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Diffstat (limited to 'sca-java-1.x/branches/sca-java-1.2.1/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANodeFactory.java')
-rw-r--r-- | sca-java-1.x/branches/sca-java-1.2.1/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANodeFactory.java | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-1.2.1/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANodeFactory.java b/sca-java-1.x/branches/sca-java-1.2.1/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANodeFactory.java new file mode 100644 index 0000000000..1cba8a08f4 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.2.1/modules/node-api/src/main/java/org/apache/tuscany/sca/node/SCANodeFactory.java @@ -0,0 +1,161 @@ +/* + * 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 nodeURI 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 dervied 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); + } + } + +} |