Maven GAE Plugin using JDO - google-app-engine

I'm using Maven GAE plugin with JDO, I started with jappstart example (https://github.com/tleese22/google-app-engine-jappstart/blob/master/pom.xml), but for some reason classes are not enhanced when I run gae:run command, even I have configured enhancement.
<plugin>
<groupId>org.datanucleus</groupId>
<artifactId>maven-datanucleus-plugin</artifactId>
<version>1.1.4</version>
<configuration>
<mappingIncludes>**/jdo/*.class</mappingIncludes>
<verbose>true</verbose>
<enhancerName>ASM</enhancerName>
<api>JDO</api>
</configuration>
<executions>
<execution>
<phase>compile</phase>
<goals>
<goal>enhance</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>${datanucleus.version}</version>
<exclusions>
<exclusion>
<groupId>javax.transaction</groupId>
<artifactId>transaction-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-rdbms</artifactId>
<version>${datanucleus.version}</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-enhancer</artifactId>
<version>1.1.4</version>
</dependency>
<dependency>
<groupId>javax.jdo</groupId>
<artifactId>jdo2-api</artifactId>
<version>2.3-ec</version>
</dependency>
</dependencies>
</plugin>
Exception:
javax.jdo.JDOUserException: Persistent class "Class com.my.Entity does not seem to have been enhanced. You may want to rerun the enhancer and check for errors in the output." has no table in the database, but the operation requires it. Please check the specification of the MetaData for this class.

I had something wrong with my mappings includes. Now it works if entities are in package that has last name entity (example com.my.app.entity):
<mappingIncludes>**/entity/*.class</mappingIncludes>

Related

How to provide additional JDBC properties for Google Cloud App Engine

I'm trying to connect to a PostgreSQL database from Quarkus on Google App Engine. For this, additional JDBC properties "socketFactory" and "cloudSqlInstance" must be provided. But I can't figure out how to specify these in application.properties.
According to https://quarkus.io/guides/datasource, there is a propery "quarkus.datasource.jdbc.additional-jdbc-properties". But if I try to use it, connecting fails and in the logs I see:
Unrecognized configuration key "quarkus.datasource.jdbc.additional-jdbc-properties" was provided; it will be ignored;
I'm fairly sure that the required extensions are installed.
I tried several other properties like "quarkus.datasource.additional-jdbc-properties" mentioned here, but without success. Now I've run out of ideas what to try. Is there any way to specify the required properties?
application.properties:
quarkus.package.type=uber-jar
# datasource configuration
quarkus.datasource.db-kind = postgresql
quarkus.datasource.jdbc.url = jdbc:postgresql:///counter
quarkus.datasource.username = postgres
quarkus.datasource.password = <password>
quarkus.datasource.jdbc.additional-jdbc-properties=socketFactory=com.google.cloud.sql.postgres.SocketFactory,cloudSqlInstance=<project>:<region>:<instance>
quarkus.datasource.jdbc.max-size=16
# drop and create the database at startup (use `update` to only update the schema)
quarkus.hibernate-orm.database.generation=drop-and-create
pom.xml:
