我已经验证我可以使用Java测试程序连接到postgres数据库。我还验证了我可以使用一个小的Grails testDB项目进行连接。但是当我尝试运行我的大型项目时，同样的BuildConfig.groovy，它就失败了。
我已经在postgres jar中尝试了不同的jdbc版本（例如，4而不是41），但它没有帮助。
我一直在搜索stackoverflow和其他任何我无法找到的东西（例如，＆＃34;帮助我stackoverflow，你的唯一希望＆＃34;）。
我的BuildConfig.groovy文件如下所示：
grails.servlet.version = "3.0" // Change depending on target container compliance (2.5 or 3.0)
grails.project.class.dir = "target/classes"
grails.project.test.class.dir = "target/test-classes"
grails.project.test.reports.dir = "target/test-reports"
grails.project.work.dir = "target/work"
grails.project.target.level = 1.6
grails.project.source.level = 1.6
//grails.project.war.file = "target/${appName}-${appVersion}.war"
grails.project.fork = [
// configure settings for compilation JVM, note that if you alter the Groovy version forked compilation is required
// compile: [maxMemory: 256, minMemory: 64, debug: false, maxPerm: 256, daemon:true],
// configure settings for the test-app JVM, uses the daemon by default
test: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, daemon:true],
// configure settings for the run-app JVM
run: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, forkReserve:false],
// configure settings for the run-war JVM
war: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, forkReserve:false],
// configure settings for the Console UI JVM
console: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256]
]
grails.project.dependency.resolver = "maven" // or ivy
grails.project.dependency.resolution = {
// inherit Grails' default dependencies
inherits("global") {
// specify dependency exclusions here; for example, uncomment this to disable ehcache:
// excludes 'ehcache'
}
log "error" // log level of Ivy resolver, either 'error', 'warn', 'info', 'debug' or 'verbose'
checksums true // Whether to verify checksums on resolve
legacyResolve false // whether to do a secondary resolve on plugin installation, not advised and here for backwards compatibility
repositories {
inherits true // Whether to inherit repository definitions from plugins
grailsPlugins()
grailsHome()
mavenLocal()
grailsCentral()
mavenCentral()
// uncomment these (or add new ones) to enable remote dependency resolution from public Maven repositories
//mavenRepo "http://repository.codehaus.org"
//mavenRepo "http://download.java.net/maven/2/"
//mavenRepo "http://repository.jboss.com/maven2/"
}
dependencies {
// specify dependencies here under either 'build', 'compile', 'runtime', 'test' or 'provided' scopes e.g.
// runtime 'mysql:mysql-connector-java:5.1.29'
compile 'org.postgresql:postgresql:9.3-1101-jdbc41'
runtime 'org.postgresql:postgresql:9.3-1101-jdbc41'
test "org.grails:grails-datastore-test-support:1.0-grails-2.4"
}
plugins {
// plugins for the build system only
build ":tomcat:7.0.55"
// plugins for the compile step
compile ":scaffolding:2.1.2"
compile ':cache:1.1.7'
compile ":asset-pipeline:1.9.6"
compile ":twitter-bootstrap:3.2.1"
// compile ":jquery-dialog:2.0.3"
// plugins needed at runtime but not for compilation
runtime ":hibernate4:4.3.5.5" // or ":hibernate:3.6.10.15"
runtime ":database-migration:1.4.0"
runtime ":jquery:1.11.1"
runtime ":twitter-bootstrap:3.2.1"
}
}
我的DataSource.groovy文件包含
dataSource {
pooled = true
jmxExport = true
url = "jdbc:postgresql://150.18.178.9:5432/myDB"
driverClassName = "org.postgresql.Driver"
dbCreate = "update"
username = "user"
password = "password"
dialect = net.sf.hibernate.dialect.PostgreSQLDialect
}
hibernate {
cache.use_second_level_cache = true
cache.use_query_cache = false
// cache.region.factory_class = 'net.sf.ehcache.hibernate.EhCacheRegionFactory' // Hibernate 3
cache.region.factory_class = 'org.hibernate.cache.ehcache.EhCacheRegionFactory' // Hibernate 4
singleSession = true // configure OSIV singleSession mode
}
// environment specific settings
environments {
development {
dataSource { // database dev
dbCreate = "update" // one of 'create', 'create-drop', 'update', 'validate', ''
url="jdbc:postgresql://150.18.178.9:5432/dev"
username = "user"
password = "password"
}
}
test {
dataSource {
dbCreate = "update"
url="jdbc:postgresql://150.18.178.9:5432/test"
username = "user"
password = "password"
}
}
production {
dataSource {
dbCreate = "update"
url="jdbc:postgresql://150.18.178.9:5432/myDB"
username = "user"
password = "password"
properties {
// See http://grails.org/doc/latest/guide/conf.html#dataSource for documentation
jmxEnabled = true
initialSize = 5
maxActive = 50
minIdle = 5
maxIdle = 25
maxWait = 10000
maxAge = 10 * 60000
timeBetweenEvictionRunsMillis = 5000
minEvictableIdleTimeMillis = 60000
validationQuery = "SELECT 1"
validationQueryTimeout = 3
validationInterval = 15000
testOnBorrow = true
testWhileIdle = true
testOnReturn = false
jdbcInterceptors = "ConnectionState"
defaultTransactionIsolation = java.sql.Connection.TRANSACTION_READ_COMMITTED
}
}
}
}
当我尝试运行我的应用程序时，我得到：
/usr/java/latest/bin/java -Dgrails.home=/home/iank/software/grails/latest -Dbase.dir=/home/iank/IdeaProjects/nderground -Dtools.jar=/usr/java/latest/lib/tools.jar -Dgroovy.starter.conf=/home/iank/software/grails/latest/conf/groovy-starter.conf -Xmx768M -Xms768M -XX:MaxPermSize=256m -XX:PermSize=256m -javaagent:/home/iank/software/grails/latest/lib/org.springframework/springloaded/jars/springloaded-1.2.0.RELEASE.jar -noverify -Dspringloaded=profile=grails -Didea.launcher.port=7535 -Didea.launcher.bin.path=/home/iank/software/idea-IU-135.909/bin -Dfile.encoding=UTF-8 -classpath /home/iank/software/grails/latest/lib/org.codehaus.groovy/groovy-all/jars/groovy-all-2.3.6.jar:/home/iank/software/grails/latest/dist/grails-bootstrap-2.4.3.jar:/home/iank/software/idea-IU-135.909/lib/idea_rt.jar com.intellij.rt.execution.application.AppMain org.codehaus.groovy.grails.cli.support.GrailsStarter --main org.codehaus.groovy.grails.cli.GrailsScriptRunner --conf /home/iank/software/grails/latest/conf/groovy-starter.conf "run-app -plain-output"
|Loading Grails 2.4.3
|Configuring classpath
.
