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Oracle REST Data Services

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So you're an Oracle DBA or database developer and you've been hearing about this "REST-thing" and apparently it's way cool for exchanging data. This session for any database folk who missed the trend, covers at a high level what this REST thing is all about, then takes a look at Oracle REST Data Services (ORDS) that allows you to expose your database objects via HTTP, and then walk through how Oracle SQL Developer makes this a breeze to setup.

Veröffentlicht in: Technologie

Oracle REST Data Services

  1. 1. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Creating RESTful APIs With Oracle Database REST Data Services Chris Muir Development Tools Product Management September, 2015
  2. 2. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Safe Harbor Statement The following is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracle’s products remains at the sole discretion of Oracle. 2
  3. 3. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Program Agenda REST & JSON Overview Oracle REST Data Services Overview Demonstration 1 2 3 3
  4. 4. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | 4 You tell me What is REST?
  5. 5. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | REpresentational State Transfer (REST) 5 An architectural style to defining, publishing and consuming APIs and services on the internet using HTTP. - Formal definition (Zzzzzz) Zzzzzzz… Think of REST as a high level protocol for exchanging data across HTTP in a computer & developer friendly way. - Anonymous product manager
  6. 6. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | REpresentational State Transfer (REST) 6 Does describe how the internet works But we mostly talk about it in terms of "web services" That is software "sharing data" A contemporary replacement for "SOAP"
  7. 7. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | S O A P imple bject ccess rotocol <xmlHell/> <XML/> REST { 'json':true }
  8. 8. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | 8 Why should you care about REST web services?
  9. 9. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | 9 Why does Oracle care about REST web services? Over 60 groups now using it as a standard The standard is driving faster adoption Common integration technology for Fusion Apps Core technology for Oracle's cloud stack
  10. 10. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | 10 Why should you care about REST web services? Over 60 groups now using it as a standard The standard is driving faster adoption Common integration technology for Fusion Apps Core technology for Oracle's cloud stack Defacto development solution for web/JS, mobile etc Huge uptake across vendors, open source, IT industry Common language for integration solutions Available wherever the web is available
  11. 11. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | No Really?! Why should I care about REST? 11
  12. 12. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | No Really?! Why should I care about REST? 12 // Javascript var xhr = new XMLHttpRequest(); xhr.onreadystatechange = function() { if (xhr.readyState == 4) { var data = xhr.responseText; doSomething(data); } } xhr.open('GET', 'https://myhost/myapp/orders/1001’, true); xhr.send(null); // Java DefaultHttpClient httpClient = new DefaultHttpClient(); HttpGet getRequest = new HttpGet("https://myhost/myapp/orders/1001"); HttpResponse response = httpClient.execute(getRequest); BufferedReader br = new BufferedReader( new InputStreamReader((response.getEntity().getContent()))); // jquery $.getJSON( "https://myhost/myapp/orders/1001", function( data ) { doSomething(data); }); // Php <?php $url = 'http://myhost/myapp/orders/1001'; $response = file_get_contents($url); $data = json_decode($response); var_dump($data); ?> // Ruby require 'json' require 'net/http’ url = 'http://whatever/service' response = Net::HTTP.get_response(URI.parse(url)) data = JSON.parse(response.body) print data // Python import json import requests url = 'http://myhost/myapp/orders/1001' response = requests.get(url) data = response.json() print data // Android DefaultHttpClient httpClient = new DefaultHttpClient(); HttpGet getRequest = new HttpGet("https://myhost/myapp/orders/1001"); HttpResponse response = httpClient.execute(getRequest); BufferedReader br = new BufferedReader( new InputStreamReader((response.getEntity().getContent())));
  13. 13. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | 13 Exam Question 1 Describe the core concepts of REST web services. Exam Question 2 Explain REST web services using pictures.
