Creating Java SCA 1.x branch

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@713805 13f79535-47bb-0310-9956-ffa450edef68

9 files changed, 876 insertions, 0 deletions

diff --git a/branches/sca-java-1.x/modules/node-api/LICENSE b/branches/sca-java-1.x/modules/node-api/LICENSE
new file mode 100644
index 0000000000..6e529a25c4
--- /dev/null
+++ b/branches/sca-java-1.x/modules/node-api/LICENSE
@@ -0,0 +1,205 @@
+

+                                 Apache License

+                           Version 2.0, January 2004

+                        http://www.apache.org/licenses/

+

+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

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+   1. Definitions.

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+      "License" shall mean the terms and conditions for use, reproduction,

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+      form, that is based on (or derived from) the Work and for which the

+      editorial revisions, annotations, elaborations, or other modifications

+      represent, as a whole, an original work of authorship. For the purposes

+      of this License, Derivative Works shall not include works that remain

+      separable from, or merely link (or bind by name) to the interfaces of,

+      the Work and Derivative Works thereof.

+

+      "Contribution" shall mean any work of authorship, including

+      the original version of the Work and any modifications or additions

+      to that Work or Derivative Works thereof, that is intentionally

+      submitted to Licensor for inclusion in the Work by the copyright owner

+      or by an individual or Legal Entity authorized to submit on behalf of

+      the copyright owner. For the purposes of this definition, "submitted"

+      means any form of electronic, verbal, or written communication sent

+      to the Licensor or its representatives, including but not limited to

+      communication on electronic mailing lists, source code control systems,

+      and issue tracking systems that are managed by, or on behalf of, the

+      Licensor for the purpose of discussing and improving the Work, but

+      excluding communication that is conspicuously marked or otherwise

+      designated in writing by the copyright owner as "Not a Contribution."

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+      "Contributor" shall mean Licensor and any individual or Legal Entity

+      on behalf of whom a Contribution has been received by Licensor and

+      subsequently incorporated within the Work.

+

+   2. Grant of Copyright License. Subject to the terms and conditions of

+      this License, each Contributor hereby grants to You a perpetual,

+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable

+      copyright license to reproduce, prepare Derivative Works of,

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+      Work and such Derivative Works in Source or Object form.

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+      this License, each Contributor hereby grants to You a perpetual,

+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable

+      (except as stated in this section) patent license to make, have made,

+      use, offer to sell, sell, import, and otherwise transfer the Work,

+      where such license applies only to those patent claims licensable

+      by such Contributor that are necessarily infringed by their

+      Contribution(s) alone or by combination of their Contribution(s)

+      with the Work to which such Contribution(s) was submitted. If You

+      institute patent litigation against any entity (including a

+      cross-claim or counterclaim in a lawsuit) alleging that the Work

+      or a Contribution incorporated within the Work constitutes direct

+      or contributory patent infringement, then any patent licenses

+      granted to You under this License for that Work shall terminate

+      as of the date such litigation is filed.

+

+   4. Redistribution. You may reproduce and distribute copies of the

+      Work or Derivative Works thereof in any medium, with or without

+      modifications, and in Source or Object form, provided that You

+      meet the following conditions:

+

+      (a) You must give any other recipients of the Work or

+          Derivative Works a copy of this License; and

+

+      (b) You must cause any modified files to carry prominent notices

+          stating that You changed the files; and

+

+      (c) You must retain, in the Source form of any Derivative Works

+          that You distribute, all copyright, patent, trademark, and

+          attribution notices from the Source form of the Work,

+          excluding those notices that do not pertain to any part of

+          the Derivative Works; and

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+      (d) If the Work includes a "NOTICE" text file as part of its

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+          of the NOTICE file are for informational purposes only and

+          do not modify the License. You may add Your own attribution

+          notices within Derivative Works that You distribute, alongside

+          or as an addendum to the NOTICE text from the Work, provided

+          that such additional attribution notices cannot be construed

+          as modifying the License.

+

+      You may add Your own copyright statement to Your modifications and

+      may provide additional or different license terms and conditions

+      for use, reproduction, or distribution of Your modifications, or

+      for any such Derivative Works as a whole, provided Your use,

+      reproduction, and distribution of the Work otherwise complies with

+      the conditions stated in this License.

