Groovy & Grails 2.x update. Björn Beskow

Transcription

1 Björn Beskow

2 Agenda What s new in Groovy 2? What s new in Grails 2.2? Grails Advanced Enterprise IntegraJons through examples 2

3 Groovy Groovy is a dynamic language on and for the JVM Fully interoperable with Java at all levels Goal is to greatly simplify the life for developers Release 2.0.6, December 2012 (started in 2004) 3

4 Grails Full Stack, Full Produc7vity MVC Framework Built on a solid, well- known founda7on Spring, Hibernate, Sitemesh ConvenJons and defaults everywhere Release 2.2.0, December 2012 (started mid 2005) 4

5 Protect investment in the JavaEE platform ExisJng applicajons ExisJng APIs ExisJng 3rd party components ExisJng competence JDBC JNDI 5

6 Groovy & Grails 1.x, 2011: What was the problem? 6

7 Groovy 1.x, 2011: What was the problem? Dynamic languagues are scary! Dynamic languages are slow! 7

8 Grails 1.x, 2011: What was the problem? Immature Development environment Bad IDE support Bad build system support PrimiJve dependency management 8

9 Grails 1.x, 2011: What was the problem? Not well suited for test- driven development Old- school unit test framework Long round- trip startup Jme 9

10 Grails 1.x, 2011: What was the problem? Immature plugins 10

11 ... but things change... 11

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21 Groovy, anno

22 Groovy AST transformations Also known as 22

23 = true) class MyClass {} MyClass.instance.someMethod() 23

24 AST class Person List dnaprofile = { /* complex computation */ } } 24

25 final class Coordinates { Double latitude, longitude } 25

26 AST class Event Date when } def cadec = new Event( ) def javaone = new Event( ) assert cadec.before(javaone.when) 26

27 class Employee { Employee() { log.info("employee created") } } 27

28 class Employee { String firstname String lastname Assignment assignment } 28

29 class Employee { String firstname String lastname } def e = new Employee(firstName: Björn,lastName: Beskow ) assert e.tostring == "Employee(Björn, Beskow)" 29

30 class Employee { String firstname String lastname Assignment assignment } 30

31 class EmployeeException extends Exception { EmployeeException(Assignment a) {..} } 31

32 class NumberCategory { Distance getmeters() { new Distance(number: this) } } use(numbercategory) { } def dist = 300.meters 32

33 AST Best of two worlds: Brings Sta$c Typing into the dynamic world of Groovy Compiler performs sophisjcated type inference 33

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35 AST One step further: Sta.cally compile a class or block of code, which makes the bytecode (almost) idenjcal to corresponding compiled Java code, with iden.cal performance Can prevent dynamic behavior to be inadvertently applied to a block of code (a.k.a. Monkey Patching ) 35

36 Grails, anno

37 Grails, anno 2013 IDE support that finally works Many high quality enterprise- grade plugins available Grails 2.2 Agent- based class reloading and interacjve console NaJve Maven support NoSQL database support DB MigraJons Cloud Deployments 37

38 IDE support 38

39 Maven integration & dependency mgmt. 39

40 TDD support 40

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42 Grails: The Power of Convention Controller Service View Domain Class 42

43 Grails Plugins Grails Plugins turn Grails into an extensible pla4orm Exposes well- defined extension points Low ceremony format makes wrijng plugins trivial AcJve community, with well over 800 plugins available 43

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45 Plugins in action! DB migrajons with Liquibase Cloud deployment to Cloud Foundry MongoDB integrajon Db- backed message translajons Ajax- based Compass/Lucene search LDAP- based authorizajon Audit logging ApplicaJon monitoring Quartz integrajon Mail integrajon JMS integrajon Spring RemoJng with rich clients RESTful web services SOAP web services 45

46 Quiz: How many lines of code? 30 lines? 75 lines? 150 lines? 750 lines? 46

47 Database migrations 47

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49 One- click Cloud Deployment 49

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51 NoSQL Database support 51

52 NoSQL Database support 52

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54 I18n 54

55 I18n 55

56 I18n 56

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58 Searching 58

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60 Ajax- based incremental searching 60

61 Authentication 61

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63 Audit Logging 63

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65 Monitoring 65

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67 Scheduling 67

68 Scheduling 68

69 Scheduling 69

70 Mail 70

71 Mail 71

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73 JMS 73

74 JMS 74

75 JMS 75

76 JMS 76

77 Remoting 77

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79 Restful Web Services 79

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81 Restful Web Services 81

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83 SOAP Web Services 83

84 SOAP Web Services 84

85 Plugins used (grails.org/plugins) build- test- data fixtures auto- test database- migrajon cloud- foundry mongodb searchable localizajons spring- security- core, spring- security- ldap audit- logging app- info, app- info- hibernate quartz, quartz- monitor mail jms remojng json- rest- api axis2 85

86 Quiz: How many lines of code? MigraJons: 1 line CloudForge deploy: 1 line MongoDB: 2 lines I18n: 1 line Searching: 2 lines Ajax- based search: 16 lines LDAP auth: 5 Audit logging: 2 lines AppServer monitoring: 2 lines Quartz scheduling: 11 lines SMTP mail: 6 lines JMS sender: 7 lines JMS message- driven service: 9 lines RemoJng: 2 lines Rest- API: 2 lines Rest- based controller: 4 lines Axis2 service: 2 line Total: 75 lines 86

87 Conclusions Groovy & Grails provides an extremely producjve extension to Java & JavaEE Many shortcomings in the tooling and plugins pornolio have been addressed recently remains to be seen if it is enough to lead to more general adopjon 87

88 Questions 88