Upload preferences

Issue-ID: PORTAL-1082

Signed-off-by: Fiete Ostkamp <Fiete.Ostkamp@telekom.de>
Change-Id: I265e0c8be481a279347aa653acc483c5017c996d

15 files changed, 751 insertions, 0 deletions

diff --git a/app/src/main/java/org/onap/portal/prefs/PortalPrefsApplication.java b/app/src/main/java/org/onap/portal/prefs/PortalPrefsApplication.java
new file mode 100644
index 0000000..092c533
--- /dev/null
+++ b/app/src/main/java/org/onap/portal/prefs/PortalPrefsApplication.java
@@ -0,0 +1,37 @@
+/*
+ *
+ * Copyright (c) 2022. Deutsche Telekom AG
+ *
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ *
+ */
+
+package org.onap.portal.prefs;
+
+import org.onap.portal.prefs.configuration.PortalPrefsConfig;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+
+@EnableConfigurationProperties(PortalPrefsConfig.class)
+@SpringBootApplication
+public class PortalPrefsApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(PortalPrefsApplication.class, args);
+	}
+
+}
diff --git a/app/src/main/java/org/onap/portal/prefs/configuration/BeansConfig.java b/app/src/main/java/org/onap/portal/prefs/configuration/BeansConfig.java
new file mode 100644
index 0000000..77ef7f0
--- /dev/null
+++ b/app/src/main/java/org/onap/portal/prefs/configuration/BeansConfig.java
@@ -0,0 +1,35 @@
+/*
+ *
+ * Copyright (c) 2022. Deutsche Telekom AG
+ *
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ *
+ */
+
+package org.onap.portal.prefs.configuration;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import java.time.Clock;
+
+@Configuration
+public class BeansConfig {
+  @Bean
+  Clock clock() {
+    return Clock.systemUTC();
+  }
+}
diff --git a/app/src/main/java/org/onap/portal/prefs/configuration/LogInterceptor.java b/app/src/main/java/org/onap/portal/prefs/configuration/LogInterceptor.java
new file mode 100644
index 0000000..b653fe3
--- /dev/null
+++ b/app/src/main/java/org/onap/portal/prefs/configuration/LogInterceptor.java
@@ -0,0 +1,59 @@
+/*
+ *
+ * Copyright (c) 2022. Deutsche Telekom AG
+ *
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ *
+ */
+
+package org.onap.portal.prefs.configuration;
+
+import org.onap.portal.prefs.util.Logger;
+import org.springframework.stereotype.Component;
+import org.springframework.web.filter.reactive.ServerWebExchangeContextFilter;
+import org.springframework.web.server.ServerWebExchange;
+import org.springframework.web.server.WebFilter;
+import org.springframework.web.server.WebFilterChain;
+import reactor.core.publisher.Mono;
+
+import java.util.List;
+
+@Component
+public class LogInterceptor implements WebFilter {
+  public static final String EXCHANGE_CONTEXT_ATTRIBUTE =
+      ServerWebExchangeContextFilter.class.getName() + ".EXCHANGE_CONTEXT";
+
+  public static final String X_REQUEST_ID = "X-Request-Id";
+
+  @Override
+  public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
+    List<String> xRequestIdList = exchange.getRequest().getHeaders().get(X_REQUEST_ID);
+    if (xRequestIdList != null && !xRequestIdList.isEmpty()) {
+      String xRequestId = xRequestIdList.get(0);
+      Logger.requestLog(
+          xRequestId, exchange.getRequest().getMethod(), exchange.getRequest().getURI());
+      exchange.getResponse().getHeaders().add(X_REQUEST_ID, xRequestId);
+      exchange.getResponse().beforeCommit(() -> {
+        Logger.responseLog(xRequestId,exchange.getResponse().getStatusCode());
+        return Mono.empty();
+      });
+    }
+
+    return chain
+        .filter(exchange)
+        .contextWrite(cxt -> cxt.put(EXCHANGE_CONTEXT_ATTRIBUTE, exchange));
+  }
+}
diff --git a/app/src/main/java/org/onap/portal/prefs/configuration/PortalPrefsConfig.java b/app/src/main/java/org/onap/portal/prefs/configuration/PortalPrefsConfig.java
new file mode 100644
index 0000000..3c03673
--- /dev/null
+++ b/app/src/main/java/org/onap/portal/prefs/configuration/PortalPrefsConfig.java
@@ -0,0 +1,39 @@
+/*
+ *
+ * Copyright (c) 2022. Deutsche Telekom AG
+ *
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ *
+ */
+
+package org.onap.portal.prefs.configuration;
+
+import javax.validation.constraints.NotBlank;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.context.properties.ConstructorBinding;
+
+import lombok.Data;
+
+@Data
+@ConstructorBinding
+@ConfigurationProperties("portal-prefs")
+public class PortalPrefsConfig {
+
+    @NotBlank
+    private final String realm;
+    
+}
diff --git a/app/src/main/java/org/onap/portal/prefs/configuration/SecurityConfig.java b/app/src/main/java/org/onap/portal/prefs/configuration/SecurityConfig.java
new file mode 100644
index 0000000..531e90b
--- /dev/null
+++ b/app/src/main/java/org/onap/portal/prefs/configuration/SecurityConfig.java
@@ -0,0 +1,53 @@
+/*
+ *
+ * Copyright (c) 2022. Deutsche Telekom AG
+ *
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ *
+ */
+
+package org.onap.portal.prefs.configuration;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.HttpMethod;
+import org.springframework.security.config.annotation.web.reactive.EnableWebFluxSecurity;
+import org.springframework.security.config.web.server.ServerHttpSecurity;
+import org.springframework.security.web.server.SecurityWebFilterChain;
+
+/**
+ * Configures the access control of the API endpoints.