+

+   5. Submission of Contributions. Unless You explicitly state otherwise,

+      any Contribution intentionally submitted for inclusion in the Work

+      by You to the Licensor shall be under the terms and conditions of

+      this License, without any additional terms or conditions.

+      Notwithstanding the above, nothing herein shall supersede or modify

+      the terms of any separate license agreement you may have executed

+      with Licensor regarding such Contributions.

+

+   6. Trademarks. This License does not grant permission to use the trade

+      names, trademarks, service marks, or product names of the Licensor,

+      except as required for reasonable and customary use in describing the

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+   7. Disclaimer of Warranty. Unless required by applicable law or

+      agreed to in writing, Licensor provides the Work (and each

+      Contributor provides its Contributions) on an "AS IS" BASIS,

+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or

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+      whether in tort (including negligence), contract, or otherwise,

+      unless required by applicable law (such as deliberate and grossly

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+

diff --git a/branches/sca-java-1.x/modules/node-api/NOTICE b/branches/sca-java-1.x/modules/node-api/NOTICE
new file mode 100644
index 0000000000..1325efd8bf
--- /dev/null
+++ b/branches/sca-java-1.x/modules/node-api/NOTICE
@@ -0,0 +1,6 @@
+${pom.name}

+Copyright (c) 2005 - 2008 The Apache Software Foundation

+

+This product includes software developed by

+The Apache Software Foundation (http://www.apache.org/).

+

diff --git a/branches/sca-java-1.x/modules/node-api/pom.xml b/branches/sca-java-1.x/modules/node-api/pom.xml
new file mode 100644
index 0000000000..02210daa88
--- /dev/null
+++ b/branches/sca-java-1.x/modules/node-api/pom.xml
@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="UTF-8"?>

+<!--

+ * 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.

+-->

+<project>

+

+    <modelVersion>4.0.0</modelVersion>

+    <parent>

+        <groupId>org.apache.tuscany.sca</groupId>

+        <artifactId>tuscany-modules</artifactId>

+        <version>1.4-SNAPSHOT</version>

+        <relativePath>../pom.xml</relativePath>

+    </parent>

+

+    <artifactId>tuscany-node-api</artifactId>

+    <name>Apache Tuscany SCA Node API</name>

+

+    <dependencies>   

+        <dependency>

+            <groupId>org.apache.tuscany.sca</groupId>

+            <artifactId>tuscany-sca-api</artifactId>

+            <version>1.4-SNAPSHOT</version>

+        </dependency>

+    </dependencies>

+

+

+    <build>

+        <plugins>

+            <plugin>

+                <groupId>org.apache.felix</groupId>

+                <artifactId>maven-bundle-plugin</artifactId>

+

+                <configuration>

+                    <instructions>

+                        <Bundle-Version>${tuscany.version}</Bundle-Version>

+                        <Bundle-SymbolicName>org.apache.tuscany.sca.node.api</Bundle-SymbolicName>

+                        <Bundle-Description>${pom.name}</Bundle-Description>

+                        <Export-Package>org.apache.tuscany.sca.node*</Export-Package>

+                        <DynamicImport-Package>org.apache.tuscany.sca.node.impl,org.apache.tuscany.sca.extensibility</DynamicImport-Package>

