drivers/polatis/snmp/src/main/java/org/onosproject/drivers/polatis/snmp/PolatisDeviceDescription.java

/*
 * Copyright 2018-present Open Networking Foundation
 *
 * 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.drivers.polatis.snmp;

import com.google.common.collect.Lists;
import org.onosproject.net.Device;
import org.onosproject.net.DeviceId;
import org.onosproject.net.SparseAnnotations;
import org.onosproject.net.device.DefaultDeviceDescription;
import org.onosproject.net.device.DeviceDescription;
import org.onosproject.net.device.DeviceDescriptionDiscovery;
import org.onosproject.net.device.DeviceService;
import org.onosproject.net.device.PortDescription;
import org.onosproject.net.driver.AbstractHandlerBehaviour;

import org.onlab.packet.ChassisId;

import org.slf4j.Logger;

import java.io.IOException;
import java.util.List;

import static com.google.common.base.Preconditions.checkNotNull;
import static org.slf4j.LoggerFactory.getLogger;

import static org.onosproject.drivers.polatis.snmp.PolatisSnmpUtility.getOid;

/**
 * Representation of device information and ports via SNMP for all Polatis
 * optical circuit switches.
 */
public class PolatisDeviceDescription extends AbstractHandlerBehaviour
    implements DeviceDescriptionDiscovery {

    private static final String DEFAULT_MANUFACTURER = "Polatis";
    private static final String DEFAULT_DESCRIPTION_DATA = "Unknown";

    private static final String SOFTWARE_VERSION_OID = ".1.3.6.1.4.1.26592.2.1.2.2.3.0";
    private static final String PRODUCT_CODE_OID = ".1.3.6.1.4.1.26592.2.1.2.2.1.0";
    private static final String SERIAL_NUMBER_OID = ".1.3.6.1.4.1.26592.2.1.2.2.2.0";

    private final Logger log = getLogger(getClass());

    /**
     * Discovers device details, for Polatis Snmp device by getting the system
     * information.
     *
     * @return device description
     */
    @Override
    public DeviceDescription discoverDeviceDetails() {
        DeviceService deviceService = checkNotNull(handler().get(DeviceService.class));
        DeviceId deviceId = handler().data().deviceId();
        Device device = deviceService.getDevice(deviceId);
        if (device == null) {
            return new DefaultDeviceDescription(deviceId.uri(), Device.Type.FIBER_SWITCH,
                    DEFAULT_MANUFACTURER, DEFAULT_DESCRIPTION_DATA,
                    DEFAULT_DESCRIPTION_DATA, DEFAULT_DESCRIPTION_DATA,
                    new ChassisId());
        }
        String hardwareVersion = DEFAULT_DESCRIPTION_DATA;
        try {
            hardwareVersion = hardwareVersion();
        } catch (IOException e) {
            log.error("Error reading hardware version for device {} exception {}", deviceId, e);
        }

        String softwareVersion = DEFAULT_DESCRIPTION_DATA;
        try {
            softwareVersion = softwareVersion();
        } catch (IOException e) {
            log.error("Error reading software version for device {} exception {}", deviceId, e);
        }

        String serialNumber = DEFAULT_DESCRIPTION_DATA;
        try {
            serialNumber = serialNumber();
        } catch (IOException e) {
            log.error("Error reading serial number for device {} exception {}", deviceId, e);
        }

        return new DefaultDeviceDescription(deviceId.uri(), Device.Type.FIBER_SWITCH,
                                            DEFAULT_MANUFACTURER, hardwareVersion,
                                            softwareVersion, serialNumber,
                                            device.chassisId(), (SparseAnnotations) device.annotations());
    }

    /**
     * Discovers port details, for Polatis Snmp device.
     *
     * @return port list
     */
    @Override
    public List<PortDescription> discoverPortDetails() {
        // TODO: Implement me
        return Lists.newLinkedList();
        // return ImmutableList.copyOf(this.getPorts());
    }

    private String hardwareVersion() throws IOException {
        return getOid(handler(), PRODUCT_CODE_OID);
    }

    private String softwareVersion() throws IOException {
        return getOid(handler(), SOFTWARE_VERSION_OID);
    }

    private String serialNumber() throws IOException {
        return getOid(handler(), SERIAL_NUMBER_OID);
    }
}