.

.gitignore

+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**
+!**/src/test/**
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+
+### VS Code ###
+.vscode/

.mvn/wrapper/MavenWrapperDownloader.java

+/*
+ * Copyright 2007-present the original author or authors.
+ *
+ * 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
+ *
+ *      https://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.
+ */
+
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.6";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+            + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if (mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if (mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if (!outputFile.getParentFile().exists()) {
+            if (!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

.mvn/wrapper/maven-wrapper.properties

+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

Dockerfile

+FROM openjdk:8-jdk-alpine as build
+WORKDIR /workspace/app
+ENV SERVER_PORT 8080
+ENV ENABLE_RATINGS false
+ENV STAR_COLOR black
+
+
+COPY mvnw .
+COPY .mvn .mvn
+COPY pom.xml .
+COPY src src
+
+RUN ./mvnw install -DskipTests
+RUN mkdir -p target/dependency && (cd target/dependency; jar -xf ../*.jar)
+
+FROM openjdk:8-jdk-alpine
+VOLUME /tmp
+ARG DEPENDENCY=/workspace/app/target/dependency
+COPY --from=build ${DEPENDENCY}/BOOT-INF/lib /app/lib
+COPY --from=build ${DEPENDENCY}/META-INF /app/META-INF
+COPY --from=build ${DEPENDENCY}/BOOT-INF/classes /app
+EXPOSE ${SERVER_PORT}
+ENTRYPOINT ["java","-cp","app:app/lib/*","com.bookinfo.ProductpageApplication"]

mvnw.cmd

+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
+if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+
+FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
+if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%" == "on" pause
+
+if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
+
+exit /B %ERROR_CODE%

pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.2.4.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+    <groupId>com.bookinfo</groupId>
+    <artifactId>productpage</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>productpage</name>
+    <description>productpage</description>
+
+    <properties>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.session</groupId>
+            <artifactId>spring-session-jdbc</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jdbc</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.session</groupId>
+            <artifactId>spring-session-core</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.webjars</groupId>
+            <artifactId>bootstrap</artifactId>
+            <version>3.3.7</version>
+        </dependency>
+        <dependency>
+            <groupId>org.webjars</groupId>
+            <artifactId>jquery</artifactId>
+            <version>3.2.1</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.junit.vintage</groupId>
+                    <artifactId>junit-vintage-engine</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

script.sh

+#!/bin/bash
+sudo docker build --no-cache -t beopenit/productpage:v1 .
+sudo docker push beopenit/productpage:v1

src/main/java/com/bookinfo/ProductpageApplication.java

+package com.bookinfo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.web.client.RestTemplate;
+
+import java.time.Duration;
+
+@SpringBootApplication
+public class ProductpageApplication {
+    @Bean
+    public RestTemplate restTemplate(RestTemplateBuilder builder) {
+        return builder
+                .setConnectTimeout(Duration.ofSeconds(3000))
+                .setReadTimeout(Duration.ofSeconds(3000))
+                .build();
+    }
+    public static void main(String[] args) {
+        SpringApplication.run(ProductpageApplication.class, args);
+    }
+}

src/main/java/com/bookinfo/client/DetailsClient.java

+package com.bookinfo.client;
+
+public interface DetailsClient {
+    Object getDetail(int idProduct);
+}

src/main/java/com/bookinfo/client/RatingsClient.java

+package com.bookinfo.client;
+
+
+public interface RatingsClient {
+    Object getRatings(int idProduct);
+}

src/main/java/com/bookinfo/client/ReviewsClient.java

+package com.bookinfo.client;
+
+import java.util.List;
+
+public interface ReviewsClient {
+    List<Object> getReviews(int idProduct);
+}

src/main/java/com/bookinfo/client/impl/DetailsClientImpl.java

+package com.bookinfo.client.impl;
+
+import com.bookinfo.client.DetailsClient;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Service;
+import org.springframework.web.client.RestClientException;
+import org.springframework.web.client.RestTemplate;
+
+@Service
+public class DetailsClientImpl implements DetailsClient {
+    @Autowired
+    private RestTemplate restTemplate;
+    @Value("${detailsHostname}")
+    private String detailsHostname;
+
+    @Override
+    public Object getDetail(int idProduct) throws RestClientException {
+        ResponseEntity<Object> responseEntity = restTemplate.getForEntity(detailsHostname + "/details/" +idProduct, Object.class);
+        return responseEntity.getBody();
+    }
+}

src/main/java/com/bookinfo/client/impl/RatingsClientImpl.java

+package com.bookinfo.client.impl;
+
+import com.bookinfo.client.RatingsClient;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+import org.springframework.web.client.RestTemplate;
+
+@Service
+public class RatingsClientImpl implements RatingsClient {
+    @Autowired
+    private RestTemplate restTemplate;
+    @Value("${ratingsHostname}")
+    private String ratingsHostname;
+
+    @Override
+    public Object getRatings(int idProduct) {
+        return null;
+    }
+}

