![Indizierung
curl -XPOST "http://localhost:9200/library/book" -d'
{
"title": "Elasticsearch in Action",
"author": [ "Radu Gheorghe",
"Matthew Lee Hinman",
"Roy Russo" ],
"published": "2015-06-30T00:00:00.000Z",
"publisher": {
"name": "Manning",
"country": "USA"
}
}'](https://image.slidesharecdn.com/elasticsearch-und-die-java-welt-151006122016-lva1-app6891/85/Elasticsearch-und-die-Java-Welt-7-320.jpg)
![Suche
curl -XPOST "http://localhost:9200/library/book/_search
?q=elasticsearch"
{
[...]
"hits": {
"hits": [
{
"_index": "library",
"_type": "book",
"_source": {
"title": "Elasticsearch in Action",
[...]](https://image.slidesharecdn.com/elasticsearch-und-die-java-welt-151006122016-lva1-app6891/85/Elasticsearch-und-die-Java-Welt-8-320.jpg)
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Elasticsearch und die Java-Welt
- 1. und die Java-Welt Florian Hopf @fhopf
- 2. Elasticsearch? „Elasticsearch is a distributed, open source search and analytics engine, designed for horizontal scalability, reliability, and easy management.“
- 3. Elasticsearch? „Elasticsearch is a distributed, open source search and analytics engine, designed for horizontal scalability, reliability, and easy management.“
- 5. Installation # download archive wget https://download.elastic.co/elasticsearch /elasticsearch/elasticsearch-1.7.2.zip # zip is for windows and linux unzip elasticsearch-1.7.2.zip # on windows: elasticsearch.bat elasticsearch-1.7.2/bin/elasticsearch
- 6. Zugriff per HTTP curl -XGET "http://localhost:9200" { "status": 200, "name": "Ultron", "cluster_name": "elasticsearch", "version": { "number" : "1.7.2", "build_hash" : "e43676b1385b8125...", "build_timestamp" : "2015-09-14T09:49:53Z", "build_snapshot" : false, "lucene_version" : "4.10.4" }, "tagline": "You Know, for Search" }
- 7. Indizierung curl -XPOST "http://localhost:9200/library/book" -d' { "title": "Elasticsearch in Action", "author": [ "Radu Gheorghe", "Matthew Lee Hinman", "Roy Russo" ], "published": "2015-06-30T00:00:00.000Z", "publisher": { "name": "Manning", "country": "USA" } }'
- 8. Suche curl -XPOST "http://localhost:9200/library/book/_search ?q=elasticsearch" { [...] "hits": { "hits": [ { "_index": "library", "_type": "book", "_source": { "title": "Elasticsearch in Action", [...]
- 9. Suche per Query DSL curl -XPOST "http://localhost:9200/library/book/_search" -d' { "query": { "filtered": { "query": { "match": { "title": "elasticsearch" } }, "filter": { "term": { "publisher.name": "manning" } } } } }'
- 10. Recap ● Auf Java basierender Suchserver ● HTTP und JSON ● Suche und Filterung über Query-DSL ● Facettierung über Aggregations ● Highlighting, Suggestions, ...
- 11. Elasticsearch? „Elasticsearch is a distributed, open source search and analytics engine, designed for horizontal scalability, reliability, and easy management.“
- 12. Verteilung
- 13. Verteilung
- 14. Verteilung
- 15. Suche im Cluster
- 16. Suche im Cluster
- 17. Recap ● Knoten können Cluster bilden ● Datenverteilung durch Sharding ● Replicas zur Lastverteilung und Ausfallsicherheit ● Verteilte Suche ● Cluster-Zustand auf jedem Knoten
- 18. Standard-Client
- 19. Java! dependencies { compile group: 'org.elasticsearch', name: 'elasticsearch', version: '1.7.2' }
- 20. Java! TransportAddress address = new InetSocketTransportAddress("localhost", 9300); Client client = new TransportClient(). addTransportAddress(address);
- 21. Suche per Query DSL curl -XPOST "http://localhost:9200/library/book/_search" -d' { "query": { "filtered": { "query": { "match": { "title": "elasticsearch" } }, "filter": { "term": { "publisher.name": "manning" } } } } }'
- 22. Suche über Java-Client SearchResponse searchResponse = client .prepareSearch("library") .setQuery(filteredQuery( matchQuery("title", "elasticsearch"), termFilter("publisher.name", "manning"))) .execute().actionGet(); assertEquals(1, searchResponse.getHits().getTotalHits()); SearchHit hit = searchResponse.getHits().getAt(0); assertEquals("Elasticsearch in Action", hit.getSource().get("title"));