+ */
+// https://hantsy.github.io/spring-reactive-sample/security/config.html
+@EnableWebFluxSecurity
+@Configuration
+public class SecurityConfig {
+
+  @Bean
+  public SecurityWebFilterChain springSecurityWebFilterChain(ServerHttpSecurity http) {
+    return http.httpBasic().disable()
+        .formLogin().disable()
+        .csrf().disable()
+        .cors()
+        .and()
+        .authorizeExchange()
+        .pathMatchers(HttpMethod.GET, "/actuator/**").permitAll()
+        .anyExchange().authenticated()
+        .and()
+        .oauth2ResourceServer(ServerHttpSecurity.OAuth2ResourceServerSpec::jwt)
+        .build();
+  }
+}
diff --git a/app/src/main/java/org/onap/portal/prefs/controller/PreferencesController.java b/app/src/main/java/org/onap/portal/prefs/controller/PreferencesController.java
new file mode 100644
index 0000000..584b3b4
--- /dev/null
+++ b/app/src/main/java/org/onap/portal/prefs/controller/PreferencesController.java
@@ -0,0 +1,88 @@
+/*
+ *
+ * Copyright (c) 2022. Deutsche Telekom AG
+ *
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ *
+ */
+
+package org.onap.portal.prefs.controller;
+
+
+import javax.validation.Valid;
+
+import org.onap.portal.prefs.exception.ProblemException;
+import org.onap.portal.prefs.openapi.api.PreferencesApi;
+import org.onap.portal.prefs.openapi.model.Preferences;
+import org.onap.portal.prefs.services.PreferencesService;
+import org.onap.portal.prefs.util.IdTokenExchange;
+import org.onap.portal.prefs.util.Logger;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.server.ServerWebExchange;
+
+import reactor.core.publisher.Mono;
+
+@RestController
+public class PreferencesController implements PreferencesApi {
+
+
+  private final PreferencesService preferencesService;
+
+  public PreferencesController(PreferencesService getPreferences){
+    this.preferencesService = getPreferences;
+  }
+
+  @Override
+  public Mono<ResponseEntity<Preferences>> getPreferences(String xRequestId, ServerWebExchange exchange) {
+    return IdTokenExchange
+      .extractUserId(exchange)
+      .flatMap(userid ->
+        preferencesService.getPreferences(userid)
+          .map(ResponseEntity::ok))
+          .onErrorResume(ProblemException.class, ex -> {
+              Logger.errorLog(xRequestId,"user preferences", null, "portal-prefs" );
+              return Mono.error(ex);
+          })
+      .onErrorReturn(new ResponseEntity<>(HttpStatus.BAD_REQUEST));
+
+  }
+
+  @Override
+  public Mono<ResponseEntity<Preferences>> savePreferences(String xRequestId, @Valid Mono<Preferences> preferences,
+                                                           ServerWebExchange exchange) {
+  return IdTokenExchange
+    .extractUserId(exchange)
+    .flatMap(userid ->
+      preferences
+        .flatMap( pref ->
+          preferencesService
+            .savePreferences(xRequestId, userid, pref)))
+            .map( ResponseEntity::ok)
+        .onErrorResume(ProblemException.class, ex -> {
+          Logger.errorLog(xRequestId,"user preferences", null, "portal-prefs" );
+          return Mono.error(ex);
+        })
+    .onErrorReturn(new ResponseEntity<>(HttpStatus.BAD_REQUEST));
+  }
+
+  @Override
+  public Mono<ResponseEntity<Preferences>> updatePreferences(String xRequestId, @Valid Mono<Preferences> preferences, ServerWebExchange exchange) {
+    return savePreferences(xRequestId, preferences, exchange);
+  }
+
+}
diff --git a/app/src/main/java/org/onap/portal/prefs/entities/PreferencesDto.java b/app/src/main/java/org/onap/portal/prefs/entities/PreferencesDto.java
new file mode 100644
index 0000000..45616a9
--- /dev/null
+++ b/app/src/main/java/org/onap/portal/prefs/entities/PreferencesDto.java
@@ -0,0 +1,39 @@
+/*
+ *
+ * Copyright (c) 2022. Deutsche Telekom AG
+ *
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ *
+ */
+
+package org.onap.portal.prefs.entities;
+
+import lombok.Getter;
+import lombok.Setter;
+import org.springframework.data.annotation.Id;
+import org.springframework.data.mongodb.core.mapping.Document;
+
+@Document
+@Getter
+@Setter
+public class PreferencesDto {
