{"id":1927,"date":"2019-06-07T12:00:00","date_gmt":"2019-06-07T10:00:00","guid":{"rendered":"https:\/\/kindsonthegenius.com\/blog\/how-to-build-microservices-in-java-using-spring-eureka-source-codes\/"},"modified":"2026-07-05T03:23:41","modified_gmt":"2026-07-05T01:23:41","slug":"how-to-build-microservices-in-java-using-spring-eureka-source-codes","status":"publish","type":"post","link":"https:\/\/kindsonthegenius.com\/blog\/how-to-build-microservices-in-java-using-spring-eureka-source-codes\/","title":{"rendered":"How to Build Microservices in Java using Spring, Eureka (Source Codes)"},"content":{"rendered":"

Find the Step by Step Procedure here<\/a><\/p>\n

Final AdmissionsResource File<\/h5>\n
@RestController<\/span>\n@RequestMapping<\/span>(<\/span>\"\/admissions\"<\/span>)<\/span>\npublic<\/span> class<\/span> AdmissionsResource<\/span> {<\/span>\n\t\n\t@Autowired<\/span>\n\tprivate<\/span> RestTemplate restTemplate;<\/span>\n\t\n\t\/\/A hardcoded list of patients<\/span>\n\tList<<\/span>Patient><\/span> patients =<\/span> Arrays.<\/span>asList<\/span>(<\/span>\t\t\t\t\n\t\tnew<\/span> Patient<\/span>(<\/span>\"P1\"<\/span>,<\/span> \"Joseph\"<\/span>,<\/span> \"Nigerian\"<\/span>),<\/span>\n\t\tnew<\/span> Patient<\/span>(<\/span>\"P2\"<\/span>,<\/span> \"Gabor\"<\/span>,<\/span> \"Hungarian\"<\/span>)<\/span>\n\t\t);<\/span>\n\t\n\t\/\/getPatients() returns a list of patients<\/span>\n\t@RequestMapping<\/span>(<\/span>\"\/patients\"<\/span>)<\/span>\n\tpublic<\/span> List<<\/span>Patient><\/span> getPatients<\/span>()<\/span> {<\/span>\n\t\treturn<\/span> patients;<\/span>\n\t}<\/span>\n\t\n\t\/\/getPatientById() returns a patient with a given Id<\/span>\n\t@RequestMapping<\/span>(<\/span>\"\/patients\/{Id}\"<\/span>)<\/span>\n\tpublic<\/span> Patient getPatientById<\/span>(<\/span>@PathVariable<\/span>(<\/span>\"Id\"<\/span>)<\/span> String Id)<\/span> {<\/span>\n\t\tPatient p =<\/span> patients.<\/span>stream<\/span>()<\/span>\n\t\t\t\t.<\/span>filter<\/span>(<\/span>patient -><\/span> Id.<\/span>equals<\/span>(<\/span>patient.<\/span>getId<\/span>()))<\/span>\n\t\t\t\t.<\/span>findAny<\/span>()<\/span>\n\t\t\t\t.<\/span>orElse<\/span>(<\/span>null<\/span>);<\/span>\n\t\treturn<\/span> p;<\/span>\n\t}<\/span>\n\t\n\t\/\/getPhysicians calls the hr-service microservice to get list of physicians<\/span>\n\t@RequestMapping<\/span>(<\/span>\"\/physicians\"<\/span>)<\/span>\n\tpublic<\/span> EmployeesList getPhysicians<\/span>()<\/span> {<\/span>\n\t\tEmployeesList physicians =<\/span> \n\t\t\t\trestTemplate.<\/span>getForObject<\/span>(<\/span>\"http:\/\/hr-service\/hr\/employees\"<\/span>,<\/span> EmployeesList.<\/span>class<\/span>);<\/span>\n\t\treturn<\/span> physicians;<\/span>\n\t}<\/span>\n\t\n\t\/\/getDiseases calls the pathology-service to get list of diseases<\/span>\n\t@RequestMapping<\/span>(<\/span>\"\/diseases\"<\/span>)<\/span>\n\tpublic<\/span> DiseasesList getDiseases<\/span>()<\/span> {<\/span>\n\t\tDiseasesList diseases =<\/span> \n\t\t\t\trestTemplate.<\/span>getForObject<\/span>(<\/span>\"http:\/\/pathology-service\/pathology\/diseases\"<\/span>,<\/span> DiseasesList.<\/span>class<\/span>);<\/span>\n\t\treturn<\/span> diseases;<\/span>\n\t}<\/span>\t\n}<\/span>\n<\/pre>\n
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Final HrResource File<\/h5>\n