+                    </instructions>

+                </configuration>

+            </plugin>

+        </plugins>

+    </build>

+

+</project>

diff --git a/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCAClient.java b/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCAClient.java
new file mode 100644
index 0000000000..f390e8881e
--- /dev/null
+++ b/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCAClient.java
@@ -0,0 +1,71 @@
+/*
+ * 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.tuscany.sca.node;
+
+import org.osoa.sca.CallableReference;
+import org.osoa.sca.ServiceReference;
+
+
+/**
+ * Provides client access to the services in a domain.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface SCAClient {
+
+    /**
+     * Cast a type-safe reference to a CallahbleReference. Converts a type-safe
+     * reference to an equivalent CallableReference; if the target refers to a
+     * service then a ServiceReference will be returned, if the target refers to
+     * a callback then a CallableReference will be returned.
+     *
+     * @param target a reference proxy provided by the SCA runtime
+     * @param <B> the Java type of the business interface for the reference
+     * @param <R> the type of reference to be returned
+     * @return a CallableReference equivalent for the proxy
+     * @throws IllegalArgumentException if the supplied instance is not a
+     *             reference supplied by the SCA runtime
+     */
+    <B, R extends CallableReference<B>> R cast(B target) throws IllegalArgumentException;
+
+    /**
+     * Returns a proxy for a service provided by a component in the SCA domain.
+     *
+     * @param businessInterface the interface that will be used to invoke the
+     *            service
+     * @param serviceName the name of the service
+     * @param <B> the Java type of the business interface for the service
+     * @return an object that implements the business interface
+     */
+    <B> B getService(Class<B> businessInterface, String serviceName);
+
+    /**
+     * Returns a ServiceReference for a service provided by a component in the
+     * SCA domain.
+     *
+     * @param businessInterface the interface that will be used to invoke the
+     *            service
+     * @param serviceName the name of the service
+     * @param <B> the Java type of the business interface for the service
+     * @return a ServiceReference for the designated service
+     */
+    <B> ServiceReference<B> getServiceReference(Class<B> businessInterface, String serviceName);
+
+}
\ No newline at end of file
diff --git a/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCAContribution.java b/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCAContribution.java
new file mode 100644
index 0000000000..de7f352122
--- /dev/null
+++ b/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCAContribution.java
@@ -0,0 +1,54 @@
+/*
+ * 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.tuscany.sca.node;
+
+/**
+ * Represents an SCA contribution uri + location.
+ */
+public final class SCAContribution {
+    private String uri;
+    private String location;
+    
+    /**
+     * Constructs a new SCA contribution.
+     * 
+     * @param uri The URI that uniquely identifies the contribution in the SCA domain
+     * @param location The URL of the contribution archive
+     */
+    public SCAContribution(String uri, String location) {
+        this.uri = uri;
+        this.location = location;
+    }
+    
+    /**
+     * Get the URI of the contribution
+     * @return The URI that uniquely identifies the contribution in the SCA domain
+     */
+    public String getURI() {
+        return uri;
+    }
+    
+    /**
+     * The location of the contribution
+     * @return The URL of the contribution archive
+     */
+    public String getLocation() {
+        return location;
+    }
+}
\ No newline at end of file
diff --git a/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANode.java b/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANode.java
new file mode 100644
index 0000000000..fea749a57c
--- /dev/null
+++ b/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANode.java
@@ -0,0 +1,42 @@
+/*
+ * 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.tuscany.sca.node;
+
+
+
+/**
+ * Represents an SCA processing node.
+ * A node is loaded with an SCA composites. It can start and stop that composite.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface SCANode {
+
+    /**
+     * Start the composite loaded in the node.
+     */
+    void start();
+
+    /**
+     * Stop the composite loaded in the node.
+     */
+    void stop();
+
+}
diff --git a/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANode2.java b/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANode2.java
new file mode 100644
index 0000000000..a1d4ddb2b1
--- /dev/null
+++ b/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANode2.java
@@ -0,0 +1,33 @@
+/*
+ * 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.tuscany.sca.node;
+
+
+
+/**
+ * Represents an SCA processing node.
