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Posted to users@maven.apache.org by Fabien Coppens <fa...@free.fr> on 2009/09/21 14:08:30 UTC
Problem with Maven Embedder 3.0 : protocol not found error
Hi all.
I am trying to use Maven Embedder 3.0-alpha-2 (latest version to be found on the
central repository), and am running into a problem when running a build on a
specified POM (see code below) : the POM in question references artefacts which
are on our central Archiva repository, accessible by simple http, but the
embedder is giving me the following errors, as if it couldn't recognize the
protocol :
[WARNING] repository metadata for: 'snapshot com.acme.Parent:1.2-SNAPSHOT' could
not be retrieved from repository:
http://repo-maven-dsi/archiva/repository/releases due to an error: Unsupported
Protocol: '': Cannot find wagon which supports the requested protocol:
As you can see, the console reads Unsupported Protocol: ''
When I tell the embedder to build a project whose POM is available on my local
file system, everything works fine.
Here is the code I'm using :
package com.acme.dependencyanalyzer;
import java.io.File;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import org.apache.maven.artifact.Artifact;
import org.apache.maven.embedder.Configuration;
import org.apache.maven.embedder.ConfigurationValidationResult;
import org.apache.maven.embedder.DefaultConfiguration;
import org.apache.maven.embedder.MavenEmbedder;
import org.apache.maven.embedder.MavenEmbedderException;
import org.apache.maven.execution.DefaultMavenExecutionRequest;
import org.apache.maven.execution.MavenExecutionRequest;
import org.apache.maven.execution.MavenExecutionResult;
import org.apache.maven.model.Dependency;
import org.apache.maven.project.MavenProject;
import org.apache.maven.project.MavenProjectBuilder;
import org.codehaus.plexus.PlexusContainer;
public class ArtefactManager {
private static String pomDir =
"c:\\\\devhome\\snapshots\\22.0\\VscFwk_1.7_Dev\\dev2_stg\\VscFwk";
//private static String pomDir =
"c:\\\\devhome\\workspaces\\Fabien_Workspace_Europa\\maven-dependency-plugin-2.1";
private static String settingsDir = "c:\\\\Documents and
Settings\\fabien_coppens\\.m2";
/**
* @param args
*/
public static void main(String[] args) {
File user = new File(settingsDir, "settings.xml");
File baseDirectory = new File(pomDir);
System.out.println("settings file "+user.toString());
System.out.println("project dir "+baseDirectory.toString());
Configuration configuration = new DefaultConfiguration()
.setUserSettingsFile(user)
.setClassLoader(Thread.currentThread().getContextClassLoader());
ConfigurationValidationResult validationResult =
MavenEmbedder.validateConfiguration(configuration);
if (validationResult.isValid())
{
try {
MavenEmbedder embedder = new MavenEmbedder(configuration);
/*
MavenExecutionRequest request = new DefaultMavenExecutionRequest()
.setBaseDirectory(baseDirectory)
.setGoals(Arrays.asList(new String[]{"clean", "install"}));
*/
MavenExecutionRequest request = defineRequest(baseDirectory);
MavenExecutionResult result = embedder.execute(request);
if (null == result) {
System.out.println("result is null !!");
}
if (result.hasExceptions())
{
System.out.println("Exceptions in Maven execute result :
"+((Exception)result.getExceptions().get(0)).getMessage());
}
//
----------------------------------------------------------------------------
// You may want to inspect the project after the execution.