+  @Id
+  private String userId;
+
+  private Object properties;
+
+}
+
diff --git a/app/src/main/java/org/onap/portal/prefs/exception/ProblemException.java b/app/src/main/java/org/onap/portal/prefs/exception/ProblemException.java
new file mode 100644
index 0000000..b9d2a3d
--- /dev/null
+++ b/app/src/main/java/org/onap/portal/prefs/exception/ProblemException.java
@@ -0,0 +1,53 @@
+/*
+ *
+ * Copyright (c) 2022. Deutsche Telekom AG
+ *
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ *
+ */
+
+package org.onap.portal.prefs.exception;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.NoArgsConstructor;
+import org.zalando.problem.AbstractThrowableProblem;
+import org.zalando.problem.Problem;
+import org.zalando.problem.Status;
+import org.zalando.problem.StatusType;
+
+import java.net.URI;
+
+/** The default portal-prefs exception */
+@Data
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+@EqualsAndHashCode(callSuper = true)
+public class ProblemException extends AbstractThrowableProblem {
+  @Builder.Default private final URI type = Problem.DEFAULT_TYPE;
+
+  @Builder.Default private final String title = "Bad preferences error";
+
+  @Builder.Default private final StatusType status = Status.BAD_REQUEST;
+
+  @Builder.Default private final String detail = "Please add more details here";
+
+  @Builder.Default private final URI instance = null;
+
+}
diff --git a/app/src/main/java/org/onap/portal/prefs/repository/PreferencesRepository.java b/app/src/main/java/org/onap/portal/prefs/repository/PreferencesRepository.java
new file mode 100644
index 0000000..461ee1d
--- /dev/null
+++ b/app/src/main/java/org/onap/portal/prefs/repository/PreferencesRepository.java
@@ -0,0 +1,28 @@
+/*
+ *
+ * Copyright (c) 2022. Deutsche Telekom AG
+ *
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ *
+ */
+
+package org.onap.portal.prefs.repository;
+
+import org.onap.portal.prefs.entities.PreferencesDto;
+import org.springframework.data.mongodb.repository.ReactiveMongoRepository;
+
+public interface PreferencesRepository extends ReactiveMongoRepository<PreferencesDto, String> {
+}
diff --git a/app/src/main/java/org/onap/portal/prefs/services/PreferencesService.java b/app/src/main/java/org/onap/portal/prefs/services/PreferencesService.java
new file mode 100644
index 0000000..f96dfea
--- /dev/null
+++ b/app/src/main/java/org/onap/portal/prefs/services/PreferencesService.java
@@ -0,0 +1,80 @@
+/*
+ *
+ * Copyright (c) 2022. Deutsche Telekom AG
+ *
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ *
+ */
+
+package org.onap.portal.prefs.services;
+
+import org.onap.portal.prefs.entities.PreferencesDto;
+import org.onap.portal.prefs.exception.ProblemException;
+import org.onap.portal.prefs.openapi.model.Preferences;
+import org.onap.portal.prefs.repository.PreferencesRepository;
+import org.onap.portal.prefs.util.Logger;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import reactor.core.publisher.Mono;
+
+@Service
+public class PreferencesService {
+
+  @Autowired
+  private PreferencesRepository repository;
+
+  public Mono<Preferences> getPreferences(String userId){
+    return repository
+      .findById(userId)
+      .switchIfEmpty(defaultPreferences())
+      .map(this::toPreferences);
+  }
+
+  public Mono<Preferences> savePreferences( String xRequestId, String userId, Preferences preferences){
+
+    var preferencesDto = new PreferencesDto();
+    preferencesDto.setUserId(userId);
+    preferencesDto.setProperties(preferences.getProperties());
+
+    return repository
+      .save(preferencesDto)
+      .map(this::toPreferences)  
+      .onErrorResume(ProblemException.class, ex -> {
+        Logger.errorLog(xRequestId,"user prefrences", userId, "portal-prefs" );
+        return Mono.error(ex);
+      });
+
+  }
+
+  private Preferences toPreferences(PreferencesDto preferencesDto) {
+    var preferences = new Preferences();
+    preferences.setProperties(preferencesDto.getProperties());
+    return preferences; 
+  }
+
+  /**
+   * Get a Preferences object that is initialised with an empty string.
