XmlConfigParser.java
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/*
* 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.driver.netconf;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.HierarchicalConfiguration;
import org.apache.commons.configuration.XMLConfiguration;
import org.apache.commons.configuration.tree.ConfigurationNode;
import org.onlab.packet.IpAddress;
import org.onosproject.net.behaviour.ControllerInfo;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.InputStream;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;
/**
* Parser for Netconf XML configurations and replys.
*/
final class XmlConfigParser {
public static final Logger log = LoggerFactory
.getLogger(XmlConfigParser.class);
private XmlConfigParser() {
//not called, preventing any allocation
}
protected static HierarchicalConfiguration loadXml(InputStream xmlStream) {
XMLConfiguration cfg = new XMLConfiguration();
try {
cfg.load(xmlStream);
return cfg;
} catch (ConfigurationException e) {
throw new IllegalArgumentException("Cannot load xml from Stream", e);
}
}
protected static List<ControllerInfo> parseStreamControllers(HierarchicalConfiguration cfg) {
List<ControllerInfo> controllers = new ArrayList<>();
List<HierarchicalConfiguration> fields =
cfg.configurationsAt("data.capable-switch." +
"logical-switches." +
"switch.controllers.controller");
for (HierarchicalConfiguration sub : fields) {
controllers.add(new ControllerInfo(
IpAddress.valueOf(sub.getString("ip-address")),
Integer.parseInt(sub.getString("port")),
sub.getString("protocol")));
}
return controllers;
}
protected static String parseSwitchId(HierarchicalConfiguration cfg) {
HierarchicalConfiguration field =
cfg.configurationAt("data.capable-switch." +
"logical-switches." +
"switch");
return field.getProperty("id").toString();
}
protected static String parseCapableSwitchId(HierarchicalConfiguration cfg) {
HierarchicalConfiguration field =
cfg.configurationAt("data.capable-switch");
return field.getProperty("id").toString();
}
protected static String createControllersConfig(HierarchicalConfiguration cfg,
HierarchicalConfiguration actualCfg,
String target, String netconfOperation,
String controllerOperation,
List<ControllerInfo> controllers) {
//cfg.getKeys().forEachRemaining(key -> System.out.println(key));
cfg.setProperty("edit-config.target", target);
cfg.setProperty("edit-config.default-operation", netconfOperation);
cfg.setProperty("edit-config.config.capable-switch.id",
parseCapableSwitchId(actualCfg));
cfg.setProperty("edit-config.config.capable-switch." +
"logical-switches.switch.id", parseSwitchId(actualCfg));
List<ConfigurationNode> newControllers = new ArrayList<>();
for (ControllerInfo ci : controllers) {
XMLConfiguration controller = new XMLConfiguration();
controller.setRoot(new HierarchicalConfiguration.Node("controller"));
String id = ci.type() + ":" + ci.ip() + ":" + ci.port();
controller.setProperty("id", id);
controller.setProperty("ip-address", ci.ip());
controller.setProperty("port", ci.port());
controller.setProperty("protocol", ci.type());
newControllers.add(controller.getRootNode());
}
cfg.addNodes("edit-config.config.capable-switch.logical-switches." +
"switch.controllers", newControllers);
XMLConfiguration editcfg = (XMLConfiguration) cfg;
StringWriter stringWriter = new StringWriter();
try {
editcfg.save(stringWriter);
} catch (ConfigurationException e) {
log.error("createControllersConfig()", e);
}
String s = stringWriter.toString()
.replaceAll("<controller>",
"<controller nc:operation=\"" + controllerOperation + "\">");
s = s.replace("<target>" + target + "</target>",
"<target><" + target + "/></target>");
return s;
}
//TODO implement mor methods for parsing configuration when you need them
}