<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>org.acme</groupId>
<artifactId>getting-started</artifactId>
<version>1.0.0-SNAPSHOT</version>
<properties>
<compiler-plugin.version>3.8.1</compiler-plugin.version>
<maven.compiler.parameters>true</maven.compiler.parameters>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<quarkus-plugin.version>1.10.2.Final</quarkus-plugin.version>
<quarkus.platform.artifact-id>quarkus-universe-bom</quarkus.platform.artifact-id>
<quarkus.platform.group-id>io.quarkus</quarkus.platform.group-id>
<quarkus.platform.version>1.10.2.Final</quarkus.platform.version>
<surefire-plugin.version>2.22.1</surefire-plugin.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>${quarkus.platform.group-id}</groupId>
<artifactId>${quarkus.platform.artifact-id}</artifactId>
<version>${quarkus.platform.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>com.google.cloud</groupId>
<artifactId>libraries-bom</artifactId>
<version>16.1.0</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-arc</artifactId>
</dependency>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-resteasy</artifactId>
</dependency>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-hibernate-orm</artifactId>
</dependency>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-jdbc-postgresql</artifactId>
</dependency>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-junit5</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.rest-assured</groupId>
<artifactId>rest-assured</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-maven-plugin</artifactId>
<version>${quarkus-plugin.version}</version>
<extensions>true</extensions>
<executions>
<execution>
<goals>
<goal>build</goal>
<goal>generate-code</goal>
<goal>generate-code-tests</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>${compiler-plugin.version}</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>${surefire-plugin.version}</version>
<configuration>
<systemPropertyVariables>
<java.util.logging.manager>org.jboss.logmanager.LogManager</java.util.logging.manager>
<maven.home>${maven.home}</maven.home>
</systemPropertyVariables>
</configuration>
</plugin>
</plugins>
</build>
<profiles>
<profile>
<id>native</id>
<activation>
<property>
<name>native</name>
</property>
</activation>
<build>
<plugins>
<plugin>
<artifactId>maven-failsafe-plugin</artifactId>
<version>${surefire-plugin.version}</version>
<executions>
<execution>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
<configuration>
<systemPropertyVariables>
<native.image.path>${project.build.directory}/${project.build.finalName}-runner</native.image.path>
<java.util.logging.manager>org.jboss.logmanager.LogManager</java.util.logging.manager>
<maven.home>${maven.home}</maven.home>
</systemPropertyVariables>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<properties>
<quarkus.package.type>native</quarkus.package.type>
</properties>
</profile>
</profiles>
</project>
Try with this:
quarkus.datasource.jdbc.additional-jdbc-properties.socketFactory=com.google.cloud.sql.postgres.SocketFactory
quarkus.datasource.jdbc.additional-jdbc-properties.socketFactoryArg=<project>:<region>:<instance>
PS: You don't need to use strictly a SocketFactory to connect to a CloudSQL from GAE.

