Monitoring API - write framework adapters

Change-Id: Iaba9c4ef6022d01c1f572055316700a3a4dfa8f2
Issue-ID: DCAEGEN2-1589
Signed-off-by: Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

12 files changed, 678 insertions, 36 deletions

diff --git a/standardization/moher-api/server-adapters/pom.xml b/standardization/moher-api/server-adapters/pom.xml
index 4b8f4a55..94d83473 100644
--- a/standardization/moher-api/server-adapters/pom.xml
+++ b/standardization/moher-api/server-adapters/pom.xml
@@ -35,7 +35,7 @@
     <packaging>pom</packaging>
 
     <modules>
-        <module>spring</module>
+        <module>spring-webflux</module>
         <module>reactor-netty</module>
     </modules>
 </project>
\ No newline at end of file
diff --git a/standardization/moher-api/server-adapters/reactor-netty/pom.xml b/standardization/moher-api/server-adapters/reactor-netty/pom.xml
index f2f37412..9ae7df4c 100644
--- a/standardization/moher-api/server-adapters/reactor-netty/pom.xml
+++ b/standardization/moher-api/server-adapters/reactor-netty/pom.xml
@@ -32,4 +32,34 @@
     <description>MoHeR Project Reactor's Netty server adapter</description>
     <artifactId>dcae-sdk-moher-reactor-netty</artifactId>
 
+    <dependencies>
+        <dependency>
+            <groupId>io.projectreactor.netty</groupId>
+            <artifactId>reactor-netty</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.onap.dcaegen2.services.sdk</groupId>
+            <artifactId>dcaegen2-sdk-moher-metrics</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.onap.dcaegen2.services.sdk</groupId>
+            <artifactId>dcaegen2-sdk-moher-healthstate</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.onap.dcaegen2.services.sdk.rest.services</groupId>
+            <artifactId>http-client</artifactId>
+            <version>${project.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
 </project>
\ No newline at end of file
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
new file mode 100644
index 00000000..1b6411de
--- /dev/null
+++ 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;
+    }
+}
diff --git a/standardization/moher-api/server-adapters/reactor-netty/src/main/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/reactornetty/MetricsRoutes.java b/standardization/moher-api/server-adapters/reactor-netty/src/main/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/reactornetty/MetricsRoutes.java
new file mode 100644
index 00000000..b6db874d
--- /dev/null
+++ b/standardization/moher-api/server-adapters/reactor-netty/src/main/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/reactornetty/MetricsRoutes.java
@@ -0,0 +1,49 @@
+/*
+ * ============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 java.util.function.Consumer;
+import org.onap.dcaegen2.services.sdk.standardization.moher.metrics.api.Metrics;
+import org.reactivestreams.Publisher;
+import reactor.netty.http.server.HttpServerRequest;
+import reactor.netty.http.server.HttpServerResponse;
+import reactor.netty.http.server.HttpServerRoutes;
+
+public class MetricsRoutes implements Consumer<HttpServerRoutes> {
+
+    private final Metrics metrics;
+
+    public MetricsRoutes(Metrics metrics) {
+        this.metrics = metrics;
+    }
+
+    @Override
+    public void accept(HttpServerRoutes routes) {
+        routes.get("/metrics", this::prometheusMetrics);
+    }
+
+    private Publisher<Void> prometheusMetrics(
+            HttpServerRequest httpServerRequest,
+            HttpServerResponse httpServerResponse) {
+        return httpServerResponse.sendString(metrics.collect());
+    }
+
+}
diff --git a/standardization/moher-api/server-adapters/reactor-netty/src/test/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/reactornetty/HealthRoutesIT.java b/standardization/moher-api/server-adapters/reactor-netty/src/test/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/reactornetty/HealthRoutesIT.java
new file mode 100644
index 00000000..367f50e3
--- /dev/null
+++ b/standardization/moher-api/server-adapters/reactor-netty/src/test/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/reactornetty/HealthRoutesIT.java
@@ -0,0 +1,122 @@
+/*
+ * ============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 static org.assertj.core.api.Assertions.assertThat;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import java.nio.charset.StandardCharsets;
+import java.time.Duration;
+import java.util.concurrent.atomic.AtomicReference;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.HttpMethod;