  14. 14. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | http://cloud.oracle.com/mobile/index.html Understanding REST: You are already an expert Everyday you use a browser And you enter URLs to "GET" a "resource" A URL is comprised of a remote server A path And a web page "resource" of a specific "media type"
  15. 15. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | http://cloud.oracle.com/mobile/index.html It's not a human accessing the resource, it's software
  16. 16. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | http://cloud.oracle.com/mobile/index.html And their accessing a remote service It doesn't have to be web pages, it can be any file (media type) It's not a human accessing the resource, it's software
  17. 17. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | http://cloud.oracle.com/mobile/index.html HTTP Request HTTP Response And they utilize the HTTP protocol The client makes a HTTP request The server responds There can be many request-response cycles
  18. 18. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | http://cloud.oracle.com/mobile/index.html Request Response HTTP Request The HTTP request carries a payload
  19. 19. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | HTTP Request GET /mobile/index.html HTTP/1.1 Host: cloud.oracle.com User-Agent: Mozilla/5.0 Chrome/3.6 Accept: text/html Accept-Language: en-us Accept-Encoding: gzip,deflate Accept-Charset: utf-8 Keep-Alive: 115 Connection: keep-alive
  20. 20. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | HTTP Request GET /mobile/index.html HTTP/1.1 Host: cloud.oracle.com User-Agent: Mozilla/5.0 Chrome/3.6 Accept: text/html Accept-Language: en-us Accept-Encoding: gzip,deflate Accept-Charset: utf-8 Keep-Alive: 115 Connection: keep-alive HTTP
  21. 21. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | HTTP Request GET /mobile/index.html HTTP/1.1 Host: cloud.oracle.com User-Agent: Mozilla/5.0 Chrome/3.6 Accept: text/html Accept-Language: en-us Accept-Encoding: gzip,deflate Accept-Charset: utf-8 Keep-Alive: 115 Connection: keep-alive HTTP HTTP Verb: GET/HEAD/PUT /POST/DELETE
  22. 22. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | HTTP Request GET /mobile/index.html HTTP/1.1 Host: cloud.oracle.com User-Agent: Mozilla/5.0 Chrome/3.6 Accept: text/html Accept-Language: en-us Accept-Encoding: gzip,deflate Accept-Charset: utf-8 Keep-Alive: 115 Connection: keep-alive HTTP HTTP Verb: GET/HEAD/PUT /POST/DELETE URI: Server
  23. 23. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | HTTP Request GET /mobile/index.html HTTP/1.1 Host: cloud.oracle.com User-Agent: Mozilla/5.0 Chrome/3.6 Accept: text/html Accept-Language: en-us Accept-Encoding: gzip,deflate Accept-Charset: utf-8 Keep-Alive: 115 Connection: keep-alive HTTP HTTP Verb: GET/HEAD/PUT /POST/DELETE URI: Server URI: Path + Resource
  24. 24. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | HTTP Request GET /mobile/index.html HTTP/1.1 Host: cloud.oracle.com User-Agent: Mozilla/5.0 Chrome/3.6 Accept: text/html Accept-Language: en-us Accept-Encoding: gzip,deflate Accept-Charset: utf-8 Keep-Alive: 115 Connection: keep-alive HTTP HTTP Verb: GET/HEAD/PUT /POST/DELETE URI: Server URI: Path + Resource HTTP Headers
  25. 25. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | HTTP Request GET /mobile/index.html HTTP/1.1 Host: cloud.oracle.com User-Agent: Mozilla/5.0 Chrome/3.6 Accept: text/html Accept-Language: en-us Accept-Encoding: gzip,deflate Accept-Charset: utf-8 Keep-Alive: 115 Connection: keep-alive HTTP HTTP Verb: GET/HEAD/PUT /POST/DELETE URI: Server URI: Path + Resource HTTP Headers Accept
  26. 26. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | HTTP Request GET /mobile/index.html HTTP/1.1 Host: cloud.oracle.com User-Agent: Mozilla/5.0 Chrome/3.6 Accept: text/html Accept-Language: en-us Accept-Encoding: gzip,deflate Accept-Charset: utf-8 Keep-Alive: 115 Connection: keep-alive HTTP HTTP Verb: GET/HEAD/PUT /POST/DELETE URI: Server URI: Path + Resource HTTP Headers Accept No body
  27. 27. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | http://cloud.oracle.com/mobile/index.html Request Response HTTP Response
  28. 28. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | http://cloud.oracle.com/mobile/data.json Request Response HTTP Response HTTP/1.1 200 OK Date: 26 Jan 2015 00:02:25 GMT Server: Apache/2.0.55 (Ubuntu) Connection: Keep-Alive Etag: "1a690fe-40df-f1645340" <html> <head> <title>Oracle MCS</title> </head> ..etc..
