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Aura example
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examples/src/main/java/org/neo4j/docs/driver/DriverIntroductionExample.java
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| /* | ||
| * Copyright (c) 2002-2020 "Neo4j," | ||
| * Neo4j Sweden AB [http://neo4j.com] | ||
| * | ||
| * This file is part of Neo4j. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.neo4j.docs.driver; | ||
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| // tag::driver-introduction-example-import[] | ||
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| import org.neo4j.driver.*; | ||
| import org.neo4j.driver.exceptions.Neo4jException; | ||
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| import java.util.Collections; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import java.util.logging.Level; | ||
| import java.util.logging.Logger; | ||
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| import static org.neo4j.driver.Config.TrustStrategy.trustAllCertificates; | ||
| // end::driver-introduction-example-import[] | ||
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| // tag::driver-introduction-example[] | ||
| public class DriverIntroductionExample implements AutoCloseable { | ||
| private static final Logger LOGGER = Logger.getLogger(DriverIntroductionExample.class.getName()); | ||
| private final Driver driver; | ||
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| public DriverIntroductionExample(String uri, String user, String password, Config config) { | ||
| // The driver is a long living object and should be opened during the start of your application | ||
| driver = GraphDatabase.driver(uri, AuthTokens.basic(user, password), config); | ||
| } | ||
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| @Override | ||
| public void close() throws Exception { | ||
| // The driver object should be closed before the application ends. | ||
| driver.close(); | ||
| } | ||
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| public void createFriendship(final String person1Name, final String person2Name) { | ||
| // To learn more about the Cypher syntax, see https://neo4j.com/docs/cypher-manual/current/ | ||
| // The Reference Card is also a good resource for keywords https://neo4j.com/docs/cypher-refcard/current/ | ||
| String createFriendshipQuery = "CREATE (p1:Person { name: $person1_name })\n" + | ||
| "CREATE (p2:Person { name: $person2_name })\n" + | ||
| "CREATE (p1)-[:KNOWS]->(p2)\n" + | ||
| "RETURN p1, p2"; | ||
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| Map<String, Object> params = new HashMap<>(); | ||
| params.put("person1_name", person1Name); | ||
| params.put("person2_name", person2Name); | ||
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| try (Session session = driver.session()) { | ||
| // Write transactions allow the driver to handle retries and transient errors | ||
| Record record = session.writeTransaction(tx -> { | ||
| Result result = tx.run(createFriendshipQuery, params); | ||
| return result.single(); | ||
| }); | ||
| System.out.println(String.format("Created friendship between: %s, %s", | ||
| record.get("p1").get("name").asString(), | ||
| record.get("p2").get("name").asString())); | ||
| // You should capture any errors along with the query and data for traceability | ||
| } catch (Neo4jException ex) { | ||
| LOGGER.log(Level.SEVERE, createFriendshipQuery + " raised an exception", ex); | ||
| throw ex; | ||
| } | ||
| } | ||
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| public void findPerson(final String personName) { | ||
| String readPersonByNameQuery = "MATCH (p:Person)\n" + | ||
| "WHERE p.name = $person_name\n" + | ||
| "RETURN p.name AS name"; | ||
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| Map<String, Object> params = Collections.singletonMap("person_name", personName); | ||
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| try (Session session = driver.session()) { | ||
| Record record = session.readTransaction(tx -> { | ||
| Result result = tx.run(readPersonByNameQuery, params); | ||
| return result.single(); | ||
| }); | ||
| System.out.println(String.format("Found person: %s", record.get("name").asString())); | ||
| // You should capture any errors along with the query and data for traceability | ||
| } catch (Neo4jException ex) { | ||
| LOGGER.log(Level.SEVERE, readPersonByNameQuery + " raised an exception", ex); | ||
| throw ex; | ||
| } | ||
| } | ||
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| public static void main(String... args) throws Exception { | ||
| // Aura queries use an encrypted connection using the "neo4j+s" protocol | ||
| String boltUrl = "%%BOLT_URL_PLACEHOLDER%%"; | ||
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| String user = "<Username for Neo4j Aura database>"; | ||
| String password = "<Password for Neo4j Aura database>"; | ||
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| // Aura queries use an encrypted connection | ||
| Config config = Config.builder().withEncryption().build(); | ||
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| try (DriverIntroductionExample app = new DriverIntroductionExample(boltUrl, user, password, Config.defaultConfig())) { | ||
| app.createFriendship("Alice", "David"); | ||
| app.findPerson("Alice"); | ||
| } | ||
| } | ||
| } | ||
| // end::driver-introduction-example[] |
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