package org.apache.fulcrum.yaafi.framework.container;
/*
* 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.
*/
import java.io.File;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Properties;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.configuration.DefaultConfiguration;
import org.apache.avalon.framework.configuration.DefaultConfigurationBuilder;
import org.apache.avalon.framework.container.ContainerUtil;
import org.apache.avalon.framework.context.Context;
import org.apache.avalon.framework.context.ContextException;
import org.apache.avalon.framework.context.DefaultContext;
import org.apache.avalon.framework.logger.Logger;
import org.apache.avalon.framework.parameters.ParameterException;
import org.apache.avalon.framework.parameters.Parameters;
import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.fulcrum.yaafi.framework.component.AvalonServiceComponentImpl;
import org.apache.fulcrum.yaafi.framework.component.ServiceComponent;
import org.apache.fulcrum.yaafi.framework.configuration.ComponentConfigurationPropertiesResolver;
import org.apache.fulcrum.yaafi.framework.configuration.ComponentConfigurationPropertiesResolverImpl;
import org.apache.fulcrum.yaafi.framework.constant.AvalonYaafiConstants;
import org.apache.fulcrum.yaafi.framework.context.AvalonToYaafiContextMapper;
import org.apache.fulcrum.yaafi.framework.context.YaafiToAvalonContextMapper;
import org.apache.fulcrum.yaafi.framework.role.RoleConfigurationParser;
import org.apache.fulcrum.yaafi.framework.role.RoleConfigurationParserImpl;
import org.apache.fulcrum.yaafi.framework.role.RoleEntry;
import org.apache.fulcrum.yaafi.framework.util.ConfigurationUtil;
import org.apache.fulcrum.yaafi.framework.util.InputStreamLocator;
import org.apache.fulcrum.yaafi.framework.util.StringUtils;
import org.apache.fulcrum.yaafi.framework.util.ToStringBuilder;
import org.apache.fulcrum.yaafi.framework.util.Validate;
import org.apache.fulcrum.yaafi.framework.crypto.CryptoStreamFactory;
/**
* Yet another avalon framework implementation (YAAFI).
*
* @author <a href="mailto:siegfried.goeschl@it20one.at">Siegfried Goeschl</a>
*/
public class ServiceContainerImpl
implements ServiceContainer, ServiceConstants
{
/** the timeout before reconfiguring the container or services */
private static final int RECONFIGURATION_DELAY = 2000;
/** The role configuration file to be used */
private String componentRolesLocation;
/** is the component role file encrypted? */
private String isComponentRolesEncrypted;
/** which flavour of component role file we have to parse? */
private String componentRolesFlavour;
/** The service configuration file to be used */
private String componentConfigurationLocation;
/** is the component configuration file encrypted? */
private String isComponentConfigurationEncrypted;
/** The parameters file to be used */
private String parametersLocation;
/** is the parameters file encrypted? */
private String isParametersEncrypted;
/** The application directory aka the current woring directory */
private File applicationRootDir;
/** The directory for storing temporary files */
private File tempRootDir;
/** The logger to be used passed by the caller */
private Logger logger;
/** The service manager passed to the container */
private ServiceManager parentServiceManager;
/** The list of services instantiated */
private List serviceList;
/** The map of services used for the lookup */
private HashMap serviceMap;
/** The Avalon role configuration loaded by this class */
private Configuration roleConfiguration;
/** The Avalon service configuration loaded by this class */
private Configuration serviceConfiguration;
/** The temporary Avalon context passed to the implementation */
private Context callerContext;
/** The default Avalon context passed to the services */
private Context context;
/** The default Avalon parameters */
private Parameters parameters;
/** Is this instance already disposed? */
private boolean isDisposed;
/** The type of container where YAAFI is embedded */
private String containerFlavour;
/** The ms to wait before triggering a reconfiguration of the container os service */
private int reconfigurationDelay;
/** global flag for enabling/disabling dynamic proxies */
private boolean hasDynamicProxies;
/** The list of interceptor services applied to all services */
private ArrayList defaultInterceptorServiceList;
/** The list of ServiceManagers as fallback service lookup */
private ArrayList fallbackServiceManagerList;
/** the configuration for running the ComponentConfigurationPropertiesResolver */
private Configuration componentConfigurationPropertiesResolverConfig;
/////////////////////////////////////////////////////////////////////////
// Avalon Service Lifecycle
/////////////////////////////////////////////////////////////////////////
/**
* Constructor using sensible defaults.
