read in byon config via yaml

sandbox-apis/byon/pom.xml

@@ -74,6 +74,11 @@
             <version>${project.version}</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.yaml</groupId>
+            <artifactId>snakeyaml</artifactId>
+            <version>1.6</version>
+        </dependency>
     </dependencies>
 
     <profiles>

sandbox-apis/byon/src/main/java/org/jclouds/byon/config/BYONComputeServiceContextModule.java

@@ -19,9 +19,14 @@
 
 package org.jclouds.byon.config;
 
+import java.io.InputStream;
+import java.io.IOException;
+import java.net.MalformedURLException;
 import java.net.URI;
+import java.net.URL;
 import java.util.Map;
 
+import javax.annotation.Resource;
 import javax.inject.Singleton;
 
 import org.jclouds.byon.Node;
@@ -29,11 +34,18 @@ import org.jclouds.byon.internal.BYONComputeServiceAdapter;
 import org.jclouds.compute.config.JCloudsNativeComputeServiceAdapterContextModule;
 import org.jclouds.concurrent.SingleThreaded;
 import org.jclouds.location.Provider;
+import org.jclouds.logging.Logger;
 
 import com.google.common.base.Supplier;
 import com.google.common.collect.ImmutableMap;
 import com.google.inject.Provides;
 
+import org.yaml.snakeyaml.constructor.Constructor;
+import org.yaml.snakeyaml.Loader;
+import org.yaml.snakeyaml.TypeDescription;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.error.YAMLException;
+
 /**
  * 
  * @author Adrian Cole
@@ -42,6 +54,8 @@ import com.google.inject.Provides;
 @SingleThreaded
 public class BYONComputeServiceContextModule extends
       JCloudsNativeComputeServiceAdapterContextModule<Supplier, Supplier> {
+   @Resource
+   protected Logger logger = Logger.NULL;
 
    public BYONComputeServiceContextModule() {
       super(Supplier.class, Supplier.class, BYONComputeServiceAdapter.class);
@@ -49,15 +63,33 @@ public class BYONComputeServiceContextModule extends
 
    @Provides
    @Singleton
-   Supplier<Map<String, Node>> provideNodeList(@Provider URI uri) {
+   Supplier<Map<String, Node>> provideNodeList(@Provider final URI uri) {
       return new Supplier<Map<String, Node>> (){
-
          @Override
          public Map<String, Node> get() {
-            // TODO parse uri into list, using yaml or something
-            return ImmutableMap.<String, Node> of();
+            Constructor constructor = new Constructor(Config.class);
+
+            TypeDescription configDesc = new TypeDescription(Config.class);
+            configDesc.putMapPropertyType("nodes", String.class, Node.class);
+            constructor.addTypeDescription(configDesc);
+
+            Yaml yaml = new Yaml(new Loader(constructor));
+
+            Config config;
+            try {
+               URL url = uri.toURL();
+               InputStream input = url.openStream();
+               config = (Config)yaml.load(input);
+            } catch(MalformedURLException e) {
+               logger.error(e, "URI is not a URL: %s", uri);
+               return ImmutableMap.<String, Node> of();
+            } catch(IOException e) {
+               logger.error(e, "URI could not be read: %s", uri);
+               return ImmutableMap.<String, Node> of();
+            }
+
+            return config.nodes;
          }
-         
       };
    }
 

sandbox-apis/byon/src/main/java/org/jclouds/byon/config/Config.java

@@ -0,0 +1,33 @@
+/**
+ *
+ * Copyright (C) 2010 Cloud Conscious, LLC. <info@cloudconscious.com>
+ *
+ * ====================================================================
+ * 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.jclouds.byon.config;
+
+import java.util.Map;
+
+import org.jclouds.byon.Node;
+
+/**
+ * Type-safe config class for YAML
+ *
+ * @author Kelvin Kakugawa
+ */
+public class Config {
+    public Map<String, Node> nodes;
+}