io.fabric8.maven.docker.config.handler.ImageConfigResolver Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of docker-maven-plugin Show documentation
Docker Maven Plugin
The newest version!
package io.fabric8.maven.docker.config.handler;/*
 * 
 * Copyright 2014 Roland Huss
 *
 * Licensed 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.util.*;

import io.fabric8.maven.docker.config.ImageConfiguration;
import org.codehaus.plexus.component.annotations.Component;
import org.codehaus.plexus.component.annotations.Requirement;
import org.codehaus.plexus.personality.plexus.lifecycle.phase.Initializable;
import org.codehaus.plexus.personality.plexus.lifecycle.phase.InitializationException;

/**
 * Manager holding all config handlers for external configuration
 *
 * @author roland
 * @since 18/11/14
 */

@Component(role = ImageConfigResolver.class, instantiationStrategy = "per-lookup")
public class ImageConfigResolver implements Initializable {

    // Map type to handler
    private Map registry;

    @Requirement(role = ExternalConfigHandler.class)
    private List handlers;

    @Override
    public void initialize() throws InitializationException {
        this.registry = new HashMap<>();
        if (handlers != null) {
            for (ExternalConfigHandler handler : handlers) {
                registry.put(handler.getType(), handler);
            }
        }
    }

    /**
     * Resolve an image configuration. If it contains a reference to an external configuration
     * the corresponding resolver is called and the resolved image configurations are returned (can
     * be multiple). If no reference to an external configuration is found, the original configuration
     * is returned directly.
     *
     * @param unresolvedConfig the configuration to resolve
     * @param properties extra properties used for resolving
     * @return list of resolved image configurations
     * @throws IllegalArgumentException if no type is given when an external reference configuration is provided
     * or when the type is not known (i.e. no handler is registered for this type).
     */
    public List resolve(ImageConfiguration unresolvedConfig, Properties properties) {
        Map referenceConfig = unresolvedConfig.getExternalConfig();
        if (referenceConfig != null) {
            String type = referenceConfig.get("type");
            if (type == null) {
                throw new IllegalArgumentException(unresolvedConfig.getDescription() + ": No config type given");
            }
            ExternalConfigHandler handler = registry.get(type);
            if (handler == null) {
                throw new IllegalArgumentException(unresolvedConfig.getDescription() + ": No handler for type " + type + " given");
            }
            return handler.resolve(unresolvedConfig,properties);
        } else {
            return Collections.singletonList(unresolvedConfig);
        }
    }

}