  29. 29. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | http://cloud.oracle.com/mobile/data.json Request Response HTTP Response HTTP/1.1 200 OK Date: 26 Jan 2015 00:02:25 GMT Server: Apache/2.0.55 (Ubuntu) Connection: Keep-Alive Etag: "1a690fe-40df-f1645340" <html> <head> <title>Oracle MCS</title> </head> ..etc.. Status Code
  30. 30. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | http://cloud.oracle.com/mobile/data.json Request Response HTTP Response HTTP/1.1 200 OK Date: 26 Jan 2015 00:02:25 GMT Server: Apache/2.0.55 (Ubuntu) Connection: Keep-Alive Etag: "1a690fe-40df-f1645340" <html> <head> <title>Oracle MCS</title> </head> ..etc.. Payload Status Code
  31. 31. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Understanding REST: The four slide introduction • Resources • HTTP verbs • Status codes • Media types http://host/path/departmentsGET http://host/path/employeesGET http://host/path/departments/hrGET http://host/path/employees/101GET http://host/path/departments/hr/employeesGET
  32. 32. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Understanding REST: The four slide introduction • Resources • HTTP verbs • Status codes • Media types DELETE PUT HEAD GET POST 'Read' a resource 'Create' a resource 'Update or Create' 'Delete' a resource 'Read' resource headers
  33. 33. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Understanding REST: The four slide introduction • Resources • HTTP verbs • Status codes • Media types Informational Success Redirection Client Error Server Error 4xx 3xx 5xx 1xx 2xx
  34. 34. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Understanding REST: The four slide introduction • Resources • HTTP verbs • Status codes • Media types Payload type 'requested' by client – Via HTTP Parameter "accept" – Defines MIME types. e.g. • application/json, application/xml, image/gif {"departments: [ {"id":"MAN","name":"Manfacturing"}, {"id":"HR","name":"Human Resources"}, {"id":"FIN","name":"Finance"}, ...etc... ]}
  35. 35. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Understanding JSON: The three slide introduction JSON is a standard using human-readable text to transmit data objects of attribute-value pairs. It is typically used in machine to machine communications and is a contemporary replacement for the older XML standard. - Wikipedia { "firstName":"John", "lastName":"Smith", "isAlive":true, "age":25, "address": { "streetAddress":"21 2nd Street", "city":"New York", "state":"NY", "postalCode":"10021-3100" }, "phoneNumbers": [ {"type":"home", "number":"1234"}, {"type":"office","number":"4567"} ], "children":[], "spouse":null }
  36. 36. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | • Textual data payloads • Human readable • Supports validation & schemas • "Fat free" alternative to XML • Compact mobile friendly payloads • JavaScript has inbuilt support Understanding JSON: The three slide introduction { "firstName":"John", "lastName":"Smith", "isAlive":true, "age":25, "address": { "streetAddress":"21 2nd Street", "city":"New York", "state":"NY", "postalCode":"10021-3100" }, "phoneNumbers": [ {"type":"home", "number":"1234"}, {"type":"office","number":"4567"} ], "children":[], "spouse":null }
  37. 37. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | { "firstName":"John", "lastName":"Smith", "isAlive":true, "age":25, "address": { "streetAddress":"21 2nd Street", "city":"New York", "state":"NY", "postalCode":"10021-3100" }, "phoneNumbers": [ {"type":"home", "number":"1234"}, {"type":"office","number":"4567"} ], "children":[], "spouse":null } • Blocks delineated by ellipses • Key-value pairs, separated by colon – Key with quotes – Strings & dates with quotes – Boolean, integers, null without quotes – Supports nesting of records – Supports arrays/collections – Empty array – Null values • Elements are comma delimited Understanding JSON: The three slide introduction
  38. 38. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | 38 Why?Congratulations! You're now a REST expert I feel kind of… icky
  39. 39. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Program Agenda REST & JSON Overview Oracle REST Data Services Overview Demonstration 1 2 3 39
  40. 40. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. |  Provides external data access via HTTP  For modern development frameworks  REST is contemporary choice for  JavaScript (web), mobile, cloud solutions  Maps standard HTTP/S RESTful calls to SQL  Declaratively returns results in JSON format  Supports high number of end users 40 Oracle REST Data Services (ORDS)
  41. 41. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | 41 Release History Version Date Description 1.0 2010 First release as Oracle APEX Listener with with support for OWA toolkit used by APEX 1.1 2011 First release with REST support for JSON, Microdata, CSV, Pagination. Also added FOP 2.0 2012 OAuth2 support, Integrated with APEX, Multi Database, SQL Developer integration 2.0.5 2013 Added PDB support 2.0.6 2014 Renamed to Oracle REST Data Services to emphasize REST commitment 2.0.8 2014 Added REST Filtering 3.0 2015 REST AutoTable, NoSQL, DB12 JSON, Bulk loading over REST,…
  42. 42. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Oracle DatabaseHTTP/S client Oracle REST Data Services Transform
