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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 java.net.URL;
import org.apache.tuscany.sca.node.util.SCAContributionUtil;
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);
}
}
private static SCANodeFactory singletonInstance;
/**
* Returns a singleton SCA node factory instance, and creates a new
* singleton instance if none exists.
*
* @return an SCA node factory
*/
public static SCANodeFactory getInstance() {
if (singletonInstance == null) {
singletonInstance = newInstance();
}
return singletonInstance;
}
/**
* Creates a new SCA node.
*
* @param physicalNodeURI the URI of the node, this URI is used to provide the default
* host and port information for the runtime for situations when bindings
* do provide this information
* @param domainURI the URI of the domain that the node belongs to. This URI is
* used to locate the domain manager on the network
* @return a new SCA node.
*/
public abstract SCANode createSCANode(String physicalNodeURI, String domainURI) throws NodeException;
/**
* Creates a new SCA node. Many physical nodes may share the same logical URL in load balancing
* and failover scenarios where each node in the group runs the same contribution and
* active composites
*
* @param physicalNodeURI the URI of the node, this URI is used to provide the default
* host and port information for the runtime for situations when bindings
* don't provide this information
* @param domainURI the URI of the domain that the node belongs to. This URI is
* used to locate the domain manager on the network
* @param logicalNodeURI the URI of the node to be used in situations where more than one node
* are grouped together for failover or load balancing scenarios. The logicalNodeURI
* will typically identify the logical node where requests are sent
* @return a new SCA node.
*/
public abstract SCANode createSCANode(String physicalNodeURI, String domainURI, String logicalNodeURI) throws NodeException;
/**
* Creates a new SCA node. Many physical nodes may share the same logical URL in load balancing
* and failover scenarios where each node in the group runs the same contribution and
* active composites. Also allows a class loaded to b specified. This is the
* ClassLoader that will be used to load the management application used by the
* node to talk to the domain
*
* @param physicalNodeURI the URI of the node, this URI is used to provide the default
* host and port information for the runtime for situations when bindings
* don't provide this information
* @param domainURI the URI of the domain that the node belongs to. This URI is
* used to locate the domain manager on the network
* @param logicalNodeURI the URI of the node to be used in situations where more than one node
* are grouped together for failover or load balancing scenarios. The logicalNodeURI
* will typically identify the logical node where requests are sent. If null is provided
* no logicalNodeURI is set.
* @param classLoader the class loader to use by default when loading contributions. If null is provided
* the ClassLoader the derived automatically.
* @return a new SCA node.
*/
public abstract SCANode createSCANode(String physicalNodeURI, String domainURI, String logicalNodeURI, ClassLoader classLoader) throws NodeException;
/**
* Convenience method to create and start a node and embedded domain
* that deploys a single composite within a single contribution.
*
* @param composite the composite to be deployed.
* @return a new SCA node.
*/
public static SCANode createNodeWithComposite(String composite) throws NodeException {
try {
final ClassLoader loader = Thread.currentThread().getContextClassLoader();
final URL url = SCAContributionUtil.findContributionFromResource(loader, composite);
final SCANode node = getInstance().createSCANode(null, null);
node.addContribution(url.toString(), url);
node.addToDomainLevelComposite(composite);
node.start();
return node;
} catch (Exception e) {
throw new NodeException(e);
}
}
}
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