+import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.HttpResponse;
+import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.ImmutableHttpRequest;
+import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.RxHttpClient;
+import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.RxHttpClientFactory;
+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 reactor.netty.DisposableServer;
+import reactor.netty.http.server.HttpServer;
+
+class HealthRoutesIT {
+
+    private static final Duration TIMEOUT = Duration.ofSeconds(5);
+    private final AtomicReference<Health> currentHealth = new AtomicReference<>();
+    private final HealthRoutes sut = HealthRoutes.create(HealthProvider.fromSupplier(currentHealth::get));
+    private final RxHttpClient rxHttpClient = RxHttpClientFactory.create();
+    private final Gson gsonForDeserialization = new GsonBuilder()
+            .registerTypeAdapterFactory(new GsonAdaptersHealth())
+            .create();
+    private DisposableServer server;
+    private String baseUrl;
+
+    @BeforeEach
+    void setUp() {
+        server = HttpServer.create().route(sut).bindNow();
+        baseUrl = String.format("http://%s:%d", server.host(), server.port());
+    }
+
+    @AfterEach
+    void tearDown() {
+        server.disposeNow(TIMEOUT);
+    }
+
+    @Test
+    void readinessProbeShouldReturnOkWhenHealthy() {
+        // given
+        final Health expectedHealth = Health.createHealthy("Ready to go");
+        currentHealth.set(expectedHealth);
+        final String url = baseUrl + "/health/ready";
+
+        // when
+        final HttpResponse response = rxHttpClient
+                .call(ImmutableHttpRequest.builder().method(HttpMethod.GET).url(url).build())
+                .block(TIMEOUT);
+
+        // then
+        assertThat(response.successful()).describedAs("response should be successful").isTrue();
+        final Health actualHealth = response.bodyAsJson(StandardCharsets.UTF_8, gsonForDeserialization, Health.class);
+        assertThat(actualHealth).describedAs("response body").isEqualTo(expectedHealth);
+    }
+
+    @Test
+    void readinessProbeShouldReturnUnavailableWhenNotHealthy() {
+        // given
+        final Health expectedHealth = Health.createUnhealthy("Waiting for CBS update");
+        currentHealth.set(expectedHealth);
+        final String url = baseUrl + "/health/ready";
+
+        // when
+        final HttpResponse response = rxHttpClient
+                .call(ImmutableHttpRequest.builder().method(HttpMethod.GET).url(url).build())
+                .block(TIMEOUT);
+
+        // then
+        assertThat(response.statusCode()).describedAs("response status code")
+                .isGreaterThanOrEqualTo(500)
+                .isLessThan(600);
+        assertThat(response.successful()).describedAs("response should not be successful").isFalse();
+        final Health actualHealth = response.bodyAsJson(StandardCharsets.UTF_8, gsonForDeserialization, Health.class);
+        assertThat(actualHealth).describedAs("response body").isEqualTo(expectedHealth);
+    }
+
+    @Test
+    void livenessProbeShouldAlwaysReturnOk() {
+        // given
+        final String url = baseUrl + "/health/alive";
+
+        // when
+        final HttpResponse response = rxHttpClient
+                .call(ImmutableHttpRequest.builder().method(HttpMethod.GET).url(url).build())
+                .block(TIMEOUT);
+
+        // then
+        assertThat(response.successful()).describedAs("response should be successful").isTrue();
+        assertThat(response.bodyAsString()).describedAs("response body").isEqualTo(AliveMessage.ALIVE_MESSAGE_JSON);
+    }
+
+}
\ No newline at end of file
diff --git a/standardization/moher-api/server-adapters/reactor-netty/src/test/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/reactornetty/MetricsRoutesIT.java b/standardization/moher-api/server-adapters/reactor-netty/src/test/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/reactornetty/MetricsRoutesIT.java
new file mode 100644
index 00000000..55c24c73
--- /dev/null
+++ b/standardization/moher-api/server-adapters/reactor-netty/src/test/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/reactornetty/MetricsRoutesIT.java
@@ -0,0 +1,71 @@
+/*
+ * ============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 static org.assertj.core.api.Assertions.assertThat;
+
+import java.time.Duration;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.HttpMethod;
