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Google App Engine の groovy/gaelyk で JPA を実装しようとしています。私の環境：

IDE: Eclipse ケプラー SR2
groovy-all-2.0.7.jar
gaelyk-2.0.jar
Google App Engine SDK-1.9.0
MySQL

persistence.xml

<persistence-unit name="Post1Demo">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <!-- We are using JPA provided by Eclipselink -->
    <!-- Post.groovy class is in the project's package -->
    <class>com.sample.gaelyk2.Post</class>
    <exclude-unlisted-classes/>
    <properties>
        <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
        <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost/test" />
        <property name="javax.persistence.jdbc.user" value="myname" />
        <property name="javax.persistence.jdbc.password" value="mypassword" />

    </properties>


</persistence-unit>

com.sample.gaelyk2 の下の src/Post.groovy

package com.sample.gaelyk2

import java.io.Serializable;
import javax.persistence.*

@Entity
@Table(name="post")
class Post implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long COLID

String body
String timestamp
String title
}

WEB-INF/groovy/welcome_db.groovy

import javax.persistence.EntityManager
import javax.persistence.Query
import javax.persistence.EntityManagerFactory
import javax.persistence.Persistence

import com.sample.gaelyk2.Post

try {
String PERSISTENCE_UNIT_NAME = "Post1Demo"      // see persistence.xml

factory = Persistence.createEntityManagerFactory(PERSISTENCE_UNIT_NAME)
EntityManager em = factory.createEntityManager()

THE PROBLEM IS RIGHT HEREEEEEE.......

Query q = em.createQuery("from Post")       // MUST match class name, case sensitive
def postList = q.getResultList()


//
// Fill up the request and forward it to index_db.gtpl
//
request.setAttribute 'posts', postList
forward 'index_db.gtpl' 
} catch (Throwable t) {
println "Error in welcome_db"
forward 'index_db.gtpl'
}

ブラウザから localhost:8888/welcom_db.groovy を実行すると、次の例外が発生しました。すべてをJavaで実装すると、この問題は発生しません。

SEVERE: Unable to instrument com.sample.gaelyk2.Post. Security restrictions may not be entirely emulated.
java.lang.ArrayIndexOutOfBoundsException: 271
at com.google.appengine.repackaged.org.objectweb.asm.ClassReader.readLabel(ClassReader.java:1880)
at com.google.appengine.repackaged.org.objectweb.asm.ClassReader.readFrameType(ClassReader.java:1860)
at com.google.appengine.repackaged.org.objectweb.asm.ClassReader.readFrame(ClassReader.java:1794)
at com.google.appengine.repackaged.org.objectweb.asm.ClassReader.readCode(ClassReader.java:1214)
at com.google.appengine.repackaged.org.objectweb.asm.ClassReader.readMethod(ClassReader.java:938)
at com.google.appengine.repackaged.org.objectweb.asm.ClassReader.accept(ClassReader.java:669)
at com.google.appengine.repackaged.org.objectweb.asm.ClassReader.accept(ClassReader.java:506)
at com.google.appengine.tools.development.agent.impl.Transformer.rewrite(Transformer.java:146)
at com.google.appengine.tools.development.agent.impl.Transformer.transform(Transformer.java:113)
at sun.instrument.TransformerManager.transform(TransformerManager.java:188)
at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:424)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:216)
at java.lang.ClassLoader.loadClass(ClassLoader.java:412)
at groovy.lang.GroovyClassLoader.loadClass(GroovyClassLoader.java:648)
at groovy.lang.GroovyClassLoader.loadClass(GroovyClassLoader.java:516)
at org.codehaus.groovy.control.ClassNodeResolver.tryAsLoaderClassOrScript(ClassNodeResolver.java:183)
at org.codehaus.groovy.control.ClassNodeResolver.findClassNode(ClassNodeResolver.java:168)
at groovy.util.GroovyScriptEngine$ScriptClassLoader$3.findClassNode(GroovyScriptEngine.java:211)
at org.codehaus.groovy.control.ClassNodeResolver.resolveName(ClassNodeResolver.java:124)
at org.codehaus.groovy.control.ResolveVisitor.resolveToOuter(ResolveVisitor.java:616)
at org.codehaus.groovy.control.ResolveVisitor.resolve(ResolveVisitor.java:268)
at org.codehaus.groovy.control.ResolveVisitor.visitClass(ResolveVisitor.java:1133)
at org.codehaus.groovy.control.ResolveVisitor.startResolving(ResolveVisitor.java:141)
at org.codehaus.groovy.control.CompilationUnit$9.call(CompilationUnit.java:624)
at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:903)
at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:566)
at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:515)
at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:279)
at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:258)
at groovy.util.GroovyScriptEngine$ScriptClassLoader.doParseClass(GroovyScriptEngine.java:247)
at groovy.util.GroovyScriptEngine$ScriptClassLoader.parseClass(GroovyScriptEngine.java:229)
at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:244)
at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:202)
at groovy.util.GroovyScriptEngine.loadScriptByName(GroovyScriptEngine.java:514)
at groovy.util.GroovyScriptEngine.createScript(GroovyScriptEngine.java:564)
at groovy.util.GroovyScriptEngine.run(GroovyScriptEngine.java:551)
at groovyx.gaelyk.GaelykServlet.runGroovlet(GaelykServlet.groovy:154)
at groovyx.gaelyk.GaelykServlet.doService(GaelykServlet.groovy:118)
at groovyx.gaelyk.GaelykServlet.service(GaelykServlet.groovy:87)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:127)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:487)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)


[EL Info]: 2014-03-15 01:21:04.538--ServerSession(1464126150)--EclipseLink, version: Eclipse Persistence Services - 2.5.0.v20130507-3faac2b
[EL Info]: connection: 2014-03-15 01:21:05.859--ServerSession(1464126150)--file:/C:/Users/myuser/Documents/workspace/GaeAppGaelyk2/war/WEB-INF/classes/_Post1Demo login successful
Mar 15, 2014 1:21:06 AM com.google.appengine.tools.development.ApiProxyLocalImpl log
INFO: javax.servlet.ServletContext log: TemplateServlet: Servlet groovyx.gaelyk.GaelykTemplateServlet initialized on class groovy.text.SimpleTemplateEngine

過去 2 週間、Google で検索してきましたが、解決策が見つかりませんでした。Groovy Class Loader に問題があるのではないかと疑っていましたが、修正方法がわかりません。

混乱は、私が持っていたスタック トレースの一番下にあります

。

ありがとう。

4

2 に答える 2

1

組み込みのデータストア エンティティ サポートの代わりに何らかの理由で JPA を使用する必要がある場合は、Groovy と 100% 相互運用可能な Java でエンティティを作成する必要があります。JPA実装として使用されるDataNucleusは、クラスを計測する必要があり、コンパイルされたGroovyクラスに対しては明らかにそれを行うことができません。コードの残りの部分では、引き続き Groovy と Gaelyk を使用できます。

于 2014-03-15T16:22:11.557 に答える