+ * A node is loaded with an SCA composites. It can start and stop that composite.
+ *
+ * @version $Rev$ $Date$
+ * @deprecated Use SCANode instead
+ */
+@Deprecated
+public interface SCANode2 extends SCANode {
+}
diff --git a/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANode2Factory.java b/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANode2Factory.java
new file mode 100644
index 0000000000..2b0dbc88eb
--- /dev/null
+++ b/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANode2Factory.java
@@ -0,0 +1,203 @@
+/*
+ * 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.tuscany.sca.node;
+
+import java.lang.reflect.InvocationTargetException;
+
+import org.osoa.sca.CallableReference;
+import org.osoa.sca.ServiceReference;
+import org.osoa.sca.ServiceRuntimeException;
+
+/**
+ * A factory for SCA processing nodes. An SCA processing node can be loaded
+ * with an SCA composite and the SCA contributions required by the composite.
+ * 
+ * @version $Rev$ $Date$
+ * @deprecated Use SCANodeFactory
+ */
+@Deprecated
+public abstract class SCANode2Factory {
+
+    public static class NodeProxy implements SCANode2, SCAClient {
+        private Object node;
+
+        private NodeProxy(Object node) {
+            super();
+            this.node = node;
+        }
+
+        public static <T> T createProxy(Class<T> type, Object node) {
+            try {
+                return type.getDeclaredConstructor(Object.class).newInstance(node);
+            } catch (Exception e) {
+                throw new IllegalArgumentException(e);
+            }
+        }
+
+        public <B, R extends CallableReference<B>> R cast(B target) throws IllegalArgumentException {
+            try {
+                return (R)node.getClass().getMethod("cast", Object.class).invoke(node, target);
+            } catch (Throwable e) {
+                handleException(e);
+                return null;
+            }
+        }
+
+        public <B> B getService(Class<B> businessInterface, String serviceName) {
+            try {
+                return (B)node.getClass().getMethod("getService", Class.class, String.class).invoke(node,
+                                                                                                    businessInterface,
+                                                                                                    serviceName);
+            } catch (Throwable e) {
+                handleException(e);
+                return null;
+            }
+        }
+
+        public <B> ServiceReference<B> getServiceReference(Class<B> businessInterface, String serviceName) {
+            try {
+                return (ServiceReference<B>)node.getClass().getMethod("getServiceReference", Class.class, String.class)
+                    .invoke(node, businessInterface, serviceName);
+            } catch (Throwable e) {
+                handleException(e);
+                return null;
+            }
+        }
+
+        public void start() {
+            try {
+                node.getClass().getMethod("start").invoke(node);
+            } catch (Throwable e) {
+                handleException(e);
+            }
+        }
+
+        public void stop() {
+            try {
+                node.getClass().getMethod("stop").invoke(node);
+            } catch (Throwable e) {
+                handleException(e);
+            }
+        }
+
+        private static void handleException(Throwable ex) {
+            if (ex instanceof InvocationTargetException) {
+                ex = ((InvocationTargetException)ex).getTargetException();
+            }
+            if (ex instanceof RuntimeException) {
+                throw (RuntimeException)ex;
+            }
+            if (ex instanceof Error) {
+                throw (Error)ex;
+            } else {
+                throw new RuntimeException(ex);
+            }
+        }
+
+    }
+
+    /**
+     * Returns a new SCA node factory instance.
+     *  
+     * @return a new SCA node factory
+     */
+    public static SCANode2Factory newInstance() {
+        SCANode2Factory scaNodeFactory = null;
+
+        try {
+            final ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+            // Use reflection APIs to call ServiceDiscovery to avoid hard dependency to tuscany-extensibility
+            try {
+                Class<?> discoveryClass =
+                    Class.forName("org.apache.tuscany.sca.extensibility.ServiceDiscovery", true, classLoader);
+                Object instance = discoveryClass.getMethod("getInstance").invoke(null);
+                Class<?> factoryImplClass =
+                    (Class<?>)discoveryClass.getMethod("loadFirstServiceClass", Class.class)
+                        .invoke(instance, SCANode2Factory.class);
+                if (factoryImplClass != null) {
+                    scaNodeFactory = (SCANode2Factory)factoryImplClass.newInstance();
+                    return scaNodeFactory;
+                }
+            } catch (ClassNotFoundException e) {
+                // Ignore 
+            }
+
+            // Fail back to default impl
