Initial Commit - 15052023

.gitignore

+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### 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/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/

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 "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*
+if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\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/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+
+FOR /F "usebackq 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%/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.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 "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
+if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\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%
+
+cmd /C 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>2.5.7</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>com.mongo.reactivie</groupId>
+	<artifactId>mongoreactive</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>mongoreactive</name>
+	<description>Demo project for Spring Boot</description>
+	<properties>
+		<java.version>11</java.version>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-mongodb-reactive</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-mongodb</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-webflux</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.kafka</groupId>
+			<artifactId>spring-kafka</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>io.projectreactor.kafka</groupId>
+			<artifactId>reactor-kafka</artifactId>
+			<version>1.3.5</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-collections4</artifactId>
+			<version>4.4</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<!-- https://mvnrepository.com/artifact/io.springfox/springfox-swagger-ui -->
+		<dependency>
+			<groupId>io.springfox</groupId>
+			<artifactId>springfox-swagger-ui</artifactId>
+			<version>2.9.2</version>
+		</dependency>
+		<!-- https://mvnrepository.com/artifact/io.springfox/springfox-swagger2 -->
+		<dependency>
+			<groupId>io.springfox</groupId>
+			<artifactId>springfox-swagger2</artifactId>
+			<version>2.9.2</version>
+		</dependency>
+
+		<dependency>
+			<groupId>io.projectreactor</groupId>
+			<artifactId>reactor-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

src/main/java/com/mongo/reactivie/MongoreactiveApplication.java

+package com.mongo.reactivie;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.reactive.config.EnableWebFlux;
+import springfox.documentation.builders.ApiInfoBuilder;
+import springfox.documentation.builders.PathSelectors;
+import springfox.documentation.builders.RequestHandlerSelectors;
+import springfox.documentation.service.ApiInfo;
+import springfox.documentation.spi.DocumentationType;
+import springfox.documentation.spring.web.plugins.Docket;
+
+@SpringBootApplication
+@EnableWebFlux
+public class MongoreactiveApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(MongoreactiveApplication.class, args);
+	}
+
+}

src/main/java/com/mongo/reactivie/config/KafkaConsumerConfig.java

+package com.mongo.reactivie.config;
+
+import com.mongo.reactivie.model.JobPost;
+import java.util.Collections;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.autoconfigure.kafka.KafkaProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.kafka.core.reactive.ReactiveKafkaConsumerTemplate;
+import reactor.kafka.receiver.ReceiverOptions;
+
+@Configuration
+public class KafkaConsumerConfig {
+
+    @Bean
+    public ReceiverOptions<String, JobPost> kafkaReceiverOptions(@Value(value = "${FAKE_CONSUMER_DTO_TOPIC}") String topic, KafkaProperties kafkaProperties) {
+        ReceiverOptions<String, JobPost> basicReceiverOptions = ReceiverOptions.create(kafkaProperties.buildConsumerProperties());
+        return basicReceiverOptions.subscription(Collections.singletonList(topic));
+    }
+
+    @Bean
+    public ReactiveKafkaConsumerTemplate<String, JobPost> reactiveKafkaConsumerTemplate(ReceiverOptions<String, JobPost> kafkaReceiverOptions) {
+        return new ReactiveKafkaConsumerTemplate<String, JobPost>(kafkaReceiverOptions);
+    }
+}

src/main/java/com/mongo/reactivie/config/KafkaProducerConfig.java

+package com.mongo.reactivie.config;
+
+
+import java.util.Map;
+import org.springframework.boot.autoconfigure.kafka.KafkaProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.kafka.core.reactive.ReactiveKafkaProducerTemplate;
+import reactor.kafka.sender.SenderOptions;
+
+@Configuration
+public class KafkaProducerConfig {
+
+    @Bean
+    public ReactiveKafkaProducerTemplate<String, String> reactiveKafkaProducerTemplate(
+            KafkaProperties kafkaProperties) {
+        Map<String, Object> props = kafkaProperties.buildProducerProperties();
+        return new ReactiveKafkaProducerTemplate<String, String>(SenderOptions.create(props));
+    }
+}

