| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.tamaya.spisupport.propertysource; |
| |
| import org.apache.tamaya.ConfigException; |
| import org.apache.tamaya.spi.ChangeSupport; |
| import org.apache.tamaya.spi.PropertySource; |
| import org.apache.tamaya.spi.PropertyValue; |
| import org.apache.tamaya.spi.ServiceContextManager; |
| import org.apache.tamaya.spisupport.PropertySourceChangeSupport; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URL; |
| import java.util.*; |
| import java.util.concurrent.TimeUnit; |
| import java.util.function.BiConsumer; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| /** |
| * Simple {@link org.apache.tamaya.spi.PropertySource}, with a fixed ordinal that reads a .properties file from a given URL. |
| */ |
| public class PropertiesResourcePropertySource extends BasePropertySource { |
| /** The logger used. */ |
| private static final Logger LOGGER = Logger.getLogger(PropertiesResourcePropertySource.class.getName()); |
| |
| private final PropertySourceChangeSupport cachedProperties = new PropertySourceChangeSupport( |
| ChangeSupport.SUPPORTED, this); |
| |
| /** |
| * Creates a new instance. |
| * @param url the resource URL, not null. |
| */ |
| public PropertiesResourcePropertySource(URL url){ |
| this(url, null); |
| } |
| |
| /** |
| * Creates a new instance. |
| * @param prefix the (optional) prefix context for mapping (prefixing) the properties loaded. |
| * @param url the resource URL, not null. |
| */ |
| public PropertiesResourcePropertySource(URL url, String prefix){ |
| super(url.toExternalForm()); |
| this.cachedProperties.load(loadProps(url)); |
| this.cachedProperties.scheduleChangeMonitor(() -> loadProps(url), |
| 120, TimeUnit.SECONDS); |
| } |
| |
| /** |
| * Creates a new instance. |
| * @param path the resource path, not null. |
| */ |
| public PropertiesResourcePropertySource(String path){ |
| this(path, ServiceContextManager.getDefaultClassLoader()); |
| } |
| |
| /** |
| * Creates a new instance. |
| * @param path the resource path, not null. |
| * @param cl the class loader. |
| */ |
| public PropertiesResourcePropertySource(String path, ClassLoader cl){ |
| super(path); |
| this.cachedProperties.load(loadProps(path, cl)); |
| this.cachedProperties.scheduleChangeMonitor(() -> loadProps(path, cl), |
| 120, TimeUnit.SECONDS); |
| } |
| |
| /** |
| * Loads the properties using the JDK's Property loading mechanism. |
| * @param path the resource classpath, not null. |
| * @return the loaded properties. |
| */ |
| private Map<String, PropertyValue> loadProps(String path, ClassLoader cl) { |
| try { |
| URL url = ServiceContextManager.getServiceContext(cl).getResource(path); |
| return loadProps(url); |
| }catch(Exception e){ |
| throw new ConfigException("Failed to load properties from " + path, e); |
| } |
| } |
| |
| /** |
| * Loads the properties using the JDK's Property loading mechanism. |
| * @param url the resource URL, not null. |
| * @return the loaded properties. |
| */ |
| private Map<String, PropertyValue> loadProps(URL url) { |
| if(url!=null) { |
| try (InputStream is = url.openStream()) { |
| Properties props = new Properties(); |
| props.load(is); |
| return PropertyValue.mapProperties(MapPropertySource.getMap(props), getName()); |
| } catch (Exception e) { |
| LOGGER.log(Level.WARNING, "Failed to read properties from " + url, e); |
| } |
| }else{ |
| LOGGER.log(Level.WARNING, "No properties found at " + url); |
| } |
| return Collections.emptyMap(); |
| } |
| |
| @Override |
| public void addChangeListener(BiConsumer<Set<String>, PropertySource> l) { |
| this.cachedProperties.addChangeListener(l); |
| } |
| |
| @Override |
| public void removeChangeListener(BiConsumer<Set<String>, PropertySource> l) { |
| this.cachedProperties.removeChangeListener(l); |
| } |
| |
| @Override |
| public void removeAllChangeListeners() { |
| this.cachedProperties.removeAllChangeListeners(); |
| } |
| |
| @Override |
| public Map<String, PropertyValue> getProperties() { |
| return cachedProperties.getProperties(); |
| } |
| |
| @Override |
| public String getVersion() { |
| return cachedProperties.getVersion(); |
| } |
| |
| @Override |
| public ChangeSupport getChangeSupport() { |
| return ChangeSupport.SUPPORTED; |
| } |
| } |