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Java: Can't find symbol: class name, when the class name in one of two packages with the same name [duplicate]

I use maven to build a multi module project. My module 2 depends on Module 1 src at compile scope and module 1 tests in test scope.
Module 2 -
<dependency>
<groupId>blah</groupId>
<artifactId>MODULE1</artifactId>
<version>blah</version>
<classifier>tests</classifier>
<scope>test</scope>
</dependency>
This works fine. Say my module 3 depends on Module1 src and tests at compile time.
Module 3 -
<dependency>
<groupId>blah</groupId>
<artifactId>MODULE1</artifactId>
<version>blah</version>
<classifier>tests</classifier>
<scope>compile</scope>
</dependency>
When I run mvn clean install, my build runs till module 3, fails at module 3 as it couldn't resolve the module 1 test dependency. Then I do a mvn install on module 3 alone, go back and run mvn install on my parent pom to make it build. How can I fix this?

I have a doubt about what you are trying to do but but I'll assume you want to reuse the tests that you have created for a project (module1) in another. As explained in the note at the bottom of the Guide to using attached tests:
Note that previous editions of this guide suggested to use <classifier>tests</classifier> instead of <type>test-jar</type>. While this currently works for some cases, it does not properly work during a reactor build of the test JAR module and any consumer if a lifecycle phase prior to install is invoked. In such a scenario, Maven will not resolve the test JAR from the output of the reactor build but from the local/remote repository. Apparently, the JAR from the repositories could be outdated or completely missing, causing a build failure (cf. MNG-2045).
So, first, to package up compiled tests in a JAR and deploy them for general reuse, configure the maven-jar-plugin as follows:
<project>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.2</version>
<executions>
<execution>
<goals>
<goal>test-jar</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
Then, install/deploy the test JAR artifact as usual (using mvn install or mvn deploy).
Finally, to use the test JAR, you should specify a dependency with a specified type of test-jar:
<project>
...
<dependencies>
<dependency>
<groupId>com.myco.app</groupId>
<artifactId>foo</artifactId>
<version>1.0-SNAPSHOT</version>
<type>test-jar</type>
<scope>test</scope>
</dependency>
</dependencies>
...
</project>

Regarding to my comment to Pascals question i think i have found a stuitable answer :
<plugins>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>2.2</version>
<executions>
<execution>
<goals>
<goal>test-jar</goal>
</goals>
<phase>test-compile</phase>
</execution>
</executions>
<configuration>
<outputDirectory>${basedir}\target</outputDirectory>
</configuration>
</plugin>
</plugins>
The main difference here as you see here is the <phase> tag.
I will create the test-jar and it will be available in the compile phase of the tests and not only after the package phase.
Works for me.

How do you replace the class of a Maven dependency?

There is a class in a maven dependency that is incompatible with Java 8.
How do you properly fix that problem?
Right now I'm doing the following:
Create a package with the same name
Create a class with the same name in that package
Copy and paste the code
Fix the incompatible API call
The problem is that this class contains API calls to restricted classes and although I changed the Eclipse compiler settings (Window -> Preferences -> Java -> Compiler -> Error/Warnings -> Deprecated and restricted API -> Forbidden reference (access rule): Error -> Warning) to allow access the project will only compile sometimes. If it doesn't compile I'll get a "can't find symbol" error.
Edit:
Here are the details you asked for:
Dependency: http://mvnrepository.com/artifact/com.sun.xml.wss/xws-security/3.0
Class: EncryptionProcessor
Necessary change:
// Change line 1053 FROM:
// _dataEncryptor = XMLCipher.getInstance(dataEncAlgo, _dataCipher);
// TO:
_dataEncryptor = XMLCipher.getInstance(dataEncAlgo);
Edit-2:
Maven build error:
[ERROR] symbol: class XMLCipher
[ERROR] location: class com.sun.xml.wss.impl.apachecrypto.EncryptionProcessor
[ERROR] /C:/Users/{name}/development/eclipse_workspace/git/xws-security/src/main/java/com/sun/xml/wss/impl/apachecrypto/EncryptionProcessor.java:[1482,98] cannot find symbol

