You can get the documents that match to give example.
Example
Employee empWithAge32Example = new Employee();
empWithAge32Example.setAge(32);
Iterable<Employee> empsWithAge32 = employeeRepo.findAll(Example.of(empWithAge32Example));
Above snippet match all the documents whose age is 32.
Follow below step-by-step procedure to build complete working application.
Step 1: Create new maven project ‘documents-by-example-demo’.
Step 2: Update pom.xml with maven dependencies.
pom.xml
<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.sample.app</groupId>
<artifactId>documents-by-example-demo</artifactId>
<version>1</version>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-parent -->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.5</version>
</parent>
<dependencies>
<dependency>
<groupId>com.arangodb</groupId>
<artifactId>arangodb-spring-boot-starter</artifactId>
<version>2.3.3.RELEASE</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Step 3: Define Employee entity class.
Employee.java
package com.sample.app.entity;
import com.arangodb.springframework.annotation.ArangoId;
import com.arangodb.springframework.annotation.Document;
import org.springframework.data.annotation.Id;
@Document("employees")
public class Employee {
@Id // db document field: _key
private String key;
@ArangoId // db document field: _id
private String arangoId;
private Integer id;
private String firstName;
private String lastName;
private Integer age;
public Employee() {
}
public Employee(Integer id, String firstName, String lastName, Integer age) {
super();
this.id = id;
this.firstName = firstName;
this.lastName = lastName;
this.age = age;
}
public String getKey() {
return key;
}
public void setKey(String key) {
this.key = key;
}
public String getArangoId() {
return arangoId;
}
public void setArangoId(String arangoId) {
this.arangoId = arangoId;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "Employee [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + ", age=" + age + "]";
}
}
Step 4: Define repository interface.
EmployeeRepository.java
package com.sample.app.repository;
import com.arangodb.springframework.repository.ArangoRepository;
import com.sample.app.entity.Employee;
public interface EmployeeRepository extends ArangoRepository<Employee, String> {
}
Step 5: Define ArangoDB configuration.
ArangoConfig.java
package com.sample.app.config;
import com.arangodb.ArangoDB;
import com.arangodb.springframework.annotation.EnableArangoRepositories;
import com.arangodb.springframework.config.ArangoConfiguration;
import org.springframework.context.annotation.Configuration;
@Configuration
@EnableArangoRepositories(basePackages = { "com.sample.app" })
public class ArangoConfig implements ArangoConfiguration {
@Override
public ArangoDB.Builder arango() {
return new ArangoDB.Builder().host("localhost", 8529).user("root").password("tiger");
}
@Override
public String database() {
return "abc_org";
}
}
Step 6: Define main application class.
App.java
package com.sample.app;
import java.util.Arrays;
import java.util.List;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.data.domain.Example;
import com.sample.app.entity.Employee;
import com.sample.app.repository.EmployeeRepository;
@SpringBootApplication
public class App {
public static void main(String args[]) {
SpringApplication.run(App.class, args);
}
@Bean
public CommandLineRunner demo(EmployeeRepository employeeRepo) {
return (args) -> {
List<Employee> emps = Arrays.asList(new Employee(1, "Ram", "Gurram", 31),
new Employee(2, "Sundar", "Deavanagari", 32), new Employee(3, "Srinuvasa rao", "Guma", 43),
new Employee(4, "Madhavi Latha", "Gumma", 41), new Employee(5, "Gopi", "Battu", 33),
new Employee(6, "Sailu", "PTR", 33), new Employee(7, "Krishna", "Gurram", 32));
employeeRepo.saveAll(emps);
Employee empWithAge32Example = new Employee();
empWithAge32Example.setAge(32);
Iterable<Employee> empsWithAge32 = employeeRepo.findAll(Example.of(empWithAge32Example));
System.out.println("Employees with age 32");
for (Employee emp : empsWithAge32) {
System.out.println(emp);
}
};
}
}
Total project structure looks like below.
Run App.java, you will see below messages in console.
Employees with age 32 Employee [id=2, firstName=Sundar, lastName=Deavanagari, age=32] Employee [id=7, firstName=Krishna, lastName=Gurram, age=32]
You can download complete working application from below link.
https://github.com/harikrishna553/springboot/tree/master/arangodb/documents-by-example-demo
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