/*
* 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);
}
}
}