Deprecate AppOptics as it has retired

Closes gh-51810

module/spring-boot-micrometer-metrics/src/main/java/org/springframework/boot/micrometer/metrics/autoconfigure/export/appoptics/AppOpticsMetricsExportAutoConfiguration.java

@@ -39,6 +39,8 @@ import org.springframework.context.annotation.Bean;
  * @author Stephane Nicoll
  * @author Artsiom Yudovin
  * @since 4.0.0
+ * @deprecated since 4.2.0 for removal in 4.4.0 with no replacement as AppOptics has
+ * retired
  */
 @AutoConfiguration(
 		before = { CompositeMeterRegistryAutoConfiguration.class, SimpleMetricsExportAutoConfiguration.class },
@@ -47,6 +49,8 @@ import org.springframework.context.annotation.Bean;
 @ConditionalOnClass(AppOpticsMeterRegistry.class)
 @ConditionalOnEnabledMetricsExport("appoptics")
 @EnableConfigurationProperties(AppOpticsProperties.class)
+@Deprecated(since = "4.2.0", forRemoval = true)
+@SuppressWarnings("removal")
 public final class AppOpticsMetricsExportAutoConfiguration {
 
 	private final AppOpticsProperties properties;

module/spring-boot-micrometer-metrics/src/main/java/org/springframework/boot/micrometer/metrics/autoconfigure/export/appoptics/AppOpticsProperties.java

@@ -29,8 +29,11 @@ import org.springframework.boot.micrometer.metrics.autoconfigure.export.properti
  *
  * @author Stephane Nicoll
  * @since 4.0.0
+ * @deprecated since 4.2.0 for removal in 4.4.0 with no replacement as AppOptics has
+ * retired
  */
 @ConfigurationProperties("management.appoptics.metrics.export")
+@Deprecated(since = "4.2.0", forRemoval = true)
 public class AppOpticsProperties extends StepRegistryProperties {
 
 	/**

module/spring-boot-micrometer-metrics/src/main/java/org/springframework/boot/micrometer/metrics/autoconfigure/export/appoptics/AppOpticsPropertiesConfigAdapter.java

@@ -25,7 +25,11 @@ import org.springframework.boot.micrometer.metrics.autoconfigure.export.properti
  * Adapter to convert {@link AppOpticsProperties} to an {@link AppOpticsConfig}.
  *
  * @author Stephane Nicoll
+ * @deprecated since 4.2.0 for removal in 4.4.0 with no replacement as AppOptics has
+ * retired
  */
+@Deprecated(since = "4.2.0", forRemoval = true)
+@SuppressWarnings("removal")
 class AppOpticsPropertiesConfigAdapter extends StepRegistryPropertiesConfigAdapter<AppOpticsProperties>
 		implements AppOpticsConfig {
 

module/spring-boot-micrometer-metrics/src/test/java/org/springframework/boot/micrometer/metrics/autoconfigure/export/appoptics/AppOpticsMetricsExportAutoConfigurationTests.java

@@ -33,7 +33,11 @@ import static org.assertj.core.api.Assertions.assertThat;
  * Tests for {@link AppOpticsMetricsExportAutoConfiguration}.
  *
  * @author Stephane Nicoll
+ * @deprecated since 4.2.0 for removal in 4.4.0 with no replacement as AppOptics has
+ * retired
  */
+@Deprecated(since = "4.2.0", forRemoval = true)
+@SuppressWarnings("removal")
 class AppOpticsMetricsExportAutoConfigurationTests {
 
 	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()

module/spring-boot-micrometer-metrics/src/test/java/org/springframework/boot/micrometer/metrics/autoconfigure/export/appoptics/AppOpticsPropertiesConfigAdapterTests.java

@@ -26,7 +26,11 @@ import static org.assertj.core.api.Assertions.assertThat;
  * Tests for {@link AppOpticsPropertiesConfigAdapter}.
  *
  * @author Stephane Nicoll
+ * @deprecated since 4.2.0 for removal in 4.4.0 with no replacement as AppOptics has
+ * retired
  */
+@Deprecated(since = "4.2.0", forRemoval = true)
+@SuppressWarnings("removal")
 class AppOpticsPropertiesConfigAdapterTests
 		extends StepRegistryPropertiesConfigAdapterTests<AppOpticsProperties, AppOpticsPropertiesConfigAdapter> {
 

module/spring-boot-micrometer-metrics/src/test/java/org/springframework/boot/micrometer/metrics/autoconfigure/export/appoptics/AppOpticsPropertiesTests.java

@@ -27,7 +27,11 @@ import static org.assertj.core.api.Assertions.assertThat;
  * Tests for {@link AppOpticsProperties}.
  *
  * @author Stephane Nicoll
+ * @deprecated since 4.2.0 for removal in 4.4.0 with no replacement as AppOptics has
+ * retired
  */
+@Deprecated(since = "4.2.0", forRemoval = true)
+@SuppressWarnings("removal")
 class AppOpticsPropertiesTests extends StepRegistryPropertiesTests {
 
 	@Test