src/main/java/com/mongo/reactivie/consumer/ReactiveConsumerService.java

+package com.mongo.reactivie.consumer;
+
+import com.mongo.reactivie.model.JobPost;
+import org.apache.kafka.clients.consumer.ConsumerRecord;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.kafka.core.reactive.ReactiveKafkaConsumerTemplate;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Flux;
+
+@Service
+public class ReactiveConsumerService implements CommandLineRunner {
+
+    Logger log = LoggerFactory.getLogger(ReactiveConsumerService.class);
+
+    private final ReactiveKafkaConsumerTemplate<String, JobPost> reactiveKafkaConsumerTemplate;
+
+    public ReactiveConsumerService(ReactiveKafkaConsumerTemplate<String, JobPost> reactiveKafkaConsumerTemplate) {
+        this.reactiveKafkaConsumerTemplate = reactiveKafkaConsumerTemplate;
+    }
+
+    private Flux<JobPost> consumeJobPost() {
+        return reactiveKafkaConsumerTemplate
+                .receiveAutoAck()
+                .doOnNext(consumerRecord -> log.info("received key={}, value={} from topic={}, offset={}",
+                        consumerRecord.key(),
+                        consumerRecord.value(),
+                        consumerRecord.topic(),
+                        consumerRecord.offset())
+                )
+                .map(ConsumerRecord::value)
+                .doOnNext(jobPost -> log.info("successfully consumed {}={}", JobPost.class.getSimpleName(), jobPost))
+                .doOnError(throwable -> log.error("something bad happened while consuming : {}", throwable.getMessage()));
+    }
+
+    @Override
+    public void run(String... args) {
+        // we have to trigger consumption
+        consumeJobPost().subscribe();
+    }
+
+}

src/main/java/com/mongo/reactivie/controller/JobPostController.java

+package com.mongo.reactivie.controller;
+
+import com.mongo.reactivie.model.JobPost;
+import com.mongo.reactivie.model.JobPostCompanyDetails;
+import com.mongo.reactivie.service.JobService;
+import java.util.List;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.*;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+@RestController
+public class JobPostController {
+
+    @Autowired
+    private JobService jobService;
+
+    @GetMapping("/posts")
+    @ResponseStatus(HttpStatus.OK)
+    public Flux<JobPost> getAllPosts() {
+        return jobService.findAll();
+    }
+
+    @GetMapping("/posts/{id}")
+    @ResponseStatus(HttpStatus.OK)
+    public Mono<JobPost> getPostById(@PathVariable("id") String id) {
+        return jobService.findById(id);
+    }
+
+    @PostMapping("/posts")
+    @ResponseStatus(HttpStatus.CREATED)
+    public Mono<JobPost> createPost(@RequestBody JobPost jobPost) {
+        return jobService.save(jobPost);
+    }
+
+    @PostMapping("/posts/saveall")
+    @ResponseStatus(HttpStatus.CREATED)
+    public Flux<JobPost> saveAll(@RequestBody List<JobPost> jobPosts) {
+        return jobService.saveAll(jobPosts);
+    }
+
+    @PutMapping("/posts/{id}")
+    @ResponseStatus(HttpStatus.OK)
+    public Mono<JobPost> updatePost(@PathVariable("id") String id, @RequestBody JobPost jobPost) {
+        return jobService.update(id, jobPost);
+    }
+
+    @DeleteMapping("/posts/{id}")
+    @ResponseStatus(HttpStatus.NO_CONTENT)
+    public Mono<Void> deletePost(@PathVariable("id") String id) {
+        return jobService.deleteById(id);
+    }
+
+    @GetMapping("/publishMessage/{id}")
+    @ResponseStatus(HttpStatus.OK)
+    public Mono<String> publishMessage(@PathVariable("id") String id) {
+        return jobService.publishMessage(id);
+    }
+
+    @GetMapping("/posts/getJobPostCompanyDetails")
+    @ResponseStatus(HttpStatus.OK)
+    public Mono<List<JobPostCompanyDetails>> getJobPostCompanyDetails() {
+        return Mono.just(jobService.getJobPostCompanyDetails());
+    }
+
+}

