How do I programmatically set a partition-key to every instance of a class that I send?
For instance, If I send a Personinstance, then I want to set the partition-key to be person.getId().
class Person {
String id;
public Person(String id) {
this.id = id;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
#Override
public String toString() {
return "Person{" +
"id='" + id + '\'' +
'}';
}
}
#EnableBinding(Source.class)
public class SpringCloudStreamKinesisProducerApplication {
#InboundChannelAdapter(Source.OUTPUT)
public Person source() {
return new Person("my-id-123");
}
}
You can use the following property to set the partition key:
spring.cloud.stream.bindings.output.producer.partitionKeyExpression=payload.id
That will ensure that any Person instance that you are producing will be sent to the corresponding partition on the destination.
Related
Is there any way to make a super-class document (e.g. index name = user) and create two child classes (Admin, Guest) to save all this to user index but with different fields? E.g. Add to super-class field type and based on this field fetch right entity? ELK 7.19, Spring Data 4.3.1.
You can do that. Make the base class abstract. I have this in a test setup with the following classes:
#Document(indexName = "type-hints")
public abstract class BaseClass {
#Id
private String id;
#Field(type = FieldType.Text)
private String baseText;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getBaseText() {
return baseText;
}
public void setBaseText(String baseText) {
this.baseText = baseText;
}
#Override
public String toString() {
return "BaseClass{" +
"id='" + id + '\'' +
", baseText='" + baseText + '\'' +
'}';
}
}
public class DerivedOne extends BaseClass {
#Field(type = FieldType.Text)
private String derivedOne;
public String getDerivedOne() {
return derivedOne;
}
public void setDerivedOne(String derivedOne) {
this.derivedOne = derivedOne;
}
#Override
public String toString() {
return "DerivedOne{" +
"derivedOne='" + derivedOne + '\'' +
"} " + super.toString();
}
}
public class DerivedTwo extends BaseClass {
#Field(type = FieldType.Text)
private String derivedTwo;
public String getDerivedTwo() {
return derivedTwo;
}
public void setDerivedTwo(String derivedTwo) {
this.derivedTwo = derivedTwo;
}
#Override
public String toString() {
return "DerivedTwo{" +
"derivedTwo='" + derivedTwo + '\'' +
"} " + super.toString();
}
}
interface TypeHintRepository extends ElasticsearchRepository<BaseClass, String> {
SearchHits<? extends BaseClass> searchAllBy();
}
#RestController
#RequestMapping("/typehints")
public class TypeHintController {
private static final Logger LOGGER = LoggerFactory.getLogger(TypeHintController.class);
private final TypeHintRepository repository;
public TypeHintController(TypeHintRepository repository) {
this.repository = repository;
}
#GetMapping
public void test() {
List<BaseClass> docs = new ArrayList<>();
DerivedOne docOne = new DerivedOne();
docOne.setId("one");
docOne.setBaseText("baseOne");
docOne.setDerivedOne("derivedOne");
docs.add(docOne);
DerivedTwo docTwo = new DerivedTwo();
docTwo.setId("two");
docTwo.setBaseText("baseTwo");
docTwo.setDerivedTwo("derivedTwo");
docs.add(docTwo);
repository.saveAll(docs);
SearchHits<? extends BaseClass> searchHits = repository.searchAllBy();
for (SearchHit<? extends BaseClass> searchHit : searchHits) {
LOGGER.info(searchHit.toString());
}
}
}
I am trying to add default values to property attributes.I have one class inside which i have other class type injected as list.
I am able to get the default values for all attributes even on dependent class.I want to know is there any way using #value to add one more list of default values of custom objects.
My model classes are-
package com.example.test.Model;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
#Component
public class Employee {
#Value("1")
private Integer id;
#Value("Anubham")
private String name;
#Autowired
private List<Departments>departments;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public List<Departments> getDepartments() {
return departments;
}
public void setDepartments(List<Departments> departments) {
this.departments = departments;
}
public Employee() {
super();
}
public Employee(Integer id, String name, List<Departments> departments) {
super();
this.id = id;
this.name = name;
this.departments = departments;
}
#Override
public String toString() {
return "Employee [id=" + id + ", name=" + name + ", departments=" + departments + "]";
}
}
Another one is:
package com.example.test.Model;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
#Component
public class Departments {
#Value("1")
private int id;
#Value("computer")
String subject;
public Departments() {
super();
}
public Departments(int id, String subject) {
super();
this.id = id;
this.subject = subject;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getSubject() {
return subject;
}
public void setSubject(String subject) {
this.subject = subject;
}
#Override
public String toString() {
return "Departments [id=" + id + ", subject=" + subject + "]";
}
}
I am getting output as Employee [id=1, name=Anubham, departments=[Departments [id=1, subject=computer]]].
I want to have one more record for departments field.
