Grails(2)Clinic Sample and Guide Book
Grails(2)ClinicSampleandGuideBook
Findthemostrecentsamplefromhere:
https://github.com/grails-samples/grails-petclinic.git
>gitclonehttps://github.com/grails-samples/grails-petclinic.git
ImporttheprojectintomySTS,installthelatestgrailsonMAC
>sudoportinstallgrails
Followthedocumentandrunthesamplefirst
>grailswrun-app
ThenIcanvisitthesamplewebpagefromthisURLhttp://localhost:8080/petclinic.
IcanalsousemySTSwebcontainertorunthiswebproject.Itisalsoworking.Iwillgothisprojectindetails.
1.PetClinicApplicationOverview
ItisbuiltonalreadyestablishedJavatechnologylikeSpring&Hibernate.
ObjectRelationalMapping(ORM)onHibernate
ViewtechnologycalledGroovyServerPages(GSP)
SpringMVCandetc
H2isthedefaultdatabaseusedbyGrails.
PetClinicApplicationDesign
Logging
http://grails.org/doc/latest/guide/conf.html#logging
grails-app/Config.groovy
BusinessLayer
org.grails.samples.Speciality
org.grails.samples.PetType
org.grails.samples.Person
org.grails.samples.Vet
org.grails.samples.Owner
org.grails.samples.Pet
org.grails.samples.Visit
LogicalViews&ImplementedUseCases
grails-app/views/clinic/index.gsphome
grails-app/views/clinic/vets.gspvetsandspecialties
grails-app/views/owner/find.gsp
grails-app/views/owner/selection.gspselecttheusersfromthesamelastname
grails-app/views/owner/show.gsp
grails-app/views/owner/add.gsp
grails-app/views/pet/add.gsp
grails-app/views/pet/addVisit.gsp
grails-app/views/common/_formField.gspAtemplateusedtorendercommonmarkup
grails-app/views/layouts/main.gspThelayoutusedtoincludecommonCSSandmarkup
Testingtestthecontrollerlayer.
Duringreadingthesample,hereisforlookinguphttp://grails.org/doc/latest/guide/index.html.
MakeasampleprojectDudeMoneyMaster
2.GettingStarted
IsuccessfullyinstalledgrailsonmyMACandusedtheIDESTS.
>grailsrun-app
>grailstest-app
>grailswar
4.Configuration
4.1BasicConfiguration
grails-app/conf/BuildConfig.groovy
grails-app/conf/Config.groovy
Theconfigurationhassomebenefits:
1.Canbemerged
2.Canbewrittentodisk
3.Converttojavaproperties,convertfromjavaproperties
4.thecontentcanbestructured
5.Canselecttheenvironment
defconfig=newConfigSlurper("development").parse(newFile('Sample.groovy').toURL())
config=newConfigSlurper("test").parse(newFile('Sample.groovy').toURL())
BuildConfig.groovyisusedforcompile,docandetc.
Config.groovyisforsettingsthatareusedwhentheapplicationisrunning.
SotheConfig.groovyispackagedinwar,BuildConfig.groovyisnot.
foo.bar.hello="world"
Itisimporttohavethequotes.ThepropertyvaluescanbeanyvalidGroovytype,strings,integers,orarbitraryobjects.
Someimplicitvariablescannotbeused:
userHomehomedirectoryfortheaccountthatisrunningthegrails
grailsHome
appNameapplicationnameasitappearsinapplication.properties
appVersionversioninapplication.properties
BuildConfig.groovyisonlyavailablefromcommandscriptviagrailsSettings.config
Config.groovyisviagrailsApplicationincontrollers
defrecipient=grailsApplication.config.foo.bar.hello
Anditcanbeeasilyinjectedintoservices.
classMyService{
defgrailsApplication
Stringgreeting(){
defrecipient=grailsApplication.config.foo.bar.hello
…snip...
}
}
4.1.1Builtinoptions
RuntimeSettings
grails.config.locationThelocationofpropertiesfilescanbesettootherclasspathoruserHomeplace.
http://grails.org/doc/latest/guide/single.html#configExternalized
grails.war.dependenciesManagethejarsinwar.
4.1.2Logging
TheBasics
log4jsettinginConfig.groovy
LoggingLevels
1.off
2.fatal
3.error
4.warn
5.info
6.debug
7.trace
8.all
Loggers
classMyClass{
privatestaticfinallog=LogFactory.getLog(this)
…snip…
}
TheRootLogger
log4j={
appenders{
filename:'file',file:'/var/logs/mylog.log'
}
root{
debug'stdout','file'
}
}
Therootloggerwilllogto2appenders.Thedefault'stdout'(console)apppenderandfileappender.
Thesearethedefaultavailableappenders.
jdbcJDBCAppender
consoleConsoleAppender
fileFileAppender
rollingFileRollingFileAppender
Environment-specificconfiguration
//othersharedconfig
info"grails.app.controller"
environments{
production{
//Overrideprevioussettingfor'grails.app.controller'
error"grails.app.controllers"
}
}
4.1.3GORM
grails.gorm.failOnError=true
grails.gorm.autoFlush=true
4.2Environments
PerEnvironmentConfiguration
dataSource{
pooled=false
driverClassname="org.h2.Driver"
username="sa"
password=""
}
environments{
development{
dataSource{
dbCreate="create-drop"
url="jdbc:h2:mem:devDb"
}
}
test{
dataSource{
dbCreate="update"
url="jdbc:h2:mem:testDb"
}
}
production{
dataSource{
dbCreate="update"
url="jdbc:h2:prodDb"
}
}
}PackagingandRunningforDifferentEnvironments
>grails[envrionment][commandname]
references:
http://www.grails.org/tutorials?offset=0&max=10
https://github.com/grails-samples
http://grails.org/doc/latest/guide/index.html
http://grails.org/doc/latest/guide/conf.html