Spring Boot, Spring Data & MongoDB Long Sequence not getting generated - mongodb

Question

Spring Boot Version: 1.5.7.RELEASE
Spring Data
MongoDB
My attempt is to add a simple TODO in TODO Document in MongoDB. I was able to add it if I go by String id.But I want my id to be Long. And my requirement is to generate my own sequence. I am having issues generating sequence with the following code. Appreciate if you point where I am going wrong. I was able to add if I create my own id instead of using a sequence.
package com.srisris.tapasya.springjersey;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;
import com.srisris.tapasya.springjersey.domain.ToDo;
import com.srisris.tapasya.springjersey.domain.ToDoSequence;
import com.srisris.tapasya.springjersey.repository.ToDoRepository;
import com.srisris.tapasya.springjersey.repository.ToDoSequenceRepository;
#SpringBootApplication(scanBasePackages = { "com.srisris.tapasya.springjersey" })
public class SpringJerseyApplication extends SpringBootServletInitializer implements CommandLineRunner {
#Autowired
private ToDoRepository todoRepository;
/**
* The repository for the sequence {#link ToDoSequence}
*/
#Autowired
private ToDoSequenceRepository sequenceRepo;
// The sequence key name for the books
private static final String ToDo_SEQ_KEY = ToDo.COLLECTION_NAME;
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
return builder.sources(SpringJerseyApplication.class);
}
public static void main(String[] args) {
SpringApplication.run(SpringJerseyApplication.class, args);
}
#Override
public void run(String... arg0) throws Exception {
todoRepository.deleteAll();
bootStrapToDo();
}
private void bootStrapToDo() throws Exception{
DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
Date date = new Date();
Long sequenceId = sequenceRepo.getNextSequenceId(ToDo_SEQ_KEY);
System.out.println(" Sequence ID is " + sequenceId);
ToDo td1 = new ToDo(sequenceId,"Work on Java", "Learn Lambdas, Modules & clojures", dateFormat.format(date));
todoRepository.save(td1);
//ToDo td2 = new ToDo(sequenceRepo.getNextSequenceId(ToDo_SEQ_KEY),"Work on Swift", "Learn Optionals", dateFormat.format(date));
//todoRepository.save(td2);
}
}
ToDo Domain
package com.srisris.tapasya.springjersey.domain;
import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;
#Document(collection = ToDo.COLLECTION_NAME)
public class ToDo {
public static final String COLLECTION_NAME = "todos";
#Id
private Long id;
private String summary;
private String description;
private String dateCreated;
public ToDo() {
}
public ToDo(Long todoID, String summary, String description, String dateCreated) {
this.id = todoID;
this.summary = summary;
this.description = description;
this.dateCreated = dateCreated;
}
public Long getId() {
return id;
}
public void setId(Long todoID) {
this.id = todoID;
}
public String getSummary() {
return summary;
}
public String getDescription() {
return description;
}
public String getDateCreated() {
return dateCreated;
}
#Override
public String toString() {
return String.format("ToDo[id=%s, summary='%s', description='%s' , dateCreated='%s']", id, summary, description,
dateCreated);
}
}
Custom Sequence Domain
ToDoSequence
package com.srisris.tapasya.springjersey.domain;
import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;
#Document(collection = ToDoSequence.COLLECTION_NAME)
public class ToDoSequence {
public static final String COLLECTION_NAME = "todoSequence";
#Id
private String id;
private Long sequence;
public ToDoSequence() {
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public Long getSequence() {
return sequence;
}
public void setSequence(Long seq) {
this.sequence = seq;
}
}
ToDoRepository
package com.srisris.tapasya.springjersey.repository;
import java.util.List;
import org.springframework.data.mongodb.repository.MongoRepository;
import com.srisris.tapasya.springjersey.domain.ToDo;
public interface ToDoRepository extends MongoRepository<ToDo, Long> {
public ToDo findBySummary(String summary);
public List<ToDo> findByDateCreated(String dateCreated);
}
ToDoSequenceRepository
package com.srisris.tapasya.springjersey.repository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.FindAndModifyOptions;
import org.springframework.data.mongodb.core.MongoOperations;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.mongodb.core.query.Update;
import org.springframework.stereotype.Repository;
import com.srisris.tapasya.springjersey.domain.ToDoSequence;
#Repository
public class ToDoSequenceRepository {
#Autowired
private MongoOperations mongoOperation;
public Long getNextSequenceId(String key) throws Exception {
Query query = new Query(Criteria.where("_id").is(key));
// increase sequence id by 1
Update update = new Update();
update.inc("sequence", 1);
// return new increased id
FindAndModifyOptions options = new FindAndModifyOptions();
options.returnNew(true);
// this is the magic happened.
ToDoSequence seqId = mongoOperation.findAndModify(query, update, options, ToDoSequence.class);
// if no id, throws SequenceException
// optional, just a way to tell user when the sequence id is failed to
// generate.
if (seqId == null) {
throw new Exception(seqId + " Unable to get sequence id for key : " + key);
}
return seqId.getSequence();
}
}