Unable to attach screen shot to cucumber JVM report

I am using the cucumber version 4 in my project I am using the following dependencies in my project.
<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">
<modelVersion>4.0.0</modelVersion>
<groupId>ABCXYZ</groupId>
<artifactId>ABCXYZ</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>ABCXYZ</name>
<url>http://maven.apache.org</url>
<build>
<plugins>
<!-- Plugin For Reporting -->
<plugin>
<groupId>net.masterthought</groupId>
<artifactId>maven-cucumber-reporting</artifactId>
<version>5.3.0</version>
<executions>
<execution>
<id>execution</id>
<phase>test</phase>
<goals>
<goal>generate</goal>
</goals>
<configuration>
<projectName>ABCXYZ</projectName>
<!-- optional, per documentation set this to "true" to bypass generation of Cucumber Reports entirely, defaults to false if not specified -->
<skip>false</skip>
<!-- output directory for the generated report -->
<outputDirectory>target/cucumber-report-html</outputDirectory>
<!-- optional, defaults to outputDirectory if not specified -->
<inputDirectory>${project.build.directory}</inputDirectory>
<jsonFiles>
<!-- supports wildcard or name pattern -->
<param>**/*.json</param>
</jsonFiles>
<!-- optional, defaults to outputDirectory if not specified -->
<classificationDirectory>${project.build.directory}</classificationDirectory>
<classificationFiles>
<!-- supports wildcard or name pattern -->
<param>sample.properties</param>
<param>other.properties</param>
</classificationFiles>
<parallelTesting>false</parallelTesting>
<!-- optional, set true to group features by its Ids -->
<mergeFeaturesById>false</mergeFeaturesById>
<!-- optional, set true to get a final report with latest results of the same test from different test runs -->
<mergeFeaturesWithRetest>false</mergeFeaturesWithRetest>
<!-- optional, set true to fail build on test failures -->
<checkBuildResult>false</checkBuildResult>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>3.0.0-M4</version>
<configuration>
<testFailureIgnore>true</testFailureIgnore>
</configuration>
<dependencies>
<dependency>
<groupId>org.apache.maven.surefire</groupId>
<artifactId>surefire-junit47</artifactId>
<version>3.0.0-M4</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.4</version>
</plugin>
</plugins>
</build>
<reporting>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>2.2</version>
<reportSets>
<reportSet>
<reports>
<report>index</report>
<report>license</report>
<report>project-team</report>
<report>distribution-management</report>
<report>dependancy-info</report>
<report>scm</report>
<report>issue-tracking</report>
<report>cim</report>
<report>summary</report>
</reports>
<configuration>
<linkonly>false</linkonly>
</configuration>
</reportSet>
</reportSets>
</plugin>
</plugins>
</reporting>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-chrome-driver</artifactId>
<version>3.141.5</version>
</dependency>
<dependency>
<groupId>org.gdal</groupId>
<artifactId>gdal</artifactId>
<version>1.11.1</version>
</dependency>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-project</artifactId>
<version>2.2.1</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>org.apache.maven.plugin-tools</groupId>
<artifactId>maven-plugin-annotations</artifactId>
<version>3.6.0</version>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>3.141.59</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.12</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>io.cucumber</groupId>
<artifactId>cucumber-junit</artifactId>
<version>4.2.3</version>
</dependency>
<dependency>
<groupId>io.cucumber</groupId>
<artifactId>cucumber-jvm-deps</artifactId>
<version>1.0.6</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>io.cucumber</groupId>
<artifactId>cucumber-java</artifactId>
<version>4.2.3</version>
</dependency>
<dependency>
<groupId>io.cucumber</groupId>
<artifactId>cucumber-picocontainer</artifactId>
<version>4.2.3</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-server</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>io.appium</groupId>
<artifactId>java-client</artifactId>
<version>7.0.0</version>
</dependency>
<dependency>
<groupId>commons-configuration</groupId>
<artifactId>commons-configuration</artifactId>
<version>1.10</version>
</dependency>
<dependency>
<groupId>io.github.bonigarcia</groupId>
<artifactId>webdrivermanager</artifactId>
<version>4.1.0</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.5</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.6.4</version>
</dependency>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>7.1.0</version>
<scope>test</scope>
</dependency>
</dependencies>
Using above dependencies I am able to generate the 'Cucumber jvm report'.
Also I have written the code in java, for attaching the screen shot to report, I am taking screenshot only when the scenario get fail.
#After
public void CloseBrowser(Scenario scenario) {
if (scenario.isFailed()) {
System.out.println("Scenario is Failled Taking ScreenShot...!!!");
TakesScreenshot ts = (TakesScreenshot) driver;
byte[] screenshot = ts.getScreenshotAs(OutputType.BYTES);
scenario.embed(screenshot, "image/png");
}
}
I am not sure is there anything I am missing, but screen shot is not attaching to the report.
The default html report which is generated by cucumber is displaying the screen shot.
can some one please help me on this.
Thanks.
Can you check the screenshot are embedded on the After Hooks steps on the html report?, This 5.3.0 version is attaching the screenshot at Hooks step as we have our logic in #After hooks. I also first struggled and later noticed this.