+            String className = "org.apache.tuscany.sca.node.impl.Node2FactoryImpl";
+
+            Class<?> cls = Class.forName(className, true, classLoader);
+            scaNodeFactory = (SCANode2Factory)cls.newInstance();
+            return scaNodeFactory;
+
+        } catch (Exception e) {
+            throw new ServiceRuntimeException(e);
+        }
+    }
+
+    /**
+     * Create a SCA node based on the discovery of the contribution on the classpath for the 
+     * given classloader. This method should be treated a convinient shortcut with the following
+     * assumptions:
+     * <ul>
+     * <li>This is a standalone application and there is a deployable composite file on the classpath.
+     * <li>There is only one contribution which contains the deployable composite file physically in its packaging hierarchy.
+     * </ul> 
+     * @param compositeURI The URI of the composite file relative to the root of the enclosing contribution
+     * @param classLoader The ClassLoader used to load the composite file as a resource. If the value is null,
+     * then thread context classloader will be used
+     * @return A newly created SCA node
+     */
+    public abstract SCANode2 createSCANodeFromClassLoader(String compositeURI, ClassLoader classLoader);
+
+    /**
+     * Creates a new SCA node from the configuration URL
+     * 
+     * @param configurationURL the URL of the node configuration which is the ATOM feed
+     * that contains the URI of the composite and a collection of URLs for the contributions
+     *  
+     * @return a new SCA node.
+     */
+    public abstract SCANode2 createSCANodeFromURL(String configurationURL);
+
+    /**
+     * Creates a new SCA node.
+     * 
+     * @param compositeURI the URI of the composite to use 
+     * @param contributions the URI of the contributions that provides the composites and related 
+     * artifacts. If the list is empty, then we will use the thread context classloader to discover
+     * the contribution on the classpath
+     *   
+     * @return a new SCA node.
+     */
+    public abstract SCANode2 createSCANode(String compositeURI, SCAContribution... contributions);
+
+    /**
+     * Creates a new SCA node.
+     * 
+     * @param compositeURI the URI of the composite to use 
+     * @param compositeContent the XML content of the composite to use 
+     * @param contributions the URI of the contributions that provides the composites and related artifacts 
+     * @return a new SCA node.
+     */
+    public abstract SCANode2 createSCANode(String compositeURI,
+                                           String compositeContent,
+                                           SCAContribution... contributions);
+
+}
diff --git a/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANodeFactory.java b/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANodeFactory.java
new file mode 100644
index 0000000000..e41afd29c4
--- /dev/null
+++ b/branches/sca-java-1.x/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANodeFactory.java
@@ -0,0 +1,201 @@
+/*
+ * 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.tuscany.sca.node;
+
+import java.lang.reflect.InvocationTargetException;
+
+import org.osoa.sca.CallableReference;
+import org.osoa.sca.ServiceReference;
+import org.osoa.sca.ServiceRuntimeException;
+
+/**
+ * A factory for SCA processing nodes. An SCA processing node can be loaded
+ * with an SCA composite and the SCA contributions required by the composite.
+ * 
+ * @version $Rev$ $Date$
+ */
+public abstract class SCANodeFactory {
+
+    public static class NodeProxy implements SCANode, SCAClient {
+        private Object node;
+
+        private NodeProxy(Object node) {
+            super();
+            this.node = node;
+        }
+
+        public static <T> T createProxy(Class<T> type, Object node) {
+            try {
+                return type.getDeclaredConstructor(Object.class).newInstance(node);
+            } catch (Exception e) {
+                throw new IllegalArgumentException(e);
+            }
+        }
+
+        public <B, R extends CallableReference<B>> R cast(B target) throws IllegalArgumentException {
+            try {
+                return (R)node.getClass().getMethod("cast", Object.class).invoke(node, target);
+            } catch (Throwable e) {
+                handleException(e);
+                return null;
+            }
+        }
+
+        public <B> B getService(Class<B> businessInterface, String serviceName) {
+            try {
+                return (B)node.getClass().getMethod("getService", Class.class, String.class).invoke(node,
+                                                                                                    businessInterface,
+                                                                                                    serviceName);
+            } catch (Throwable e) {
+                handleException(e);
+                return null;
+            }
+        }
+
+        public <B> ServiceReference<B> getServiceReference(Class<B> businessInterface, String serviceName) {
+            try {