//
----------------------------------------------------------------------------
MavenProject project = result.getProject();
if (null == project) {
System.out.println("project is null !!");
}
// Do something with the project
String groupId = project.getGroupId();
String artifactId = project.getArtifactId();
String version = project.getVersion();
String name = project.getName();
List dependencies = project.getDependencies();
if (null != dependencies) {
System.out.println("Number of project dependencies :
"+dependencies.size());
for (Iterator i = dependencies.iterator(); i.hasNext();) {
Dependency dep = (Dependency) i.next();
System.out.println("Dependency "+i+" : "+dep.getArtifactId());
}
}
List runtimeDependencies = project.getRuntimeDependencies();
if (null != runtimeDependencies) {
System.out.println("Number of runtime dependencies :
"+runtimeDependencies.size());
for (Iterator i = runtimeDependencies.iterator(); i.hasNext();) {
Dependency dep = (Dependency) i.next();
System.out.println("Runtime Dependency "+i+" :
"+dep.getArtifactId());
}
}
Set artifacts = project.getArtifacts();
if (null != artifacts) {
System.out.println("Number of artifacts : "+artifacts.size());
for (Iterator i = artifacts.iterator(); i.hasNext();) {
Artifact art = (Artifact) i.next();
System.out.println("Artifact "+i+" : "+art.getId());
}
}
}
catch(MavenEmbedderException e) {
System.out.println("MavenEmbedderException : "+e.getMessage());
}
}
else
{
if (null != validationResult.getUserSettingsException()) {
System.out.println("Error occurred in configuration validation :
"+validationResult.getUserSettingsException().getMessage());
}
else if (null != validationResult.getGlobalSettingsException()) {
System.out.println("Error occurred in configuration validation :
"+validationResult.getGlobalSettingsException().getMessage());
}
else {
System.out.println("Error occurred in configuration validation");
}
}
}
private static MavenExecutionRequest defineRequest(File baseDirectory) {
MavenExecutionRequest request = new DefaultMavenExecutionRequest()
.setBaseDirectory(baseDirectory)
.setGoals(Arrays.asList(new String[]{"clean", "install"}));
return request;
}
}
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Re: Problem with Maven Embedder 3.0 : protocol not found error
Posted by Brett Porter <br...@apache.org>.
You need to add wagon-http-lightweight to the classpath along with the
embedder. However, I don't think that will guarantee that this works -
the last 3.0 embedder release is probably not stable enough.
You're better off directly using the maven-core library and
dependencies from 2.2.1 at this stage.
- Brett
On 21/09/2009, at 10:08 PM, Fabien Coppens wrote:
> Hi all.
> I am trying to use Maven Embedder 3.0-alpha-2 (latest version to be
> found on the
> central repository), and am running into a problem when running a
> build on a
> specified POM (see code below) : the POM in question references
> artefacts which
> are on our central Archiva repository, accessible by simple http,
> but the
> embedder is giving me the following errors, as if it couldn't
> recognize the
> protocol :
>
> [WARNING] repository metadata for: 'snapshot com.acme.Parent:1.2-
> SNAPSHOT' could
> not be retrieved from repository:
> http://repo-maven-dsi/archiva/repository/releases due to an error:
> Unsupported
> Protocol: '': Cannot find wagon which supports the requested protocol:
>
> As you can see, the console reads Unsupported Protocol: ''
> When I tell the embedder to build a project whose POM is available
> on my local
> file system, everything works fine.
>
> Here is the code I'm using :
>
> package com.acme.dependencyanalyzer;
>
> import java.io.File;
> import java.util.Arrays;
> import java.util.Iterator;
> import java.util.List;
> import java.util.Set;
>
> import org.apache.maven.artifact.Artifact;
> import org.apache.maven.embedder.Configuration;
> import org.apache.maven.embedder.ConfigurationValidationResult;
> import org.apache.maven.embedder.DefaultConfiguration;
> import org.apache.maven.embedder.MavenEmbedder;
> import org.apache.maven.embedder.MavenEmbedderException;
> import org.apache.maven.execution.DefaultMavenExecutionRequest;
> import org.apache.maven.execution.MavenExecutionRequest;
> import org.apache.maven.execution.MavenExecutionResult;
> import org.apache.maven.model.Dependency;
> import org.apache.maven.project.MavenProject;