DataNucleus enchancer cannot instantiate org.datanucleus.api.jdo.JDOAdapter

My code complies but when I try to run the DataNucleus enhancer, I am unable to get the post compilation step to complete. I presume I am missing a jar file but which one?? I have included the error and the pom.xml
I copy the instructions from the google pages:
<plugin>
<groupId>org.datanucleus</groupId>
<artifactId>maven-datanucleus-plugin</artifactId>
<version>3.2.0-m1</version>
<configuration>
<api>JDO</api>
<props>${basedir}/datanucleus.properties</props>
<verbose>true</verbose>
<enhancerName>ASM</enhancerName>
</configuration>
<executions>
<execution>
<phase>process-classes</phase>
<goals>
<goal>enhance</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-api-jdo</artifactId>
<version>3.1.3</version>
</dependency>
</dependencies>
</plugin>
And I get this error.
And I get this error.
[ERROR] --------------------
[ERROR] Standard error from the DataNucleus tool + org.datanucleus.enhancer.DataNucleusEnhancer :
[ERROR] --------------------
[ERROR] Exception in thread "main" Error : An error occurred trying to instantiate an instance of the API adapter "org.datanucleus.api.jdo.JDOAdapter" (perhaps you dont have the requisite datanucleus-api-XXX jar in the CLASSPATH, or the
jar for the persistence spec you are using?) : {1}
org.datanucleus.exceptions.NucleusUserException: Error : An error occurred trying to instantiate an instance of the A
adapter "org.datanucleus.api.jdo.JDOAdapter" (perhaps you dont have the requisite datanucleus-api-XXX jar in the CLAS
TH, or the api jar for the persistence spec you are using?) : {1}
at org.datanucleus.api.ApiAdapterFactory.getApiAdapter(ApiAdapterFactory.java:104)
at org.datanucleus.AbstractNucleusContext.(AbstractNucleusContext.java:115)
at org.datanucleus.enhancer.EnhancementNucleusContextImpl.(EnhancementNucleusContextImpl.java:48)
at org.datanucleus.enhancer.EnhancementNucleusContextImpl.(EnhancementNucleusContextImpl.java:37)
at org.datanucleus.enhancer.DataNucleusEnhancer.(DataNucleusEnhancer.java:161)
at org.datanucleus.enhancer.CommandLineHelper.createDataNucleusEnhancer(CommandLineHelper.java:148)
at org.datanucleus.enhancer.DataNucleusEnhancer.main(DataNucleusEnhancer.java:1108)
<?xml version="1.0" encoding="UTF-8"?>
<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">
<modelVersion>4.0.0</modelVersion>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<groupId>com.thechrisoneil.mygroupstogo</groupId>
<artifactId>mygroupstogo</artifactId>
<properties>
<appengine.app.version>1</appengine.app.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<prerequisites>
<maven>3.1.0</maven>
</prerequisites>
<dependencies>
<!-- Compile/runtime dependencies, as defined by Google default maven project -->
<!-- https://cloud.google.com/appengine/docs/java/tools/maven -->
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-1.0-sdk</artifactId>
<version>1.9.18</version>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-endpoints</artifactId>
<version>1.9.18</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<version>1</version>
</dependency>
<dependency>
<groupId>javax.jdo</groupId>
<artifactId>jdo-api</artifactId>
<version>3.1.3</version>
</dependency>
<!-- Dependencies added for datastorage persistents -->
<!-- Datanucleaus (http://www.datanucleus.org/products/datanucleus/jdo/maven.html) -->
<dependency>
<groupId>com.google.appengine.orm</groupId>
<artifactId>datanucleus-appengine</artifactId>
<version>2.1.2</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>3.1.3</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-api-jdo</artifactId>
<version>3.1.3</version>
</dependency>
<!-- Test Dependencies -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>1.9.5</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-testing</artifactId>
<version>1.9.18</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-stubs</artifactId>
<version>1.9.18</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.jdo</groupId>
<artifactId>jdo-api</artifactId>
<version>3.0.1</version>
</dependency>
</dependencies>
<build>
<!-- for hot reload of the web application -->
<outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/classes</outputDirectory>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>versions-maven-plugin</artifactId>
<version>2.1</version>
<executions>
<execution>
<phase>compile</phase>
<goals>
<goal>display-dependency-updates</goal>
<goal>display-plugin-updates</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<version>3.1</version>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.4</version>
<configuration>
<webXml>${project.build.directory}/generated-sources/appengine-endpoints/WEB-INF/web.xml</webXml>
<webResources>
<resource>
<!-- this is relative to the pom.xml directory -->
<directory>${project.build.directory}/generated-sources/appengine-endpoints</directory>
<!-- the list has a default value of ** -->
<includes>
<include>WEB-INF/*.discovery</include>
<include>WEB-INF/*.api</include>
</includes>
</resource>
<!--Development of groupstogo front end is imported to deployment server -->
