/**
* Copyright (C) 2012 JBoss Inc
*
* 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.jboss.dashboard.annotation.config;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Type;
import java.util.HashMap;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.util.Properties;
import javax.annotation.PostConstruct;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.Produces;
import javax.enterprise.inject.spi.Annotated;
import javax.enterprise.inject.spi.InjectionPoint;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@ApplicationScoped
public class ConfigReader {
private static transient Logger log = LoggerFactory.getLogger(ConfigReader.class.getName());
private volatile Properties globalProperties;
private volatile Map<String, Properties> beanPropertyMap;
public static final String beansConfigFile ="META-INF/beans.config";
@PostConstruct
public void init() {
try {
globalProperties = new Properties();
beanPropertyMap = new HashMap<String, Properties>();
InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream(beansConfigFile);
if (is != null) globalProperties.load(is);
} catch (IOException ex) {
throw new RuntimeException(ex);
}
}
public @Produces @Config String readConfig(InjectionPoint p) {
// Read from specific bean
String beanKey = p.getMember().getDeclaringClass().getName();
Properties beanProperties = beanPropertyMap.get(beanKey);
if (beanProperties == null) {
beanPropertyMap.put(beanKey, beanProperties = new Properties());
try {
InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream("META-INF/" + beanKey + ".config");
if (is != null) beanProperties.load(is);
} catch (IOException ex) {
throw new RuntimeException(ex);
}
}
// Read from the bean config
String configKey = p.getMember().getName();
String configValue = beanProperties.getProperty(configKey);
if (configValue != null) return configValue;
// Read from global - by the fully qualified class name and field name
for (Type type : p.getBean().getTypes()) {
configKey = ((Class)type).getName() + "." + p.getMember().getName();
configValue = globalProperties.getProperty(configKey);
if (configValue != null) return configValue;
// Try class name from System.properties
configValue = System.getProperty(configKey);
if (configValue != null) {
log.info(String.format("System property: %s=%s", configKey, configValue));
return configValue;
}
// Try class simple name from System.properties
configKey = ((Class)type).getSimpleName() + "." + p.getMember().getName();
configValue = System.getProperty(configKey);
if (configValue != null) {
log.info(String.format("System property: %s=%s", configKey, configValue));
return configValue;
}
}
// Read from global - only by the field name
configKey = p.getMember().getName();
configValue = globalProperties.getProperty(configKey);
if (configValue != null) return configValue;
// Return the default value if any.
Annotated annotated = p.getAnnotated();
Config config = annotated.getAnnotation(Config.class);
if (config != null) return config.value();
return null;
}
public @Produces @Config byte readPrimitiveByte(InjectionPoint p) {
String val= readConfig(p);
return Byte.parseByte(val);
}
public @Produces @Config short readPrimitiveShort(InjectionPoint p) {
String val= readConfig(p);
return Short.parseShort(val);
}
public @Produces @Config int readPrimitiveInt(InjectionPoint p) {
String val= readConfig(p);
return Integer.parseInt(val);
}
public @Produces @Config long readPrimitiveLong(InjectionPoint p) {
String val= readConfig(p);
return Long.parseLong(val);
}
public @Produces @Config boolean readPrimitiveBoolean(InjectionPoint p) {
String val= readConfig(p);
return Boolean.parseBoolean(val);
}
public @Produces @Config float readPrimitiveFloat(InjectionPoint p) {
String val= readConfig(p);
return Float.parseFloat(val);
}
public @Produces @Config double readPrimitiveDouble(InjectionPoint p) {
String val= readConfig(p);
return Double.parseDouble(val);
}
public @Produces @Config String[] readStringArray(InjectionPoint p) {
String val = readConfig(p);
String[] result = StringUtils.split(val, ",");
for (int i = 0; i < result.length; i++) {
result[i] = result[i].trim();
}
return result;
}
public @Produces @Config List<String> readStringList(InjectionPoint p) {
String val = readConfig(p);
String[] array = StringUtils.split(val, ",");
List<String> list = new ArrayList<String>();
for (int i = 0; i < array.length; i++) {
list.add(array[i].trim());
}
return list;
}
public @Produces @Config Map<String,String> readStringMap(InjectionPoint p) {
String val = readConfig(p);
Map<String,String> results = new HashMap<String, String>();
String[] rows = StringUtils.split(val, ",");
for (int i = 0; i < rows.length; i++) {
String row = rows[i].trim();
final String[] rowSplit = row.split("=");
if (rowSplit.length != 2) throw new IllegalArgumentException("Illegal map entry '" + row + "'");
results.put(rowSplit[0].trim(), rowSplit[1].trim());
}
return results;
}
public @Produces @Config Properties readProperties(InjectionPoint p) {
String val = readConfig(p);
Properties results = new Properties();
String[] rows = StringUtils.split(val, ",");
for (int i = 0; i < rows.length; i++) {
String row = rows[i].trim();
final String[] rowSplit = row.split("=");
if (rowSplit.length != 2) throw new IllegalArgumentException("Illegal property entry '" + row + "'");
results.put(rowSplit[0].trim(), rowSplit[1].trim());
}
return results;
}
}