Here is a detailed guide describing what I did exactly:
Create new Maven project in Eclipse
Configure Maven settings of new project (Important: Use the same group and artifact ID and only change the version number)
<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>com.sun.xml.wss</groupId>
<artifactId>xws-security</artifactId>
<version>3.0-java8-fix</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</properties>
</project>
Add dependency of bugged JAR
<dependencies>
<dependency>
<groupId>com.sun.xml.wss</groupId>
<artifactId>xws-security</artifactId>
<version>3.0</version>
<exclusions>
<exclusion>
<artifactId>xmldsig</artifactId>
<groupId>javax.xml.crypto</groupId>
</exclusion>
<exclusion>
<artifactId>activation</artifactId>
<groupId>javax.activation</groupId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
Create Java file in the same package of class that needs to be fixed
package com.sun.xml.wss.impl.apachecrypto;
public class EncryptionProcessor {
// The FIX goes here
}
Add Maven shade build plug in to handle creation of patched JAR file (this is not the only plug in to handle this kind of task - e.g. dependency:unpack)
<build>
<plugins>
<!-- plug in for creation of patched JAR file -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<filters>
<filter>
<artifact>com.sun.xml.wss:xws-security:3.0</artifact>
<includes>
<include>**/*.class</include>
<include>**/*.xml</include>
</includes>
<excludes>
<exlude>
com/sun/xml/wss/impl/apachecrypto/EncryptionProcessor.class
</exlude>
</excludes>
</filter>
</filters>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
Include patched JAR in other projects as necessary (Note: If you experience ClassNotFoundExceptions or similar errors do this: Right-click on the project -> Properties -> Maven -> "Resolve dependencies from Workspace projects":false)
In case you are not familiar with Maven. Here is the complete pom.xml: http://pastebucket.com/88444

Similar to Steven S.'s answer, but using the maven-dependency-plugin. Based on this blog post.
I changed the name of the patched library (not the version), but it depends on your needs what works better for you.
The dependency on the original library should be marked as <optional>true</optional>. Otherwise, the projects that depend on your patched library will also depend on the original library, which means that both the patched and the original version will be on the classpath, which can lead to all kinds of problems.
If your project is a child project, you can still use a completely different groupId and version than your parent pom. Doesn't matter.
You can exclude the classes you patch from unpacking, but it's probably not necessary, because Maven will first unpack the original library and then compile your new version, which means that the original classes are overwritten. Nice!
<?xml version="1.0"?>
<project xmlns="http://maven.apache.org/POM/4.0.0">
<modelVersion>4.0.0</modelVersion>
<!-- remove this if you don't have a parent pom -->
<parent>
<groupId>my.company</groupId>
<artifactId>my.company</artifactId>
<version>1.2.3</version>
<relativePath>../pom.xml</relativePath>
</parent>
<groupId>com.foo</groupId>
<artifactId>foo-bar-patched</artifactId>
<version>4.5.6</version>
<build>
<plugins>
<plugin>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>unpack</goal>
</goals>
<configuration>
<artifactItems>
<artifactItem>
<groupId>com.foo</groupId>
<artifactId>foo-bar</artifactId>
<outputDirectory>${project.build.directory}/classes</outputDirectory>
<!-- excludes are probably not necessary -->
<!-- <excludes>**/Foo.class,**/Bar.class</excludes> -->
</artifactItem>
</artifactItems>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>com.foo</groupId>
<artifactId>foo-bar</artifactId>
<version>4.5.6</version>
<optional>true</optional>
</dependency>
</dependencies>
</project>

General solution:
download all project sources
apply your modification
use version control so that change isn't lost
change version in pom.xml, for example from 3.0 to 3.0-patched
launch maven build
copy generated artifacts to you repository/Artifactory, if you use one
change dependency version in your own project