<resource>
<directory>C:/software/angularjs/my-gtg/app</directory>
<filtering>true</filtering>
<includes>
<include>**/*.js</include>
<include>**/*.html</include>
<include>**/*.png</include>
<include>**/*.css</include>
</includes>
<targetPath>app</targetPath>
</resource>
</webResources>
</configuration>
</plugin>
<plugin>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-maven-plugin</artifactId>
<version>1.9.18</version>
<configuration>
<enableJarClasses>false</enableJarClasses>
<!-- Comment in the below snippet to bind to all IPs instead of just
localhost -->
<!-- address>0.0.0.0</address> <port>8080</port -->
<!-- Comment in the below snippet to enable local debugging with a remove
debugger like those included with Eclipse or IntelliJ -->
<!-- jvmFlags> <jvmFlag>-agentlib:jdwp=transport=dt_socket,address=8000,server=y,suspend=n</jvmFlag>
</jvmFlags -->
</configuration>
<executions>
<execution>
<goals>
<goal>endpoints_get_discovery_doc</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.datanucleus</groupId>
<artifactId>maven-datanucleus-plugin</artifactId>
<version>3.2.0-m1</version>
<configuration>
<api>JDO</api>
<props>${basedir}/datanucleus.properties</props>
<verbose>true</verbose>
<enhancerName>ASM</enhancerName>
</configuration>
<executions>
<execution>
<phase>process-classes</phase>
<goals>
<goal>enhance</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-api-jdo</artifactId>
<version>3.1.3</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</project>
I had the same problem and was able to solve it by comparing https://cloud.google.com/appengine/docs/java/datastore/jdo/overview-dn2 and http://www.datanucleus.org/products/accessplatform_3_2/jdo/maven.html
There might be a simple typo in Google's pom.xml snippet. As you can read on the DataNucleus page the maven plug-in will automatically use the latest available datanucleus core. To prevent this use:
<plugin>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-maven-plugin</artifactId>
<version>3.2.0-release</version>
<configuration>
<api>JDO</api>
<props>${basedir}/datanucleus.properties</props>
<verbose>true</verbose>
<enhancerName>ASM</enhancerName>
</configuration>
<executions>
<execution>
<phase>process-classes</phase>
<goals>
<goal>enhance</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>3.1.3</version>
</dependency>
</dependencies>
</plugin>
And the enhancer will work! So the difference is that Google used <artifactId>datanucleus-api-jdo</artifactId>
which wasn't necessary for me and of course it did not override the choice of the datanucleus-core version that should be used. Please also note that the plugin was renamed from maven-datanucleus-plugin to datanucleus-maven-plugin starting with 3.2.0-m2. So I also changed this to use the official 3.2.0-release.
Furthermore Google describes to use copies of the JARs found in appengine-java-sdk-1.9.21/lib/opt/user/datanucleus/v2 which are:
asm-4.0.jar
datanucleus-api-jdo-3.1.3.jar
datanucleus-api-jpa-3.1.3.jar
datanucleus-appengine-2.1.2.jar
datanucleus-core-3.1.3.jar
geronimo-jpa_2.0_spec-1.0.jar
jdo-api-3.0.1.jar jta-1.1.jar
But since I'm not using ant but maven I simply had to add this dependencies to pom.xml to be able to use JDO with DataNucleus with the versions explicitly supported by Google:
<dependency>
<groupId>javax.jdo</groupId>
<artifactId>jdo-api</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>3.1.3</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-api-jdo</artifactId>
<version>3.1.3</version>
</dependency>
<dependency>
<groupId>com.google.appengine.orm</groupId>
<artifactId>datanucleus-appengine</artifactId>
<version>2.1.2</version>
</dependency>
BTW: I spotted another bug in the pom.xml as provided by the current appengine-skeleton-archetype. The maven goal "appengine update" failed because the appengine-maven-plugin tried to upload my application with version set to 1.9.21. This is obviously the version of the used GAE SDK and not the version of my app. And it fails because it violates the allowed format for version ids as allowed by GAE. The fix was to correctly set the version in the plugin configuration by adding the line <version>${app.version}</version> like this:
<plugin>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-maven-plugin</artifactId>
<version>${appengine.version}</version>
<configuration>
<enableJarClasses>false</enableJarClasses>
<!-- Comment in the below snippet to bind to all IPs instead of just localhost -->
<!-- address>0.0.0.0</address>
<port>8080</port -->
<!-- Comment in the below snippet to enable local debugging with a remote debugger
like those included with Eclipse or IntelliJ -->
<!-- jvmFlags>
<jvmFlag>-agentlib:jdwp=transport=dt_socket,address=8000,server=y,suspend=n</jvmFlag>
</jvmFlags -->
<version>${app.version}</version>
</configuration>
</plugin>
Have fun!
I have my project building properly, being able to generate metaclasses and run the bytecode enhancer. But it's SBT, not Maven.
In case you are interested, please have a look at
http://github.com/frgomes/poc-scala-datanucleus

