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SwitchYardComponentService.java
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SwitchYardComponentService.java
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/*
* Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors.
*
* 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.switchyard.as7.extension.services;
import java.util.Map;
import java.util.Set;
import javax.xml.namespace.QName;
import org.jboss.dmr.ModelNode;
import org.jboss.jca.core.spi.rar.ResourceAdapterRepository;
import org.jboss.logging.Logger;
import org.jboss.modules.Module;
import org.jboss.modules.ModuleIdentifier;
import org.jboss.modules.ModuleLoadException;
import org.jboss.msc.inject.Injector;
import org.jboss.msc.service.Service;
import org.jboss.msc.service.ServiceName;
import org.jboss.msc.service.StartContext;
import org.jboss.msc.service.StartException;
import org.jboss.msc.service.StopContext;
import org.jboss.msc.value.InjectedValue;
import org.switchyard.as7.extension.CommonAttributes;
import org.switchyard.as7.extension.ExtensionLogger;
import org.switchyard.config.Configuration;
import org.switchyard.config.ConfigurationPuller;
import org.switchyard.config.Configurations;
import org.switchyard.deploy.Component;
/**
* The SwitchYard Component service.
*
* @author Magesh Kumar B <mageshbk@jboss.com> (C) 2011 Red Hat Inc.
*/
public class SwitchYardComponentService implements Service<Component> {
private static final Logger LOG = Logger.getLogger("org.switchyard");
/**
* Represents a SwitchYard Component initializer service name.
*/
public static final ServiceName SERVICE_NAME = ServiceName.of("SwitchYardComponentService");
private final InjectedValue<Map> _injectedValues = new InjectedValue<Map>();
private final InjectedValue<ResourceAdapterRepository> _resourceAdapterRepository = new InjectedValue<ResourceAdapterRepository>();
private String _moduleId;
private ModelNode _model;
private Component _component;
/**
* Constructs a SwitchYard Component service.
*
* @param moduleId the module identifier
* @param model the Module's model operation
*/
public SwitchYardComponentService(String moduleId, ModelNode model) {
_moduleId = moduleId;
_model = model;
}
@Override
public Component getValue() throws IllegalStateException,
IllegalArgumentException {
return _component;
}
@Override
public void start(StartContext context) throws StartException {
Class<?> componentClass;
String className = _model.get(CommonAttributes.IMPLCLASS).asString();
try {
componentClass = Module.loadClassFromCallerModuleLoader(ModuleIdentifier.fromString(_moduleId), className);
try {
_component = (Component) componentClass.newInstance();
ModelNode properties = _model.hasDefined(CommonAttributes.PROPERTIES) ? _model.get(CommonAttributes.PROPERTIES) : null;
_component.init(createEnvironmentConfig(properties));
LOG.debug("Initialized component " + _component);
_component.addResourceDependency(_resourceAdapterRepository.getValue());
} catch (InstantiationException ie) {
ExtensionLogger.ROOT_LOGGER.unableToInstantiateClass(className, ie);
} catch (IllegalAccessException iae) {
ExtensionLogger.ROOT_LOGGER.unableToAccessConstructor(className, iae);
}
} catch (ClassNotFoundException cnfe) {
ExtensionLogger.ROOT_LOGGER.unableToLoadClass(className, cnfe);
} catch (ModuleLoadException mle) {
ExtensionLogger.ROOT_LOGGER.unableToLoadModule(_moduleId, mle);
}
}
private Configuration createEnvironmentConfig(ModelNode properties) {
Configuration envConfig = Configurations.newConfiguration();
if (properties != null) {
Set<String> propertyNames = properties.keys();
if (propertyNames != null) {
for (String propertyName : propertyNames) {
Configuration propConfig = new ConfigurationPuller().pull(new QName(propertyName));
String value = properties.get(propertyName).asString();
if (value.startsWith(CommonAttributes.DOLLAR)) {
String key = value.substring(1);
String injectedValue = (String) _injectedValues.getValue().get(key);
if (injectedValue != null) {
propConfig.setValue(injectedValue);
envConfig.addChild(propConfig);
}
} else {
propConfig.setValue(value);
envConfig.addChild(propConfig);
}
}
}
}
return envConfig;
}
@Override
public void stop(StopContext context) {
LOG.info("Stopping SwitchYard component " + _component.getName());
try {
_component.destroy();
} catch (Exception e) {
ExtensionLogger.ROOT_LOGGER.unableToStop(_component.getName(), e);
}
}
/**
* Injection point for injectValues.
*
* @return a map of injected values
*/
public InjectedValue<Map> getInjectedValues() {
return _injectedValues;
}
/**
* Injection point for ResourceAdapterRepository.
* @return ResourceAdapterRepository
*/
public Injector<ResourceAdapterRepository> getResourceAdapterRepository() {
return _resourceAdapterRepository;
}
}