Running spock unit tests with Maven

On a previous project I used the Spock testing framework to unit test my Java code. I found this really productive so I am trying to add Spock tests to my current project which uses Maven as its build tool (The previous project used Gradle). While I can get Maven to compile my Spock tests (using groovy-eclipse-compiler), I am unable to get Maven to run the tests.
I've made a simple example to demonstrate my problem with 2 files:
pom.xml
src/test/java/ASpec.groovy
Contents of pom.xml:
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>my.group</groupId>
<artifactId>my-artifact</artifactId>
<version>0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
<version>2.0.8</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.spockframework</groupId>
<artifactId>spock-core</artifactId>
<version>0.7-groovy-2.0</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<compilerId>groovy-eclipse-compiler</compilerId>
</configuration>
<dependencies>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-compiler</artifactId>
<version>2.8.0-01</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-batch</artifactId>
<version>2.1.8-01</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</project>
Contents of ASpec.groovy:
import spock.lang.Specification
class ASpec extends Specification {
def "Test A"(){
// Always fail
expect: false
}
}
When I execute mvn clean test (or mvn clean install) I would expect my single unit test to be run and fail. While it is compiled, Maven does not run it. Does any one know how to run a Spock unit test from Maven (or if it is possible?)
(I have not put my test in a package to keep the example simple. Also I have put my groovy code in src/test/java to avoid configuring the example to pick up source files from an additional directory, again to keep the example as simple as possible.)

This answer is purely supplemental to #PeterNiederwieser's answer. In it he mentions that you can configure the name pattern used by Surefire. Here is an example of what worked for me:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.18</version>
<configuration>
<includes>
<!-- By default only files ending in 'Test' will be included, so also include support for Spock style naming convention -->
<!-- Oddly enough for Groovy files, *Spec.groovy does not work, but *Spec.java does -->
<include>**/*Test.java</include>
<include>**/*Spec.java</include>
</includes>
</configuration>
</plugin>
Source
As I mention in the comments, I'm not sure why **/*Spec.groovy didn't work, but I'm happy to be able to use the normal Spock convention here.

Maven Surefire finds test classes by their name. Either change the class name to ATest, or reconfigure the name pattern used by Surefire. The POM for the spock-example project demonstrates how to do the latter.