GWT 2.7 + GAE app looks for codeserver when deployed

Why does appengine try to use Super Dev Mode?
Every time I deploy my GWT app to appengine and try to access it I get the white loading screen, then after about 20-30 seconds I get this message:
I use maven with the gwt-maven-plugin and appengine-maven-plugin. Deploying using the maven-gae-plugin gives the same results.
If I switch back to using 2.6.1 versions of gwt and the gwt-maven-plugin it deploys ok, so it would seem it's something to do with the automatic dev mode launcher.
Some of my pom.xml
<build>
<outputDirectory>${webappDirectory}/WEB-INF/classes</outputDirectory>
<resources>
<resource>
<directory>src/main/resources</directory>
</resource>
<resource>
<directory>src/main/super</directory>
</resource>
<resource>
<directory>${project.build.directory}/generated-sources/apt</directory>
</resource>
<resource>
<directory>${project.build.directory}/generated-sources/gwt</directory>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>${target.jdk}</source>
<target>${target.jdk}</target>
<encoding>${project.build.sourceEncoding}</encoding>
<proc>none</proc>
</configuration>
</plugin>
<!-- JUnit Testing - skip *.GwtTest cases -->
<!-- 'mvn test' - runs the Jukito tests -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<includes>
<include>**/*Test.java</include>
</includes>
<excludes>
<exclude>**/*GwtTest.java</exclude>
<exclude>**/*JUnitTest.java</exclude>
</excludes>
</configuration>
</plugin>
<!-- GWT -->
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>gwt-maven-plugin</artifactId>
<version>${gwt-maven-plugin.version}</version>
<configuration>
<strict>true</strict>
<testTimeOut>180</testTimeOut>
<!-- With multiple tests use GwtTestSuite.java for speed -->
<includes>**/*GwtTest.java</includes>
<mode>htmlunit</mode>
<extraJvmArgs>-Xss1024k -Xmx2048M -XX:MaxPermSize=512M</extraJvmArgs>
<logLevel>INFO</logLevel>
<style>PRETTY</style>
<copyWebapp>true</copyWebapp>
<hostedWebapp>${webappDirectory}</hostedWebapp>
<server>com.google.appengine.tools.development.gwt.AppEngineLauncher</server>
<appEngineVersion>${gae.version}</appEngineVersion>
<appEngineHome>${gae.home}</appEngineHome>
<extraJvmArgs>-Dappengine.sdk.root=${gae.home}</extraJvmArgs>
<extraJvmArgs>-Ddatastore.default_high_rep_job_policy_unapplied_job_pct=20</extraJvmArgs>
<port>8888</port>
<runTarget>Project.html</runTarget>
<modules>
<module>com.utilitiessavings.usavappv7.Project</module>
</modules>
</configuration>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>test</goal>
</goals>
</execution>
</executions>
</plugin>
<!-- Google App Engine Deployment -->
<plugin>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-maven-plugin</artifactId>
<version>${gae.version}</version>
<configuration>
<enableJarSplitting>true</enableJarSplitting>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<!-- Google Web Toolkit dependencies -->
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-user</artifactId>
<version>${gwt.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-servlet</artifactId>
<version>${gwt.version}</version>
<scope>runtime</scope>
</dependency>
<!-- Google App Engine dependencies -->
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-1.0-sdk</artifactId>
<version>${gae.version}</version>
</dependency>
<!-- Testing -->
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-labs</artifactId>
<version>${gae.version}</version>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-stubs</artifactId>
<version>${gae.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-testing</artifactId>
<version>${gae.version}</version>
<scope>test</scope>
</dependency>
<!-- Persistence dependencies -->
<dependency>
<groupId>javax.persistence</groupId>
<artifactId>persistence-api</artifactId>
<version>${persistence-api.version}</version>
</dependency>
<dependency>
<groupId>com.googlecode.objectify</groupId>
<artifactId>objectify</artifactId>
<version>${objectify.version}</version>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>${javax.validation.version}</version>
</dependency>
<!-- Other dependencies -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>${servlet-api.version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
In my Project.gwt.xml
<add-linker name="xsiframe" />
(Tried removing this line but still got the same result)
Environment
Eclipse Luna (4.4.1)
Maven 3.2.3 (3.2.1 Embedded)
m2eclipse 1.5.0
gwt:compile tries to work "incrementally" by comparing the timestamp of the nocache.js file with the ones of the source files, and skipping GWT compilation if it thinks the output is up-to-date. This is brittle though. gwt:run (without <superDevMode>false</superDevMode>; and gwt:run-codeserver with launcherDir) will overwrite the nocache.js with a SuperDevMode-specific version, and this is likely to lead to gwt:compile skipping the compilation.
The takeaway is: when deploying or "releasing", make sure you first run mvn clean or force gwt:compile to run by passing -Dgwt.compiler.force to Maven.
Just for information, I had the same problem, caused by the usage of a non-standard project structure.
Maven was copying the .nocache files in a directory different than /target/which prevented the clean plugin from cleaning the generated files.
Adding a new with the directory where the files are copied solves the problem.