*/
public ServiceContainerImpl()
{
super();
this.reconfigurationDelay = RECONFIGURATION_DELAY;
this.containerFlavour = COMPONENT_CONTAINERFLAVOUR_VALUE;
this.componentRolesFlavour = COMPONENT_ROLECONFIGFLAVOUR_VALUE;
this.componentRolesLocation = COMPONENT_ROLE_VALUE;
this.componentConfigurationLocation = COMPONENT_CONFIG_VALUE;
this.parametersLocation = COMPONENT_PARAMETERS_VALUE;
this.isComponentConfigurationEncrypted = "false";
this.isComponentRolesEncrypted = "false";
this.isParametersEncrypted = "false";
this.isDisposed = false;
this.serviceList = new ArrayList();
this.serviceMap = new HashMap();
this.applicationRootDir = new File( new File("").getAbsolutePath() );
this.tempRootDir = new File( System.getProperty("java.io.tmpdir",".") );
this.fallbackServiceManagerList = new ArrayList();
this.defaultInterceptorServiceList = new ArrayList();
this.reconfigurationDelay = RECONFIGURATION_DELAY;
}
/**
* @see org.apache.avalon.framework.logger.LogEnabled#enableLogging(org.apache.avalon.framework.logger.Logger)
*/
public void enableLogging(Logger logger)
{
Validate.notNull( logger, "logger" );
this.logger = logger;
}
/**
* @see org.apache.avalon.framework.context.Contextualizable#contextualize(org.apache.avalon.framework.context.Context)
*/
public void contextualize(Context context) throws ContextException
{
Validate.notNull( context, "context" );
// Argghhh - I need to to parse the Configuration before I can map the Context
this.callerContext = context;
}
/**
* @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)
*/
public void service(ServiceManager serviceManager) throws ServiceException
{
this.parentServiceManager = serviceManager;
}
/**
* @see org.apache.avalon.framework.configuration.Configurable#configure(org.apache.avalon.framework.configuration.Configuration)
*/
public void configure(Configuration configuration) throws ConfigurationException
{
Validate.notNull( configuration, "configuration" );
// retrieve the reconfigurationDelay
this.reconfigurationDelay =
configuration.getChild(RECONFIGURATION_DELAY_KEY).getValueAsInteger(
RECONFIGURATION_DELAY
);
// evaluate if we are using dynamic proxies
this.hasDynamicProxies =
configuration.getChild(DYNAMICPROXY_ENABLED_KEY).getValueAsBoolean(false);
// retrieve the container flavour
this.setContainerFlavour(
configuration.getChild(CONTAINERFLAVOUR_CONFIG_KEY).getValue(
COMPONENT_CONTAINERFLAVOUR_VALUE )
);
this.getLogger().debug( "Using the following container type : " + this.getContainerFlavour() );
// process the caller-suppied context here
try
{
// instantiate a mapper using the existing context - it might
// contain application specific entries we are not aware of
AvalonToYaafiContextMapper mapper = new AvalonToYaafiContextMapper(
this.getTempRootDir(),
this.callerContext,
this.getClassLoader()
);
// do the magic mapping
this.context = mapper.mapFrom(
this.callerContext,
this.getContainerFlavour()
);
// don't keep a reference of the caller-supplide context
this.callerContext = null;
}
catch( ContextException e )
{
String msg = "Failed to parse the caller-supplied context";
this.getLogger().error( msg, e );
throw new ConfigurationException( msg );
}
// evaluate componentRoles
Configuration currComponentRoles = configuration.getChild(COMPONENT_ROLE_KEYS);
