| /* |
| * Copyright 2015 Open Networking Laboratory |
| * |
| * 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. |
| */ |
| package org.onosproject.net.config.impl; |
| |
| import com.fasterxml.jackson.databind.JsonNode; |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.fasterxml.jackson.databind.node.ObjectNode; |
| import com.google.common.collect.Maps; |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.onosproject.net.config.Config; |
| import org.onosproject.net.config.NetworkConfigEvent; |
| import org.onosproject.net.config.NetworkConfigListener; |
| import org.onosproject.net.config.NetworkConfigService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.File; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Objects; |
| |
| /** |
| * Component for loading the initial network configuration. |
| */ |
| @Component(immediate = true) |
| public class NetworkConfigLoader { |
| |
| private static final File CFG_FILE = new File("../config/network-cfg.json"); |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected NetworkConfigService networkConfigService; |
| |
| // FIXME: Add mutual exclusion to make sure this happens only once per startup. |
| |
| private final Map<InnerConfigPosition, JsonNode> jsons = Maps.newConcurrentMap(); |
| |
| private final NetworkConfigListener configListener = new InnerConfigListener(); |
| |
| private ObjectNode root; |
| |
| @Activate |
| public void activate() { |
| //TODO Maybe this should be at the bottom to avoid a potential race |
| networkConfigService.addListener(configListener); |
| try { |
| if (CFG_FILE.exists()) { |
| root = (ObjectNode) new ObjectMapper().readTree(CFG_FILE); |
| |
| populateConfigurations(); |
| |
| applyConfigurations(); |
| |
| log.info("Loaded initial network configuration from {}", CFG_FILE); |
| } |
| } catch (Exception e) { |
| log.warn("Unable to load initial network configuration from {}", |
| CFG_FILE, e); |
| } |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| networkConfigService.removeListener(configListener); |
| } |
| // sweep through pending config jsons and try to add them |
| |
| /** |
| * Inner class that allows for handling of newly added NetConfig types. |
| */ |
| private final class InnerConfigListener implements NetworkConfigListener { |
| |
| @Override |
| public void event(NetworkConfigEvent event) { |
| //TODO should this be done for other types of NetworkConfigEvents? |
| if (event.type() == NetworkConfigEvent.Type.CONFIG_REGISTERED || |
| event.type() == NetworkConfigEvent.Type.CONFIG_ADDED) { |
| applyConfigurations(); |
| } |
| |
| } |
| } |
| |
| /** |
| * Inner class that allows for tracking of JSON class configurations. |
| */ |
| private final class InnerConfigPosition { |
| private final String subjectKey, subject, configKey; |
| |
| private String subjectKey() { |
| return subjectKey; |
| } |
| |
| private String subject() { |
| return subject; |
| } |
| |
| private String configKey() { |
| return configKey; |
| } |
| |
| private InnerConfigPosition(String subjectKey, String subject, String configKey) { |
| this.subjectKey = subjectKey; |
| this.subject = subject; |
| this.configKey = configKey; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof InnerConfigPosition) { |
| final InnerConfigPosition that = (InnerConfigPosition) obj; |
| return Objects.equals(this.subjectKey, that.subjectKey) |
| && Objects.equals(this.subject, that.subject) |
| && Objects.equals(this.configKey, that.configKey); |
| } |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(subjectKey, subject, configKey); |
| } |
| } |
| |
| /** |
| * Save the JSON leaves associated with a specific subject key. |
| * |
| * @param sk the subject key string. |
| * @param node the node associated with the subject key. |
| */ |
| private void saveJson(String sk, ObjectNode node) { |
| node.fieldNames().forEachRemaining(s -> |
| saveSubjectJson(sk, s, (ObjectNode) node.path(s))); |
| } |
| |
| /** |
| * Save the JSON leaves of the tree rooted as the node 'node' with subject key 'sk'. |
| * |
| * @param sk the string of the subject key. |
| * @param s the subject name. |
| * @param node the node rooting this subtree. |
| */ |
| private void saveSubjectJson(String sk, |
| String s, ObjectNode node) { |
| node.fieldNames().forEachRemaining(c -> |
| this.jsons.put(new InnerConfigPosition(sk, s, c), node.path(c))); |
| } |
| |
| /** |
| * Iterate through the JSON and populate a list of the leaf nodes of the structure. |
| */ |
| private void populateConfigurations() { |
| root.fieldNames().forEachRemaining(sk -> |
| saveJson(sk, (ObjectNode) root.path(sk))); |
| |
| } |
| |
| /** |
| * Apply the configurations associated with all of the config classes that |
| * are imported and have not yet been applied. |
| */ |
| private void applyConfigurations() { |
| Iterator<Map.Entry<InnerConfigPosition, JsonNode>> iter = jsons.entrySet().iterator(); |
| |
| Map.Entry<InnerConfigPosition, JsonNode> entry; |
| InnerConfigPosition key; |
| JsonNode node; |
| String subjectKey; |
| String subjectString; |
| String configKey; |
| |
| while (iter.hasNext()) { |
| entry = iter.next(); |
| node = entry.getValue(); |
| key = entry.getKey(); |
| subjectKey = key.subjectKey(); |
| subjectString = key.subject(); |
| configKey = key.configKey(); |
| |
| Class<? extends Config> configClass = |
| networkConfigService.getConfigClass(subjectKey, configKey); |
| //Check that the config class has been imported |
| if (configClass != null) { |
| |
| Object subject = networkConfigService.getSubjectFactory(subjectKey). |
| createSubject(subjectString); |
| |
| //Apply the configuration |
| networkConfigService.applyConfig(subject, configClass, node); |
| |
| //Now that it has been applied the corresponding JSON entry is no longer needed |
| iter.remove(); |
| } |
| } |
| } |
| |
| } |