App Engine, JDO and Maven. Error on startup

I'm trying to create a simple test using JDO with App Engine and a Maven configuration.
My compile and data enhancement steps succeed. But at runtime (both mvn:test and appengine:devserver) I get:
1) Error in custom provider, javax.jdo.JDOFatalInternalException:
Class "com.google.appengine.datanucleus.DatastoreManager" was not found in the CLASSPATH.
Please check your specification and your CLASSPATH.
However, my classpath (target/demo/WEB-INF/lib) does contain: datanucleus-appengine-2.1.1.jar
And my dependencies are the same as those specified in the Google datanucleus project's POM:
<dependency>
<groupId>javax.jdo</groupId>
<artifactId>jdo-api</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>[3.1.1, 3.2)</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-api-jdo</artifactId>
<version>[3.1.1, 3.2)</version>
</dependency>
<dependency>
<groupId>com.google.appengine.orm</groupId>
<artifactId>datanucleus-appengine</artifactId>
<version>2.1.1</version>
</dependency>
Appreciate any suggestions.
RB
I have everything working now. I thought I'd share a couple of the gotchas (since it took me several days to plough through all of this):
1). All of the versions really matter (esp. matching the App Engine ORM 2.1.1 to DataNucleus 3.1.1 -- including the plugin).
http://www.datanucleus.org/products/accessplatform_3_2/datastores/appengine.html
Here's what I ended up with:
<dependency>
<groupId>javax.jdo</groupId>
<artifactId>jdo-api</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>3.1.1</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-api-jdo</artifactId>
<version>3.1.2</version>
</dependency>
<dependency>
<groupId>com.google.appengine.orm</groupId>
<artifactId>datanucleus-appengine</artifactId>
<version>2.1.2</version>
</dependency>
...
<plugin>
<groupId>org.datanucleus</groupId>
<artifactId>maven-datanucleus-plugin</artifactId>
<version>3.1.2</version>
<configuration>
<log4jConfiguration>${basedir}/log4j.properties</log4jConfiguration>
<verbose>false</verbose>
<fork>false</fork>
</configuration>
<executions>
<execution>
<phase>process-classes</phase>
<goals>
<goal>enhance</goal>
</goals>
</execution>
</executions>
</plugin>
2). Check the tail of the datanucleus.log to confirm that your classes were enhanced (via mvn datanucleus:enhance). I eventually realized that my test classes (in src/test) were being ignored.
I have added false in pom.xml and it works for me
<plugins>
<plugin>
<groupId>org.datanucleus</groupId>
<artifactId>maven-datanucleus-plugin</artifactId>
<version>3.1.2</version>
<configuration>
**<fork>false</fork>**
<log4jConfiguration>${basedir}/log4j.properties</log4jConfiguration>
<verbose>true</verbose>
</configuration>
<executions>
<execution>
<phase>process-classes</phase>
<goals>
<goal>enhance</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>

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