  43. 43. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Oracle DatabaseHTTP/S client Oracle REST Data Services Transform ORDS runs in any Java EE container: e.g. WLS, Tomcat, Glassfish HTTP/S Enhanced version of the Oracle Java mod_plsql Apache module There’s also a standalone version for dev purposes It comes by default with Oracle DBaaS
  44. 44. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Oracle DatabaseHTTP/S client Oracle REST Data Services Transform HTTP/S https://myhost/myapp/sales/orders/1001 HTTP/S & URI Module Template Client makes a HTTP 'GET' request Context Root
  45. 45. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Oracle DatabaseHTTP/S client Oracle REST Data Services Transform https://myhost/myapp/sales/orders/1001 HTTP/S & URI Module Template ORDS maps to "ORDERS" SQL Context Root Map and Bind SELECT * FROM ORDERS WHERE ORDERNO = :b1 HTTP/S
  46. 46. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Oracle DatabaseHTTP/S client Oracle REST Data Services Transform https://myhost/myapp/sales/orders/1001 HTTP/S & URI Module Template JDBC SQL Call Context Root SELECT * FROM ORDERS WHERE ORDERNO = :b1 SQLMap and BindHTTP/S
  47. 47. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Oracle DatabaseHTTP/S client Oracle REST Data Services Transform https://myhost/myapp/sales/orders/1001 HTTP/S & URI Module TemplateContext Root SELECT * FROM ORDERS WHERE ORDERNO = :b1 SQLMap and Bind Result Set DB returns result set HTTP/S
  48. 48. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Oracle DatabaseHTTP/S client Oracle REST Data Services Transform https://myhost/myapp/sales/orders/1001 HTTP/S & URI Module TemplateContext Root SELECT * FROM ORDERS WHERE ORDERNO = :b1 SQLMap and Bind Transform Result Set { "orderno": 1001, "name": "Scott King", "address": "500 Main street, Innovation CA", "items": [ { "itemno": 404, "quantity": 7, "status": "in process"}, { "itemno": 303, "quantity": 32, "status": "closed"} ] } HTTP/S Transform to JSON, CSV, Excel or Binary
  49. 49. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Oracle DatabaseHTTP/S client Oracle REST Data Services Transform https://myhost/myapp/sales/orders/1001 HTTP/S & URI Module TemplateContext Root SELECT * FROM ORDERS WHERE ORDERNO = :b1 SQLMap and Bind { "orderno": 1001, "name": "Scott King", "address": "500 Main street, Innovation CA", "items": [ { "itemno": 404, "quantity": 7, "status": "in process"}, { "itemno": 303, "quantity": 32, "status": "closed"} ] } JSON HTTP/S Response to HTTP request Transform Result Set
  50. 50. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Summary: Serving JSON results from the database  App developers call named URI over HTTP(S) to retrieve and update data  Oracle REST Data Services (ORDS) Developer defines URI<>SQL mapping/binding  Utilizes the data stored in standard relational tables and columns Oracle Database HTTP/S HTTP/S client Map and Bind SQL Transform Result SetJSON Oracle REST Data Services Transform
  51. 51. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Program Agenda REST & JSON Overview Oracle REST Data Services Overview Demonstration 1 2 3 51
  52. 52. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | 52 http://bit.ly/letstalkoracle001
  53. 53. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | 53
  54. 54. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Installing ORDS support in the Database • Several routes: 1. Scripts 2. APEX 3. SQL Developer 54
  55. 55. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | 55
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  74. 74. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Enabling ORDS support in the Database • Several routes: 1. PL/SQL APIs 2. APEX 3. SQL Developer 74
  75. 75. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Enabling AutoREST Support 75
  76. 76. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | 76
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  91. 91. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | • Add as ?q=<filter> • Ensure to escape the filter • Operators – $eq,$gt,$lt,$lte,$gte, – $ne,$instr,$asof • Logical – $and, $or • Examples: ?q={ "qty": { "$gt": 20 } } ?q={"$and": [{"price": {"$ne": 1.99}},{"price": {"$notnull": ""}}] ?q={"price": [{"$ne": 1.99}},{"$notnull": ""}] ?q={"$or": [{"qty": {"$lt": 20}},{"sale": {"$eq": "TRUE"}}] ?q={$asof: {"$timestamp": ”……"}} Generic Filtering via URI Query Support
  92. 92. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Configuring Modules & Templates 92
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  116. 116. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | 116 For you to understand Common IT language Unlock your IT silos Unlock your data Data is a key asset Drive the business Consider the API world Consider Microservices Overall REST should be a key technology for:
  117. 117. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | 117 JSON inside the db PL/JSON, APEX_JSON.. REST & JSON out of the db Node.js DB Driver, ORDS.. ….#cough #cough and just about every middleware product #hint #hint. Don't forget the alternatives:
  118. 118. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | Learn More With Gordon Smith 118 http://bit.ly/letstalkoracle003
  119. 119. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. | 119

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