core-it-suite/src/test/resources/mng-5742-build-extension-classloader/plugin/src/main/java/org/apache/maven/its/mng5742/build/extension/classloader/plugin/BuildExtensionClassloaderComponent.java

package org.apache.maven.its.mng5742.build.extension.classloader.plugin;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.concurrent.atomic.AtomicInteger;

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;

import org.apache.maven.AbstractMavenLifecycleParticipant;
import org.apache.maven.MavenExecutionException;
import org.apache.maven.execution.MavenSession;

@Named
@Singleton
public class BuildExtensionClassloaderComponent
    extends AbstractMavenLifecycleParticipant
{
    public static final String FILE_PATH = "target/execution-success.txt";

    @Inject
    public BuildExtensionClassloaderComponent()
    {
    }

    private final AtomicInteger pluginExecutionCount = new AtomicInteger();

    private final AtomicInteger extensionExecutionCount = new AtomicInteger();

    public void invokedFromMojo()
    {
        pluginExecutionCount.incrementAndGet();
    }

    @Override
    public void afterSessionEnd( MavenSession session )
        throws MavenExecutionException
    {
        if ( extensionExecutionCount.incrementAndGet() != 1 )
        {
            throw new IllegalStateException();
        }

        if ( pluginExecutionCount.intValue() != 1 )
        {
            throw new IllegalStateException();
        }

        try
        {
            File file = new File( session.getTopLevelProject().getBasedir(), FILE_PATH );
            file.getParentFile().mkdirs();
            Writer w = new OutputStreamWriter( new FileOutputStream( file, true ), "UTF-8" );
            try
            {
                w.write( "executed" );
            }
            finally
            {
                w.close();
            }
        }
        catch ( IOException e )
        {
            throw new MavenExecutionException( e.getMessage(), e );
        }
    }
}