+import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.HttpResponse;
+import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.ImmutableHttpRequest;
+import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.RxHttpClient;
+import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.RxHttpClientFactory;
+import org.onap.dcaegen2.services.sdk.standardization.moher.metrics.api.Metrics;
+import org.onap.dcaegen2.services.sdk.standardization.moher.metrics.api.MetricsFactory;
+import reactor.netty.DisposableServer;
+import reactor.netty.http.server.HttpServer;
+
+class MetricsRoutesIT {
+
+    private static final Duration TIMEOUT = Duration.ofSeconds(5);
+    private final Metrics metrics = MetricsFactory.createMetrics(MetricsFactory.createDefaultRegistry());
+    private final MetricsRoutes sut = new MetricsRoutes(metrics);
+    private final RxHttpClient rxHttpClient = RxHttpClientFactory.create();
+    private DisposableServer server;
+
+    @BeforeEach
+    void setUp() {
+        server = HttpServer.create().route(sut).bindNow();
+    }
+
+    @AfterEach
+    void tearDown() {
+        server.disposeNow(TIMEOUT);
+    }
+
+    @Test
+    void prometheusMetrics() {
+        // given
+        final String url = String.format("http://%s:%d/metrics", server.host(), server.port());
+
+        // when
+        final HttpResponse response = rxHttpClient
+                .call(ImmutableHttpRequest.builder().method(HttpMethod.GET).url(url).build())
+                .block(TIMEOUT);
+
+        // then
+        assertThat(response.successful()).describedAs("response should be successfull").isTrue();
+        assertThat(response.bodyAsString()).describedAs("response body").contains("system_cpu", "jvm_classes");
+    }
+}
\ No newline at end of file
diff --git a/standardization/moher-api/server-adapters/spring-webflux/pom.xml b/standardization/moher-api/server-adapters/spring-webflux/pom.xml
new file mode 100644
index 00000000..7eff97aa
--- /dev/null
+++ b/standardization/moher-api/server-adapters/spring-webflux/pom.xml
@@ -0,0 +1,81 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ ============LICENSE_START=======================================================
+  ~ DCAEGEN2-SERVICES-SDK
+  ~ ================================================================================
+  ~ Copyright (C) 2019 Nokia
+  ~ ================================================================================
+  ~ 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=========================================================
+  -->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <artifactId>dcaegen2-sdk-moher-server-adapters</artifactId>
+        <groupId>org.onap.dcaegen2.services.sdk</groupId>
+        <version>1.2.0-SNAPSHOT</version>
+    </parent>
+
+    <name>Monitoring and Healthcheck :: Server Adapters :: Spring Webflux</name>
+    <description>MoHeR Spring server adapter</description>
+    <artifactId>dcae-sdk-moher-spring-webflux</artifactId>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-failsafe-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-webflux</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.onap.dcaegen2.services.sdk</groupId>
+            <artifactId>dcaegen2-sdk-moher-metrics</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.onap.dcaegen2.services.sdk</groupId>
+            <artifactId>dcaegen2-sdk-moher-healthstate</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.hamcrest</groupId>
+            <artifactId>hamcrest-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-test</artifactId>
+        </dependency>
+        <dependency>
+            <artifactId>spring-boot-starter-webflux</artifactId>
+            <groupId>org.springframework.boot</groupId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>
\ No newline at end of file
diff --git a/standardization/moher-api/server-adapters/spring-webflux/src/main/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/springwebflux/HealthController.java b/standardization/moher-api/server-adapters/spring-webflux/src/main/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/springwebflux/HealthController.java
new file mode 100644
index 00000000..1f9eb4b0
--- /dev/null
+++ b/standardization/moher-api/server-adapters/spring-webflux/src/main/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/springwebflux/HealthController.java
@@ -0,0 +1,72 @@
+/*