- 23. Indizierung über Java-Client XContentBuilder jsonBuilder = jsonBuilder() .startObject() .field("title", "Elasticsearch") .field("author", "Florian Hopf") .startObject("publisher") .field("name", "dpunkt") .endObject() .endObject(); client.prepareIndex("library", "book") .setSource(jsonBuilder) .execute().actionGet();
- 25. Transport-Client ● Verbindet sich mit bestehendem Cluster TransportAddress address = new InetSocketTransportAddress("localhost", 9300); Client client = new TransportClient(). addTransportAddress(address);
- 26. Transport-Client
- 27. Node-Client Node node = nodeBuilder().client(true).node(); Client client = node.client();
- 28. Node-Client ● Startet eigenen Knoten ● Anwendung wird Teil des Clusters Node node = nodeBuilder().client(true).node(); Client client = node.client();
- 29. Node-Client
- 30. Standard-Client ● Volle API-Unterstützung ● Effiziente Kommunikation ● Node-Client ● Cluster-State spart unnötige Hops
- 31. Standard-Client Gotchas ● Elasticsearch-Version Client == Server ● Node-Client ● Bei Start und Stop wird Cluster-State übertragen ● Speicherverbrauch ● Elasticsearch-Dependency
- 32. Jest – Http Client
- 33. Jest
- 34. Jest dependencies { compile group: 'io.searchbox', name: 'jest', Version: '0.1.6' }
- 35. Client JestClientFactory factory = new JestClientFactory(); factory.setHttpClientConfig(new HttpClientConfig .Builder("http://localhost:9200") .multiThreaded(true) .build()); JestClient client = factory.getObject();
- 36. Suche mit Jest String query = jsonStringThatMagicallyAppears; Search search = new Search.Builder(query) .addIndex("library") .build(); SearchResult result = client.execute(search); assertEquals(Integer.valueOf(1), result.getTotal());
- 37. Suche mit Jest JsonObject jsonObject = result.getJsonObject(); JsonObject hitsObj = jsonObject.getAsJsonObject("hits"); JsonArray hits = hitsObj.getAsJsonArray("hits"); JsonObject hit = hits.get(0).getAsJsonObject(); // ... more boring code
- 38. Suche mit Jest public class Book { private String title; private List<String> author; private Publisher publisher; public Publisher getPublisher() { return publisher; } public void setPublisher(Publisher publisher) { this.publisher = publisher; } // more code }
- 39. Suche mit Jest Book book = result.getFirstHit(Book.class).source; assertEquals("Elasticsearch in Action", book.getTitle());
- 40. Jest ● Alternative HTTP-Implementierung ● Queries als String oder per Elasticsearch- Builder ● Indizieren und Suchen per Java-Beans
- 42. Spring Data ● Abstraktionen für Data-Stores ● Spezialitäten bleiben erhalten ● Dynamische Repository-Implementierung ● Populäre Implementierungen ● Spring Data JPA ● Spring Data MongoDB
- 43. Dependency dependencies { compile group: 'org.springframework.data', name: 'spring-data-elasticsearch', version: '1.2.0.RELEASE' }
- 44. Entity @Document( indexName = "library", type = "book") public class Book { private String id; private String title; private List<String> author; private Publisher publisher; // more code }
- 45. Repository public interface BookRepository extends ElasticsearchCrudRepository<Book, String> { public Iterable<Book> findByTitle(String title); }
- 46. Configuration <elasticsearch:node-client id="client" /> <bean name="elasticsearchTemplate" class="o.s.d.elasticsearch.core.ElasticsearchTemplate"> <constructor-arg name="client" ref="client"/> </bean> <elasticsearch:repositories base-package="de.fhopf.elasticsearch.springdata" />
- 47. Indexing Book book = new Book(); book.setTitle("Elasticsearch"); book.setAuthor(Arrays.asList("Florian Hopf")); book.setPublisher(new Publisher("dpunkt")); repository.save(book);
- 48. Searching Iterable<Book> books = repository.findAll(); books = repository.findByTitle("Elasticsearch");
- 49. Recap ● Abstraktion über Elasticsearch ● Entity-Beans ● Dynamische Repository-Implementierung ● Junges Projekt
- 50. Recap ● Standard-Client ● Node- oder Transport-Client ● Jest ● Http-Client mit Java-Bean-Unterstützung ● Spring-Data-Elasticsearch ● Annotationzentrierte Konfiguration, dynamische Repository-Implementierungen
- 51. JVM? ● Clojure: Elastisch ● Standard-Client oder HTTP ● Groovy: elasticsearch-groovy ● Standard-Client, Closure-Unterstützung ● Scala: große Auswahl, z.B. elastic4s ● Standard-Client, Type-Safety
- 53. Weitere Infos