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/*
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* Copyright (c) 2018 - 2024, Entgra (Pvt) Ltd. (http://www.entgra.io) All Rights Reserved.
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*
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* Entgra (Pvt) Ltd. 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 io.entgra.device.mgt.core.device.mgt.extensions.push.notification.provider.fcm.util;
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import com.google.auth.oauth2.GoogleCredentials;
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import io.entgra.device.mgt.core.device.mgt.core.config.DeviceConfigurationManager;
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import io.entgra.device.mgt.core.device.mgt.core.config.push.notification.ContextMetadata;
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import io.entgra.device.mgt.core.device.mgt.core.config.push.notification.PushNotificationConfiguration;
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import io.entgra.device.mgt.core.device.mgt.extensions.push.notification.provider.fcm.FCMNotificationStrategy;
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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.utils.CarbonUtils;
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import java.io.File;
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import java.io.IOException;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.util.List;
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import java.util.Properties;
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public class FCMUtil {
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private static final Log log = LogFactory.getLog(FCMUtil.class);
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private static volatile FCMUtil instance;
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private static GoogleCredentials defaultApplication;
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private static final String FCM_SERVICE_ACCOUNT_PATH = CarbonUtils.getCarbonHome() + File.separator +
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"repository" + File.separator + "resources" + File.separator + "service-account.json";
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private static final String[] FCM_SCOPES = { "https://www.googleapis.com/auth/firebase.messaging" };
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private Properties contextMetadataProperties;
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private FCMUtil() {
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initContextConfigs();
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initDefaultOAuthApplication();
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}
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private void initDefaultOAuthApplication() {
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if (defaultApplication == null) {
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Path serviceAccountPath = Paths.get(FCM_SERVICE_ACCOUNT_PATH);
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try {
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defaultApplication = GoogleCredentials.
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fromStream(Files.newInputStream(serviceAccountPath)).
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createScoped(FCM_SCOPES);
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} catch (IOException e) {
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String msg = "Fail to initialize default OAuth application for FCM communication";
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log.error(msg);
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throw new IllegalStateException(msg, e);
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}
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}
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}
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/**
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* Initialize the context metadata properties from the cdm-config.xml. This file includes the fcm server URL
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* to be invoked when sending the wakeup call to the device.
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*/
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private void initContextConfigs() {
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PushNotificationConfiguration pushNotificationConfiguration = DeviceConfigurationManager.getInstance().
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getDeviceManagementConfig().getPushNotificationConfiguration();
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List<ContextMetadata> contextMetadata = pushNotificationConfiguration.getContextMetadata();
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Properties properties = new Properties();
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if (contextMetadata != null) {
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for (ContextMetadata metadata : contextMetadata) {
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properties.setProperty(metadata.getKey(), metadata.getValue());
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}
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}
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contextMetadataProperties = properties;
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}
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/**
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* Get the instance of FCMUtil. FCMUtil is a singleton class which should not be
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* instantiating more than once. Instantiating the class requires to read the service account file from
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* the filesystem and instantiation of the GoogleCredentials object which are costly operations.
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* @return FCMUtil instance
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*/
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public static FCMUtil getInstance() {
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if (instance == null) {
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synchronized (FCMUtil.class) {
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if (instance == null) {
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instance = new FCMUtil();
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}
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}
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}
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return instance;
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}
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public GoogleCredentials getDefaultApplication() {
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return defaultApplication;
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}
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public Properties getContextMetadataProperties() {
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return contextMetadataProperties;
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}
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}
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@ -0,0 +1,47 @@
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/*
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* Copyright (c) 2018 - 2023, Entgra (Pvt) Ltd. (http://www.entgra.io) All Rights Reserved.
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*
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* Entgra (Pvt) Ltd. 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 io.entgra.device.mgt.core.device.mgt.core.config.push.notification;
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import javax.xml.bind.annotation.XmlAttribute;
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import javax.xml.bind.annotation.XmlElement;
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import javax.xml.bind.annotation.XmlRootElement;
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import javax.xml.bind.annotation.XmlValue;
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@XmlRootElement(name = "ContextMetadata")
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public class ContextMetadata {
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private String key;
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private String value;
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@XmlAttribute(name = "key")
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public String getKey() {
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return key;
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}
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public void setKey(String key) {
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this.key = key;
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}
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@XmlValue
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public String getValue() {
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return value;
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}
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public void setValue(String value) {
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this.value = value;
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}
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}
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