src/main/java/com/mongo/reactivie/model/Company.java

+package com.mongo.reactivie.model;
+
+import org.springframework.data.annotation.Id;
+import org.springframework.data.mongodb.core.mapping.Document;
+
+@Document(collection = "Company")
+public class Company {
+
+    @Id
+    private String id;
+    private String companyName;
+    private String location;
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getCompanyName() {
+        return companyName;
+    }
+
+    public void setCompanyName(String companyName) {
+        this.companyName = companyName;
+    }
+
+    public String getLocation() {
+        return location;
+    }
+
+    public void setLocation(String location) {
+        this.location = location;
+    }
+}

src/main/java/com/mongo/reactivie/model/JobPost.java

+package com.mongo.reactivie.model;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonRootName;
+import java.util.List;
+import org.springframework.data.annotation.Id;
+import org.springframework.data.mongodb.core.mapping.Document;
+
+@Document(collection = "JobPost")
+public class JobPost {
+
+    @Id
+    private String id;
+    private String profile;
+    private String desc;
+    private Integer exp;
+    private List<String> techs;
+    private String companyId;
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getProfile() {
+        return profile;
+    }
+
+    public void setProfile(String profile) {
+        this.profile = profile;
+    }
+
+    public String getDesc() {
+        return desc;
+    }
+
+    public void setDesc(String desc) {
+        this.desc = desc;
+    }
+
+    public Integer getExp() {
+        return exp;
+    }
+
+    public void setExp(Integer exp) {
+        this.exp = exp;
+    }
+
+    public List<String> getTechs() {
+        return techs;
+    }
+
+    public void setTechs(List<String> techs) {
+        this.techs = techs;
+    }
+
+
+    public String getCompanyId() {
+        return companyId;
+    }
+
+    public void setCompanyId(String companyId) {
+        this.companyId = companyId;
+    }
+
+    @Override
+    public String toString() {
+        return "JobPost{" +
+                "id='" + id + '\'' +
+                ", profile='" + profile + '\'' +
+                ", desc='" + desc + '\'' +
+                ", exp=" + exp +
+                ", techs=" + techs +
+                '}';
+    }
+}

src/main/java/com/mongo/reactivie/model/JobPostCompanyDetails.java

+package com.mongo.reactivie.model;
+
+import java.util.List;
+
+public class JobPostCompanyDetails {
+
+    private String profile;
+    private String desc;
+    private Integer exp;
+    private List<String> techs;
+    private List<Company> companyDetails;
+
+    public String getProfile() {
+        return profile;
+    }
+
+    public void setProfile(String profile) {
+        this.profile = profile;
+    }
+
+    public String getDesc() {
+        return desc;
+    }
+
+    public void setDesc(String desc) {
+        this.desc = desc;
+    }
+
+    public Integer getExp() {
+        return exp;
+    }
+
+    public void setExp(Integer exp) {
+        this.exp = exp;
+    }
+
+    public List<String> getTechs() {
+        return techs;
+    }
+
+    public void setTechs(List<String> techs) {
+        this.techs = techs;
+    }
+
+    public List<Company> getCompanyDetails() {
+        return companyDetails;
+    }
+
+    public void setCompanyDetails(List<Company> companyDetails) {
+        this.companyDetails = companyDetails;
+    }
+}

