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Async Http Client for Java and Scripting Language
- 1. Wri$ng Powerful HTTP Apps Using the New Asynchronous HTTP Client Library h@p://github.com/AsyncH@pClient/async-‐h@p-‐client Jeanfrancois Arcand Hubert Iwaniuk h@p://twi@er.com/jfarcand h@p://twi@er.com/neotyk
- 2. Creator of Creator of the Grizzly GlassFish v3 Creator and Co-‐ Framework Grizzly Micro Leader of Kernel Atmosphere Jeanfrancois 9 years @ Sun Creator Async Microsystem H@p Client Major contributor to GlassFish
- 3. • News and Update • Why • The Async H@p Client API • Conclusion • Q & A
- 4. Since released, we’ve got an impressive amount of contribu$ons and adop$ons. Library is evolving fast!
- 5. JDK’s UrlConnec$on Totally Broken Why
- 6. JDK’s Apache UrlConnec$on H@pClient high Totally Broken on steroid Why
- 7. JDK’s Apache UrlConnec$on H@pClient high Totally Broken on steroid Why Apache H@p is blocking
- 8. JDK’s Apache UrlConnec$on H@pClient high Totally Broken on steroid Why Apache H@p is blocking Apache H@pClient buffer the bytes in memory
- 9. JDK’s Apache UrlConnec$on H@pClient high Totally Broken on steroid Why Apache H@p is Apache H@pClient blocking is $ed to its own I/O layer. Apache H@pClient buffer the bytes in memory
- 10. AsyncH@pClient supports the “zero-‐copy” Why
- 11. AsyncH@pClient Large Upload supports the using na$ve memory “zero-‐copy” Small memory Why
- 12. AsyncH@pClient AsyncH@pClient supports the is not $ed to it’s “zero-‐copy” I/O layer Why
- 13. AsyncH@pClient AsyncH@pClient supports the is not $ed to it’s “zero-‐copy” I/O layer Ne@y JDK UrlConnec $on Why Apache H@pClient Grizzly
- 14. AsyncH@pClient AsyncH@pClient supports the is not $ed to it’s “zero-‐copy” I/O layer Why AsyncH@pClient is blocking or non blocking
- 15. AsyncH@pClient AsyncH@pClient supports the is not $ed to it’s “zero-‐copy” I/O layer Why AsyncH@pClient is blocking or non blocking Use the well Allow efficient know streaming Future<?> API
- 16. AsyncH@pClient AsyncH@pClient supports the is not $ed to it’s “zero-‐copy” I/O layer Why AsyncH@pClient is blocking or non blocking AsyncH@pClient doesn’t buffer the bytes in memory
- 17. AsyncH@pClient AsyncH@pClient supports the is not $ed to it’s “zero-‐copy” I/O layer Why AsyncH@pClient is blocking or non blocking Your applica$on have control AsyncH@pClient doesn’t buffer the bytes in memory
- 18. AsyncH@pClient AsyncH@pClient supports the is not $ed to it’s “zero-‐copy” I/O layer Why AsyncH@pClient is blocking or AsyncH@pClient is non blocking easy to use AsyncH@pClient doesn’t buffer the bytes in memory
- 19. Fully Asynchronous Calling Thread Server Thread Pool (*) request Response chunk callback Response chunk callback
- 20. Comple$onHandler Calling Thread Server Thread Pool (*) request Response start Response end callback
- 21. Future based API AsyncH@pClient asyncH@pClient = new AsyncH@pClient(); Future<Response> f = asyncH@pClient.prepareGet("h@p://www.sonatype.com/").execute(); Response r = f.get();
- 22. Handler based API AsyncH@pClient asyncH@pClient = new AsyncH@pClient(); Future<Response> asyncH@pClient. prepareGet("h@p://www.sonatype.com/").execute( new AsyncComple=onHandler<Response>( { @Override public Response onCompleted(Response r){ return response; } @Override public void onThrowable(Throwable t){ } });
- 23. Typed AsyncH@pClient asyncH@pClient = new AsyncH@pClient(); asyncH@pClient.prepareGet("h@p://www.sonatype.com/").execute( new AsyncComple$onHandler<Integer>( { @Override public Integer onCompleted(Response r){ return response.getStatus(); } @Override public void onThrowable(Throwable t){ } }).get(); // Return Integer
