io.moquette.broker.config.ResourceLoaderConfig Maven / Gradle / Ivy
/*
* Copyright (c) 2012-2018 The original author or authors
* ------------------------------------------------------
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Apache License v2.0 which accompanies this distribution.
*
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* The Apache License v2.0 is available at
* http://www.opensource.org/licenses/apache2.0.php
*
* You may elect to redistribute this code under either of these licenses.
*/
package io.moquette.broker.config;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.Reader;
import java.text.ParseException;
import java.util.Properties;
/**
* Configuration that loads config stream from a {@link IResourceLoader} instance.
*/
public class ResourceLoaderConfig extends IConfig {
private static final Logger LOG = LoggerFactory.getLogger(ResourceLoaderConfig.class);
private final Properties m_properties;
private final IResourceLoader resourceLoader;
public ResourceLoaderConfig(IResourceLoader resourceLoader) {
this(resourceLoader, null);
}
public ResourceLoaderConfig(IResourceLoader resourceLoader, String configName) {
LOG.info("Loading configuration. ResourceLoader = {}, configName = {}.", resourceLoader.getName(), configName);
this.resourceLoader = resourceLoader;
/*
* If we use a conditional operator, the loadResource() and the loadDefaultResource()
* methods will be always called. This makes the log traces confusing.
*/
Reader configReader;
if (configName != null) {
configReader = resourceLoader.loadResource(configName);
} else {
configReader = resourceLoader.loadDefaultResource();
}
if (configReader == null) {
LOG.error(
"The resource loader returned no configuration reader. ResourceLoader = {}, configName = {}.",
resourceLoader.getName(),
configName);
throw new IllegalArgumentException("Can't locate " + resourceLoader.getName() + " \"" + configName + "\"");
}
LOG.info(
"Parsing configuration properties. ResourceLoader = {}, configName = {}.",
resourceLoader.getName(),
configName);
ConfigurationParser confParser = new ConfigurationParser();
m_properties = confParser.getProperties();
assignDefaults();
try {
confParser.parse(configReader);
} catch (ParseException pex) {
LOG.warn(
"Unable to parse configuration properties. Using default configuration. "
+ "ResourceLoader = {}, configName = {}, cause = {}, errorMessage = {}.",
resourceLoader.getName(),
configName,
pex.getCause(),
pex.getMessage());
}
}
@Override
public void setProperty(String name, String value) {
m_properties.setProperty(name, value);
}
@Override
public String getProperty(String name) {
return m_properties.getProperty(name);
}
@Override
public String getProperty(String name, String defaultValue) {
return m_properties.getProperty(name, defaultValue);
}
@Override
public IResourceLoader getResourceLoader() {
return resourceLoader;
}
}