在 Grails 3.x 中安装和使用 MongoDB
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【中文标题】在 Grails 3.x 中安装和使用 MongoDB【英文标题】：Installing and using MongoDB in Grails 3.x 【发布时间】：2015-10-20 20:50:44 【问题描述】：我一直在关注 Manning 的 Grails In Action，但是他们关于配置数据源的部分对于 Grails 3.0.3 来说已经过时了。
我的意图是从 H2 的默认数据源转换为 MongoDB 版本 3.0.2。谷歌搜索产生了相互矛盾的结果——许多答案通常是针对早期版本的 Grails，它使用“BuildConfig.groovy”和“DataSources.groovy”来建立插件和数据源。
我已下载 the 3.0.2 JDBC for MongoDB 并将其存储在各种文件夹中（即应用程序的根目录、创建的 /lib/ 文件夹和 /grails-app/conf/ 中），但均未成功。
我的 application.yml 文件内容如下：
---
grails:
profile: web
codegen:
defaultPackage: qotd
info:
app:
name: '@info.app.name@'
version: '@info.app.version@'
grailsVersion: '@info.app.grailsVersion@'
spring:
groovy:
template:
check-template-location: false
---
grails:
mime:
disable:
accept:
header:
userAgents:
- Gecko
- WebKit
- Presto
- Trident
types:
all: '*/*'
atom: application/atom+xml
css: text/css
csv: text/csv
form: application/x-www-form-urlencoded
html:
- text/html
- application/xhtml+xml
js: text/javascript
json:
- application/json
- text/json
multipartForm: multipart/form-data
rss: application/rss+xml
text: text/plain
hal:
- application/hal+json
- application/hal+xml
xml:
- text/xml
- application/xml
urlmapping:
cache:
maxsize: 1000
controllers:
defaultScope: singleton
converters:
encoding: UTF-8
views:
default:
codec: html
gsp:
encoding: UTF-8
htmlcodec: xml
codecs:
expression: html
scriptlets: html
taglib: none
staticparts: none
---
hibernate:
cache:
queries: false
use_second_level_cache: true
use_query_cache: false
region.factory_class: 'org.hibernate.cache.ehcache.EhCacheRegionFactory'
dataSource:
pooled: true
jmxExport: true
host: 'localhost'
port: 27017
driverClassName: mongodb-driver-3.0.2.jar
databaseName: 'test_db'
environments:
development:
dataSource:
dbCreate: create
url: jdbc:mongodb://localhost:27017
test:
dataSource:
dbCreate: update
url: jdbc:mongodb://localhost:27017
production:
dataSource:
dbCreate: update
url: jdbc:mongodb://localhost:27017
properties:
jmxEnabled: true
initialSize: 5
maxActive: 50
minIdle: 5
maxIdle: 25
maxWait: 10000
maxAge: 600000
timeBetweenEvictionRunsMillis: 5000
minEvictableIdleTimeMillis: 60000
validationQuery: SELECT 1
validationQueryTimeout: 3
validationInterval: 15000
testOnBorrow: true
testWhileIdle: true
testOnReturn: false
jdbcInterceptors: ConnectionState
defaultTransactionIsolation: 2 # TRANSACTION_READ_COMMITTED
我的 build.gradle 文件内容如下：
buildscript
ext
grailsVersion = project.grailsVersion
repositories
mavenLocal()
maven url "https://repo.grails.org/grails/core"
dependencies
classpath "org.grails:grails-gradle-plugin:$grailsVersion"
classpath 'com.bertramlabs.plugins:asset-pipeline-gradle:2.1.1'
plugins
id "io.spring.dependency-management" version "0.5.2.RELEASE"
version "0.1"
group "qotd"
apply plugin: "spring-boot"
apply plugin: "war"
apply plugin: "asset-pipeline"
apply plugin: 'eclipse'
apply plugin: 'idea'
apply plugin: "org.grails.grails-web"
apply plugin: "org.grails.grails-gsp"
ext
grailsVersion = project.grailsVersion
gradleWrapperVersion = project.gradleWrapperVersion
assets
minifyJs = true
minifyCss = true
repositories
mavenLocal()
maven url "https://repo.grails.org/grails/core"
dependencyManagement
imports
mavenBom "org.grails:grails-bom:$grailsVersion"
applyMavenExclusions false
dependencies
compile "org.springframework.boot:spring-boot-starter-logging"
compile "org.springframework.boot:spring-boot-starter-actuator"
compile "org.springframework.boot:spring-boot-autoconfigure"
compile "org.springframework.boot:spring-boot-starter-tomcat"
compile "org.grails:grails-dependencies"
compile "org.grails:grails-web-boot"
compile 'org.mongodb:mongodb-driver:3.0.2'
compile "org.grails.plugins:hibernate"
compile "org.grails.plugins:cache"
compile "org.hibernate:hibernate-ehcache"
runtime "org.grails.plugins:asset-pipeline"
runtime "org.grails.plugins:scaffolding"
testCompile "org.grails:grails-plugin-testing"
testCompile "org.grails.plugins:geb"
// Note: It is recommended to update to a more robust driver (Chrome, Firefox etc.)
