Spring data: ArangoDB: Delete an index

CollectionOperations interface provides ‘'dropIndex' method to drop an index.

 

Signature

void dropIndex(String id) throws DataAccessException;

Deletes the index with the given {@code id} from the collection.

 

Example

empsCollection.dropIndex(indexId);

Find the below working application.

 

Step 1: Create new maven project ‘collection-operations-delete-index’.

 

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>collection-operations-delete-index</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 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 name;
	private double locationLongitude;
	private double locationLatitude;

	public Employee(Integer id, String name, double locationLongitude, double locationLatitude) {
		super();

		this.id = id;
		this.name = name;
		this.locationLongitude = locationLongitude;
		this.locationLatitude = locationLatitude;
	}

	public Employee() {

	}

	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 getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public double getLocationLongitude() {
		return locationLongitude;
	}

	public void setLocationLongitude(double locationLongitude) {
		this.locationLongitude = locationLongitude;
	}

	public double getLocationLatitude() {
		return locationLatitude;
	}

	public void setLocationLatitude(double locationLatitude) {
		this.locationLatitude = locationLatitude;
	}

	@Override
	public String toString() {
		return "Employee [key=" + key + ", arangoId=" + arangoId + ", id=" + id + ", name=" + name
				+ ", locationLongitude=" + locationLongitude + ", locationLatitude=" + locationLatitude + "]";
	}

}

Step 4: Define arango db configuration class.

 

ArangoConfig.java

package com.sample.app.config;

import org.springframework.context.annotation.Configuration;

import com.arangodb.ArangoDB;
import com.arangodb.springframework.annotation.EnableArangoRepositories;
import com.arangodb.springframework.config.ArangoConfiguration;

@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 5: Define main application class.

 

App.java

package com.sample.app;

import java.util.Arrays;
import java.util.Collection;

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.context.annotation.Bean;

import com.arangodb.entity.IndexEntity;
import com.arangodb.model.GeoIndexOptions;
import com.arangodb.springframework.core.ArangoOperations;
import com.arangodb.springframework.core.CollectionOperations;
import com.sample.app.entity.Employee;

@SpringBootApplication
public class App {

	@Autowired
	private ArangoOperations arangoTemplate;

	public static void main(String args[]) {
		SpringApplication.run(App.class, args);
	}

	private static void printIndexes(CollectionOperations collectionOperations) {
		Collection<IndexEntity> indexes = collectionOperations.getIndexes();

		System.out.println("\nTotal indexes : " + indexes.size());

		for (IndexEntity indexEntity : indexes) {
			System.out.println("\nindex details");
			System.out.println("\tname : " + indexEntity.getName());
			System.out.println("\tIndex created on fields : " + indexEntity.getFields());
		}

	}

	@Bean
	public CommandLineRunner demo() {

		return (args) -> {
			Employee emp1 = new Employee(1, "Krishna", 29.9792, 31.1342);

			arangoTemplate.insert(emp1);

			Iterable<Employee> empsIterable = arangoTemplate.findAll(Employee.class);

			System.out.println("Documents in employees collection");
			for (Employee emp : empsIterable) {
				System.out.println(emp);
			}

			CollectionOperations empsCollection = arangoTemplate.collection(Employee.class);

			GeoIndexOptions gersistentIndexOptions = new GeoIndexOptions();
			gersistentIndexOptions.name("locationIndex");

			IndexEntity indexEntity = empsCollection
					.ensureGeoIndex(Arrays.asList("locationLongitude", "locationLatitude"), gersistentIndexOptions);

			printIndexes(empsCollection);

			System.out.println("\nDropping the index 'locationIndex'\n");
			empsCollection.dropIndex(indexEntity.getId());

			printIndexes(empsCollection);

			System.out.println("\nDropping the collection");

			empsCollection.drop();

		};
	}
}

Total project structure looks like below.

Run App.java, you will see below messages in console.

Documents in employees collection
Employee [key=57460, arangoId=employees/57460, id=1, name=Krishna, locationLongitude=29.9792, locationLatitude=31.1342]

Total indexes : 2

index details
	name : primary
	Index created on fields : [_key]

index details
	name : locationIndex
	Index created on fields : [locationLongitude, locationLatitude]

Dropping the index 'locationIndex'


Total indexes : 1

index details
	name : primary
	Index created on fields : [_key]

Dropping the collection

You can download complete working application from below link.

https://github.com/harikrishna553/springboot/tree/master/arangodb/collection-operations-delete-index

  

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