Introduce getAutodetectMode() in MBeanExporter

Closes gh-30855

spring-context/src/main/java/org/springframework/jmx/export/MBeanExporter.java

@@ -92,6 +92,7 @@ import org.springframework.util.ObjectUtils;
  * @author Rick Evans
  * @author Mark Fisher
  * @author Stephane Nicoll
+ * @author Sam Brannen
  * @since 1.2
  * @see #setBeans
  * @see #setAutodetect
@@ -227,6 +228,7 @@ public class MBeanExporter extends MBeanRegistrationSupport implements MBeanExpo
 	 * @throws IllegalArgumentException if the supplied value is not
 	 * one of the {@code AUTODETECT_} constants
 	 * @see #setAutodetectModeName(String)
+	 * @see #getAutodetectMode()
 	 * @see #AUTODETECT_ALL
 	 * @see #AUTODETECT_ASSEMBLER
 	 * @see #AUTODETECT_MBEAN
@@ -244,6 +246,7 @@ public class MBeanExporter extends MBeanRegistrationSupport implements MBeanExpo
 	 * @throws IllegalArgumentException if the supplied value is not resolvable
 	 * to one of the {@code AUTODETECT_} constants or is {@code null}
 	 * @see #setAutodetectMode(int)
+	 * @see #getAutodetectMode()
 	 * @see #AUTODETECT_ALL
 	 * @see #AUTODETECT_ASSEMBLER
 	 * @see #AUTODETECT_MBEAN
@@ -256,6 +259,19 @@ public class MBeanExporter extends MBeanRegistrationSupport implements MBeanExpo
 		this.autodetectMode = (Integer) constants.asNumber(constantName);
 	}
 
+	/**
+	 * Get the autodetect mode to use for this {@code MBeanExporter}.
+	 * @return the configured autodetect mode, or {@code null} if not explicitly
+	 * configured
+	 * @since 6.0.11
+	 * @see #setAutodetectModeName(String)
+	 * @see #setAutodetectMode(int)
+	 */
+	@Nullable
+	public Integer getAutodetectMode() {
+		return this.autodetectMode;
+	}
+
 	/**
 	 * Specify whether to allow eager initialization of candidate beans
 	 * when autodetecting MBeans in the Spring application context.

spring-context/src/test/java/org/springframework/jmx/export/MBeanExporterTests.java

@@ -441,47 +441,55 @@ public class MBeanExporterTests extends AbstractMBeanServerTests {
 	@Test
 	void setAutodetectModeToSupportedValue() {
 		exporter.setAutodetectMode(MBeanExporter.AUTODETECT_ASSEMBLER);
+		assertThat(exporter.getAutodetectMode()).isEqualTo(MBeanExporter.AUTODETECT_ASSEMBLER);
 	}
 
 	@Test
 	void setAutodetectModeToOutOfRangeNegativeValue() {
 		assertThatIllegalArgumentException()
 				.isThrownBy(() -> exporter.setAutodetectMode(-1));
+		assertThat(exporter.getAutodetectMode()).isNull();
 	}
 
 	@Test
 	void setAutodetectModeToOutOfRangePositiveValue() {
 		assertThatIllegalArgumentException()
 				.isThrownBy(() -> exporter.setAutodetectMode(5));
+		assertThat(exporter.getAutodetectMode()).isNull();
 	}
 
 	@Test
 	void setAutodetectModeNameToSupportedValue() {
 		exporter.setAutodetectModeName("AUTODETECT_ASSEMBLER");
+		assertThat(exporter.getAutodetectMode()).isEqualTo(MBeanExporter.AUTODETECT_ASSEMBLER);
 	}
 
 	@Test
 	void setAutodetectModeNameToNull() {
 		assertThatIllegalArgumentException()
 				.isThrownBy(() -> exporter.setAutodetectModeName(null));
+		assertThat(exporter.getAutodetectMode()).isNull();
 	}
 
 	@Test
 	void setAutodetectModeNameToAnEmptyString() {
 		assertThatIllegalArgumentException()
 				.isThrownBy(() -> exporter.setAutodetectModeName(""));
+		assertThat(exporter.getAutodetectMode()).isNull();
 	}
 
 	@Test
 	void setAutodetectModeNameToAWhitespacedString() {
 		assertThatIllegalArgumentException()
 				.isThrownBy(() -> exporter.setAutodetectModeName("  \t"));
+		assertThat(exporter.getAutodetectMode()).isNull();
 	}
 
 	@Test
 	void setAutodetectModeNameToARubbishValue() {
 		assertThatIllegalArgumentException()
 				.isThrownBy(() -> exporter.setAutodetectModeName("That Hansel is... *sssooo* hot right now!"));
+		assertThat(exporter.getAutodetectMode()).isNull();
 	}
 
 	@Test