| /* |
| * 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.io.DataInputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.karaf.features.internal.service.FeaturesServiceImpl; |
| import org.apache.karaf.features.internal.util.JsonReader; |
| import org.apache.karaf.features.internal.util.JsonWriter; |
| import org.eclipse.equinox.internal.region.StandardRegionDigraph; |
| import org.eclipse.equinox.region.Region; |
| import org.eclipse.equinox.region.RegionDigraph; |
| import org.eclipse.equinox.region.RegionFilterBuilder; |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.BundleException; |
| import org.osgi.framework.InvalidSyntaxException; |
| |
| public final class DigraphHelper { |
| |
| private static final String DIGRAPH_FILE = "digraph.json"; |
| |
| private static final String REGIONS = "regions"; |
| private static final String EDGES = "edges"; |
| private static final String TAIL = "tail"; |
| private static final String HEAD = "head"; |
| private static final String POLICY = "policy"; |
| |
| private DigraphHelper() { |
| } |
| |
| public static StandardRegionDigraph loadDigraph(BundleContext bundleContext) throws BundleException, IOException, InvalidSyntaxException { |
| StandardRegionDigraph digraph; |
| ThreadLocal<Region> threadLocal = new ThreadLocal<>(); |
| File digraphFile = bundleContext.getDataFile(DIGRAPH_FILE); |
| if (digraphFile == null || !digraphFile.exists()) { |
| digraph = new StandardRegionDigraph(bundleContext, threadLocal); |
| } else { |
| try ( |
| InputStream in = new FileInputStream(digraphFile) |
| ) { |
| digraph = readDigraph(new DataInputStream(in), bundleContext, threadLocal); |
| } |
| } |
| // Create default region is missing |
| Region defaultRegion = digraph.getRegion(FeaturesServiceImpl.ROOT_REGION); |
| if (defaultRegion == null) { |
| defaultRegion = digraph.createRegion(FeaturesServiceImpl.ROOT_REGION); |
| } |
| // Add all unknown bundle to default region |
| Set<Long> ids = new HashSet<>(); |
| for (Bundle bundle : bundleContext.getBundles()) { |
| long id = bundle.getBundleId(); |
| ids.add(id); |
| if (digraph.getRegion(id) == null) { |
| defaultRegion.addBundle(id); |
| } |
| } |
| // Clean stalled bundles |
| for (Region region : digraph) { |
| Set<Long> bundleIds = new HashSet<>(region.getBundleIds()); |
| bundleIds.removeAll(ids); |
| for (long id : bundleIds) { |
| region.removeBundle(id); |
| } |
| } |
| return digraph; |
| } |
| |
| public static void saveDigraph(BundleContext bundleContext, RegionDigraph digraph) throws IOException { |
| File digraphFile = bundleContext.getDataFile(DIGRAPH_FILE); |
| try ( |
| FileOutputStream out = new FileOutputStream(digraphFile) |
| ) { |
| saveDigraph(digraph, out); |
| } catch (Exception e) { |
| // Ignore |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| static StandardRegionDigraph readDigraph(InputStream in, BundleContext bundleContext, ThreadLocal<Region> threadLocal) throws IOException, BundleException, InvalidSyntaxException { |
| StandardRegionDigraph digraph = new StandardRegionDigraph(bundleContext, threadLocal); |
| Map json = (Map) JsonReader.read(in); |
| Map<String, Collection<Number>> regions = (Map<String, Collection<Number>>) json.get(REGIONS); |
| for (Map.Entry<String, Collection<Number>> rmap : regions.entrySet()) { |
| String name = rmap.getKey(); |
| Region region = digraph.createRegion(name); |
| for (Number b : rmap.getValue()) { |
| region.addBundle(b.longValue()); |
| } |
| } |
| List<Map<String, Object>> edges = (List<Map<String, Object>>) json.get(EDGES); |
| for (Map<String, Object> e : edges) { |
| String tail = (String) e.get(TAIL); |
| String head = (String) e.get(HEAD); |
| Map<String, Collection<String>> policy = (Map<String, Collection<String>>) e.get(POLICY); |
| RegionFilterBuilder builder = digraph.createRegionFilterBuilder(); |
| for (Map.Entry<String, Collection<String>> rf : policy.entrySet()) { |
| String ns = rf.getKey(); |
| for (String f : rf.getValue()) { |
| builder.allow(ns, f); |
| } |
| } |
| digraph.connect(digraph.getRegion(tail), builder.build(), digraph.getRegion(head)); |
| } |
| return digraph; |
| } |
| |
| static void saveDigraph(RegionDigraph digraph, OutputStream out) throws IOException { |
| Map<String, Object> json = new LinkedHashMap<>(); |
| Map<String, Set<Long>> regions = new LinkedHashMap<>(); |
| json.put(REGIONS, regions); |
| for (Region region : digraph.getRegions()) { |
| regions.put(region.getName(), region.getBundleIds()); |
| } |
| List<Map<String, Object>> edges = new ArrayList<>(); |
| json.put(EDGES, edges); |
| for (Region tail : digraph.getRegions()) { |
| for (RegionDigraph.FilteredRegion fr : digraph.getEdges(tail)) { |
| Map<String, Object> edge = new HashMap<>(); |
| edge.put(TAIL, tail.getName()); |
| edge.put(HEAD, fr.getRegion().getName()); |
| edge.put(POLICY, fr.getFilter().getSharingPolicy()); |
| edges.add(edge); |
| |
| } |
| } |
| JsonWriter.write(out, json); |
| } |
| |
| } |