/*
* 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.service;
import java.net.URI;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.EnumSet;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.List;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.karaf.features.BootFinished;
import org.apache.karaf.features.FeaturesService;
import org.osgi.framework.BundleContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class BootFeaturesInstaller {
private static final Logger LOGGER = LoggerFactory.getLogger(BootFeaturesInstaller.class);
private final FeaturesServiceImpl featuresService;
private final BundleContext bundleContext;
private final String repositories;
private final String features;
private final boolean asynchronous;
/**
* @param features list of boot features separated by comma. Optionally contains ;version=x.x.x to specify a specific feature version
*/
public BootFeaturesInstaller(BundleContext bundleContext,
FeaturesServiceImpl featuresService,
String repositories,
String features,
boolean asynchronous) {
this.bundleContext = bundleContext;
this.featuresService = featuresService;
this.repositories = repositories;
this.features = features;
this.asynchronous = asynchronous;
}
/**
* Install boot features
*/
public void start() {
if (featuresService.isBootDone()) {
publishBootFinished();
return;
}
if (asynchronous) {
new Thread("Initial Features Provisioning") {
public void run() {
installBootFeatures();
}
}.start();
} else {
installBootFeatures();
}
}
protected void installBootFeatures() {
try {
for (String repo : repositories.split(",")) {
repo = repo.trim();
if (!repo.isEmpty()) {
try {
featuresService.addRepository(URI.create(repo));
} catch (Exception e) {
LOGGER.error("Error installing boot feature repository " + repo, e);
}
}
}
List<Set<String>> stagedFeatures = parseBootFeatures(features);
for (Set<String> features : stagedFeatures) {
featuresService.installFeatures(features, EnumSet.of(FeaturesService.Option.NoFailOnFeatureNotFound));
}
featuresService.bootDone();
publishBootFinished();
} catch (Exception e) {
// Special handling in case the bundle has been refreshed.
// In such a case, simply exits without logging any exception
// as the restart should cause the feature service to finish
// the work.
if (e instanceof IllegalStateException) {
try {
bundleContext.getBundle();
} catch (IllegalStateException ies) {
return;
}
}
LOGGER.error("Error installing boot features", e);
}
}
protected List<Set<String>> parseBootFeatures(String bootFeatures) {
Pattern pattern = Pattern.compile("(\\s*\\(([^)]+))\\s*\\)\\s*,\\s*|.+");
Matcher matcher = pattern.matcher(bootFeatures);
List<Set<String>> result = new ArrayList<>();
while (matcher.find()) {
String group = matcher.group(2) != null ? matcher.group(2) : matcher.group();
result.add(parseFeatureList(group));
}
return result;
}
protected Set<String> parseFeatureList(String group) {
HashSet<String> features = new HashSet<>();
for (String feature : Arrays.asList(group.trim().split("\\s*,\\s*"))) {
if (feature.length() > 0) {
features.add(feature);
}
}
return features;
}
private void publishBootFinished() {
if (bundleContext != null) {
BootFinished bootFinished = new BootFinished() {
};
bundleContext.registerService(BootFinished.class, bootFinished, new Hashtable<String, String>());
}
}
}