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POApp Engine does not create local_db.bin
 

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  1. POApp Engine does not create local_db.bin
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    <p>Im new with appengine, Im using appengine version 1.8.7(also happens to me in 1.8.6), and trying to add maven to the project. </p> <p>When I persist an entity the log is the following:</p> <pre><code>[INFO] nov 07, 2013 5:38:33 PM com.google.appengine.api.datastore.dev.LocalDatastoreService init [INFO] INFO: Local Datastore initialized: [INFO] Type: High Replication [INFO] Storage: D:\Projects\JEE\myapp\tmp\local_db.bin [INFO] nov 07, 2013 5:38:33 PM com.google.appengine.api.datastore.dev.LocalDatastoreService load [INFO] INFO: The backing store, D:\Projects\JEE\myapp\tmp\local_db.bin, does not exist. It will be created. </code></pre> <p>My issue is that the local_db.bin is not created. And for example if I try to make a search of my peristed entity an errors appears.</p> <pre><code>[INFO] java.lang.IllegalArgumentException: Type com.harriague.myapp.dao.entities.Travel is not a known entity type [INFO] at org.datanucleus.api.jpa.metamodel.MetamodelImpl.entity(MetamodelImpl.java:193) </code></pre> <p>...</p> <p>This is my entity class:</p> <pre><code>package com.harriague.myapp.dao.entities; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Column; import com.google.appengine.api.datastore.Key; @Entity(name = "Travel") public class Travel { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Key travelId; @Column(name = "name") private String name; public Travel() { } public Key getTravelId() { return travelId; } public void setTravelId(Key travelId) { this.travelId = travelId; } public String getName() { return name; } public void setName(String name) { this.name = name; } } </code></pre> <p>Here is mi pom.xml:</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"&gt; &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt; &lt;packaging&gt;war&lt;/packaging&gt; &lt;version&gt;1.0-SNAPSHOT&lt;/version&gt; &lt;groupId&gt;com.harriague&lt;/groupId&gt; &lt;artifactId&gt;myapp&lt;/artifactId&gt; &lt;properties&gt; &lt;appengine.app.version&gt;1&lt;/appengine.app.version&gt; &lt;appengine.target.version&gt;1.8.7&lt;/appengine.target.version&gt; &lt;datanucleus-core.version&gt;3.1.3&lt;/datanucleus-core.version&gt; &lt;project.build.sourceEncoding&gt;UTF-8&lt;/project.build.sourceEncoding&gt; &lt;/properties&gt; &lt;dependencies&gt; &lt;!-- Compile/runtime dependencies --&gt; &lt;dependency&gt; &lt;groupId&gt;com.google.appengine&lt;/groupId&gt; &lt;artifactId&gt;appengine-api-1.0-sdk&lt;/artifactId&gt; &lt;version&gt;${appengine.target.version}&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;com.google.appengine&lt;/groupId&gt; &lt;artifactId&gt;appengine-endpoints&lt;/artifactId&gt; &lt;version&gt;${appengine.target.version}&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;com.google.appengine&lt;/groupId&gt; &lt;artifactId&gt;appengine-api-labs&lt;/artifactId&gt; &lt;version&gt;${appengine.target.version}&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.ow2.asm&lt;/groupId&gt; &lt;artifactId&gt;asm&lt;/artifactId&gt; &lt;version&gt;4.0&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;javax.servlet&lt;/groupId&gt; &lt;artifactId&gt;servlet-api&lt;/artifactId&gt; &lt;version&gt;2.5&lt;/version&gt; &lt;scope&gt;provided&lt;/scope&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;jstl&lt;/groupId&gt; &lt;artifactId&gt;jstl&lt;/artifactId&gt; &lt;version&gt;1.2&lt;/version&gt; &lt;/dependency&gt; &lt;!-- JSON --&gt; &lt;dependency&gt; &lt;groupId&gt;com.googlecode.json-simple&lt;/groupId&gt; &lt;artifactId&gt;json-simple&lt;/artifactId&gt; &lt;version&gt;1.1.1&lt;/version&gt; &lt;/dependency&gt; &lt;!-- Test Dependencies --&gt; &lt;dependency&gt; &lt;groupId&gt;com.google.appengine&lt;/groupId&gt; &lt;artifactId&gt;appengine-testing&lt;/artifactId&gt; &lt;version&gt;${appengine.target.version}&lt;/version&gt; &lt;scope&gt;test&lt;/scope&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;com.google.appengine&lt;/groupId&gt; &lt;artifactId&gt;appengine-api-stubs&lt;/artifactId&gt; &lt;version&gt;${appengine.target.version}&lt;/version&gt; &lt;scope&gt;test&lt;/scope&gt; &lt;/dependency&gt; &lt;!