+ * ============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.springwebflux;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+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.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import reactor.core.publisher.Mono;
+
+@RestController
+@RequestMapping(value = "/health", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
+public class HealthController {
+    private final Gson gson;
+    private final HealthProvider healthProvider;
+
+    public static HealthController create(HealthProvider healthProvider) {
+        GsonBuilder gson = new GsonBuilder();
+        gson.registerTypeAdapterFactory(new GsonAdaptersHealth());
+        return new HealthController(gson.create(), healthProvider);
+    }
+
+    public HealthController(Gson gson, HealthProvider healthProvider) {
+        this.gson = gson;
+        this.healthProvider = healthProvider;
+    }
+
+    @GetMapping("/ready")
+    public Mono<ResponseEntity<String>> readinessCheck() {
+        return healthProvider.currentHealth()
+                .map(health -> responseStatusForHealth(health)
+                        .contentType(MediaType.APPLICATION_JSON_UTF8)
+                        .body(gson.toJson(health)));
+    }
+
+    @GetMapping("/alive")
+    public Mono<String> livenessCheck() {
+        return Mono.just(AliveMessage.ALIVE_MESSAGE_JSON);
+    }
+
+    private ResponseEntity.BodyBuilder responseStatusForHealth(Health health) {
+        return health.healthy()
+                ? ResponseEntity.ok()
+                : ResponseEntity.status(HttpStatus.SERVICE_UNAVAILABLE);
+    }
+}
diff --git a/standardization/moher-api/server-adapters/spring-webflux/src/main/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/springwebflux/MetricsController.java b/standardization/moher-api/server-adapters/spring-webflux/src/main/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/springwebflux/MetricsController.java
new file mode 100644
index 00000000..4ce4fd12
--- /dev/null
+++ b/standardization/moher-api/server-adapters/spring-webflux/src/main/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/springwebflux/MetricsController.java
@@ -0,0 +1,43 @@
+/*
+ * ============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.springwebflux;
+
+import org.onap.dcaegen2.services.sdk.standardization.moher.metrics.api.Metrics;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import reactor.core.publisher.Mono;
+
+@RestController
+@RequestMapping(value = "/metrics", produces = MediaType.TEXT_PLAIN_VALUE)
+public class MetricsController {
+    private final Metrics metrics;
+
+    public MetricsController(Metrics metrics) {
+        this.metrics = metrics;
+    }
+
+    @GetMapping
+    public Mono<String> prometheusMetrics() {
+        return metrics.collect();
+    }
+}
diff --git a/standardization/moher-api/server-adapters/spring-webflux/src/test/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/springwebflux/HealthControllerIT.java b/standardization/moher-api/server-adapters/spring-webflux/src/test/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/springwebflux/HealthControllerIT.java
new file mode 100644
index 00000000..236cc16f
--- /dev/null
+++ b/standardization/moher-api/server-adapters/spring-webflux/src/test/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/springwebflux/HealthControllerIT.java
@@ -0,0 +1,81 @@
+/*
+ * ============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.springwebflux;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.concurrent.atomic.AtomicReference;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+import org.junit.jupiter.api.Test;
+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.springframework.http.MediaType;
+import org.springframework.test.web.reactive.server.WebTestClient;
+
+import reactor.core.publisher.Mono;
+
+class HealthControllerIT {
+
+    private final AtomicReference<Health> currentHealth = new AtomicReference<>();
+    private final HealthProvider healthProvider = () -> Mono.fromCallable(currentHealth::get);
+    private final HealthController sut = HealthController.create(healthProvider);
+    private final WebTestClient client = WebTestClient.bindToController(sut).build();
+    private final Gson gsonForDeserialization = new GsonBuilder().registerTypeAdapterFactory(new GsonAdaptersHealth())
+            .create();
+
+    @Test
+    void readinessProbeShouldReturnOkWhenHealthy() {
+        final Health expectedHealth = Health.createHealthy("Ready to go");