+   * This is a) for convenience to not handle 404 on the consuming side and
+   * b) for security reasons
+   * @return PreferencesDto
+   */
+  private Mono<PreferencesDto> defaultPreferences() {
+    var preferencesDto = new PreferencesDto();
+    preferencesDto.setProperties("");
+    return Mono.just(preferencesDto);
+  }
+}
diff --git a/app/src/main/java/org/onap/portal/prefs/util/IdTokenExchange.java b/app/src/main/java/org/onap/portal/prefs/util/IdTokenExchange.java
new file mode 100644
index 0000000..20f1581
--- /dev/null
+++ b/app/src/main/java/org/onap/portal/prefs/util/IdTokenExchange.java
@@ -0,0 +1,91 @@
+/*
+ *
+ * Copyright (c) 2022. Deutsche Telekom AG
+ *
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ *
+ */
+
+package org.onap.portal.prefs.util;
+
+import com.nimbusds.jwt.JWTParser;
+import io.vavr.control.Option;
+import io.vavr.control.Try;
+import org.springframework.web.server.ServerWebExchange;
+import org.zalando.problem.Problem;
+import org.zalando.problem.Status;
+import reactor.core.publisher.Mono;
+
+/**
+ * Represents a function that handles the <a href="https://jwt.io/introduction">JWT</a> identity token.
+ * Use this to check if the incoming requests are authorized to call the given endpoint
+ */
+
+public final class IdTokenExchange {
+
+  public static final String X_AUTH_IDENTITY_HEADER = "X-Auth-Identity";
+  public static final String JWT_CLAIM_USERID = "sub";
+
+  private IdTokenExchange(){
+
+  }
+
+  /**
+   * Extract the identity header from the given {@link ServerWebExchange}.
+   * @param exchange the ServerWebExchange that contains information about the incoming request
+   * @return the identity header in the form of <code>Bearer {@literal <Token>}<c/ode>
+   */
+  private static Mono<String> extractIdentityHeader(ServerWebExchange exchange) {
+    return io.vavr.collection.List.ofAll(
+            exchange.getRequest().getHeaders().getOrEmpty(X_AUTH_IDENTITY_HEADER))
+        .headOption()
+        .map(Mono::just)
+        .getOrElse(Mono.error(Problem.valueOf(Status.FORBIDDEN, "ID token is missing")));
+  }
+
+    /**
+   * Extract the identity token from the given {@link ServerWebExchange}.