@RestController<\/span>\n@RequestMapping<\/span>(<\/span>\"\/hr\"<\/span>)<\/span>\npublic<\/span> class<\/span> HrResource<\/span> {<\/span>\n\t\n\t\/\/Hardcoded list of employees<\/span>\n\tList<<\/span>Employee><\/span> employees =<\/span> Arrays.<\/span>asList<\/span>(<\/span>\n\t\tnew<\/span> Employee<\/span>(<\/span>\"E1\"<\/span>,<\/span> \"Kindson\"<\/span>,<\/span> \"Munonye\"<\/span>,<\/span> \"MedTech\"<\/span>),<\/span>\n\t\tnew<\/span> Employee<\/span>(<\/span>\"E2\"<\/span>,<\/span> \"Kate\"<\/span>,<\/span> \"Winters\"<\/span>,<\/span> \"Surgery\"<\/span>)<\/span>\n\t);<\/span>\n\t\n\t\/\/getEmployees returns list of employees<\/span>\n\t@RequestMapping<\/span>(<\/span>\"\/employees\"<\/span>)<\/span>\n\tpublic<\/span> EmployeesList getEmployees<\/span>()<\/span> {<\/span>\n\t\t\n\t\tEmployeesList employeesList =<\/span> new<\/span> EmployeesList();<\/span>\n\t\temployeesList.<\/span>setEmployees<\/span>(<\/span>employees);<\/span>\t\t\n\t\treturn<\/span> employeesList;<\/span>\n\t}<\/span>\n\t\n\t\/\/getEmployeeById returns an employee with the given Id<\/span>\n\t@RequestMapping<\/span>(<\/span>\"\/employees\/{Id}\"<\/span>)<\/span>\n\tpublic<\/span> Employee getEmployeeById<\/span>(<\/span>@PathVariable<\/span>(<\/span>\"Id\"<\/span>)<\/span> String Id)<\/span> {<\/span>\n\t\tEmployee e =<\/span> employees.<\/span>stream<\/span>()<\/span>\n\t\t\t\t.<\/span>filter<\/span>(<\/span>employee -><\/span>Id.<\/span>equals<\/span>(<\/span>employee.<\/span>getId<\/span>()))<\/span>\n\t\t\t\t.<\/span>findAny<\/span>()<\/span>\n\t\t\t\t.<\/span>orElse<\/span>(<\/span>null<\/span>);<\/span>\n\t\treturn<\/span> e;<\/span>\n\t}<\/span>\t\t\n}<\/span>\n<\/pre>\n
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 <\/p>\n
Final PathologyResource File<\/h5>\n
@RestController<\/span>\n@RequestMapping<\/span>(<\/span>\"\/pathology\"<\/span>)<\/span>\npublic<\/span> class<\/span> PathologyResource<\/span> {<\/span>\n\t\n\t\/\/Hardcoded list of diseases<\/span>\n\tprivate<\/span> List<<\/span>Disease><\/span> diseases =<\/span> Arrays.<\/span>asList<\/span>(<\/span>\n\t\tnew<\/span> Disease<\/span>(<\/span>\"D1\"<\/span>,<\/span> \"Ashma\"<\/span>,<\/span> \"Warm water bath\"<\/span>),<\/span>\n\t\tnew<\/span> Disease<\/span>(<\/span>\"D2\"<\/span>,<\/span> \"Headache\"<\/span>,<\/span> \"Panadol capsule\"<\/span>)<\/span>\n\t);<\/span>\n\t\n\t\/\/getDiseases returns a list of diseases<\/span>\n\t@RequestMapping<\/span>(<\/span>\"\/diseases\"<\/span>)<\/span>\n\tpublic<\/span> DiseasesList getDiseases<\/span>()<\/span> {<\/span>\n\t\tDiseasesList diseasesList =<\/span> new<\/span> DiseasesList();<\/span>\n\t\tdiseasesList.<\/span>setDiseases<\/span>(<\/span>diseases);<\/span>\n\t\treturn<\/span> diseasesList;<\/span>\n\t}<\/span>\n\t\n\t\/\/getDiseaseById returns the disease with the given Id<\/span>\n\t@RequestMapping<\/span>(<\/span>\"\/diseases\/{Id}\"<\/span>)<\/span>\n\tpublic<\/span> Disease getDiseaseById<\/span>(<\/span>@PathVariable<\/span>(<\/span>\"Id\"<\/span>)<\/span> String Id)<\/span> {<\/span>\n\t\t\n\t\tDisease d =<\/span> diseases.<\/span>stream<\/span>()<\/span>\n\t\t\t.<\/span>filter<\/span>(<\/span>disease -><\/span> Id.<\/span>equals<\/span>(<\/span>disease.<\/span>getId<\/span>()))<\/span>\n\t\t\t.<\/span>findAny<\/span>()<\/span>\n\t\t\t.<\/span>orElse<\/span>(<\/span>null<\/span>);<\/span>\t\n\t\t\n\t\treturn<\/span> d;<\/span>\n\t}<\/span>\t\n}<\/span>\n<\/pre>\n
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pom.xml for the admission-service<\/h5>\n
