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/*
* Copyright 2007 Netflix, 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 net.oauth;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
/**
* A pool of OAuthConsumers that are constructed from Properties. Each consumer
* has a name, which is a property of the OAuthConsumer. Other properties come
* from Properties whose names are prefixed with the consumer's name. For
* example, a consumer's credentials come from properties named
* [name].consumerKey and [name].consumerSecret.
*
* @author John Kristian
*/
public class ConsumerProperties {
public static URL getResource(String name, ClassLoader loader)
throws IOException {
URL resource = loader.getResource(name);
if (resource == null) {
throw new IOException("resource not found: " + name);
}
return resource;
}
public static Properties getProperties(URL source) throws IOException {
InputStream input = source.openStream();
try {
Properties p = new Properties();
p.load(input);
return p;
} finally {
input.close();
}
}
public ConsumerProperties(String resourceName, ClassLoader loader)
throws IOException {
this(getProperties(getResource(resourceName, loader)));
}
public ConsumerProperties(Properties consumerProperties) {
this.consumerProperties = consumerProperties;
}
private final Properties consumerProperties;
private final Map pool = new HashMap();
/** Get the consumer with the given name. */
public OAuthConsumer getConsumer(String name) throws MalformedURLException {
OAuthConsumer consumer;
synchronized (pool) {
consumer = pool.get(name);
}
if (consumer == null) {
consumer = newConsumer(name);
}
synchronized (pool) {
OAuthConsumer first = pool.get(name);
if (first == null) {
pool.put(name, consumer);
} else {
/*
* Another thread just constructed an identical OAuthConsumer.
* Use that one (and discard the one we just constructed).
*/
consumer = first;
}
}
return consumer;
}
@SuppressWarnings("rawtypes")
protected OAuthConsumer newConsumer(String name)
throws MalformedURLException {
String base = consumerProperties.getProperty(name
+ ".serviceProvider.baseURL");
URL baseURL = (base == null) ? null : new URL(base);
OAuthServiceProvider serviceProvider = new OAuthServiceProvider(getURL(
baseURL, name + ".serviceProvider.requestTokenURL"), getURL(
baseURL, name + ".serviceProvider.userAuthorizationURL"),
getURL(baseURL, name + ".serviceProvider.accessTokenURL"));
OAuthConsumer consumer = new OAuthConsumer(consumerProperties
.getProperty(name + ".callbackURL"), consumerProperties
.getProperty(name + ".consumerKey"), consumerProperties
.getProperty(name + ".consumerSecret"), serviceProvider);
consumer.setProperty("name", name);
if (baseURL != null) {
consumer.setProperty("serviceProvider.baseURL", baseURL);
}
for (Map.Entry prop : consumerProperties.entrySet()) {
String propName = (String) prop.getKey();
if (propName.startsWith(name + ".consumer.")) {
String c = propName.substring(name.length() + 10);
consumer.setProperty(c, prop.getValue());
}
}
return consumer;
}
private String getURL(URL base, String name) throws MalformedURLException {
String url = consumerProperties.getProperty(name);
if (base != null) {
url = (new URL(base, url)).toExternalForm();
}
return url;
}
}