this.setComponentRolesLocation(
currComponentRoles.getChild(COMPONENT_LOCATION_KEY).getValue(
COMPONENT_ROLE_VALUE )
);
this.setComponentRolesFlavour(
currComponentRoles.getChild(CONTAINERFLAVOUR_CONFIG_KEY).getValue(
COMPONENT_ROLECONFIGFLAVOUR_VALUE )
);
this.setComponentRolesEncrypted(
currComponentRoles.getChild(COMPONENT_ISENCRYPTED_KEY).getValue(
"false" )
);
// evaluate componentConfiguraion
Configuration currComponentConfiguration = configuration.getChild(COMPONENT_CONFIG_KEY);
this.setComponentConfigurationLocation(
currComponentConfiguration.getChild(COMPONENT_LOCATION_KEY).getValue(
COMPONENT_CONFIG_VALUE )
);
this.setComponentConfigurationEncrypted(
currComponentConfiguration.getChild(COMPONENT_ISENCRYPTED_KEY).getValue(
"false" )
);
// get the configuration for componentConfigurationPropertiesResolver
this.componentConfigurationPropertiesResolverConfig = configuration.getChild(
COMPONENT_CONFIG_PROPERTIES_KEY
);
// evaluate parameters
Configuration currParameters = configuration.getChild(COMPONENT_PARAMETERS_KEY);
this.setParametersLocation(
currParameters.getChild(COMPONENT_LOCATION_KEY).getValue(
COMPONENT_PARAMETERS_VALUE )
);
this.setParametersEncrypted(
currParameters.getChild(COMPONENT_ISENCRYPTED_KEY).getValue(
"false" )
);
// evaluate the default interceptors
Configuration currInterceptorList = configuration.getChild(
INTERCEPTOR_LIST_KEY
);
Configuration[] interceptorConfigList = currInterceptorList.getChildren(
INTERCEPTOR_KEY
);
for( int i=0; i<interceptorConfigList.length; i++ )
{
String interceptorServiceName = interceptorConfigList[i].getValue(null);
if( !StringUtils.isEmpty(interceptorServiceName) && this.hasDynamicProxies())
{
this.defaultInterceptorServiceList.add( interceptorServiceName );
this.getLogger().debug("Using the following default interceptor service : "
+ interceptorServiceName
);
}
}
// evaluate a list of service managers managing their own set of services
// independent from the Avalon container. This service managers are used
// to find services implemented as Spring bean or remote webservices.
Configuration currServiceManagerList = configuration.getChild(
SERVICEMANAGER_LIST_KEY
);
Configuration[] serviceManagerConfigList = currServiceManagerList.getChildren(
SERVICEMANAGER_KEY
);
for( int i=0; i<serviceManagerConfigList.length; i++ )
{
String serviceManagerName = serviceManagerConfigList[i].getValue(null);
if( !StringUtils.isEmpty(serviceManagerName) )
{
this.fallbackServiceManagerList.add( serviceManagerName );
this.getLogger().debug("Using the following fallback service manager : "
+ serviceManagerName
);
}
}
}
/**
* @see org.apache.avalon.framework.parameters.Parameterizable#parameterize(org.apache.avalon.framework.parameters.Parameters)
*/
public void parameterize(Parameters parameters) throws ParameterException
{
this.parameters = parameters;
}
/**
* @see org.apache.avalon.framework.activity.Initializable#initialize()
*/
public void initialize() throws Exception
{
this.getLogger().debug( "YAAFI Service Framework is starting up");
// set the directories being used
this.setApplicationRootDir(
(File) this.getContext().get(AvalonYaafiConstants.URN_AVALON_HOME )
);
this.setTempRootDir(
