Rasika Perera
9 years ago
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/*
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* Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
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*
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* WSO2 Inc. licenses this file to you under the Apache License,
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* Version 2.0 (the "License"); you may not use this file except
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* in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.wso2.carbon.device.mgt.iot.sample.firealarm.plugin.impl;
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import com.google.gson.Gson;
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import com.google.gson.JsonArray;
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import com.google.gson.JsonElement;
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import com.google.gson.JsonParser;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.wso2.carbon.context.CarbonContext;
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import org.wso2.carbon.device.mgt.common.Device;
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import org.wso2.carbon.device.mgt.common.DeviceIdentifier;
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import org.wso2.carbon.device.mgt.iot.common.exception.DeviceControllerException;
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import org.wso2.carbon.device.mgt.iot.sample.firealarm.plugin.constants.FireAlarmConstants;
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import org.wso2.carbon.policy.mgt.common.Policy;
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import org.wso2.carbon.policy.mgt.common.monitor.ComplianceData;
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import org.wso2.carbon.policy.mgt.common.monitor.ComplianceFeature;
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import org.wso2.carbon.policy.mgt.common.monitor.PolicyComplianceException;
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import org.wso2.carbon.policy.mgt.common.spi.PolicyMonitoringService;
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import org.wso2.carbon.device.mgt.iot.common.transport.mqtt.MqttPublisher;
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import java.util.ArrayList;
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import java.util.List;
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import static java.nio.charset.StandardCharsets.UTF_8;
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public class FireAlarmPolicyMonitoringService implements PolicyMonitoringService {
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private static Log log = LogFactory.getLog(FireAlarmPolicyMonitoringService.class);
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@Override
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public void notifyDevices(List<Device> list) throws PolicyComplianceException {
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String userName = CarbonContext.getThreadLocalCarbonContext().getUsername();
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MqttPublisher mqttPublisher = new MqttPublisher();
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try {
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mqttPublisher.initControlQueue();
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mqttPublisher.publish("Raspberry-Policy-sender",
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"/iot/policymgt/govern/" + FireAlarmConstants.DEVICE_TYPE + "/"
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+ userName, userName.getBytes(UTF_8));
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} catch (DeviceControllerException e) {
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log.error("Error on notifying "+FireAlarmConstants.DEVICE_TYPE+" devices, message not sent.");
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}
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}
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@Override
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public ComplianceData checkPolicyCompliance(DeviceIdentifier deviceIdentifier, Policy policy,
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Object compliancePayload) throws PolicyComplianceException {
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if (log.isDebugEnabled()) {
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log.debug("Checking policy compliance status of device '" + deviceIdentifier.getId() + "'");
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}
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ComplianceData complianceData = new ComplianceData();
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if (compliancePayload == null || policy == null) {
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return complianceData;
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}
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List<ComplianceFeature> complianceFeatures = new ArrayList<ComplianceFeature>();
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// Parsing json string to get compliance features.
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JsonElement jsonElement;
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if (compliancePayload instanceof String) {
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jsonElement = new JsonParser().parse((String) compliancePayload);
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} else {
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throw new PolicyComplianceException("Invalid policy compliance payload");
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}
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JsonArray jsonArray = jsonElement.getAsJsonArray();
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Gson gson = new Gson();
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ComplianceFeature complianceFeature;
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for (JsonElement element : jsonArray) {
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complianceFeature = gson.fromJson(element, ComplianceFeature.class);
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complianceFeatures.add(complianceFeature);
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}
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complianceData.setComplianceFeatures(complianceFeatures);
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for (ComplianceFeature cf : complianceFeatures) {
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if (!cf.isCompliant()) {
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complianceData.setStatus(false);
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break;
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}
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}
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return complianceData;
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}
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@Override
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public String getType() {
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return FireAlarmConstants.DEVICE_TYPE;
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}
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}
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