src/main/java/com/bookinfo/client/impl/ReviewsClientImpl.java

+package com.bookinfo.client.impl;
+
+import com.bookinfo.client.ReviewsClient;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Service;
+import org.springframework.web.client.RestClientException;
+import org.springframework.web.client.RestTemplate;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+@Service
+public class ReviewsClientImpl implements ReviewsClient {
+    @Autowired
+    private RestTemplate restTemplate;
+    @Value("${reviewsHostname}")
+    private String reviewsHostname;
+
+    @Override
+    public List<Object> getReviews(int idProduct) throws RestClientException {
+        ResponseEntity<Object[]> responseEntity = restTemplate.getForEntity(reviewsHostname + "/reviews/" + idProduct, Object[].class);
+        Object[] reviews = responseEntity.getBody();
+        return (reviews !=null)? Arrays.asList(reviews):new ArrayList<>();
+    }
+}

src/main/java/com/bookinfo/entity/Product.java

+package com.bookinfo.entity;
+
+import lombok.Builder;
+import lombok.Getter;
+
+@Builder
+@Getter
+public class Product {
+    private int id;
+    private String title;
+    private String descriptionHtml;
+}

src/main/java/com/bookinfo/rest/ProductPageController.java

+package com.bookinfo.rest;
+
+import com.bookinfo.client.DetailsClient;
+import com.bookinfo.client.RatingsClient;
+import com.bookinfo.client.ReviewsClient;
+import com.bookinfo.entity.Product;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.client.HttpClientErrorException;
+import org.springframework.web.client.RestClientException;
+
+import javax.servlet.http.HttpServletRequest;
+import java.util.ArrayList;
+import java.util.List;
+
+@Controller
+public class ProductPageController {
+    @Autowired
+    private DetailsClient detailsClient;
+    @Autowired
+    private ReviewsClient reviewsClient;
+    @Autowired
+    private RatingsClient ratingsClient;
+
+    @GetMapping("/")
+    public String getIndex(Model model) {
+        model.addAttribute("name", "hello world");
+        return "index";
+    }
+    @GetMapping("/health")
+    public String health(){
+        return "Product page is healthy";
+    }
+
+    @PostMapping("/login")
+    public String login(@RequestParam(name = "username", required = true) String username,
+                        HttpServletRequest request){
+        String user = username;
+        request.getSession().setAttribute("user", user);
+        return "redirect:/productpage";
+    }
+    @GetMapping("/logout")
+    public String destroySession(HttpServletRequest request) {
+        request.getSession().invalidate();
+        return "redirect:/productpage";
+    }
+
+    @GetMapping("/productpage")
+    public String front(HttpServletRequest request, Model model) {
+        Product product = getProducts().get(0);
+        model.addAttribute("product", product);
+        String user = (request.getSession() == null)? "" : (String) request.getSession().getAttribute("user");
+        model.addAttribute("user", user);
+        getDetails(product.getId(), model);
+        getReviews(product.getId(), model);
+        return "productpage";
+    }
+    @RequestMapping(value = "/api/v1/products", produces = MediaType.APPLICATION_JSON_VALUE)
+    @ResponseBody
+    public List<Product> getAllProducts(){
+        return getProducts();
+    }
+    @RequestMapping(value = "/api/v1/products/{idProduct}", produces = MediaType.APPLICATION_JSON_VALUE)
+    @ResponseBody
+    public Object getProduct(@PathVariable int idProduct){
+        return detailsClient.getDetail(idProduct);
+    }
+    @RequestMapping(value = "/api/v1/products/{idProduct}/reviews", produces = MediaType.APPLICATION_JSON_VALUE)
+    @ResponseBody
+    public Object getReviews(@PathVariable int idProduct){
+        return reviewsClient.getReviews(idProduct);
+    }
+    @RequestMapping(value = "/api/v1/products/{idProduct}/ratings", produces = MediaType.APPLICATION_JSON_VALUE)
+    @ResponseBody
+    public Object getRations(@PathVariable int idProduct){
+        return ratingsClient.getRatings(idProduct);
+    }
+    private List<Product> getProducts(){
+        Product product = Product.builder()
+                .id(1)
+                .title("The Comedy of Errors")
+                .descriptionHtml("")
+                .build();
+        List<Product> products = new ArrayList<>();
+        products.add(product);
+        return products;
+    }
+
+    private void getDetails(int idProduct, Model model) {
+        try {
+            model.addAttribute("details", detailsClient.getDetail(idProduct));
+            model.addAttribute("detailsStatus", 200);
+        }
+        catch (RestClientException ex){
+            if(ex instanceof HttpClientErrorException){
+                model.addAttribute("detailsStatus", ((HttpClientErrorException) ex).getStatusCode());
+            }
+            else {
+                model.addAttribute("detailsStatus", 500);
+            }
+            model.addAttribute("detailserror", "Sorry, product details are currently unavailable for this book.");
+        }
+    }
+    private void getReviews(int idProduct, Model model) {
+        try {
+            model.addAttribute("reviews", reviewsClient.getReviews(idProduct));
+            model.addAttribute("reviewsStatus", 200);
+
+        }
+        catch (RestClientException ex){
+            System.out.println(ex);
+            if(ex instanceof HttpClientErrorException){
+                model.addAttribute("reviewsStatus", ((HttpClientErrorException) ex).getStatusCode());
+            }
+            else {
+                model.addAttribute("reviewsStatus", 500);
+            }
+            model.addAttribute("reviewserror", "Sorry, product reviews are currently unavailable for this book.");
+        }
+    }
+}

