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This bundle is the core implementation of the Karaf features support.
/*
* 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.karaf.features.internal.region;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.karaf.features.Feature;
import org.apache.karaf.features.FeaturesService;
import org.eclipse.equinox.region.Region;
import org.osgi.framework.wiring.BundleRevision;
import org.osgi.resource.Resource;
import org.osgi.resource.Wire;
import org.osgi.service.repository.Repository;
/**
* Public API of {@link SubsystemResolver} - for the purpose of documentation and categorization to public and internal
* methods. This interface groups methods related to resolution of {@link Subsystem subsystems}.
*/
public interface SubsystemResolverResolution {
/**
* Prepares the resolver by configuring {@link Subsystem} hierarchy.
* The input is a mapping from {@link Region region names} to a set of logical requirements.
* The effect is:
* - A tree of {@link Subsystem subsystems} where the root subsystem represents {@link FeaturesService#ROOT_REGION}
* with regions like
root/app1
represented as child subsystems.
* - A subsystem is created for each feature requirement and added as child and requirement for given region's subsystem
* - Each subsystem for a feature has optional requirements for conditional features
*
*
* @param allFeatures all currently available features partitioned by name.
* @param requirements desired mapping from regions to logical requirements.
* @param system mapping from regions to unmanaged {@link BundleRevision}s.
*/
void prepare(Map> allFeatures,
Map> requirements,
Map> system) throws Exception;
/**
* Before attempting {@link #resolve resolution}, we can collect features' prerequisites. If there are any,
* caller may decide to deploy another set of requirements before the initial ones.
* Prerequisites allow to install for example wrap
feature before installing a feature with bundle
* using wrap:
protocol.
*
* @return The collected prerequisites.
*/
Set collectPrerequisites();
public Map> resolve(String featureResolutionRange,
FeaturesService.ServiceRequirementsBehavior serviceRequirements,
final Repository globalRepository,
String outputFile) throws Exception;
}