+   * @see <a href="https://openid.net/specs/openid-connect-core-1_0.html#IDToken">OpenId Connect ID Token</a>
+   * @param exchange the ServerWebExchange that contains information about the incoming request
+   * @return the identity token that contains user roles
+   */
+  private static Mono<String> extractIdToken(ServerWebExchange exchange) {
+    return extractIdentityHeader(exchange)
+        .map(identityHeader -> identityHeader.replace("Bearer ", ""));
+  }
+
+  /**
+   * Extract the <code>userId</code> from the given {@link ServerWebExchange}
+   * @param exchange the ServerWebExchange that contains information about the incoming request
+   * @return the id of the user
+   */
+  public static Mono<String> extractUserId(ServerWebExchange exchange) {
+     return extractIdToken(exchange)
+         .flatMap(
+             idToken ->
+                 Try.of(() -> JWTParser.parse(idToken))
+                     .mapTry(jwt -> Option.of(jwt.getJWTClaimsSet()))
+                     .map(
+                         optionJwtClaimSet ->
+                             optionJwtClaimSet
+                                 .flatMap(
+                                     jwtClaimSet ->
+                                         Option.of(jwtClaimSet.getClaim(JWT_CLAIM_USERID)))
+                                 .map(String.class::cast)
+                     .map( Mono::just).get())
+                     .getOrElseGet(Mono::error));
+  }
+}
diff --git a/app/src/main/java/org/onap/portal/prefs/util/Logger.java b/app/src/main/java/org/onap/portal/prefs/util/Logger.java
new file mode 100644
index 0000000..4f4ac6c
--- /dev/null
+++ b/app/src/main/java/org/onap/portal/prefs/util/Logger.java
@@ -0,0 +1,58 @@
+/*
+ *
+ * Copyright (c) 2022. Deutsche Telekom AG
+ *
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ *
+ */
+
+package org.onap.portal.prefs.util;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.HttpStatus;
+
+import java.net.URI;
+
+@Slf4j
+public class Logger {
+
+  private Logger(){}
+
+  public static void requestLog(String xRequestId, HttpMethod methode, URI path) {
+    log.info("Portal-prefs - request - X-Request-Id {} {} {}", xRequestId, methode, path);
+  }
+
+  public static void responseLog(String xRequestId, HttpStatus code) {
+    log.info("Portal-prefs - response - X-Request-Id {} {}", xRequestId, code);
+  }
+
+  public static void errorLog(String xRequestId, String msg, String id, String app) {
+    log.info(
+        "Portal-prefs - error - X-Request-Id {} {} {} not found in {}", xRequestId, msg, id, app);
+  }
+
+  public static void errorLog(
+      String xRequestId, String msg, String id, String app, String errorDetails) {
+    log.info(
+        "Portal-prefs - error - X-Request-Id {} {} {} not found in {} error message: {}",
+        xRequestId,
+        msg,
+        id,
+        app,
+        errorDetails);
+  }
+}
diff --git a/app/src/main/resources/application-local.yml b/app/src/main/resources/application-local.yml
new file mode 100644
index 0000000..71fe8db
--- /dev/null
+++ b/app/src/main/resources/application-local.yml
@@ -0,0 +1,39 @@
+server:
+    port: 9001
+    address: 0.0.0.0
+
+spring:
+  jackson:
+    serialization:
+      # needed for serializing objects of type object
+      FAIL_ON_EMPTY_BEANS: false
+  security:
+    oauth2:
+      resourceserver:
+        jwt:
+          jwk-set-uri: http://localhost:8080/auth/realms/ONAP/protocol/openid-connect/certs #Keycloak Endpoint
+  data:
+    mongodb:
+      database: portal_prefs
+      host: localhost
+      port: 27017
+      username: root
+      password: password
+
+portal-prefs:
+    realm: ONAP
+
+management:
+  endpoints:
+    web:
+      exposure:
+        include: "*"
+  info:
+    build:
+      enabled: true
+    env:
+      enabled: true
+    git:
+      enabled: true
+    java:
+      enabled: true
diff --git a/app/src/main/resources/application.yml b/app/src/main/resources/application.yml
new file mode 100644
index 0000000..eb5b313
--- /dev/null
+++ b/app/src/main/resources/application.yml
@@ -0,0 +1,39 @@
+server:
+    port: 9001
+    address: 0.0.0.0
+
+spring:
+  jackson:
+    serialization:
+      # needed for serializing objects of type object
+      FAIL_ON_EMPTY_BEANS: false
+  security:
+    oauth2:
+      resourceserver:
+        jwt:
+          jwk-set-uri: ${KEYCLOAK_URL}/auth/realms/${KEYCLOAK_REALM}/protocol/openid-connect/certs #Keycloak Endpoint
+  data:
+    mongodb:
+      database: ${PORTALPREFS_DATABASE}
+      host: ${PORTALPREFS_HOST}
+      port: ${PORTALPREFS_PORT}
+      username: ${PORTALPREFS_USERNAME}
+      password: ${PORTALPREFS_PASSWORD}
+
+portal-prefs:
+    realm: ${KEYCLOAK_REALM}
+
+management:
+  endpoints:
+    web:
+      exposure:
+        include: "*"
+  info:
+    build:
+      enabled: true
+    env:
+      enabled: true
+    git:
+      enabled: true
+    java:
+      enabled: true
diff --git a/app/src/main/resources/logback-spring.xml b/app/src/main/resources/logback-spring.xml
new file mode 100644
index 0000000..05503bc
--- /dev/null
+++ b/app/src/main/resources/logback-spring.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true">
+    <appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
+        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
+            <level>${LOGBACK_LEVEL:-info}</level>
+        </filter>
+        <encoder class="net.logstash.logback.encoder.LogstashEncoder"/>
+    </appender>
+
+    <root level="all">
+        <appender-ref ref="stdout"/>
+    </root>
+</configuration>