Java: ArangoDB: Read multiple documents

ArangoCollection interface provides ‘getDocuments’ method to read multiple documents in one shot.

 

Signature

<T> MultiDocumentEntity<T> getDocuments(Collection<String> keys, Class<T> type) throws ArangoDBException;
<T> MultiDocumentEntity<T> getDocuments(Collection<String> keys, Class<T> type, DocumentReadOptions options) throws ArangoDBException;

 

'DocumentReadOptions' options specify additional options like allowDirtyRead, ifMatch, ifNoneMatch etc.,

 

Example

MultiDocumentEntity<BaseDocument> multiDocEntity = collection.getDocuments(docKeys, BaseDocument.class);

 

Find the below working application.

 

DocumentsBulkRead.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;

public class DocumentsBulkRead {
	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"));

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

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

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

		for (DocumentCreateEntity<BaseDocument> doc : docs) {
			docKeys.add(doc.getKey());
		}

		MultiDocumentEntity<BaseDocument> multiDocEntity = collection.getDocuments(docKeys, BaseDocument.class);

		Collection<BaseDocument> docsTemp = multiDocEntity.getDocuments();

		for (BaseDocument doc : docsTemp) {
			System.out.println("\n");
			System.out.println("id : " + doc.getId());
			System.out.println("key : " + doc.getKey());
			System.out.println("properties : " + doc.getProperties());
			
		}

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

Output

id : test1/59280
key : 59280
properties : {firstName=Krishna, lastName=Gurram, hobbies=[trekking, playing cricket]}


id : test1/59281
key : 59281
properties : {firstName=Joel, lastName=Chelli, hobbies=[designing games]}

  

Previous                                                    Next                                                    Home