src/main/resources/application.yml

+server:
+  port: ${SERVER_PORT:8080}    #default port where the service will be started
+spring:
+  application:
+    name: productpage   #current service name to be used by the eureka server
+  session:
+    store-type: jdbc
+    # Database schema initialization mode.
+    jdbc:
+      initialize-schema: always
+      # Path to the SQL file to use to initialize the database schema.
+      schema: classpath:org/springframework/session/jdbc/schema-@@platform@@.sql
+      # Name of the database table used to store sessions.
+      table-name: TESTDB.SPRING_SESSION
+  h2:
+    console:
+      enabled: true
+      path: /h2-console
+  datasource:
+    url: jdbc:h2:mem:TESTDB
+    driverClassName: org.h2.Driver
+    username: sa
+    password:
+    schema: classpath:schema.sql
+    platform: h2
+  jpa:
+    show-sql: true
+    hibernate:
+      ddl-auto: create
+    database-platform:
+      org:
+        hibernate:
+          dialect: H2Dialect
+
+
+detailsHostname: ${DETAILS_HOST:#{'http://localhost:8084'}}
+ratingsHostname: ${RATINGS_HOST:#{'http://localhost:8085'}}
+reviewsHostname: ${REVIEWS_HOST:#{'http://localhost:8081'}}

src/main/resources/schema.sql

+CREATE SCHEMA IF NOT EXISTS TESTDB;
+SET SCHEMA TESTDB;
+drop table if exists TESTDB.SPRING_SESSION_ATTRIBUTES;
+drop table if exists TESTDB.SPRING_SESSION;
+CREATE TABLE TESTDB.SPRING_SESSION (
+PRIMARY_ID CHAR(36) NOT NULL,
+SESSION_ID CHAR(36) NOT NULL,
+CREATION_TIME BIGINT NOT NULL,
+LAST_ACCESS_TIME BIGINT NOT NULL,
+MAX_INACTIVE_INTERVAL INT NOT NULL,
+EXPIRY_TIME BIGINT NOT NULL,
+PRINCIPAL_NAME VARCHAR(100),
+CONSTRAINT SPRING_SESSION_PK PRIMARY KEY (PRIMARY_ID)
+);
+CREATE UNIQUE INDEX SPRING_SESSION_IX1 ON TESTDB.SPRING_SESSION (SESSION_ID);
+CREATE INDEX SPRING_SESSION_IX2 ON TESTDB.SPRING_SESSION (EXPIRY_TIME);
+CREATE INDEX SPRING_SESSION_IX3 ON TESTDB.SPRING_SESSION (PRINCIPAL_NAME);
+CREATE TABLE TESTDB.SPRING_SESSION_ATTRIBUTES (
+SESSION_PRIMARY_ID CHAR(36) NOT NULL,
+ATTRIBUTE_NAME VARCHAR(200) NOT NULL,
+ATTRIBUTE_BYTES BLOB NOT NULL,
+CONSTRAINT SPRING_SESSION_ATTRIBUTES_PK PRIMARY KEY (SESSION_PRIMARY_ID, ATTRIBUTE_NAME),
+CONSTRAINT SPRING_SESSION_ATTRIBUTES_FK FOREIGN KEY (SESSION_PRIMARY_ID) REFERENCES TESTDB.SPRING_SESSION(PRIMARY_ID) ON DELETE CASCADE
+);

src/main/resources/templates/index.html

+<!DOCTYPE HTML>
+<html xmlns:th="http://www.thymeleaf.org">
+<head>
+    <title>Getting Started: Serving Web Content</title>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+</head>
+<body>
+    <p th:text="'Hello, ' + ${name} + '!'" />
+</body>
+</html>