testRuntime 'org.seleniumhq.selenium:selenium-htmlunit-driver:2.44.0'
console "org.grails:grails-console"
task wrapper(type: Wrapper)
gradleVersion = gradleWrapperVersion
...最后，当我尝试执行$ grails run-app 时的实际堆栈跟踪是：
java.util.concurrent.ExecutionException: org.gradle.tooling.BuildException: Could not execute build using Gradle distribution 'https://services.gradle.org/distributions/gradle-2.3-bin.zip'.
at java_util_concurrent_Future$get.call(Unknown Source)
at run-app.run(run-app.groovy:90)
at org.grails.cli.profile.commands.script.GroovyScriptCommand.handle(GroovyScriptCommand.groovy:152)
at org.grails.cli.profile.DefaultProfile.handleCommand(DefaultProfile.groovy:177)
at org.grails.cli.GrailsCli.handleCommand(GrailsCli.groovy:239)
at org.grails.cli.GrailsCli.handleCommand(GrailsCli.groovy:220)
at org.grails.cli.GrailsCli.execute(GrailsCli.groovy:198)
at org.grails.cli.GrailsCli.main(GrailsCli.groovy:99)
Caused by: org.gradle.tooling.BuildException: Could not execute build using Gradle distribution 'https://services.gradle.org/distributions/gradle-2.3-bin.zip'.
at org.gradle.tooling.internal.consumer.ResultHandlerAdapter.onFailure(ResultHandlerAdapter.java:57)
at org.gradle.tooling.internal.consumer.async.DefaultAsyncConsumerActionExecutor$1$1.run(DefaultAsyncConsumerActionExecutor.java:57)
at org.gradle.internal.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:64)
at org.gradle.tooling.internal.consumer.BlockingResultHandler.getResult(BlockingResultHandler.java:46)
at org.gradle.tooling.internal.consumer.DefaultBuildLauncher.run(DefaultBuildLauncher.java:71)
at org.grails.cli.gradle.GradleUtil$_runBuildWithConsoleOutput_closure4.doCall(GradleUtil.groovy:109)
at org.grails.cli.gradle.GradleUtil$_withProjectConnection_closure2.doCall(GradleUtil.groovy:89)
at org.grails.cli.gradle.GradleUtil$_withProjectConnection_closure2.call(GradleUtil.groovy)
at grails.io.support.SystemOutErrCapturer.withNullOutput(SystemOutErrCapturer.groovy:64)
at org.grails.cli.gradle.GradleUtil.withProjectConnection(GradleUtil.groovy:88)
at org.grails.cli.gradle.GradleUtil.runBuildWithConsoleOutput(GradleUtil.groovy:104)
at org.grails.cli.gradle.GradleInvoker.invokeMethod(GradleInvoker.groovy:50)
at org.grails.cli.gradle.GradleAsyncInvoker$_invokeMethod_closure2.doCall(GradleAsyncInvoker.groovy:51)
at org.grails.cli.gradle.GradleAsyncInvoker$_invokeMethod_closure2.doCall(GradleAsyncInvoker.groovy)
Caused by: org.gradle.internal.exceptions.LocationAwareException: Execution failed for task ':bootRun'.