I wonder is it possible using #value without using any other way.
In your example "Departments" is a bean that is injected into Employee bean. If you want to have multiple departments, you have to create interface/abstraction "Department" and implement it in beans with concrete values that you want (DepartmentA, DepartmentB).
But Value annotation is not meant do inject static content but rather values from properties files. I don't know what you want to achieve this way.
I am new to Spring boot and Spring Data JPA . So here i am trying to implement a sample project where a employee has list of workers , while adding a new worker has employee details also to indicate that he works for particular employee. I am able to update the worker table and also fetch the details perfectly . Am trying to update Employee table as well so that while fetching a particular employee i want the list of workers associated with him also to be fetched . But that is not happening , i haven't used any query so far as it seems simple updation and i thought just save and setters would help to do so .
Employee.Java
#Entity
public class Employee {
#Id
private int empId;
private String empName;
private String location;
#OneToMany
private List<Worker> workers;
public Employee(){
}
public Employee(int empId, String empName, String location) {
super();
this.empId = empId;
this.empName = empName;
this.location = location;
}
public List<Worker> getWorkers() {
return workers;
}
public void setWorkers(List<Worker> workers) {
this.workers = workers;
}
public int getEmpId() {
return empId;
}
public void setEmpId(int empId) {
this.empId = empId;
}
public String getEmpName() {
return empName;
}
public void setEmpName(String empName) {
this.empName = empName;
}
public String getLocation() {
return location;
}
public void setLocation(String location) {
this.location = location;
}
public void setWorkers(Worker worker) {
this.workers.add(worker);
}
#Override
public String toString() {
return "Employee [empId=" + empId + ", empName=" + empName + ", location=" + location + ", workers=" + workers
+ "]";
}
/*#Override
public String toString() {
return "Employee [empId=" + empId + ", empName=" + empName + ", location=" + location + "]";
}*/
Worker.Java
#Entity
public class Worker {
#Id
private int id;
private String name;
#ManyToOne
#JoinColumn(name="empId")
private Employee employee;
public Worker(int id, String name , int empId) {
super();
this.id = id;
this.name = name;
this.employee = new Employee(empId,"","");
}
public Worker() {
// TODO Auto-generated constructor stub
}
public Employee getEmployee() {
return employee;
}
public void setEmployee(Employee employee) {
this.employee = employee;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
WorkerController.Java
#RestController
public class WorkerController {
#Autowired
WorkerRepository workerService;
#Autowired
EmployeeRepository employeeService;
#GetMapping("/employees/{id}/workers")
public List<Worker> getAllWorker(#PathVariable("id") int empId){
return workerService.findByEmployeeEmpId(empId);
}
#PostMapping("/employees/{id}/workers")
public String addNewEmployee(#RequestParam("name") String name ,
#RequestParam("workerId") int id , #PathVariable("id") int empId){
Worker worker = new Worker();
List<Worker> workers = new ArrayList<Worker>();
worker.setId(id);
worker.setName(name);
worker.setEmployee(new Employee(empId,"",""));
workerService.save(worker);
workers.add(worker);
employeeService.findById(empId).get().setWorkers(workers);
Employee emp = new Employee();
emp = employeeService.findById(empId).get();
return "Successfully added";
}
}
After adding worker , i retrieve the following as output
[
{
"id": 108,
"name": "vijay",
"employee": {
"empId": 99,
"empName": "darsha",
"location": "mumbai",
"workers": []
}
},
{
"id": 110,
"name": "suraj",
"employee": {
"empId": 99,
"empName": "darsha",
"location": "mumbai",
"workers": []
}
}
]
but while retrieving i could see the employee table is not updated. can someone guide me .
{
"empId": 99,
"empName": "darsha",
"location": "mumbai",
"workers": []
}
You says:
"...while fetching a particular employee i want the list of workers
associated with him also to be fetched"
then you have to write a OneToMany Relationship on employee's side. What you do is you tries to fetch for each Worker one Employee which is of course working and is there in your JSON result.
Here is a OneToMany Example on Emplyees class side:
#OneToMany(mappedBy="employee", fetch=FetchType.EAGER, cascade=CascadeType.ALL)
private List<Worker> worker = new ArrayList<>();
Note: mappedBy have to refer to the variable Emplyee employee in your Worker Class.
Please try different fetch types also.
Why you are not getting your #OneToMany attributes is due fetch type is lazy by default for all #OneToMany associations like list, set.
To overcome this problem. Change the default lazy fetch to eager fetch.
Modify your entity mapping to this.
#OneToMany(mappedBy="employee", fetch=FetchType.EAGER, cascade=CascadeType.ALL) private List<Worker> worker = new ArrayList<>();
while fetching you may get recursive mapping. To avoid this just add #JsonIgnoreProperties to your employee field in worker class.
