Java: ArangoDB: Delete multiple documents

ArangoCollection interface provides 'deleteDocuments' method to delete multiple documents from the collection.

 

Signature

MultiDocumentEntity<DocumentDeleteEntity<Void>> deleteDocuments(Collection<?> values) throws ArangoDBException;
<T> MultiDocumentEntity<DocumentDeleteEntity<T>> deleteDocuments(Collection<?> values, Class<T> type, DocumentDeleteOptions options) throws ArangoDBException;

 

'values' specifies the keys of the documents or the documents themselves.

 

'DocumentDeleteOptions' is used to specifiy additional options like waitForSync, returnOld, silent etc.,

 

Example

collection.deleteDocuments(docKeysToDelete);

Find the below working application.

 

DocumentBulkDelete.java

package com.sample.app;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;

import com.arangodb.ArangoCollection;
import com.arangodb.ArangoDB;
import com.arangodb.ArangoDatabase;
import com.arangodb.entity.BaseDocument;
import com.arangodb.entity.DocumentCreateEntity;
import com.arangodb.entity.MultiDocumentEntity;
import com.arangodb.mapping.ArangoJack;
import com.arangodb.model.DocumentCreateOptions;

public class DocumentBulkDelete {
	private static final String USER_NAME = "root";
	private static final String PASSWORD = "tiger";
	private static final String HOST = "127.0.0.1";
	private static final int PORT = 8529;

	public static void main(String args[]) {
		// Get an ArangoDB instance
		ArangoDB arangoDB = new ArangoDB.Builder().user(USER_NAME).password(PASSWORD).host(HOST, PORT)
				.serializer(new ArangoJack()).build();

		String databaseName = "testdb";
		arangoDB.createDatabase(databaseName);

		ArangoDatabase arangoDatabase = arangoDB.db(databaseName);

		String collectionName = "test1";

		arangoDatabase.createCollection(collectionName);

		ArangoCollection collection = arangoDatabase.collection(collectionName);

		BaseDocument empDocument1 = new BaseDocument();
		empDocument1.addAttribute("firstName", "Krishna");
		empDocument1.addAttribute("lastName", "Gurram");
		empDocument1.addAttribute("hobbies", Arrays.asList("trekking", "playing cricket"));

		BaseDocument empDocument2 = new BaseDocument();
		empDocument2.addAttribute("firstName", "Joel");
		empDocument2.addAttribute("lastName", "Chelli");
		empDocument2.addAttribute("hobbies", Arrays.asList("designing games"));

		DocumentCreateOptions docOptions = new DocumentCreateOptions();
		docOptions.returnNew(true);

		MultiDocumentEntity<DocumentCreateEntity<BaseDocument>> persistedDocs = collection
				.insertDocuments(Arrays.asList(empDocument1, empDocument2), docOptions);

		Collection<DocumentCreateEntity<BaseDocument>> docs = persistedDocs.getDocuments();

		List<String> docKeysToDelete = new ArrayList<>();

		for (DocumentCreateEntity<BaseDocument> doc : docs) {
			System.out.println("\n");
			System.out.println("id : " + doc.getId());
			System.out.println("key : " + doc.getKey());
			System.out.println("rev : " + doc.getRev());
			System.out.println("doc : " + doc.getNew());

			docKeysToDelete.add(doc.getKey());
		}

		System.out.println("Deleting the documents\n");
		collection.deleteDocuments(docKeysToDelete);

		for (String key : docKeysToDelete) {
			if (collection.documentExists(key)) {
				System.out.println("Document is not deleted for the key " + key);
			} else {
				System.out.println("Document is not exist with the key " + key);
			}
		}

		// Dropping the collection and database
		collection.drop();
		arangoDatabase.drop();
		System.exit(0);
	}
}

Output

id : test1/62313
key : 62313
rev : _cS5XKHS---
doc : BaseDocument [documentRevision=_cS5XKHS---, documentHandle=test1/62313, documentKey=62313, properties={firstName=Krishna, lastName=Gurram, hobbies=[trekking, playing cricket]}]


id : test1/62314
key : 62314
rev : _cS5XKHS--A
doc : BaseDocument [documentRevision=_cS5XKHS--A, documentHandle=test1/62314, documentKey=62314, properties={firstName=Joel, lastName=Chelli, hobbies=[designing games]}]
Deleting the documents

Document is not exist with the key 62313
Document is not exist with the key 62314

  

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