-- Spring framework --&gt; &lt;!-- &lt;dependency&gt; &lt;groupId&gt;org.springframework&lt;/groupId&gt; &lt;artifactId&gt;spring&lt;/artifactId&gt; &lt;version&gt;2.5.6&lt;/version&gt; &lt;/dependency&gt; --&gt; &lt;!-- Javax persistence --&gt; &lt;dependency&gt; &lt;groupId&gt;org.datanucleus&lt;/groupId&gt; &lt;artifactId&gt;datanucleus-core&lt;/artifactId&gt; &lt;version&gt;${datanucleus-core.version}&lt;/version&gt; &lt;scope&gt;runtime&lt;/scope&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.apache.geronimo.specs&lt;/groupId&gt; &lt;artifactId&gt;geronimo-jpa_2.0_spec&lt;/artifactId&gt; &lt;version&gt;1.1&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.datanucleus&lt;/groupId&gt; &lt;artifactId&gt;datanucleus-api-jpa&lt;/artifactId&gt; &lt;version&gt;3.1.3&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;com.google.appengine.orm&lt;/groupId&gt; &lt;artifactId&gt;datanucleus-appengine&lt;/artifactId&gt; &lt;version&gt;2.1.2&lt;/version&gt; &lt;!-- Need to exclude the enhancer since it interfere with the enhancer plugin. --&gt; &lt;exclusions&gt; &lt;exclusion&gt; &lt;groupId&gt;org.datanucleus&lt;/groupId&gt; &lt;artifactId&gt;datanucleus-enhancer&lt;/artifactId&gt; &lt;/exclusion&gt; &lt;/exclusions&gt; &lt;/dependency&gt; &lt;/dependencies&gt; &lt;build&gt; &lt;plugins&gt; &lt;plugin&gt; &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt; &lt;version&gt;2.5.1&lt;/version&gt; &lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt; &lt;configuration&gt; &lt;source&gt;1.6&lt;/source&gt; &lt;target&gt;1.6&lt;/target&gt; &lt;/configuration&gt; &lt;/plugin&gt; &lt;plugin&gt; &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt; &lt;artifactId&gt;maven-war-plugin&lt;/artifactId&gt; &lt;version&gt;2.3&lt;/version&gt; &lt;configuration&gt; &lt;archiveClasses&gt;true&lt;/archiveClasses&gt; &lt;webResources&gt; &lt;!-- in order to interpolate version from pom into appengine-web.xml --&gt; &lt;resource&gt; &lt;directory&gt;${basedir}/src/main/webapp/WEB-INF&lt;/directory&gt; &lt;filtering&gt;true&lt;/filtering&gt; &lt;targetPath&gt;WEB-INF&lt;/targetPath&gt; &lt;/resource&gt; &lt;!-- &lt;resource&gt; &lt;directory&gt;${basedir}/src/main/resources&lt;/directory&gt; &lt;/resource&gt; --&gt; &lt;/webResources&gt; &lt;/configuration&gt; &lt;/plugin&gt; &lt;plugin&gt; &lt;groupId&gt;com.google.appengine&lt;/groupId&gt; &lt;artifactId&gt;appengine-maven-plugin&lt;/artifactId&gt; &lt;version&gt;${appengine.target.version}&lt;/version&gt; &lt;configuration&gt; &lt;enableJarClasses&gt;false&lt;/enableJarClasses&gt; &lt;!--&lt;jvmFlags&gt; &lt;jvmFlag&gt;-Ddatastore.backing_store=${basedir}\local_db.bin&lt;/jvmFlag&gt; &lt;/jvmFlags&gt; --&gt; &lt;jvmFlags&gt; &lt;jvmFlag&gt;-Dappengine.generated.dir=${basedir}/tmp&lt;/jvmFlag&gt; &lt;/jvmFlags&gt; &lt;!-- &lt;jvmFlags&gt; &lt;jvmFlag&gt;-Xdebug&lt;/jvmFlag&gt; &lt;jvmFlag&gt;-Xrunjdwp:transport=dt_socket,address=8080,server=y,suspend=y&lt;/jvmFlag&gt; &lt;/jvmFlags&gt; --&gt; &lt;disableUpdateCheck&gt;true&lt;/disableUpdateCheck&gt; &lt;/configuration&gt; &lt;/plugin&gt; &lt;plugin&gt; &lt;groupId&gt;org.datanucleus&lt;/groupId&gt; &lt;artifactId&gt;maven-datanucleus-plugin&lt;/artifactId&gt; &lt;version&gt;3.1.1&lt;/version&gt; &lt;configuration&gt; &lt;api&gt;JPA&lt;/api&gt; &lt;fork&gt;false&lt;/fork&gt; &lt;persistenceUnitName&gt;transactions-optional&lt;/persistenceUnitName&gt; &lt;verbose&gt;true&lt;/verbose&gt; &lt;/configuration&gt; &lt;executions&gt; &lt;execution&gt; &lt;phase&gt;process-classes&lt;/phase&gt; &lt;goals&gt; &lt;goal&gt;enhance&lt;/goal&gt; &lt;/goals&gt; &lt;/execution&gt; &lt;/executions&gt; &lt;/plugin&gt; &lt;/plugins&gt; &lt;/build&gt; &lt;/project&gt; </code></pre> <p>In addition, if this project is created with the appengine eclipse plugin, nothing of this happends and me code works fine.</p> <p>Thanks in advance</p>
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