src/main/resources/templates/productpage.html

+<!DOCTYPE HTML>
+<html xmlns:th="http://www.thymeleaf.org">
+<head>
+    <title>Getting Started: Serving Web Content</title>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+    <link rel="stylesheet" type="text/css" th:href="@{/webjars/bootstrap/3.3.7/css/bootstrap.min.css}"/>
+</head>
+<body>
+    <nav class="navbar navbar-inverse navbar-static-top">
+        <div class="container">
+            <div class="navbar-header">
+                <a class="navbar-brand" href="#">BookInfo Sample</a>
+            </div>
+            <div th:switch="${user}">
+                <button th:case="null" type="button" class="btn btn-default navbar-btn navbar-right" data-toggle="modal" href="#login-modal">Sign
+                    in</button>
+
+                <p class="navbar-text navbar-right" th:case="${user}">
+                    <i class="glyphicon glyphicon-user" aria-hidden="false"></i>
+                    <span style="padding-left: 5px;" ><span th:text="${user}"></span> ( <a href="logout">sign out</a> )</span>
+                </p>
+
+            </div>
+        </div>
+    </nav>
+    <div id="login-modal" class="modal fade" role="dialog">
+        <div class="modal-dialog">
+            <div class="modal-content">
+                <div class="modal-header">
+                    <button type="button" class="close" data-dismiss="modal">&times;</button>
+                    <h4 class="modal-title">Please sign in</h4>
+                </div>
+                <div class="modal-body">
+                    <form method="post" action='login' name="login_form">
+                        <p><input type="text" class="form-control" name="username" id="username" placeholder="User Name"></p>
+                        <p><input type="password" class="form-control" name="passwd" placeholder="Password"></p>
+                        <p>
+                            <button type="submit" class="btn btn-primary">Sign in</button>
+                            <button type="button" class="btn btn-default" data-dismiss="modal">Cancel</button>
+                        </p>
+                    </form>
+                </div>
+            </div>
+
+        </div>
+    </div>
+    <div class="container-fluid">
+        <div class="row">
+            <div class="col-md-12" th:if="${product} != null">
+                <h3 class="text-center text-primary" th:text="${product.getTitle()}"></h3>
+                <p>Summary: <span th:text="${product.getTitle()}"></span></p>
+            </div>
+        </div>
+
+        <div class="row">
+            <div class="col-md-6">
+                <div th:if="${detailsStatus} == 200">
+                    <h4 class="text-center text-primary">Book Details</h4>
+                    <dl>
+                        <dt>Type: <span th:text="${details.type}"></span></dt>
+                        <dt>Pages:<span th:text="${details.pages}"></span></dt>
+                        <dt>Publisher: <span th:text="${details.publisher}"></span></dt>
+                        <dt>Language:<span th:text="${details.language}"></span></dt>
+                        <dt>ISBN-10: <span th:text="${details['isbn_10']}"></span></dt>
+                        <dt>ISBN-13: <span th:text="${details['isbn_13']}"></span></dt>
+                    </dl>
+                </div>
+                <div th:if="${detailsStatus} != 200">
+                    <h4 class="text-center text-primary">Error fetching product details!</h4>
+                    <p th:text="${detailserror}"></p>
+                </div>
+            </div>
+            <div class="col-md-6">
+                <div th:if="${reviewsStatus} == 200">
+                    <h4 class="text-center text-primary">Book Reviews</h4>
+                    <blockquote th:each="review: ${reviews}">
+                        <p th:text="${review.text}"></p>
+                        <small th:text="${review.reviewer}"></small>
+                        <div th:if="${review.rating != null}">
+                            <div th:if="${review.rating['stars']!= null } " >
+                                <div th:style="'color:'+${review.color}">
+                                    <!-- full stars: -->
+                                    <span th:each="star: ${#numbers.sequence(1, review.rating.stars)}" class="glyphicon glyphicon-star"></span>
+                                    <!-- empty stars: -->
+                                    <span th:each="star: ${#numbers.sequence(1, 5-review.rating.stars)}" class="glyphicon glyphicon-star-empty"></span>
+                                </div>
+                            </div>
+                            <p th:if="${review.rating['error'] != null }"><i th:text="${review.rating.error}"></i></p>
+                        </div>
+                    </blockquote>
+                </div>
+                <p th:if="${reviewsStatus} != 200"><span th:text="${reviewserror}"></span></p>
+            </div>
+
+
+        </div>
+    </div>
+    <script type="text/javascript" th:src="@{/webjars/jquery/3.2.1/jquery.min.js/}"></script>
+    <script type="text/javascript" th:src="@{/webjars/bootstrap/3.3.7/js/bootstrap.min.js}"></script>
+</body>
+</html>

src/test/java/com/bookinfo/ProductpageApplicationTests.java

+package com.bookinfo;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class ProductpageApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}