Example:
#JsonIgnoreProperties("employee")
#ManyToOne
#JoinColumn(name="empId")
private Employee employee;
In my spring boot project I created a Repository interface (which extends CRUDRepository) and an Entity class of the Table in my DB.
This is my Repo:
#Repository
public interface AuthPaymentDao extends CrudRepository<TFraudCard,String> {
#Query("SELECT t FROM TFraudCard t where t.tokenNumber = (?1)")
TFraudCard findByTokenNumber(String tokenNumber);
}
This is my Entity Class (TOKEN_NUMBER is the primary Key in the TFRAUDCARD TABLE):
#Entity
#Table(name = "TFRAUDCARD")
public class TFraudCard {
#Id
#Column(name="TOKEN_NUMBER")
private String tokenNumber;
#Column(name="TRANSACTIONNUMBER")
private int transactionNumber;
#Column(name="CARDNUMBER")
private int cardNumber;
#Column(name="DATEADDED", insertable = false, updatable = false, nullable = false)
private Timestamp dateAdded;
#Column(name="CALLINGENTITY", nullable = false)
private String callingEntity;
#Column(name="ACCOUNTID")
private String accountId;
#Column(name="ROUTINGNUMBER")
private String routingNumber;
#Column(name="BANKACCOUNTNUMBER")
private String bankAccountNumber;
#Column(name="COMMENTS")
private String comments;
#Column(name="USERID")
private String userId;
#Column(name="REMOVEDATE")
private Timestamp removeDate;
public String getTokenNumber() {
return tokenNumber;
}
public void setTokenNumber(String tokenNumber) {
this.tokenNumber = tokenNumber;
}
public int getTransactionNumber() {
return transactionNumber;
}
public void setTransactionNumber(int transactionNumber) {
this.transactionNumber = transactionNumber;
}
public int getCardNumber() {
return cardNumber;
}
public void setCardNumber(int cardNumber) {
this.cardNumber = cardNumber;
}
public Timestamp getDateAdded() {
return dateAdded;
}
public void setDateAdded(Timestamp dateAdded) {
this.dateAdded = dateAdded;
}
public String getCallingEntity() {
return callingEntity;
}
public void setCallingEntity(String callingEntity) {
this.callingEntity = callingEntity;
}
public String getAccountId() {
return accountId;
}
public void setAccountId(String accountId) {
this.accountId = accountId;
}
public String getRoutingNumber() {
return routingNumber;
}
public void setRoutingNumber(String routingNumber) {
this.routingNumber = routingNumber;
}
public String getBankAccountNumber() {
return bankAccountNumber;
}
public void setBankAccountNumber(String bankAccountNumber) {
this.bankAccountNumber = bankAccountNumber;
}
public String getComments() {
return comments;
}
public void setComments(String comments) {
this.comments = comments;
}
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
public Timestamp getRemoveDate() {
return removeDate;
}
public void setRemoveDate(Timestamp removeDate) {
this.removeDate = removeDate;
}
public TFraudCard() {
super();
}
public TFraudCard(String tokenNumber, int transactionNumber, int cardNumber, Timestamp dateAdded,
String callingEntity, String accountId, String routingNumber, String bankAccountNumber, String comments,
String userId, Timestamp removeDate) {
super();
this.tokenNumber = tokenNumber;
this.transactionNumber = transactionNumber;
this.cardNumber = cardNumber;
this.dateAdded = dateAdded;
this.callingEntity = callingEntity;
this.accountId = accountId;
this.routingNumber = routingNumber;
this.bankAccountNumber = bankAccountNumber;
this.comments = comments;
this.userId = userId;
this.removeDate = removeDate;
}
#Override
public String toString() {
return "TFraudCard [tokenNumber=" + tokenNumber + ", transactionNumber=" + transactionNumber + ", cardNumber="
+ cardNumber + ", dateAdded=" + dateAdded + ", callingEntity=" + callingEntity + ", accountId="
+ accountId + ", routingNumber=" + routingNumber + ", bankAccountNumber=" + bankAccountNumber
+ ", comments=" + comments + ", userId=" + userId + ", removeDate=" + removeDate + "]";
}
}
My Service Class:
Autowiring the DAO instance inside my Service Class:
Implementing the DAO instance inside a Method in the Service Class:
private void fraudCheck(PaymentDetail paymentDetail) throws RegularPaymentBusinessException {
logger.info("INSIDE FRAUD CHECK METHOD");
String pmtInd=paymentDetail.getPmtInd();
logger.info("pmtInd: " + pmtInd);
String tokenizedCardNum=paymentDetail.getTokenizedCardNum();
logger.info("tokenizedCardNum: " + tokenizedCardNum);
if(pmtInd.equalsIgnoreCase(VepsConstants.GIFT_CARD_IDENTIFIER) || pmtInd.equalsIgnoreCase(VepsConstants.CREDIT_CARD_IDENTIFIER) || pmtInd.equalsIgnoreCase(VepsConstants.DEBIT_CARD_IDENTIFIER)) {
logger.info("INSIDE CARD CHECK");
TFraudCard fraudCard = authPaymentDao.findByTokenNumber(tokenizedCardNum);
logger.info("fraudCard Details: " + fraudCard.toString());
if(fraudCard!=null) {
logger.info("INSIDE EXCEPTION FLOW FOR CARD FRAUD CHECK");
throw new RegularPaymentBusinessException(VepsConstants._9966, VepsConstants._9966_MESSAGE, VepsConstants.FAILURE);
}
}
}
Even though I pass the same token Number (tokenizedCardNumber) in my method as the data in the TOKEN_NUMBER column of my TFRAUDCARD table I still get a NullPointerException when I try to print a toString() of the Entity Object.
