core-it-support/core-it-plugins/maven-it-plugin-extension-consumer/src/main/java/org/apache/maven/plugin/coreit/UpdateSingletonMojo.java

/*
 * 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.
 */
package org.apache.maven.plugin.coreit;

import java.io.File;
import java.io.IOException;

import org.apache.maven.coreit.component.StatefulSingleton;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugins.annotations.Component;
import org.apache.maven.plugins.annotations.LifecyclePhase;
import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.Parameter;

/**
 * Updates the state of the singleton component and optionally dumps the updated state to a properties file.
 *
 *
 * @author Benjamin Bentmann
 */
@Mojo(name = "update-singleton", defaultPhase = LifecyclePhase.INITIALIZE)
public class UpdateSingletonMojo extends AbstractMojo {

    /**
     */
    @Parameter(defaultValue = "consumer")
    private String key;

    /**
     */
    @Parameter(defaultValue = "passed")
    private String value;

    /**
     */
    @Parameter
    private File propertiesFile;

    /**
     */
    @Component
    private StatefulSingleton singleton;

    /**
     * Runs this mojo.
     *
     * @throws MojoExecutionException If the output file could not be created.
     */
    public void execute() throws MojoExecutionException {
        getLog().info("[MAVEN-CORE-IT-LOG] Singleton Instance: " + System.identityHashCode(singleton));
        getLog().info("[MAVEN-CORE-IT-LOG] Singleton Class Loader: "
                + singleton.getClass().getClassLoader());

        getLog().info("[MAVEN-CORE-IT-LOG] Setting property " + key + " = " + value);

        singleton.setProperty(key, value);

        if (propertiesFile != null) {
            getLog().info("[MAVEN-CORE-IT-LOG] Saving properties to " + propertiesFile);

            try {
                singleton.saveProperties(propertiesFile);
            } catch (IOException e) {
                throw new MojoExecutionException("Failed to save properties to " + propertiesFile, e);
            }
        }
    }
}