I had the same requirement to add Spock to my existing java web app.
I tried Peters but it did not work for me.
gmavenplus-plugin somehow (no idea) replaced my guava dependency with a very old google lib and my Spring application broke complaining about a non-existent method.
After literally maybe 2 or 3 dozen attempts, I finally was able to integrate my Spock Unit tests, and Integration tests and more importantly to isolate the compilation of the Spock groovy classes from my existing Java/Junit Spring/Hibernate application.
Of course if I had gradle it would have solved the issue...but this is a legacy project and therefore I had not the choice.
Below are the plugins I added.
Please note the Spock unit tests end with Spec.
The Spock integration tests end with IT (but most probably should be SpecIT).
I put my Spock tests under src/test/groovy.
<plugins>
<plugin>
<groupId>org.codehaus.gmavenplus</groupId>
<artifactId>gmavenplus-plugin</artifactId>
<version>1.4</version>
<executions>
<execution>
<!-- Without joint compilation - no dependencies between Java and Groovy (inheritance)-->
<goals>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
<configuration>
<sources>
<source>
<directory>${project.basedir}/src/main/java/groovy</directory>
<includes>
<include>**/*.groovy</include>
</includes>
</source>
</sources>
<testSources>
<testSource>
<directory>${project.basedir}/src/test/groovy</directory>
<includes>
<include>**/*.groovy</include>
</includes>
</testSource>
</testSources>
</configuration>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.18.1</version>
<configuration>
<testSourceDirectory>src/test/groovy</testSourceDirectory>
<testSourceDirectory>src/test/java</testSourceDirectory>
<includes>
<include>**/*Spec.java</include>
<!-- Yes, .java extension -->
<include>**/*Test.java</include>
<!-- Just in case having "normal" JUnit tests -->
</includes>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-failsafe-plugin</artifactId>
<version>2.20</version>
<configuration>
<useFile>false</useFile>
<includes>
<include>**/*IT.java</include>
</includes>
</configuration>
<executions>
<execution>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
And here are my dependencies:
<!--Spock -->
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy</artifactId>
<version>2.4.7</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.spockframework</groupId>
<artifactId>spock-core</artifactId>
<version>1.1-groovy-2.4</version>
</dependency>
<dependency>
<groupId>org.spockframework</groupId>
<artifactId>spock-spring</artifactId>
<version>1.1-groovy-2.4</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy.modules.http-builder</groupId>
<artifactId>http-builder</artifactId>
<version>0.7.1</version>
</dependency>
<!--Spock mocking dependencies -->
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib-nodep</artifactId>
<version>3.2.5</version>
</dependency>
<dependency>
<groupId>org.objenesis</groupId>
<artifactId>objenesis</artifactId>
<version>2.6</version>
</dependency>
And just to let you know, my original POM had absolutely no explicit plugins AT ALL. So I had a very simply POM for my project. So, it should work for you.
It is a Java 1.7 project.
...and finally, just to give you some confidence that this is not a rubbish post, I did multiple tests in order to ensure the above worked:
Just build the WAR without the tests and deploy and smoke test it locally
mvn clean install -DskipTests -Dmaven.test.skip=true
Do a test compile and see if the Groovy Unit tests get compiled as well
mvn -X clean test-compile
Do a clean install without the Integration test (i made sure it was failing for this test) and see if the Groovy unit tests are run
mvn clean install -DskipITs
Just run the integration test
mvn failsafe:integration-test
I would have liked to include screenshots of the above as proof but it would have had to be censored...So, I sincerely hope this helps you, as I was going mental trying to get this working...Maven is a huge subject area. Good luck :=)

A problem I encountered is incompatible dependencies.
The spock-core dependency of course pulls in a dependency on the version of groovy it needs. But it is possible that other dependencies or plugins (I think thegmaven-plus plugin in my case) pull in a different, incompatible, version of groovy.
I fixed the problem by explicitly giving a dependency on the groovy package I wanted to use.

Maven plugin not running where I want it to

I have a maven project that I want to load properties from a file when things happen. I've got the codehaus properties-maven-plugin and I need it to run automagically.
If I run mvn test or mvn compile, the task plugin load the properties file just fine.
I see this in the output:
[INFO] --- properties-maven-plugin:1.0-alpha-2:read-project-properties (default)...---
When I run mvn flyway:init, say, I do not see it run and the properties do not get loaded.
Here is the pom.xml:
<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>net.foo</groupId>
<artifactId>workflow</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Foo Framework</name>
<description>Foo framework</description>
<properties>
<postgre.version>9.1-901.jdbc4</postgre.version>
<flyway.version>2.2.1</flyway.version>
</properties>
<dependencies>
<dependency>
<groupId>postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>${postgre.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>com.googlecode.flyway</groupId>
<artifactId>flyway-maven-plugin</artifactId>
<version>2.2.1</version>
<configuration>
<url>${url}</url>
<user>${user}</user>
<password>${pass}</password>
<locations>
<location>classpath:sql/pgsql</location>
</locations>
</configuration>
<dependencies>
<dependency>
<groupId>postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>${postgre.version}</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>properties-maven-plugin</artifactId>
<version>1.0-alpha-2</version>
<executions>
<execution>
<phase>initialize</phase>
<goals>
<goal>read-project-properties</goal>
</goals>
<configuration>
<files>
<file>src/main/resources/db.properties</file>
</files>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
Can anyone suggest what I can do, or some documentation I can read to make this work? I have read plenty of maven documentation and cannot seem to understand it well enough to make this happen. I thought what I have here would make it run during the initialize phase, but evidently not...