+                return (ServiceReference<B>)node.getClass().getMethod("getServiceReference", Class.class, String.class)
+                    .invoke(node, businessInterface, serviceName);
+            } catch (Throwable e) {
+                handleException(e);
+                return null;
+            }
+        }
+
+        public void start() {
+            try {
+                node.getClass().getMethod("start").invoke(node);
+            } catch (Throwable e) {
+                handleException(e);
+            }
+        }
+
+        public void stop() {
+            try {
+                node.getClass().getMethod("stop").invoke(node);
+            } catch (Throwable e) {
+                handleException(e);
+            }
+        }
+
+        private static void handleException(Throwable ex) {
+            if (ex instanceof InvocationTargetException) {
+                ex = ((InvocationTargetException)ex).getTargetException();
+            }
+            if (ex instanceof RuntimeException) {
+                throw (RuntimeException)ex;
+            }
+            if (ex instanceof Error) {
+                throw (Error)ex;
+            } else {
+                throw new RuntimeException(ex);
+            }
+        }
+
+    }
+
+    /**
+     * Returns a new SCA node factory instance.
+     *  
+     * @return a new SCA node factory
+     */
+    public static SCANodeFactory newInstance() {
+        SCANodeFactory scaNodeFactory = null;
+
+        try {
+            // final ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+            // Use reflection APIs to call ServiceDiscovery to avoid hard dependency to tuscany-extensibility
+            try {
+                Class<?> discoveryClass =
+                    Class.forName("org.apache.tuscany.sca.extensibility.ServiceDiscovery");
+                Object instance = discoveryClass.getMethod("getInstance").invoke(null);
+                Class<?> factoryImplClass =
+                    (Class<?>)discoveryClass.getMethod("loadFirstServiceClass", Class.class)
+                        .invoke(instance, SCANodeFactory.class);
+                if (factoryImplClass != null) {
+                    scaNodeFactory = (SCANodeFactory)factoryImplClass.newInstance();
+                    return scaNodeFactory;
+                }
+            } catch (ClassNotFoundException e) {
+                // Ignore 
+            }
+
+            // Fail back to default impl
+            String className = "org.apache.tuscany.sca.node.impl.NodeFactoryImpl";
+
+            Class<?> cls = Class.forName(className);
+            scaNodeFactory = (SCANodeFactory)cls.newInstance();
+            return scaNodeFactory;
+
+        } catch (Exception e) {
+            throw new ServiceRuntimeException(e);
+        }
+    }
+
+    /**
+     * Create a SCA node based on the discovery of the contribution on the classpath for the 
+     * given classloader. This method should be treated a convinient shortcut with the following
+     * assumptions:
+     * <ul>
+     * <li>This is a standalone application and there is a deployable composite file on the classpath.
+     * <li>There is only one contribution which contains the deployable composite file physically in its packaging hierarchy.
+     * </ul> 
+     * @param compositeURI The URI of the composite file relative to the root of the enclosing contribution
+     * @param classLoader The ClassLoader used to load the composite file as a resource. If the value is null,
+     * then thread context classloader will be used
+     * @return A newly created SCA node
+     */
+    public abstract SCANode createSCANodeFromClassLoader(String compositeURI, ClassLoader classLoader);
+
+    /**
+     * Creates a new SCA node from the configuration URL
+     * 
+     * @param configurationURL the URL of the node configuration which is the ATOM feed
+     * that contains the URI of the composite and a collection of URLs for the contributions
+     *  
+     * @return a new SCA node.
+     */
+    public abstract SCANode createSCANodeFromURL(String configurationURL);
+
+    /**
+     * Creates a new SCA node.
+     * 
+     * @param compositeURI the URI of the composite to use 
+     * @param contributions the URI of the contributions that provides the composites and related 
+     * artifacts. If the list is empty, then we will use the thread context classloader to discover
+     * the contribution on the classpath
+     *   
+     * @return a new SCA node.
+     */
+    public abstract SCANode createSCANode(String compositeURI, SCAContribution... contributions);
+
+    /**
+     * Creates a new SCA node.
+     * 
+     * @param compositeURI the URI of the composite to use 
+     * @param compositeContent the XML content of the composite to use 
+     * @param contributions the URI of the contributions that provides the composites and related artifacts 
+     * @return a new SCA node.
+     */
+    public abstract SCANode createSCANode(String compositeURI,
+                                          String compositeContent,
+                                          SCAContribution... contributions);
+
+}