org.opennaas.extensions.router.junos.actionssets.actions.topologydiscovery.GetLocalInformationAction.java Source code

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Here is the source code for org.opennaas.extensions.router.junos.actionssets.actions.topologydiscovery.GetLocalInformationAction.java

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package org.opennaas.extensions.router.junos.actionssets.actions.topologydiscovery;

/*
 * #%L
 * OpenNaaS :: Router :: Junos ActionSet
 * %%
 * Copyright (C) 2007 - 2014 Fundaci Privada i2CAT, Internet i Innovaci a Catalunya
 * %%
 * 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.
 * #L%
 */

import java.io.ByteArrayInputStream;
import java.util.HashMap;
import java.util.Map;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;

import net.i2cat.netconf.rpc.Reply;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.opennaas.core.resources.action.ActionException;
import org.opennaas.core.resources.action.ActionResponse;
import org.opennaas.core.resources.command.CommandException;
import org.opennaas.core.resources.command.Response;
import org.opennaas.core.resources.protocol.IProtocolSession;
import org.opennaas.extensions.router.capability.topologydiscovery.model.LocalInformation;
import org.opennaas.extensions.router.junos.actionssets.ActionConstants;
import org.opennaas.extensions.router.junos.actionssets.actions.JunosAction;
import org.opennaas.extensions.router.junos.commandsets.commands.GenericJunosCommand;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

/**
 * 
 * @author Adrin Rosell Rey (i2CAT)
 *
 */
public class GetLocalInformationAction extends JunosAction {

    private static final String PROTOCOL_NAME = "netconf";

    private static final String LOCAL_ID_PATH = "//lldp-local-info/lldp-local-chassis-id";
    private static final String LOCAL_IFACE_INFO_PATH = "//lldp-local-info/lldp-local-interface-info";

    private static final String LOCAL_IFACE_NAME_TAG = "lldp-local-interface-name";
    private static final String LOCAL_IFACE_ID_TAG = "lldp-local-interface-id";

    private static final String REQUEST_XML = "<get-lldp-local-info />";

    private Log log = LogFactory.getLog(GetLocalInformationAction.class);
    private LocalInformation rpcResponse;

    public GetLocalInformationAction() {
        setActionID(ActionConstants.TOPOLOGY_DISCOVERY_GET_LOCAL_INFORMATION);
        this.protocolName = PROTOCOL_NAME;
    }

    /**
     * Send the command to the protocol session
     * 
     * @param actionResponse
     * @param protocol
     * @throws ActionException
     */
    @Override
    public void executeListCommand(ActionResponse actionResponse, IProtocolSession protocol)
            throws ActionException {

        try {

            GenericJunosCommand command = new GenericJunosCommand("get-lldp-local-info", REQUEST_XML);
            command.initialize();
            Response response = sendCommandToProtocol(command, protocol);
            actionResponse.addResponse(response);
            actionResponse.setResult(rpcResponse);
        } catch (Exception e) {
            throw new ActionException(this.actionID, e);
        }
        validateAction(actionResponse);
    }

    @Override
    public void parseResponse(Object responseMessage, Object model) throws ActionException {

        log.info("Parsing netconf response");

        if (!(responseMessage instanceof Reply))
            throw new CommandException("Error parsing response: the response is not a Reply message");

        Reply rpcReply = (Reply) responseMessage;
        String message = rpcReply.getContain();

        if (message != null) {
            try {
                DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
                DocumentBuilder builder = builderFactory.newDocumentBuilder();

                XPath xPath = XPathFactory.newInstance().newXPath();
                Document xmlDocument = builder.parse(new ByteArrayInputStream(message.getBytes()));

                String deviceId = (String) xPath.compile(LOCAL_ID_PATH).evaluate(xmlDocument,
                        XPathConstants.STRING);
                NodeList interfaces = (NodeList) xPath.compile(LOCAL_IFACE_INFO_PATH).evaluate(xmlDocument,
                        XPathConstants.NODESET);

                Map<String, String> ifacesMap = new HashMap<String, String>();

                for (int i = 0; i < interfaces.getLength(); i++) {

                    Element element = (Element) interfaces.item(i);
                    String ifaceName = element.getElementsByTagName(LOCAL_IFACE_NAME_TAG).item(0).getTextContent();
                    String portId = element.getElementsByTagName(LOCAL_IFACE_ID_TAG).item(0).getTextContent();

                    ifacesMap.put(portId, ifaceName);

                }

                rpcResponse = new LocalInformation();
                rpcResponse.setDeviceId(deviceId);
                rpcResponse.setInterfacesMap(ifacesMap);

            } catch (Exception e) {
                log.error("Error parsing netconf message: ", e);
                throw new ActionException(e);
            }

        }

    }

    @Override
    public boolean checkParams(Object params) throws ActionException {
        log.debug("Ignoring params in " + this.actionID + " action");

        return true;
    }

    @Override
    public void prepareMessage() throws ActionException {

    }

}