|Environment set to development
.................................
|Packaging Grails application
...........
|Compiling 1 source files
............................
|Running Grails application
| Error 2014-09-27 17:16:38,021 [localhost-startStop-1] ERROR context.GrailsContextLoaderListener - Error initializing the application: Error creating bean with name 'transactionManagerPostProcessor': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: object is not an instance of declaring class
Message: Error creating bean with name 'transactionManagerPostProcessor': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: object is not an instance of declaring class
Line | Method
->> 262 | run in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 615 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Caused by BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: object is not an instance of declaring class
->> 262 | run in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 615 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Caused by BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: object is not an instance of declaring class
->> 262 | run in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 615 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Caused by IllegalArgumentException: object is not an instance of declaring class
->> 22 | doCall in nderground.User$__clinit__closure1
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 262 | run in java.util.concurrent.FutureTask
| 1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 615 | run in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run . . . in java.lang.Thread
Error |
Forked Grails VM exited with error
|Server running. Browse to http://localhost:8080/nderground
Process finished with exit code 1
任何帮助都将深表感谢。我的进展完全停滞不前，除了尝试一块一块地重建项目之外，我不知道该做什么。
非常感谢......
答案 0 :(得分：1)
通过创建一个有效且慢慢添加代码的Grails项目，我能够找到问题所在。我有一个未正确指定的约束。
class User {
String handle
String emailAddr
String salt
String password
boolean isAdmin
String toString()
{
String rslt = "$handle"
return rslt
}
static constraints = {
handle blank : false, nullable : false, unique : true
emailAddr blank : false, nullable : false, unique : true, email : true
salt blank: false, nullable: false
password blank: false, nullable: false
isAdmin false <<======= This is the problem!
}
static mapping = {
table 'users'
handle index : 'handle_Ix'
emailAddr index: 'email_ix'
isAdmin defaultValue: false
}
}
这应该在静态映射部分：
static mapping = {
table 'users'
handle index : 'handle_Ix'
emailAddr index: 'email_ix'
isAdmin defaultValue: false <<== This is the right way to set the default
}
说得客气一点，令人讨厌的是，错误显示为线程创建错误，没有任何其他错误指示。
答案 1 :(得分：0)
正如@EElke在评论中指出的那样，没有迹象表明Postgres是问题所在;你应该看到的错误是Error creating bean with name 'sessionFactory' ... object is not an instance of declaring class。
我的猜测是net.sf.hibernate.dialect.PostgreSQLDialect是问题 - 用org.hibernate.dialect.PostgreSQLDialect替换它。
另外，删除这个：
runtime 'org.postgresql:postgresql:9.3-1101-jdbc41'
因为你已经
了compile 'org.postgresql:postgresql:9.3-1101-jdbc41'
和运行时范围包括编译范围的依赖关系。
答案 2 :(得分：0)
感谢你回答我的问题，伯特。我非常感谢你的时间。我对DataSource.groovy做了这个改动：
dataSource {
pooled = true
jmxExport = true
url = "jdbc:postgresql://150.18.178.9:5432/myDB"
driverClassName = "org.postgresql.Driver"
dbCreate = "update"
username = "user" // the real user and password would normally be here
password = "password"
// dialect = net.sf.hibernate.dialect.PostgreSQLDialect
dialect = org.hibernate.dialect.PostgreSQLDialect
}
不幸的是，问题仍然存在。
只要您不必查看黑匣子，框架就会很棒。但是在这种情况下，错误发生在框架中的某个地方并且被遮盖了。
我通过JDBC有很多SQL经验，此时我认为我可以尝试从Grails应用程序中删除Hibernate。我只有五个左右的表，SQL查询非常简单。鉴于我花费了大量时间，我可以在相同的时间内重写Java JDBC中的所有内容。 Hibernate没有提供我的优势。
我喜欢自己处理数据库连接的一件事是我可以在连接数据库和SQL时记录更清晰的错误。
[后]
我考虑摆脱Hibernate。我当然可以在没有Hibernate的情况下构建Grails应用程序。但是，Hibernate基础架构不仅为您提供数据访问和更新。 Grails Hibernate基础结构还隐藏了有关连接池的所有细节（据我所知，在Tomcat上，它使用Tomcat的连接池）。为了使其在Grails Hibernate之外工作，您必须实现JNDI Connection数据源。这意味着更改Tomcat文件（web.xml和configure.xml）。因此，您不能再只创建Grails WAR文件并将其放在Tomcat Web服务器上。所以看起来我一直在寻找问题的根源。当我找到它时，我会再次发帖。