> import org.apache.maven.project.MavenProjectBuilder;
> import org.codehaus.plexus.PlexusContainer;
>
> public class ArtefactManager {
>
>
> private static String pomDir =
> "c:\\\\devhome\\snapshots\\22.0\\VscFwk_1.7_Dev\\dev2_stg\\VscFwk";
> //private static String pomDir =
> "c:\\\\devhome\\workspaces\\Fabien_Workspace_Europa\\maven-dependency-plugin-2.1
> ";
>
>
> private static String settingsDir = "c:\\\\Documents and
> Settings\\fabien_coppens\\.m2";
>
> /**
> * @param args
> */
> public static void main(String[] args) {
>
> File user = new File(settingsDir, "settings.xml");
> File baseDirectory = new File(pomDir);
>
> System.out.println("settings file "+user.toString());
> System.out.println("project dir "+baseDirectory.toString());
>
> Configuration configuration = new DefaultConfiguration()
> .setUserSettingsFile(user)
> .setClassLoader(Thread.currentThread().getContextClassLoader
> ());
>
> ConfigurationValidationResult validationResult =
> MavenEmbedder.validateConfiguration(configuration);
>
> if (validationResult.isValid())
> {
> try {
> MavenEmbedder embedder = new MavenEmbedder
> (configuration);
>
> /*
> MavenExecutionRequest request = new
> DefaultMavenExecutionRequest()
> .setBaseDirectory(baseDirectory)
> .setGoals(Arrays.asList(new String[]{"clean",
> "install"}));
> */
>
> MavenExecutionRequest request = defineRequest
> (baseDirectory);
>
> MavenExecutionResult result = embedder.execute(request);
>
> if (null == result) {
> System.out.println("result is null !!");
> }
>
> if (result.hasExceptions())
> {
> System.out.println("Exceptions in Maven execute
> result :
> "+((Exception)result.getExceptions().get(0)).getMessage());
> }
>
> //
> ----------------------------------------------------------------------------
> // You may want to inspect the project after the
> execution.
> //
> ----------------------------------------------------------------------------
>
> MavenProject project = result.getProject();
>
>
> if (null == project) {
> System.out.println("project is null !!");
> }
>
> // Do something with the project
>
> String groupId = project.getGroupId();
>
> String artifactId = project.getArtifactId();
>
> String version = project.getVersion();
>
> String name = project.getName();
>
> List dependencies = project.getDependencies();
>
> if (null != dependencies) {
> System.out.println("Number of project dependencies :
> "+dependencies.size());
> for (Iterator i = dependencies.iterator(); i.hasNext
> ();) {
> Dependency dep = (Dependency) i.next();
> System.out.println("Dependency "+i+" :
> "+dep.getArtifactId());
> }
> }
>
> List runtimeDependencies =
> project.getRuntimeDependencies();
>
> if (null != runtimeDependencies) {
> System.out.println("Number of runtime dependencies :
> "+runtimeDependencies.size());
> for (Iterator i = runtimeDependencies.iterator();
> i.hasNext();) {
> Dependency dep = (Dependency) i.next();
> System.out.println("Runtime Dependency "+i+" :
> "+dep.getArtifactId());
> }
> }
>
> Set artifacts = project.getArtifacts();
>
> if (null != artifacts) {
> System.out.println("Number of artifacts :
> "+artifacts.size());
> for (Iterator i = artifacts.iterator(); i.hasNext();) {
> Artifact art = (Artifact) i.next();
> System.out.println("Artifact "+i+" : "+art.getId());
> }
> }
>
> }
>
> catch(MavenEmbedderException e) {
> System.out.println("MavenEmbedderException :
> "+e.getMessage());
> }
> }
> else
> {
> if (null != validationResult.getUserSettingsException()) {
> System.out.println("Error occurred in configuration
> validation :
> "+validationResult.getUserSettingsException().getMessage());
> }
> else if (null != validationResult.getGlobalSettingsException
> ()) {
> System.out.println("Error occurred in configuration
> validation :
> "+validationResult.getGlobalSettingsException().getMessage());
> }
> else {
> System.out.println("Error occurred in configuration
> validation");
> }
> }
>
>
>
> }
>
>
>
> private static MavenExecutionRequest defineRequest(File
> baseDirectory) {
>
> MavenExecutionRequest request = new DefaultMavenExecutionRequest()
> .setBaseDirectory(baseDirectory)
> .setGoals(Arrays.asList(new String[]{"clean", "install"}));
>
> return request;
> }
>
> }
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@maven.apache.org
> For additional commands, e-mail: users-help@maven.apache.org
>
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