+        currentHealth.set(expectedHealth);
+
+        client.get().uri("/health/ready").accept(MediaType.APPLICATION_JSON).exchange().expectStatus().isOk()
+                .expectBody(String.class).value(body -> {
+                    final Health actualHealth = gsonForDeserialization.fromJson(body, Health.class);
+                    assertThat(actualHealth).isEqualTo(expectedHealth);
+                });
+    }
+
+    @Test
+    void readinessProbeShouldReturnUnavailableWhenNotHealthy() {
+        final Health expectedHealth = Health.createUnhealthy("Waiting for CBS update");
+        currentHealth.set(expectedHealth);
+
+        client.get().uri("/health/ready").accept(MediaType.APPLICATION_JSON).exchange().expectStatus()
+                .is5xxServerError().expectBody(String.class).value(body -> {
+                    final Health actualHealth = gsonForDeserialization.fromJson(body, Health.class);
+                    assertThat(actualHealth).isEqualTo(expectedHealth);
+                });
+    }
+
+    @Test
+    void livenessProbeShouldAlwaysReturnOk() {
+        client.get().uri("/health/alive").accept(MediaType.APPLICATION_JSON).exchange().expectStatus().isOk()
+                .expectBody(String.class).value(body -> {
+                    assertThat(body).isEqualTo(AliveMessage.ALIVE_MESSAGE_JSON);
+                });
+    }
+
+}
diff --git a/standardization/moher-api/server-adapters/spring-webflux/src/test/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/springwebflux/MetricsControllerIT.java b/standardization/moher-api/server-adapters/spring-webflux/src/test/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/springwebflux/MetricsControllerIT.java
new file mode 100644
index 00000000..32d00449
--- /dev/null
+++ b/standardization/moher-api/server-adapters/spring-webflux/src/test/java/org/onap/dcaegen2/services/sdk/standardization/moher/adapters/springwebflux/MetricsControllerIT.java
@@ -0,0 +1,48 @@
+/*
+ * ============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.springwebflux;
+
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import io.micrometer.prometheus.PrometheusMeterRegistry;
+import org.junit.jupiter.api.Test;
+import org.onap.dcaegen2.services.sdk.standardization.moher.metrics.api.Metrics;
+import org.onap.dcaegen2.services.sdk.standardization.moher.metrics.api.MetricsFactory;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.reactive.server.WebTestClient;
+
+class MetricsControllerIT {
+
+    private final PrometheusMeterRegistry defaultRegistry = MetricsFactory.createDefaultRegistry();
+    private final Metrics metrics = MetricsFactory.createMetrics(defaultRegistry);
+    private final MetricsController sut = new MetricsController(metrics);
+    private final WebTestClient client = WebTestClient.bindToController(sut).build();
+
+    @Test
+    void prometheusMetrics() {
+        client.get().uri("/metrics").accept(MediaType.ALL).exchange()
+                .expectStatus().isOk()
+                .expectHeader().contentTypeCompatibleWith(MediaType.TEXT_PLAIN)
+                .expectBody(String.class)
+                .value(body -> assertThat(body).contains("system_cpu").contains("jvm_classes"));
+    }
+}
diff --git a/standardization/moher-api/server-adapters/spring/pom.xml b/standardization/moher-api/server-adapters/spring/pom.xml
deleted file mode 100644
index 52f1dad2..00000000
--- a/standardization/moher-api/server-adapters/spring/pom.xml
+++ /dev/null
@@ -1,35 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!--
-  ~ ============LICENSE_START=======================================================
-  ~ DCAEGEN2-SERVICES-SDK
-  ~ ================================================================================
-  ~ Copyright (C) 2019 Nokia
-  ~ ================================================================================
-  ~ 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=========================================================
-  -->
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-    <modelVersion>4.0.0</modelVersion>
-    <parent>
-        <artifactId>dcaegen2-sdk-moher-server-adapters</artifactId>
-        <groupId>org.onap.dcaegen2.services.sdk</groupId>
-        <version>1.2.0-SNAPSHOT</version>
-    </parent>
-
-    <name>Monitoring and Healthcheck :: Server Adapters :: Spring</name>
-    <description>MoHeR Spring server adapter</description>
-    <artifactId>dcae-sdk-moher-spring</artifactId>
-
-</project>
\ No newline at end of file