(File) this.getContext().get(AvalonYaafiConstants.URN_AVALON_TEMP )
);
// get the configuration files
this.roleConfiguration = loadConfiguration(
this.componentRolesLocation,
this.isComponentRolesEncrypted()
);
if( this.roleConfiguration == null )
{
String msg = "Unable to locate the role configuration : " + this.componentRolesLocation;
this.getLogger().error( msg );
throw new ConfigurationException( msg );
}
this.serviceConfiguration = loadConfiguration(
this.componentConfigurationLocation,
this.isComponentConfigurationEncrypted()
);
// create the configuration properties
Properties componentConfigurationProperties = this.loadComponentConfigurationProperties();
// expand the componentConfiguration using the componentConfigurationProperties
ConfigurationUtil.expand(
this.getLogger(),
(DefaultConfiguration) this.serviceConfiguration,
componentConfigurationProperties
);
// create the default parameters
if( this.getParameters() == null )
{
this.parameters= this.loadParameters(
this.parametersLocation,
this.isParametersEncrypted()
);
}
// create the service implementaion instances
List currServiceList = this.createServiceComponents(
this.roleConfiguration,
this.getLogger()
);
this.setServiceList( currServiceList );
// fill the service map mapping from a service name to an instance
for( int i=0; i<this.getServiceList().size(); i++ )
{
ServiceComponent serviceComponent = (ServiceComponent) this.getServiceList().get(i);
this.getServiceMap().put( serviceComponent.getName(), serviceComponent );
}
// ensure that fallback service managers are available
for(int i=0; i<this.fallbackServiceManagerList.size(); i++)
{
String currServiceManagerName = (String) this.fallbackServiceManagerList.get(i);
if(this.getServiceMap().get(currServiceManagerName) == null)
{
String msg = "The following fallback service manager was not found : " + currServiceManagerName;
throw new IllegalArgumentException(msg);
}
}
// run the various lifecycle stages
this.incarnateAll( this.getServiceList() );
// we are up and running
this.isDisposed = false;
this.getLogger().debug( "YAAFI Avalon Service Container is up and running");
}
/**
* Disposes the service container implementation.
*
* @see org.apache.avalon.framework.activity.Disposable#dispose()
*/
public synchronized void dispose()
{
if( this.isDisposed )
{
return;
}
if( this.getLogger() != null )
{
this.getLogger().debug("Disposing all services");
}
// decommision all servcies
this.decommisionAll( this.getServiceList() );
// dispose all servcies
this.disposeAll( this.getServiceList() );
// clean up
this.getServiceList().clear();
this.getServiceMap().clear();
this.componentRolesLocation = null;
this.componentConfigurationLocation = null;
this.context = null;
this.parametersLocation = null;
this.roleConfiguration = null;
this.serviceConfiguration = null;
this.parameters = null;
this.fallbackServiceManagerList = null;
this.defaultInterceptorServiceList = null;
this.isDisposed = true;
if( this.getLogger() != null )
{
this.getLogger().debug( "All services are disposed" );
}
}
/**
* Reconfiguring the services. I'm not sure how to implement this properly since
* the Avalon docs is vague on this subject. For now we suspend, reconfigure and
* resume the services in the correct order.
