ9 JVM.
+	 *
+	 * @return the dump configuration as a comma-separated String
+	 * @throws SecurityException if there is a security manager and it doesn't allow the checks required to read the dump settings
+	 */
+	public String getDumpOptions();
+
 	/**
 	 * This function sets options for the dump subsystem.
 	 * The dump option is passed in as a String. Use the same syntax as the -Xdump command-line option, with the
@@ -143,7 +155,7 @@ public interface OpenJ9DiagnosticsMXBean extends PlatformManagedObject {
 	/**
 	 * This function triggers the heap dump agent and requests for a heap dump in CLASSIC format.
 	 *
-	 * @return The file name of the dump that was created
+	 * @return the file name of the dump that was created
 	 * @throws InvalidOptionException if the dump operation fails
 	 * @throws RuntimeException if the JVM does not contain RAS dump support
 	 * @throws SecurityException if there is a security manager and it doesn't allow the checks required to trigger this dump

jcl/src/jdk.management/share/classes/openj9/lang/management/internal/OpenJ9DiagnosticsMXBeanImpl.java

@@ -131,6 +131,22 @@ public String[] queryDumpOptions() {
 		}
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public String getDumpOptions() {
+		String[] options = queryDumpOptions();
+		StringBuilder builder = new StringBuilder();
+		for (int i = 0; i < options.length; i++) {
+			if (i != 0) {
+				builder.append(',');
+			}
+			builder.append(options[i]);
+		}
+		return builder.toString();
+	}
+
 	/**
 	 * {@inheritDoc}
 	 */