at org.gradle.initialization.DefaultExceptionAnalyser.transform(DefaultExceptionAnalyser.java:77)
at org.gradle.initialization.MultipleBuildFailuresExceptionAnalyser.transform(MultipleBuildFailuresExceptionAnalyser.java:47)
at org.gradle.initialization.StackTraceSanitizingExceptionAnalyser.transform(StackTraceSanitizingExceptionAnalyser.java:30)
at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:108)
at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:86)
at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:80)
at org.gradle.tooling.internal.provider.BuildModelAction.run(BuildModelAction.java:43)
at org.gradle.tooling.internal.provider.BuildModelAction.run(BuildModelAction.java:30)
at org.gradle.tooling.internal.provider.ConfiguringBuildAction.run(ConfiguringBuildAction.java:119)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:36)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:26)
at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:48)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:37)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:74)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:72)
at org.gradle.util.Swapper.swap(Swapper.java:38)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:72)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
at org.gradle.launcher.daemon.server.health.DaemonHealthTracker.execute(DaemonHealthTracker.java:47)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:60)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:71)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
at org.gradle.launcher.daemon.server.health.HintGCAfterBuild.execute(HintGCAfterBuild.java:41)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50)
at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:246)
at org.gradle.internal.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:64)
Caused by: org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':bootRun'.
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:69)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:46)
at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:35)
at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:64)
at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:42)
at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:53)
at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
at org.gradle.api.internal.AbstractTask.executeWithoutThrowingTaskFailure(AbstractTask.java:306)
at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.executeTask(AbstractTaskPlanExecutor.java:79)
at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.processTask(AbstractTaskPlanExecutor.java:63)
at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.run(AbstractTaskPlanExecutor.java:51)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(DefaultTaskPlanExecutor.java:23)
at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:88)
at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:29)
at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:62)
at org.gradle.execution.DefaultBuildExecuter.access$200(DefaultBuildExecuter.java:23)
at org.gradle.execution.DefaultBuildExecuter$2.proceed(DefaultBuildExecuter.java:68)
at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32)
at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:62)
at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:55)
at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:149)
at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:106)
... 34 more
Caused by: org.gradle.process.internal.ExecException: Process 'command '/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.85.x86_64/jre/bin/java'' finished with non-zero exit value 1
at org.gradle.process.internal.DefaultExecHandle$ExecResultImpl.assertNormalExitValue(DefaultExecHandle.java:365)
at org.gradle.process.internal.DefaultJavaExecAction.execute(DefaultJavaExecAction.java:31)
at org.gradle.api.tasks.JavaExec.exec(JavaExec.java:60)
at org.springframework.boot.gradle.run.BootRunTask.exec(BootRunTask.java:58)
at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:63)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.doExecute(AnnotationProcessingTaskFactory.java:218)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:211)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:200)
at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:585)
at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:568)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:80)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:61)
... 57 more
| Error Failed to start server
任何帮助将不胜感激；我花了好几个小时把头撞在桌子上，发现无用的搜索结果。
【问题讨论】：
【参考方案1】：是的，要找到用于配置 Grails 3.0 以使用 MongoDB 的最新文档是一个挑战。下面的解决方案是从各种来源拼凑而成的。
build.gradle
dependencies
...
compile "org.grails.plugins:mongodb"
...
您无需手动下载和安装任何 JDBC 文件。
grails-app/conf/application.yml
environments:
development:
grails:
mongodb:
connectionString: "mongodb://localhost:27017/project-db"
grails-app/domain/com/example/Book.groovy
package com.example
import org.bson.types.ObjectId
class Book
ObjectId id
String title
static mapWith = "mongo"
自 Grails 3.0.1 以来，我一直在成功使用这种方法，并且它仍在使用 3.0.4。
【讨论】：
在 Grails 3.1.1 上对其进行了测试，它仍然有效。谢谢大家。【参考方案2】：Dem Pilafian 很棒而且很正确。我的只是略有不同。您可以在您的类中省略映射并依靠 mongodb 直接存储您的对象。您需要做的就是从您的项目中移除休眠。
使用 Grails 3.1.7
build.gradle
dependencies
compile "org.grails.plugins:mongodb"
//compile "org.grails.plugins:hibernate4"
//compile "org.hibernate:hibernate-ehcache"
//runtime "com.h2database:h2"
我已经注释掉了 hibernate 和 h2 依赖项。如果您只使用 mongodb，当然可以完全删除它们。
grails-app/conf/application.yml
environments:
development:
grails:
mongodb:
host: "hostname"
port: 27017
databaseName: development
在 application.yml 中，您需要删除 hibernate: 部分和 driverClassName: org.h2.Driver。
有关更多背景信息以及其他配置选项，请参阅：GORM Grails MongoDB
这样，您将完全绕过休眠并且不需要在您的类中定义映射。您的对象将直接存储为 mongo 中的结构化文档。
【讨论】：
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