Make echo liveness probe available under /actuator/health for resources

- implement spring's HealthIndicator interface to provide health probe based on AaiGraphChecker
- conditionally enable the probe when aai.actuator.echo.enabled=true
- increase snapshot version to 1.15.6-SNAPSHOT

Issue-ID: AAI-3959
Change-Id: Ie2b49ad1f3145285be844bb11aa8119a16fb68c9
Signed-off-by: Fiete Ostkamp <Fiete.Ostkamp@telekom.de>

1 files changed, 50 insertions, 0 deletions

diff --git a/aai-resources/src/main/java/org/onap/aai/rest/util/EchoHealthIndicator.java b/aai-resources/src/main/java/org/onap/aai/rest/util/EchoHealthIndicator.java
new file mode 100644
index 0000000..fd5dbcf
--- /dev/null
+++ b/aai-resources/src/main/java/org/onap/aai/rest/util/EchoHealthIndicator.java
@@ -0,0 +1,50 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2024 Deutsche Telekom. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.aai.rest.util;
+
+import org.onap.aai.tasks.AaiGraphChecker;
+import org.onap.aai.tasks.AaiGraphChecker.CheckerType;
+import org.springframework.boot.actuate.health.Health;
+import org.springframework.boot.actuate.health.HealthIndicator;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.stereotype.Component;
+
+import lombok.RequiredArgsConstructor;
+
+@Component
+@RequiredArgsConstructor
+@ConditionalOnProperty(name = "aai.actuator.echo.enabled", havingValue = "true")
+public class EchoHealthIndicator implements HealthIndicator {
+
+  private final AaiGraphChecker aaiGraphChecker;
+
+	@Override
+	public Health health() {
+    return healthy()
+      ? Health.up().build()
+      : Health.down().build();
+	}
+
+	private boolean healthy() {
+    return aaiGraphChecker.isAaiGraphDbAvailable(CheckerType.ACTUAL);
+	}
+
+}