You are close. There is a difference between running Maven using a phase, and using a goal. Start with a quick review of the Maven lifecycle documentation.
When you run mvn compile, Maven runs all goals bound to the compile phase, plus anything bound to earlier phases. You have bound the properties:read-project-properties goal to the initialize phase. initialize is one of the first phases, so read-project-properties executes when compile, or test, or any of the later phases are used in the command.
When you run mvn flyway:init, you are only running a single goal, not the entire lifecycle. Thus, the only thing that runs with that command is the flyway-maven-plugin's init goal, nothing else.
If you want those two goals to run together, you could try binding the flyway:init goal to the initialize phase (if that is not the default; I could not tell from reading the plugin's documentation). Then, mvn initialize will run both.
If you don't want to bind flyway:init to a phase, then you may run both goals explicitly with mvn flyway:init initialize.

mvn generate-sources fails, why isn't xml beans on classpath?

I'm trying to generate java classes for OGC KML 2.2 as part of the maven generate-sources process using the org.codehaus.mojo xmlbeans-maven-plugin. The java code appears to be generated correctly, but I get tons of errors during compilation complaining that 'package org.apache.xmlbeans'. XMLBeans is clearly a dependency, it exists in my ~/.m2 repository, and I've been peek in the jar to make sure the classes are there. It looks like XMLBeans is successfully generating java files in target/generated-sources, but somehow its absent from the classpath during compilation.
I've tried changing the scope of the org.apache.xmlbeans dependency, but to no avail.
Here's the pom.xml
<modelVersion>4.0.0</modelVersion>
<groupId>net.opengis</groupId>
<artifactId>ogc-kml</artifactId>
<version>2.2.0</version>
<packaging>pom</packaging>
<name>ogc-kml</name>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>xmlbeans-maven-plugin</artifactId>
<version>2.3.3</version>
<executions>
<execution>
<goals>
<goal>xmlbeans</goal>
</goals>
</execution>
</executions>
<inherited>true</inherited>
<configuration>
<download>true</download>
<schemaDirectory>src/main/xsd</schemaDirectory>
</configuration>
</plugin>
</plugins>
</build>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.apache.xmlbeans</groupId>
<artifactId>xmlbeans</artifactId>
<version>2.6.0</version>
</dependency>
</dependencies>
</dependencyManagement>
The project consists of a single src/main/xsd folder containing the two xsds from http://schemas.opengis.net/kml/2.2.0/. The entire folder structure is at https://github.com/iancw/maven-xmlbeans-question.
I can compile the classes by hand if I put the xmlbeans jar from my ~/.m2 repo on the classpath, e.g.
xmlbeans$ javac -classpath ~/.m2/repository/org/apache/xmlbeans/xmlbeans/2.4.0/xmlbeans-2.4.0.jar org/w3/x2005/atom/*.java org/w3/x2005/atom/impl/*.java net/opengis/kml/x22/*.java x0/oasisNamesTcCiqXsdschemaXAL2/*.java x0/oasisNamesTcCiqXsdschemaXAL2/impl/*.java net/opengis/kml/x22/*.java net/opengis/kml/x22/impl/*.java
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
xmlbeans$
I've looked through a number of examples and it seems like I'm doing this right. I haven't seen anyone else complain of this issue. Any maven mavens have suggestions?
(A curious side note is that although i've tried both 2.4.0 and 2.6.0 of the xmlbeans dependency, maven hasn't ever seemed to download the 2.6.0 version into my repository)

From the POM file that you've included in your question you have only defined the xmlbeans dependency in the dependencyManagement section. You also need to define it in your dependencies section of your POM before it will be included in the classpath at build time.
So for example your POM would be:
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>xmlbeans-maven-plugin</artifactId>
...
</plugin>
</plugins>
</build>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.apache.xmlbeans</groupId>
<artifactId>xmlbeans</artifactId>
<version>2.6.0</version>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<groupId>org.apache.xmlbeans</groupId>
<artifactId>xmlbeans</artifactId>
</dependencies>

One Additional issue that may look similar,
Check your java install jdk and ext folders for older beans jar.
The plugin puts the project dependencies at the end of the classpath.