Japanese Configuration

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{excerpt:hidden=true}Programmatic start-up configuration can be added a Grails application by creating one or many "BootStrap" classes in the "%PROJECT_HOME%grails-appconf" directory: {excerpt} Grails?????????????????????????????"BootStrap"????"%PROJECT_HOME%grails-appconf"???????????????????????

class ExampleBootStrap {     def init = { servletContext ->
         // init app
     }
     def destroy = {
         // destroy app
     }
}

{excerpt:hidden=true}The "init" closure (if it exists) is called on application load and the "destroy" closure (again if it exists) on application exit {excerpt} "init"???????(?????)?????????"destroy"???????(?????)????????????

It is not guaranteed that destroy will be called unless the application exits gracefully (for example by using the application server's shutdown command) so don't rely on it too much

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{excerpt:hidden=true}There are two alternatives when it comes to configuring DataSources for Grails (effective Grails 0.3) {excerpt} Grails?????????????2??????????(Grails 0.3?????){excerpt:hidden=true}

Use the JDBC DataSource by defining (test/dev/prod) DataSource under grails-app/conf folder
Use JNDI dataSource in the spring/resources.xml folder  of the application. Normally you would use this if you want to re-use the existing dataSource settings of the J2EE Server you are running your Grails application on.{excerpt}
grails-app/conf????????(test/dev/prod) DataSource?????JDBC????????????
?????????spring/resources.xml??JNDI dataSource??????Grails???????????????J2EE??????????????????????????

grails-app/conf?????????????????? {excerpt:hidden=true}Specifying DataSource in the grails-app/conf folder  {excerpt}

{excerpt:hidden=true}Data source names should end with "DataSource". If no (available) data sources are found Grails will start with an in-memory HSQLDB database with the database schema created at run-time. There are four required String properties: {excerpt} ?????????"DataSource"????????????????????????????????????????????HSQLDB?????????????????????????????

url - ????????JDBC url
driverClassName - JDBC?????????
username - ????
password - ?????

class HsqlDataSource {
   String dbCreate = "update"
   String url = "jdbc:hsqldb:hsql://localhost"
   String driverClassName = "org.hsqldb.jdbcDriver"
   String username = "sa"
   String password = ""
}

?? {excerpt:hidden=true}Environments {excerpt}

{excerpt:hidden=true}By default Grails creates 3 data sources called {{DevelopmentDataSource}} , {{ProductionDataSource}} and {{TestDataSource}}. These can be adapted to each target environment. When you run Grails you can then tell it what data source to use when specifying the environment: {excerpt} Grails???????? {{DevelopmentDataSource}} , {{ProductionDataSource}} , {{TestDataSource}} ???????????????????????????????????????????????Grails??????????????????????????? {excerpt:hidden=true}

code: null
grails run-app // ??????????????"development"?????? runs with the default "development" data source
grails dev run-app // "development"????????? runs with the "development" data source
grails prod run-app // production????????? runs with the production data source
grails test run-app // test????????? runs with the test data source
code: null{excerpt}
grails run-app // ??????????????"development"??????
grails dev run-app // "development"?????????
grails prod run-app // production?????????
grails test run-app // test?????????{excerpt:hidden=true}These options are also available when packaging the application as a WAR file, although in this case the default data source used is _production_: {excerpt}
??WAR???????????????????????????????????????????????? production ????????????????????: {excerpt:hidden=true}
code: null
grails war  // "production"????????????????????? Packages the application with the "production" data source
grails dev war   // "development"????????????????????? Packages the application with the "development" data source
grails prod war  // "production"????????????????????? Packages the application with the "production" data source
code: null{excerpt}
grails war  // "production"?????????????????????
grails dev war   // "development"?????????????????????
grails prod war  // "production"?????????????????????{excerpt:hidden=true}If you have other environments you need to target you can create another data source that follows the convention. For example {{BookDataSource}} and then start Grails app as follows: {excerpt}
??????????????????????????????????????????????{{BookDataSource}} ????????????????????????
grails -Dgrails.env=book run-app
???????????? {excerpt:hidden=true}Connection Pooling {excerpt}
{excerpt:hidden=true}By default org.apache.commons.dbcp.BasicDataSource is used, all of its properties can be added to data source classes. If you want to disable connection pooling create a "pooling" property and set it to false. This will use org.springframework.jdbc.datasource.DriverManagerDataSource instead. Properties configured on Grails data sources that are not supported by DriverManagerDataSource will silently be ignored. {excerpt}
????????org.apache.commons.dbcp.BasicDataSource ???????????????????????????????????????????????????????????"pooling"??? ???????false?????????????? org.springframework.jdbc.datasource.DriverManagerDataSource??????? DriverManagerDataSource?????????????????????????????
boolean pooling = false
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{excerpt:hidden=true}By default Grails is configured to attempt to update or create the database on application load this is configured with the "dbCreate" property: {excerpt}
Grails????????????????????"dbCreate"????????????????????????????????????????????
String dbCreate= "update"{excerpt:hidden=true}If this property is removed the database will have to be created manually or by a separate process. Other possible values for this property are "create" and "create-drop". {excerpt}
??????????????????????????????????????????????????????????"create" ? "create-drop"???
SQL????
{excerpt:hidden=true}To enable SQL logging in your grails application add the following property to the Grails data source file: {excerpt}
Grails?????????SQL???????????????????????????????
def logSql = true
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{excerpt:hidden=true}To set a custom dialect for Hibernate to use add a 'dialect' property to the data source referencing the dialect class to use: {excerpt}
Hibernate??????????????????????'dialect'????????????????????????????????????
def dialect = MySQLDialect.class
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{excerpt:hidden=true}Grails GORM is based on the Hibernate object/relational mapping framework. Therefore
Grails supports all Hibernate databases. {excerpt}
Grails GORM? Hibernate ??????/??????? ????? ???????????????????Hibernate?????????????????????????????Hibernate is regularly tested with the following SQL databases:

DB2 7.1, 7.2, 8.1
HSQL DB
HypersonicSQL 1.61, 1.7.0, 1.7.2, 1.8
Microsoft SQL Server 2000
MySQL 3.23, 4.0, 4.1, 5.0
Oracle 8i, 9i, 10g
PostgreSQL 7.1.2, 7.2, 7.3, 7.4, 8.0, 8.1
SAP DB 7.3
Sybase 12.5 (JConnect 5.5)
Timesten 5.1
Hibernate has also been tested with and is believed to be compatible with current versions of:

Apache Derby
HP NonStop SQL/MX 2.0 (requires Dialect from HP)
Firebird (1.5 with JayBird 1.01 tested)
FrontBase
Informix
Ingres
Interbase (6.0.1 tested)
Mckoi SQL
Pointbase Embedded (4.3 tested)
Progress 9
MySQL???
{excerpt:hidden=true} Download the Java MySQL driver from: {excerpt}
????MySQL?Java?????????????
http://www.mysql.com/products/connector/j/ {excerpt:hidden=true}Unpack the archive and copy the mysql*.jar (not the debug jar) to lib
in your grails application directory. {excerpt}
??????????Grails????????? lib???????mysql*.jar(debug?jar??)???? {excerpt:hidden=true}Change the ApplicationDataSource to using your own values: {excerpt}
ApplicationDataSource??????????
class ApplicationDataSource {
    boolean pooling = true
    String dbCreate = "create-drop"
    String url = "jdbc:mysql://localhost/yourDB"
    String driverClassName = "com.mysql.jdbc.Driver"
    String username = "yourUser"
    String password = "yourPassword"
}
spring/resources.xml????JNDI????????{excerpt:hidden=true}Using JNDI DataSources through spring/resources.xml{excerpt}
&nbsp;?????????????J2EE??????JNDI??????????????????????????????????????
??"org.springframework.jndi.JndiObjectFactoryBean"????????"dataSource"??????????????Grails?grails-app/conf/??????????????????????{excerpt:hidden=true} &nbsp;Normally you would use this approach if running inside a J2EE server which has its own JNDI entries for the Database already set up, so you could re-use the connection settings. If there is a bean by name "dataSource" with class "org.springframework.jndi.JndiObjectFactoryBean", Grails runtime would take this entry instead of the grails-app/conf/ datasources.{excerpt}
???resources.xml????dataSource????????????????jndiName?????????????????{excerpt:hidden=true} An example entry for dataSource bean in the resources.xml would be as following. Of course you have to change the property jndiName's value appropriately. {excerpt}
<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="jdbc/myDataSource" />
</bean>
{excerpt:hidden=true}Note: This feature is available since Grails 0.3 (see http://jira.codehaus.org/browse/GRAILS-272){excerpt}
Note: ?????Grails0.3??????????(http://jira.codehaus.org/browse/GRAILS-272??)h2.
        
    

    
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Japanese Configuration

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grails-app/conf?????????????????? {excerpt:hidden=true}Specifying DataSource in the grails-app/conf folder&nbsp; {excerpt}

?? {excerpt:hidden=true}Environments {excerpt}

???????????? {excerpt:hidden=true}Connection Pooling {excerpt}

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SQL????

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MySQL???

spring/resources.xml????JNDI????????{excerpt:hidden=true}Using JNDI DataSources through spring/resources.xml{excerpt}

grails-app/conf?????????????????? {excerpt:hidden=true}Specifying DataSource in the grails-app/conf folder {excerpt}