1 files changed, 80 insertions, 0 deletions
diff --git a/standardization/moher-api/server-adapters/reactor-netty/src/main/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/reactornetty/HealthRoutes.java b/standardization/moher-api/server-adapters/reactor-netty/src/main/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/reactornetty/HealthRoutes.java
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+++ b/standardization/moher-api/server-adapters/reactor-netty/src/main/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/reactornetty/HealthRoutes.java
@@ -0,0 +1,80 @@
+/*
+ * ============LICENSE_START====================================
+ * DCAEGEN2-SERVICES-SDK
+ * =========================================================
+ * Copyright (C) 2019 Nokia. 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.dcaegen2.services.sdk.standardization.moher.adapters.reactornetty;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import io.netty.handler.codec.http.HttpHeaderNames;
+import io.netty.handler.codec.http.HttpResponseStatus;
+import java.util.function.Consumer;
+import org.onap.dcaegen2.services.sdk.standardization.moher.health.api.AliveMessage;
+import org.onap.dcaegen2.services.sdk.standardization.moher.health.api.GsonAdaptersHealth;
+import org.onap.dcaegen2.services.sdk.standardization.moher.health.api.Health;
+import org.onap.dcaegen2.services.sdk.standardization.moher.health.api.HealthProvider;
+import org.reactivestreams.Publisher;
+import reactor.core.publisher.Mono;
+import reactor.netty.http.server.HttpServerRequest;
+import reactor.netty.http.server.HttpServerResponse;
+import reactor.netty.http.server.HttpServerRoutes;
+
+public class HealthRoutes implements Consumer<HttpServerRoutes> {
+
+    public static final String APPLICATION_JSON = "application/json";
+    private final Gson gson;
+    private final HealthProvider healthProvider;
+
+    public HealthRoutes(Gson gson,
+            HealthProvider healthProvider) {
+        this.gson = gson;
+        this.healthProvider = healthProvider;
+    }
+
+    public static HealthRoutes create(HealthProvider healthProvider) {
+        GsonBuilder gson = new GsonBuilder();
+        gson.registerTypeAdapterFactory(new GsonAdaptersHealth());
+        return new HealthRoutes(gson.create(), healthProvider);
+    }
+
+    @Override
+    public void accept(HttpServerRoutes routes) {
+        routes.get("/health/ready", this::readinessCheck);
+        routes.get("/health/alive", this::livenessCheck);
+    }
+
+    private Publisher<Void> readinessCheck(HttpServerRequest httpServerRequest, HttpServerResponse httpServerResponse) {
+        return healthProvider.currentHealth()
+                .flatMapMany(health ->
+                        httpServerResponse.status(statusForHealth(health))
+                                .header(HttpHeaderNames.CONTENT_TYPE, APPLICATION_JSON)
+                                .sendString(Mono.just(health).map(gson::toJson))
+                );
+    }
+
+    private Publisher<Void> livenessCheck(HttpServerRequest httpServerRequest, HttpServerResponse httpServerResponse) {
+        return httpServerResponse.status(HttpResponseStatus.OK)
+                .header(HttpHeaderNames.CONTENT_TYPE, APPLICATION_JSON)
+                .sendString(Mono.just(AliveMessage.ALIVE_MESSAGE_JSON));
+    }
+
+    private HttpResponseStatus statusForHealth(Health health) {
+        return health.healthy() ? HttpResponseStatus.OK : HttpResponseStatus.SERVICE_UNAVAILABLE;
+    }
+}