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/*
* 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.Constructor;
import org.osoa.sca.ServiceRuntimeException;
/**
* A factory for SCA processing nodes. An SCA processing node can be loaded
* with an SCA composite.
*
* @version $Rev: 579871 $ $Date: 2007-09-27 03:20:34 +0100 (Thu, 27 Sep 2007) $
*/
public abstract class SCANodeFactory {
/**
* Returns a new SCA node factory instance.
*
* @return a new SCA node factory
*/
public static SCANodeFactory newInstance() {
SCANodeFactory scaNodeFactory = null;
try {
final ClassLoader classLoader = SCANodeFactory.class.getClassLoader();
String className = "org.apache.tuscany.sca.node.impl.SCANodeFactoryImpl";
Class cls = Class.forName(className, true, classLoader);
Constructor<?> constructor = null;
try {
constructor = cls.getConstructor();
} catch (NoSuchMethodException e) {
// ignore
}
if (constructor != null) {
scaNodeFactory = (SCANodeFactory)constructor.newInstance();
}
return scaNodeFactory;
} catch (Exception e) {
throw new ServiceRuntimeException(e);
}
}
/**
* Creates a new SCA node.
*
* @param nodeURI the URI of the node, this is the endpoint URI of the
* node administration service
* @param domainURI the URI of the domain that the node belongs to
* @return a new SCA node.
*/
public abstract SCANode createSCANode(String nodeURI, String domainURI) throws NodeException;
/**
* Creates a new SCA node as part of a node group. Groups of nodes are used in load balancing
* and failover scenarios where each node in the group runs the same contribution and
* active composites
*
* @param nodeURI the URI of the node, this is the endpoint URI of the
* node administration service
* @param domainURI the URI of the domain that the node belongs to
* @param nodeGroupURI the uri of the node group. This is the enpoint URI of the head of the
* group of nodes. For example, in load balancing scnearios this will be the loaded balancer itself
* @return a new SCA node.
*/
public abstract SCANode createSCANode(String nodeURI, String domainURI, String nodeGroupURI) throws NodeException;
}
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