[
http://jira.codehaus.org/browse/MNG-4815?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Benjamin Bentmann closed MNG-4815.
----------------------------------
Resolution: Fixed
Fix Version/s: 3.0
Assignee: Benjamin Bentmann
Improved in
[r1000091|http://svn.apache.org/viewvc?view=revision&revision=1000091].
> (3.0-RC1) Maven Java API does not give nice error messages when improperly
> configured
> -------------------------------------------------------------------------------------
>
> Key: MNG-4815
> URL: http://jira.codehaus.org/browse/MNG-4815
> Project: Maven 2 & 3
> Issue Type: Improvement
> Components: Errors
> Affects Versions: 3.0-beta-3
> Environment: Maven 3.0-RC1
> Reporter: Lincoln Baxter, III
> Assignee: Benjamin Bentmann
> Fix For: 3.0
>
>
> I get nullpointers all over the place if I do not set up the configuration
> options exactly as maven requires them. This is fine, but not a very friendly
> experience for developers trying to figure out how to use the API.
> This is a correct/simple bootstrap (see below,) but if any or many of the
> methods are not called "just so" a nullpointer will result. Better error
> messages should be provided, such as:
> "No LocalRepositoryManager was configured in the RespositorySession - this
> may not be null."
> Etc...
> {noformat}
> /*
> * JBoss, Home of Professional Open Source
> * Copyright 2010, Red Hat, Inc., and individual contributors
> * by the @authors tag. See the copyright.txt in the distribution for a
> * full listing of individual contributors.
> *
> * This is free software; you can redistribute it and/or modify it
> * under the terms of the GNU Lesser General Public License as
> * published by the Free Software Foundation; either version 2.1 of
> * the License, or (at your option) any later version.
> *
> * This software is distributed in the hope that it will be useful,
> * but WITHOUT ANY WARRANTY; without even the implied warranty of
> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> * Lesser General Public License for more details.
> *
> * You should have received a copy of the GNU Lesser General Public
> * License along with this software; if not, write to the Free
> * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
> * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
> */
> package org.jboss.arqmvn;
> import java.io.File;
> import java.util.ArrayList;
> import org.apache.maven.artifact.repository.ArtifactRepository;
> import org.apache.maven.artifact.repository.ArtifactRepositoryPolicy;
> import org.apache.maven.artifact.repository.MavenArtifactRepository;
> import org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout;
> import org.apache.maven.project.DefaultProjectBuildingRequest;
> import org.apache.maven.project.ProjectBuilder;
> import org.apache.maven.project.ProjectBuildingException;
> import org.apache.maven.project.ProjectBuildingRequest;
> import org.apache.maven.project.ProjectBuildingResult;
> import org.codehaus.plexus.DefaultPlexusContainer;
> import org.codehaus.plexus.logging.console.ConsoleLoggerManager;
> import org.sonatype.aether.impl.internal.SimpleLocalRepositoryManager;
> import org.sonatype.aether.util.DefaultRepositorySystemSession;
> /**
> * @author <a href="mailto:lincolnbax...@gmail.com";>Lincoln Baxter, III</a>
> */
> public class MavenFacet
> {
> private final ProjectBuildingRequest request = new
> DefaultProjectBuildingRequest();
> private DefaultPlexusContainer container = null;
> private ProjectBuilder builder = null;
> private void bootstrapMaven()
> {
> if (!initialized())
> {
> try
> {
> container = new DefaultPlexusContainer();
> ConsoleLoggerManager loggerManager = new ConsoleLoggerManager();
> loggerManager.setThreshold("ERROR");
> container.setLoggerManager(loggerManager);
> builder = container.lookup(ProjectBuilder.class);
> // TODO this needs to be configurable via the project/.sidekick
> file.
> String localRepository = getUserHomeDir().getAbsolutePath() +
> "/.m2/repository";
> request.setLocalRepository(new MavenArtifactRepository(
> "local", new
> File(localRepository).toURI().toURL().toString(),
> container.lookup(ArtifactRepositoryLayout.class),
> new ArtifactRepositoryPolicy(true,
> ArtifactRepositoryPolicy.UPDATE_POLICY_NEVER,
> ArtifactRepositoryPolicy.CHECKSUM_POLICY_WARN),
> new ArtifactRepositoryPolicy(true,
> ArtifactRepositoryPolicy.UPDATE_POLICY_NEVER,
>
> ArtifactRepositoryPolicy.CHECKSUM_POLICY_WARN)));
> request.setRemoteRepositories(new
> ArrayList<ArtifactRepository>());
> DefaultRepositorySystemSession repositorySession = new
> DefaultRepositorySystemSession();
> repositorySession.setLocalRepositoryManager(new
> SimpleLocalRepositoryManager(localRepository));
> repositorySession.setOffline(true);
> request.setRepositorySession(repositorySession);
> request.setProcessPlugins(true);
> request.setResolveDependencies(true);
> // request.setOffline(true);
> }
> catch (Exception e)
> {
> throw new RuntimeException(e);
> }
> }
> }
> private boolean initialized()
> {
> return request == null;
> }
> /*
> * POM manipulation methods
> */
> public ProjectBuildingResult getProjectBuildingResult()
> {
> bootstrapMaven();
> try
> {
> ProjectBuildingResult buildingResult = builder.build(getPOMFile(),
> request);
> return buildingResult;
> }
> catch (ProjectBuildingException e)
> {
> throw new RuntimeException(e);
> }
> }
> private File getPOMFile()
> {
> File file = new File("pom.xml");
> return file;
> }
> private File getUserHomeDir()
> {
> return new File(System.getProperty("user.home")).getAbsoluteFile();
> }
> }
> {noformat}
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