Here is the NullPointerException on my cloudFoundry logs (Click on it to see zoomed image) :
I'm providing the DB details in my dev properties file:
I have gone over every scenario in my head for why it breaks but I still can't come up with an answer. I'm using my variable marked with #Id i.e. the Primary Key for my find() method in the Repository.
I'm also adding a #Query annotation just to be even more specific.
It still does not work.
I am trying to fetch a row in mongo db collection which has an array of object id which is the ObjectID of rows of data in other collection. I want to fetch the populated array of rows of data from ther collection for each record of data from the current collection.
My collections are like this
Jobs
- ObjectID
- [ObjectIds(Object Ids of candidates)]
Candidates
-ObjectID
-Name
-Age
I am using
import org.springframework.data.mongodb.core.mapping.DBRef;
in my model class to indicate the reference.
#Document(collection = "jobcreations")
public class Job {
#Id
private String id;
#DBRef
private List<Candidate> _candidates;
private String jobID;
public String getjobID() {
return jobID;
}
public void setjobID(String jobid) {
this.jobID = jobid;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public JobCreation() {
super();
}
public List<Candidate> get_candidates() {
return _candidates;
}
public void set_candidates(List<Candidate> _candidates) {
this._candidates = _candidates;
}
public JobCreation(String jobID) {
super();
this.jobID = jobID;
}
#Override
public String toString() {
return "JobCreation [id=" + id + ", _candidates=" + _candidates + ", jobID=" + jobID + "]";
}
}
My candidate model class is like this
import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;
#Document(collection = "candidate")
public class Candidate {
#Id
private String _id;
private String name;
private int age;
public String get_id() {
return _id;
}
public void set_id(String _id) {
this._id = _id;
}
/**
* #return the name
*/
public String getName() {
return name;
}
/**
* #param name the name to set
*/
public void setName(String name) {
this.name = name;
}
/**
* #return the age
*/
public String getAge() {
return age;
}
/**
* #param age the age to set
*/
public void setAge(int age) {
this.age = age;
}
public Candidate() {
super();
// TODO Auto-generated constructor stub
}
}
My main method where i call the db is
ApplicationContext ctx = new AnnotationConfigApplicationContext(SpringMongoConfig.class);
MongoOperations mongoOperation = (MongoOperations) ctx.getBean("mongoTemplate");
List<JobCreation> listJobCreation = mongoOperation.findAll(JobCreation.class);
for(JobCreation jc : listJobCreation){
System.out.println(jc.toString());
}
Here i am getting the error
Exception in thread "main" org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type org.bson.types.ObjectId to type com.mkyong.model.CandidateProfile
at org.springframework.core.convert.support.GenericConversionService.handleConverterNotFound(GenericConversionService.java:276)
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:172)
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:154)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.getPotentiallyConvertedSimpleRead(MappingMongoConverter.java:673)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.readCollectionOrArray(MappingMongoConverter.java:751)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.readValue(MappingMongoConverter.java:1006)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.access$100(MappingMongoConverter.java:75)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter$MongoDbPropertyValueProvider.getPropertyValue(MappingMongoConverter.java:957)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.getValueInternal(MappingMongoConverter.java:713)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter$2.doWithAssociation(MappingMongoConverter.java:257)
at org.springframework.data.mapping.model.BasicPersistentEntity.doWithAssociations(BasicPersistentEntity.java:252)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:254)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:212)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:176)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:172)
at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:75)
at org.springframework.data.mongodb.core.MongoTemplate$ReadDbObjectCallback.doWith(MongoTemplate.java:1840)
at org.springframework.data.mongodb.core.MongoTemplate.executeFindMultiInternal(MongoTemplate.java:1536)
at org.springframework.data.mongodb.core.MongoTemplate.findAll(MongoTemplate.java:1057)
at com.mkyong.core.App.main(App.java:29)
Kindly help me how to solve this error.
Thanks in advance