- 24. Request Builder AsyncH@pClient c= new AsyncH@pClient(); c.preparePost(“h@ps://….”) .setBody(body) .setHeader(header) .setProxy(proxy) .execute();
- 25. Streaming Handler AsyncH@pClient c = new AsyncH@pClient(); Future<String> f = c.prepareGet("h@p://www.sonatype.com/").execute( new AsyncHandler<String>() { @Override public STATE onStatusReceived(H@pResponseStatus<String> status) throws Excep$on { // return STATE.ABORT to stop } @Override public STATE onHeadersReceived(H@pResponseHeaders<String> headers) throws Excep$on { …} @Override public STATE onBodyPartReceived(H@pResponseBodyPart<String> bodyPart) throws Excep$on {…} }.get();
- 26. Progress Handler Future<String> f = h@pClient.preparePut(uri) .setRealm(createRealm()) .setProxyServer(createProxyServer()) .setFile(file) .execute(comple$onHandler); ("….").setFile(.execute( new AsyncComple=onHandler<String>() { @Override public STATE onHeaderWriteCompleted() { return STATE.CONTINUE; } @Override public STATE onContentWriteCompleted() { return STATE.CONTINUE; } @Override public STATE onContentWriteProgess(long amount, long current, long total) { return STATE.CONTINUE; } )
- 27. Configurable AsyncH@pClientConfig c = new AsyncH@pClientConfig.Builder(). setResponseTimeoutInMs(30000).build(); AsyncH@pClient asyncH@pClient = new AsyncH@pClient(c); Realm realm = new Realm.RealmBuilder() .setPrincipal(“me”) .setPassword(“xxxx”).build(); c.setRealm(realm); AsyncH@pClient asyncH@pClient = new AsyncH@pClient(c);
- 28. Zero Copy -‐ Upload AsyncH@pClient c= new AsyncH@pClient(); c.preparePost(“h@ps://….”) .setBody(body) .setFile(header) .setProxy(proxy).execute();
- 29. Zero Copy -‐ Download AsyncH@pClient c = new AsyncH@pClient(); Future<String> f = c.prepareGet("h@p://www.sonatype.com/").execute( new AsyncHandler<String>() { @Override public STATE onBodyPartReceived(H@pResponseBodyPart<String> bodyPart) throws Excep$on { bodyPart.write(OutputStream); } }.get();
- 30. TLS Support // Op$onal AsyncH@pClientConfig c = new AsyncH@pClientConfig.Builder(). setSSLEngine(…).build(); AsyncH@pClient asyncH@pClient = new AsyncH@pClient(c); Future<String> f = c.prepareGet("hBps://….").get();
- 31. Scrip$ng Support -‐ Clojure • (ns twi@er-‐stream (:require [h@p.async.client :as c] [org.danlarkin.json :as j] [clojure.contrib.logging :as l])) (doseq [twit-‐str (c/string (c/stream-‐seq :get "h@p://stream.twi@er.com/1/statuses/ sample.json" :auth {:user "u" :password "p"} :$meout -‐1))] (try (let [twit ( j/decode-‐from-‐str twit-‐str)] (l/info (str (get-‐in twit [:user :screen_name]) "=>" (:text twit)))) (catch Excep$on e (l/warn (str "Failed to parse: " twit-‐str) e))))
- 32. Scrip$ng Support -‐ JRuby client = AsyncH@pClient.new future = client.prepare_get("h@p://…") .set_header("X-‐Trace", "true").execute response = future.get response.headers.each { |pair| puts "#{pair.key} => #{pair.value.join(", ")}" } client.close
- 33. Scrip$ng Support -‐ Jython client = AsyncH@pClient() future = client.prepareGet("h@p://www.google.com/") .setHeaders({ "User-‐Agent" : [ "Async HTTP Client/1.0.0" ]}) .execute() response = future.get() for entry in response.headers: print '%s => %s' % (entry.key, ", ".join(entry.value)) client.close()
- 34. What’s Next • NTLM support • Websocket support • New Providers: – Grizzly 2.0 – Apache H@pClient • H@p Pipelining • Annota$on based support.
- 35. Fancy @BaseURL("h@p://localhost:12345") public interface FooClient { @GET("/") public Future<Response> getRoot(); @GET("/") public Future<String> getRootAsString(); @GET("/") public Future<String> getRootWithParam(@QueryParam("name") String name); } FancyClientBuilder builder = new FancyClientBuilder(asyncClient); FooClient client = builder.build(FooClient.class);