src/main/java/com/mongo/reactivie/model/deserializer/JobPostDeserializer.java

+package com.mongo.reactivie.model.deserializer;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonMappingException;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.mongo.reactivie.model.JobPost;
+import java.util.Optional;
+import org.apache.kafka.common.header.Headers;
+import org.apache.kafka.common.serialization.Deserializer;
+import org.springframework.stereotype.Component;
+
+@Component
+public class JobPostDeserializer implements Deserializer<JobPost> {
+
+
+    @Override
+    public JobPost deserialize(String arg0, byte[] arg1) {
+        ObjectMapper mapper = new ObjectMapper();
+        JobPost jobPost = new JobPost();
+        try {
+            JsonNode orderNode = mapper.readTree(arg1);
+            if (Optional.ofNullable(orderNode).isPresent()) {
+                constructJobPost(jobPost, orderNode);
+            }
+        } catch (Exception e) {
+
+        }
+        return jobPost;
+    }
+
+    private void constructJobPost(JobPost jobPost, JsonNode jsonNode)
+            throws JsonMappingException, JsonProcessingException {
+        jobPost.setId(getTextValue(jsonNode, "id"));
+        jobPost.setDesc(getTextValue(jsonNode, "desc"));
+        jobPost.setExp((getIntValue(jsonNode, "exp")));
+        jobPost.setProfile(getTextValue(jsonNode, "profile"));
+
+    }
+
+    private String getTextValue(JsonNode jsonNode, String key) {
+        return Optional.ofNullable(jsonNode.get(key)).map(JsonNode::textValue).orElse(null);
+    }
+
+    private Integer getIntValue(JsonNode jsonNode, String key) {
+        return Optional.ofNullable(jsonNode.get(key)).map(JsonNode::intValue).orElse(null);
+    }
+
+    @Override
+    public JobPost deserialize(String arg0, Headers arg1, byte[] arg2) {
+        return this.deserialize(arg0, arg2);
+    }
+
+}

src/main/java/com/mongo/reactivie/repository/JobPostDAOImpl.java

+package com.mongo.reactivie.repository;
+
+import com.mongo.reactivie.model.JobPostCompanyDetails;
+import com.mongodb.client.AggregateIterable;
+import com.mongodb.client.MongoClient;
+import com.mongodb.client.MongoCollection;
+import com.mongodb.client.MongoDatabase;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import org.bson.Document;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.mongodb.core.convert.MongoConverter;
+import org.springframework.stereotype.Component;
+
+@Component
+public class JobPostDAOImpl {
+
+    @Autowired
+    private MongoClient mongoClient;
+
+    @Autowired
+    MongoConverter converter;
+
+    public List<JobPostCompanyDetails> getJobPostCompanyDetails() {
+
+        final List<JobPostCompanyDetails> posts = new ArrayList<>();
+        MongoDatabase database = mongoClient.getDatabase("Job");
+        MongoCollection<Document> collection = database.getCollection("JobPost");
+
+        AggregateIterable<Document> result = collection.aggregate(Arrays.asList(new Document("$lookup",
+                new Document("from", "Company")
+                        .append("localField", "companyId")
+                        .append("foreignField", "_id")
+                        .append("as", "companyDetails"))));
+        result.forEach(doc -> posts.add(converter.read(JobPostCompanyDetails.class,doc)));
+        return posts;
+    }
+}
\ No newline at end of file

src/main/java/com/mongo/reactivie/repository/JobPostRepository.java

+package com.mongo.reactivie.repository;
+
+import com.mongo.reactivie.model.JobPost;
+import org.springframework.data.mongodb.repository.ReactiveMongoRepository;
+import org.springframework.stereotype.Repository;
+
+
+@Repository
+public interface JobPostRepository extends ReactiveMongoRepository<JobPost, String> {
+
+}