*
* @see org.apache.avalon.framework.configuration.Reconfigurable#reconfigure(org.apache.avalon.framework.configuration.Configuration)
*/
public synchronized void reconfigure(Configuration configuration)
throws ConfigurationException
{
Validate.notNull( configuration, "configuration" );
int exceptionCounter = 0;
ServiceComponent serviceComponent = null;
this.getLogger().warn("Reconfiguring all services ...");
// 1) wait for some time
this.waitForReconfiguration();
// 2) store the new configuration
this.serviceConfiguration = configuration;
Properties componentConfigurationProperties = this.loadComponentConfigurationProperties();
ConfigurationUtil.expand(
this.getLogger(),
(DefaultConfiguration) this.serviceConfiguration,
componentConfigurationProperties
);
// 3) reconfigure the services
for( int i=0; i<this.getServiceList().size(); i++ )
{
serviceComponent = (ServiceComponent) this.getServiceList().get(i);
Configuration serviceComponentConfiguraton = this.getServiceConfiguration().getChild(
serviceComponent.getShorthand()
);
try
{
serviceComponent.setConfiguration(serviceComponentConfiguraton);
serviceComponent.reconfigure();
}
catch(Throwable t)
{
String msg = "Reconfiguring of " + serviceComponent.getShorthand() + " failed";
this.getLogger().error(msg);
exceptionCounter++;
}
}
// 4) check the result
if( exceptionCounter > 0 )
{
String msg = "The reconfiguration failed with " + exceptionCounter + " exception(s)";
this.getLogger().error(msg);
throw new ConfigurationException(msg);
}
}
/////////////////////////////////////////////////////////////////////////
// Server Interface Implementation
/////////////////////////////////////////////////////////////////////////
/**
* @see org.apache.fulcrum.yaafi.framework.container.ServiceLifecycleManager#getRoleEntry(java.lang.String)
*/
public synchronized RoleEntry getRoleEntry(String name)
throws ServiceException
{
return this.getServiceComponentEx(name).getRoleEntry();
}
/**
* @see org.apache.fulcrum.yaafi.framework.container.ServiceLifecycleManager#getRoleEntries()
*/
public synchronized RoleEntry[] getRoleEntries()
{
List serviceList = this.getServiceList();
ServiceComponent serviceComponent = null;
RoleEntry[] result = new RoleEntry[serviceList.size()];
for( int i=0; i<result.length; i++ )
{
serviceComponent = (ServiceComponent) serviceList.get(i);
result[i] = serviceComponent.getRoleEntry();
}
return result;
}
/**
* @see org.apache.fulcrum.yaafi.framework.container.ServiceLifecycleManager#reconfigure(java.lang.String[])
*/
public synchronized void reconfigure(String[] names) throws ServiceException,
ConfigurationException
{
Validate.notNull(names,"names");
Validate.noNullElements(names,"names");
this.waitForReconfiguration();
for( int i=0; i<names.length; i++ )
{
// ensure that the service exists since during our reconfiguration
// we might use a stle recofniguration entry
if( this.getServiceMap().get(names[i]) != null )
{
this.reconfigure(names[i]);
}
}
}
/**
* @see org.apache.avalon.framework.service.ServiceManager#hasService(java.lang.String)
*/
public boolean hasService(String name)
{
Validate.notEmpty( name, "name" );
boolean result = false;
synchronized(this)
{
// look at our available service
result = (this.getLocalServiceComponent(name) != null);
// look at fallback service managers
if(!result)
{
result = this.hasFallbackService(name);
}
}
// if we haven't found anything ask the parent ServiceManager
if( (!result) && ( this.hasParentServiceManager() ) )
{
result = this.getParentServiceManager().hasService(name);
}
return result;
}
/**
* Lookup a service instance. The implementation uses the following
* mechanism
* <ul>
* <li>look for a matching local service
* <li>use the fallback service manager as they might know the service
* <li>ask the parent service manager
* </ul>
*
* @see org.apache.avalon.framework.service.ServiceManager#lookup(java.lang.String)
*/
public Object lookup(String name) throws ServiceException
{
Validate.notEmpty( name, "name" );
Object result = null;
ServiceComponent serviceManagerComponent = null;
try
{
synchronized (this)
{
// 1) check our local services
serviceManagerComponent = this.getLocalServiceComponent(name);
if( serviceManagerComponent != null )
{
result = serviceManagerComponent.getInstance();
