/* * Copyright 2015 Red Hat, Inc. and/or its affiliates * and other contributors as indicated by the @author tags. * * 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.hawkular.alerts.engine.impl; import java.io.File; import java.io.FileInputStream; import java.io.InputStream; import java.util.Properties; import org.hawkular.alerts.engine.log.MsgLogger; /** * Read global properties from hawkular-alerts.properties registration * * @author Lucas Ponce */ public class AlertProperties { private static final MsgLogger msgLog = MsgLogger.LOGGER; private static final String ALERTS_CONF = "hawkular-alerts.properties"; private static Properties alertsProperties = null; private AlertProperties() { } public static String getProperty(String key, String defaultValue) { return getProperty(key, null, defaultValue); } public static String getProperty(String key, String envKey, String defaultValue) { if (alertsProperties == null) { initConfiguration(); } String value = System.getProperty(key); if (value == null) { if (envKey != null) { value = System.getenv(envKey); } if (value == null) { value = alertsProperties.getProperty(key, defaultValue); } } return value; } private static void initConfiguration() { try { String userHome = System.getProperty("user.home"); InputStream is = null; if (userHome != null) { File extFile = new File(userHome, "." + ALERTS_CONF); if (extFile.exists()) { is = new FileInputStream(extFile); } } if (is == null) { is = AlertProperties.class.getClassLoader().getResourceAsStream(ALERTS_CONF); } alertsProperties = new Properties(); alertsProperties.load(is); } catch (Exception e) { msgLog.warningFileNotFound(ALERTS_CONF); } } }