<?xml version=\"1.0\" encoding=\"UTF-8\"?><\/span>\n<project<\/span> xmlns=<\/span>\"http:\/\/maven.apache.org\/POM\/4.0.0\"<\/span> xmlns:xsi=<\/span>\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\"<\/span>\n\txsi:schemaLocation=<\/span>\"http:\/\/maven.apache.org\/POM\/4.0.0 http:\/\/maven.apache.org\/xsd\/maven-4.0.0.xsd\"<\/span>><\/span>\n\t<modelVersion><\/span>4.0.0<\/modelVersion><\/span>\n\t<parent><\/span>\n\t\t<groupId><\/span>org.springframework.boot<\/groupId><\/span>\n\t\t<artifactId><\/span>spring-boot-starter-parent<\/artifactId><\/span>\n\t\t<version><\/span>2.1.5.RELEASE<\/version><\/span>\n\t\t<relativePath\/><\/span> <!-- lookup parent from repository --><\/span>\n\t<\/parent><\/span>\n\t<groupId><\/span>com.kindsonthegenius<\/groupId><\/span>\n\t<artifactId><\/span>admissions-service<\/artifactId><\/span>\n\t<version><\/span>0.0.1-SNAPSHOT<\/version><\/span>\n\t<name><\/span>admissions-service<\/name><\/span>\n\t<description><\/span>Admissions Service<\/description><\/span>\n\n\t<properties><\/span>\n\t\t<java.version><\/span>1.8<\/java.version><\/span>\n\t\t<spring-cloud.version><\/span>Greenwich.SR1<\/spring-cloud.version><\/span>\n\t<\/properties><\/span>\n\n\t<dependencies><\/span>\t\n\t\t<dependency><\/span>\n\t\t\t<groupId><\/span>org.springframework.cloud<\/groupId><\/span>\n\t\t\t<artifactId><\/span>spring-cloud-starter-netflix-eureka-client<\/artifactId><\/span>\n\t\t<\/dependency><\/span>\n\t\t\n\t\t<dependency><\/span>\n\t\t\t<groupId><\/span>org.springframework.boot<\/groupId><\/span>\n\t\t\t<artifactId><\/span>spring-boot-starter-web<\/artifactId><\/span>\n\t\t<\/dependency><\/span>\n\n\t\t<dependency><\/span>\n\t\t\t<groupId><\/span>org.springframework.boot<\/groupId><\/span>\n\t\t\t<artifactId><\/span>spring-boot-starter-test<\/artifactId><\/span>\n\t\t\t<scope><\/span>test<\/scope><\/span>\n\t\t<\/dependency><\/span>\n\t<\/dependencies><\/span>\n\n\t<dependencyManagement><\/span>\n\t\t<dependencies><\/span>\n\t\t\t<dependency><\/span>\n\t\t\t\t<groupId><\/span>org.springframework.cloud<\/groupId><\/span>\n\t\t\t\t<artifactId><\/span>spring-cloud-dependencies<\/artifactId><\/span>\n\t\t\t\t<version><\/span>${spring-cloud.version}<\/version><\/span>\n\t\t\t\t<type><\/span>pom<\/type><\/span>\n\t\t\t\t<scope><\/span>import<\/scope><\/span>\n\t\t\t<\/dependency><\/span>\n\t\t<\/dependencies><\/span>\n\t<\/dependencyManagement><\/span>\n\n\t<build><\/span>\n\t\t<plugins><\/span>\n\t\t\t<plugin><\/span>\n\t\t\t\t<groupId><\/span>org.springframework.boot<\/groupId><\/span>\n\t\t\t\t<artifactId><\/span>spring-boot-maven-plugin<\/artifactId><\/span>\n\t\t\t<\/plugin><\/span>\n\t\t<\/plugins><\/span>\n\t<\/build><\/span>\n\t\n\t<repositories><\/span>\n\t    <repository><\/span> \n\t        <id><\/span>spring-milestones<\/id><\/span> \n\t        <name><\/span>Spring Milestone<\/name><\/span> \n\t        <url><\/span>http:\/\/repo.spring.io\/milestone<\/url><\/span> \n\t    <\/repository><\/span>\n\t<\/repositories><\/span>\n<\/project><\/span>\n<\/pre>\n
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application.properties file of the Discovery Server<\/h5>\n
server<\/span>.<\/span>port<\/span>=<\/span>8761<\/span>\neureka.<\/span>client<\/span>.<\/span>register<\/span>-<\/span>with-<\/span>eureka=<\/span>false<\/span>\neureka.<\/span>client<\/span>.<\/span>fetch<\/span>-<\/span>registry=<\/span>false<\/span>\n<\/pre>\n
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EmployeesList class<\/h5>\n
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public<\/span> class<\/span> EmployeesList<\/span> {<\/span>\n\t\n\tprivate<\/span> List<<\/span>Employee><\/span> employees;<\/span>\n\n\tpublic<\/span> List<<\/span>Employee><\/span> getEmployees<\/span>()<\/span> {<\/span>\n\t\treturn<\/span> employees;<\/span>\n\t}<\/span>\n\n\tpublic<\/span> void<\/span> setEmployees<\/span>(<\/span>List<<\/span>Employee><\/span> employees)<\/span> {<\/span>\n\t\tthis<\/span>.<\/span>employees<\/span> =<\/span> employees;<\/span>\n\t}<\/span>\t\t\n}<\/span>\n<\/pre>\n
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More Tutorials on Microservices<\/strong><\/h5>\n