if((result != null) && this.getLogger().isDebugEnabled())
{
String msg = "Located the service '" + name + "' in the local container";
this.getLogger().debug(msg);
}
}
// 2) look at fallback service managers
if(result == null)
{
result = this.getFallbackService(name);
}
}
}
catch(ServiceException e)
{
String msg = "Failed to lookup a service " + name;
this.getLogger().error( msg, e );
throw e;
}
catch( Throwable t )
{
String msg = "Failed to lookup a service " + name;
this.getLogger().error( msg, t );
throw new ServiceException( name, msg, t );
}
// 3) if we haven't found anything ask the parent ServiceManager
if( (result == null) && this.hasParentServiceManager() )
{
result = this.getParentServiceManager().lookup(name);
if((result != null) && this.getLogger().isDebugEnabled())
{
String msg = "Located the service '" + name + "' using the parent service manager";
this.getLogger().debug(msg);
}
}
// if we still haven't found anything then complain
if( result == null )
{
String msg = "The following component does not exist : " + name;
this.getLogger().error(msg);
throw new ServiceException( AvalonYaafiConstants.AVALON_CONTAINER_YAAFI, name );
}
return result;
}
/**
* @see org.apache.avalon.framework.service.ServiceManager#release(java.lang.Object)
*/
public void release(Object object)
{
// AFAIK this is only useful for lifecycle management regarding
// lifestyle other than singleton.
}
/**
* @see org.apache.fulcrum.yaafi.framework.container.ServiceContainer#decommision(java.lang.String)
*/
public synchronized void decommision(String name) throws ServiceException
{
this.waitForReconfiguration();
ServiceComponent serviceComponent = this.getServiceComponentEx(name);
this.decommision(serviceComponent);
}
/**
* @see org.apache.fulcrum.yaafi.framework.container.ServiceContainer#getParameters()
*/
public Parameters getParameters()
{
return this.parameters;
}
/////////////////////////////////////////////////////////////////////////
// Service Implementation
/////////////////////////////////////////////////////////////////////////
/**
* @see java.lang.Object#toString()
*/
public String toString()
{
ToStringBuilder toStringBuilder = new ToStringBuilder(this);
toStringBuilder.append("applicationRootDir", this.getApplicationRootDir());
toStringBuilder.append("tempRootDir", this.getTempRootDir());
toStringBuilder.append("componentRolesLocation", this.componentRolesLocation);
toStringBuilder.append("componentConfigurationLocation", this.componentConfigurationLocation);
toStringBuilder.append("parametersLocation", parametersLocation);
toStringBuilder.append("logger", this.getLogger().getClass().getName());
toStringBuilder.append("hasDynamicProxies", this.hasDynamicProxies);
toStringBuilder.append("containerFlavour", this.containerFlavour);
toStringBuilder.append("componentRolesFlavour", this.componentRolesFlavour);
toStringBuilder.append("isComponentRolesEncrypted", this.isComponentRolesEncrypted);
toStringBuilder.append("isComponentConfigurationEncrypted", this.isComponentConfigurationEncrypted);
toStringBuilder.append("isParametersEncrypted", this.isParametersEncrypted);
return toStringBuilder.toString();
}
/**
* Create a role configuration parser based on the container flavour.
* @return the role configuration parser
*/
private RoleConfigurationParser createRoleConfigurationParser()
{
return new RoleConfigurationParserImpl(
this.getComponentRolesFlavour()
);
}
/**
* Reconfigure a single service
*
* @param name the name of the service to be reconfigured
* @throws ServiceException the service was not found
* @throws ConfigurationException the reconfiguration failed
*/
private void reconfigure(String name)
throws ServiceException, ConfigurationException
{
Validate.notEmpty( name, "name" );
ServiceComponent serviceComponent = this.getServiceComponentEx(name);
// reconfigure the component
try
{
serviceComponent.reconfigure();
}
catch(ConfigurationException e)
{
String msg = "Reconfiguring failed : " + serviceComponent.getShorthand();
this.getLogger().error(msg,e);
throw new ConfigurationException(msg,e);
}
catch(Throwable t)
{
String msg = "Reconfiguring failed : " + serviceComponent.getShorthand();
this.getLogger().error(msg,t);
throw new ConfigurationException(msg,t);
}
}
/**
* Enforce that a service is known to simplify error handling.