src/main/java/com/mongo/reactivie/service/JobService.java

+package com.mongo.reactivie.service;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.mongo.reactivie.model.JobPost;
+import com.mongo.reactivie.model.JobPostCompanyDetails;
+import com.mongo.reactivie.repository.JobPostDAOImpl;
+import com.mongo.reactivie.repository.JobPostRepository;
+import java.util.List;
+import java.util.Optional;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+@Service
+public class JobService {
+
+    @Autowired
+    private JobPostRepository jobPostRepository;
+
+    @Autowired
+    private MessagePublishService messagePublishService;
+
+    @Autowired
+    private JobPostDAOImpl jobPostDAOImpl;
+
+    public Flux<JobPost> findAll() {
+        return jobPostRepository.findAll();
+    }
+
+    public Mono<JobPost> findById(String id) {
+        return jobPostRepository.findById(id);
+    }
+
+    public Mono<JobPost> save(JobPost jobPost) {
+        return jobPostRepository.save(jobPost);
+    }
+
+    public Flux<JobPost> saveAll(List<JobPost> jobPosts) {
+        return jobPostRepository.saveAll(jobPosts);
+    }
+
+    public Mono<JobPost> update(String id, JobPost jobPost) {
+        return jobPostRepository.findById(id).map(Optional::of).defaultIfEmpty(Optional.empty())
+                .flatMap(optionalJobPost -> {
+                    if (optionalJobPost.isPresent()) {
+                        jobPost.setId(id);
+                        return jobPostRepository.save(jobPost);
+                    }
+
+                    return Mono.empty();
+                });
+    }
+
+    public Mono<Void> deleteById(String id) {
+        return jobPostRepository.deleteById(id);
+    }
+
+
+    public Mono<String> publishMessage(String id) {
+        return jobPostRepository.findById(id)
+                .flatMap(post -> messagePublishService.publishMessage(convertToJson(post)));
+    }
+
+    public List<JobPostCompanyDetails> getJobPostCompanyDetails(){
+        return jobPostDAOImpl.getJobPostCompanyDetails();
+    }
+
+    private String convertToJson(JobPost posts) {
+        ObjectMapper mapper = new ObjectMapper();
+        String json = " ";
+        try {
+            json = mapper.writeValueAsString(posts);
+        } catch (JsonProcessingException e) {
+            e.printStackTrace();
+        }
+        return json;
+    }
+}

src/main/java/com/mongo/reactivie/service/MessagePublishService.java

+package com.mongo.reactivie.service;
+
+import java.util.Map;
+import org.apache.commons.collections4.map.HashedMap;
+import org.apache.kafka.clients.producer.ProducerRecord;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.kafka.core.KafkaTemplate;
+import org.springframework.kafka.core.reactive.ReactiveKafkaProducerTemplate;
+import org.springframework.kafka.support.SendResult;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Mono;
+
+@Service
+public class MessagePublishService {
+
+    private final ReactiveKafkaProducerTemplate<String, String> reactiveKafkaProducerTemplate;
+
+    public MessagePublishService(
+            ReactiveKafkaProducerTemplate<String, String> reactiveKafkaProducerTemplate) {
+        this.reactiveKafkaProducerTemplate = reactiveKafkaProducerTemplate;
+    }
+
+    public Mono<String> publishMessage(String jsonString) {
+        ProducerRecord<String, String> record = new ProducerRecord<>(
+                "TOPIC", jsonString);
+        Map<String, String> headers = new HashedMap<>();
+        headers.forEach((key, value) -> record.headers().add(key, value.getBytes()));
+        reactiveKafkaProducerTemplate.send(record).subscribe();
+        return Mono.just("Message published successfully");
+    }
+
+}

src/main/resources/application.properties

+spring.data.mongodb.uri=mongodb+srv://root:root@cluster0.sr2lgkq.mongodb.net/?retryWrites=true&w=majority
+spring.data.mongodb.database = Job
+
+spring.kafka.bootstrap-servers=localhost:9092
+
+# producer
+spring.kafka.producer.key-serializer=org.apache.kafka.common.serialization.StringSerializer
+spring.kafka.producer.value-serializer=org.apache.kafka.common.serialization.StringSerializer
+# consumer
+spring.kafka.consumer.group-id=reactivekafkaconsumerandproducer
+
+spring.kafka.consumer.auto-offset-reset=latest
+spring.kafka.consumer.key-deserializer=org.apache.kafka.common.serialization.StringDeserializer
+spring.kafka.consumer.value-deserializer=com.mongo.reactivie.model.deserializer.JobPostDeserializer
+# json deserializer config
+spring.kafka.properties.spring.json.trusted.packages=*
+spring.kafka.consumer.properties.spring.json.use.type.headers=false
+
+FAKE_CONSUMER_DTO_TOPIC=TOPIC
+
+
+

src/test/java/com/mongo/reactivie/MongoreactiveApplicationTests.java

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