com.avanza.astrix.config.PropertiesConfigSource Maven / Gradle / Ivy
/*
* Copyright 2014 Avanza Bank AB
*
* 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 com.avanza.astrix.config;
import java.io.InputStream;
import java.util.Objects;
import java.util.Properties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* {@link ConfigSource} implementation delegating all property lookup to a {@link Properties} instance.
*
* @author Elias Lindholm (elilin)
*
*/
public class PropertiesConfigSource implements ConfigSource {
private static final Logger log = LoggerFactory.getLogger(PropertiesConfigSource.class);
private final Properties properties;
public PropertiesConfigSource(Properties properties) {
this.properties = Objects.requireNonNull(properties);
}
@Override
public String get(String propertyName) {
return properties.getProperty(propertyName);
}
public static ConfigSource optionalClasspathPropertiesFile(String fileName) {
Properties classpathOverride = new Properties();
try {
InputStream resourceAsStream = PropertiesConfigSource.class.getClassLoader().getResourceAsStream(fileName);
if (resourceAsStream == null) {
log.info("Optional config properties file not present on classpath: " + fileName + "");
return new PropertiesConfigSource(classpathOverride);
}
classpathOverride.load(resourceAsStream);
} catch (Exception e) {
log.warn("Failed to load config properties from file: " + fileName);
}
return new PropertiesConfigSource(classpathOverride);
}
public String toString() {
return "PropertiesConfigSource: " + this.properties.toString();
}
}