| /** |
| * 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.activemq.broker; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.MalformedURLException; |
| import java.net.URI; |
| import java.net.URL; |
| import java.util.Map; |
| import java.util.Properties; |
| |
| import org.apache.activemq.util.IntrospectionSupport; |
| |
| /** |
| * A {@link BrokerFactoryHandler} which uses a properties file to configure the |
| * broker's various policies. |
| * |
| * |
| */ |
| public class PropertiesBrokerFactory implements BrokerFactoryHandler { |
| |
| public BrokerService createBroker(URI brokerURI) throws Exception { |
| |
| Map properties = loadProperties(brokerURI); |
| BrokerService brokerService = createBrokerService(brokerURI, properties); |
| |
| IntrospectionSupport.setProperties(brokerService, properties); |
| return brokerService; |
| } |
| |
| /** |
| * Lets load the properties from some external URL or a relative file |
| */ |
| protected Map loadProperties(URI brokerURI) throws IOException { |
| // lets load a URI |
| String remaining = brokerURI.getSchemeSpecificPart(); |
| Properties properties = new Properties(); |
| File file = new File(remaining); |
| |
| InputStream inputStream = null; |
| if (file.exists()) { |
| inputStream = new FileInputStream(file); |
| } else { |
| URL url = null; |
| try { |
| url = new URL(remaining); |
| } catch (MalformedURLException e) { |
| // lets now see if we can find the name on the classpath |
| inputStream = findResourceOnClassPath(remaining); |
| if (inputStream == null) { |
| throw new IOException("File does not exist: " + remaining + ", could not be found on the classpath and is not a valid URL: " + e); |
| } |
| } |
| if (inputStream == null && url != null) { |
| inputStream = url.openStream(); |
| } |
| } |
| if (inputStream != null) { |
| properties.load(inputStream); |
| inputStream.close(); |
| } |
| |
| // should we append any system properties? |
| try { |
| Properties systemProperties = System.getProperties(); |
| properties.putAll(systemProperties); |
| } catch (Exception e) { |
| // ignore security exception |
| } |
| return properties; |
| } |
| |
| protected InputStream findResourceOnClassPath(String remaining) { |
| InputStream answer = Thread.currentThread().getContextClassLoader().getResourceAsStream(remaining); |
| if (answer == null) { |
| answer = getClass().getClassLoader().getResourceAsStream(remaining); |
| } |
| return answer; |
| } |
| |
| protected BrokerService createBrokerService(URI brokerURI, Map properties) { |
| return new BrokerService(); |
| } |
| } |