*
* @param name the name of the service component
* @return the service component
* @throws ServiceException the service was not found
*/
private ServiceComponent getServiceComponentEx(String name)
throws ServiceException
{
Validate.notEmpty( name, "name" );
ServiceComponent result = (ServiceComponent) this. getServiceMap().get(name);
if( result == null )
{
String msg = "The following component does not exist : " + name;
this.getLogger().error(msg);
throw new ServiceException( AvalonYaafiConstants.AVALON_CONTAINER_YAAFI, name );
}
return result;
}
/**
* Try to get a local service component.
*
* @param name the name of the service component
* @return the service component if any
*/
private ServiceComponent getLocalServiceComponent(String name)
{
Validate.notEmpty( name, "name" );
ServiceComponent result = (ServiceComponent) this. getServiceMap().get(name);
return result;
}
/**
* Try to get a service component provided by a fallback service
* manager.
*
* @param name the name of the service component
* @return the service component if any
* @throws Exception getting the service failed
*/
private Object getFallbackService(String name) throws Exception
{
Validate.notEmpty( name, "name" );
Object result = null;
ServiceComponent serviceManagerComponent = null;
for(int i=0; i<this.fallbackServiceManagerList.size(); i++)
{
String serviceManagerComponentName = (String) fallbackServiceManagerList.get(i);
serviceManagerComponent = this.getLocalServiceComponent(serviceManagerComponentName);
if(serviceManagerComponent != null)
{
ServiceManager currServiceManager = (ServiceManager) serviceManagerComponent.getInstance();
if (currServiceManager.hasService(name))
{
result = currServiceManager.lookup(name);
if((result != null) && this.getLogger().isDebugEnabled())
{
String msg = "Located the service '" + name + "' using the fallback service manager '" + serviceManagerComponentName + "'";
this.getLogger().debug(msg);
}
}
}
}
return result;
}
/**
* Try to get a service provided by a fallback service manager.
*
* @param name the name of the service component
* @return the service component if any
*/
private boolean hasFallbackService(String name)
{
Validate.notEmpty( name, "name" );
ServiceComponent serviceManagerComponent = null;
for(int i=0; i<this.fallbackServiceManagerList.size(); i++)
{
String serviceManagerComponentName = (String) fallbackServiceManagerList.get(i);
serviceManagerComponent = this.getLocalServiceComponent(serviceManagerComponentName);
if(serviceManagerComponent != null)
{
ServiceManager currServiceManager;
try
{
currServiceManager = (ServiceManager) serviceManagerComponent.getInstance();
if (currServiceManager.hasService(name))
{
return true;
}
}
catch (Exception e)
{
String msg = "Unable to invoke fallback service manager '" + serviceManagerComponentName + "'";
this.getLogger().error(msg, e);
throw new RuntimeException(msg);
}
}
}
return false;
}
/**
* @param string The location of the component configuration file
*/
private void setComponentConfigurationLocation(String string)
{
this.componentConfigurationLocation = string;
}
/**
* @param string The location of the component role file
*/
private void setComponentRolesLocation(String string)
{
this.componentRolesLocation = string;
}
/**
* @param string The location of the parameters file
*/
private void setParametersLocation(String string)
{
this.parametersLocation = string;
}
/**
* @return The logger of the service containe
*/
private Logger getLogger()
{
return this.logger;
}
/**
* @return Returns the serviceMap.
*/
private HashMap getServiceMap()
{
return this.serviceMap;
}
/**
* Incarnation of a list of services.
*
* @param serviceList the list of available services
* @throws Exception the incarnation of a service failed
*/
private void incarnateAll(List serviceList)
throws Exception
{
ServiceComponent serviceComponent = null;
// configure all services
for( int i=0; i<serviceList.size(); i++ )
{
serviceComponent = (ServiceComponent) this.getServiceList().get(i);
this.configure( serviceComponent );
}
// incarnate all services
for( int i=0; i<serviceList.size(); i++ )
{
serviceComponent = (ServiceComponent) this.getServiceList().get(i);
this.incarnate( serviceComponent );
}
}
/**
* Configure a single service component. After the invocation
* the service component is ready to be incarnated.
*
* @param serviceComponent The service component to be configured
* @throws Exception the configuration failed
*/
private void configure( ServiceComponent serviceComponent )
throws Exception
{
this.getLogger().debug( "Configuring the service component "
+ serviceComponent.getShorthand()
);
// map the context according to the Avalon component type
YaafiToAvalonContextMapper mapper = new YaafiToAvalonContextMapper(
serviceComponent.getName(),
this.getClassLoader()
);
RoleEntry roleEntry = serviceComponent.getRoleEntry();
String componentFlavour = roleEntry.getComponentFlavour();
DefaultContext serviceComponentContext = mapper.mapTo(
this.getContext(),
componentFlavour
);
// create the remaining Avalon artifacts for the service component
Logger serviceComponentLogger = this.getLogger().getChildLogger(
roleEntry.getLogCategory()
);
Configuration serviceComponentConfiguraton = this.getServiceConfiguration().getChild(
roleEntry.getShorthand()
);
Parameters serviceComponentParameters = this.getParameters();
// configure the service component with all the artifacts
serviceComponent.setLogger(serviceComponentLogger);
serviceComponent.setServiceManager(this);
serviceComponent.setContext(serviceComponentContext);
serviceComponent.setConfiguration(serviceComponentConfiguraton);
serviceComponent.setParameters(serviceComponentParameters);
// load the implementation class of the service
serviceComponent.loadImplemtationClass(
this.getClassLoader()
);
}
/**
* Incarnation of a configured service component. After the
* incarnation the service component is operational.
*
* @param serviceComponent The service component to incarnate
* @exception Exception incarnating the service component failed
*/
private void incarnate( ServiceComponent serviceComponent )
throws Exception
{
this.getLogger().debug( "Incarnating the service "
+ serviceComponent.getShorthand()
);
serviceComponent.incarnate();
}
/**
* Decommision a ist of services.
*
* @param serviceList the list of services to decommision
*/
private void decommisionAll(List serviceList)
{
ServiceComponent serviceComponent = null;
for( int i=serviceList.size()-1; i>=0; i-- )
{
serviceComponent = (ServiceComponent) serviceList.get(i);
this.decommision( serviceComponent );
}
}
/**
* Decommision of a single service component. Decommision consists of running the
* whole Avalon decommision lifecycle process for a service component. After
* decommision the service is not operational any longer. During decommisioning
* we ignore any exceptions since it is quite common that something goes wrong.
*
* @param serviceComponent The service component to decommision
*/
private void decommision( ServiceComponent serviceComponent )
{
this.getLogger().debug( "Decommision the service " + serviceComponent.getShorthand() );
try
{
serviceComponent.decommision();
}
catch (Throwable e)
{
String msg = "Decommisioning the following service failed : " + serviceComponent.getName();
this.getLogger().error( msg, e );
}
}
/**
* Disposing a ist of services
*
* @param serviceList the list of services to dispose
*/
private void disposeAll(List serviceList)
{
ServiceComponent serviceComponent = null;
for( int i=serviceList.size()-1; i>=0; i-- )
{
serviceComponent = (ServiceComponent) serviceList.get(i);
this.dispose( serviceComponent );
}
}
/**
* Disposing of a single service component.
* @param serviceComponent The service component to decommision
*/
private void dispose( ServiceComponent serviceComponent )
{
this.getLogger().debug( "Disposing the service " + serviceComponent.getShorthand() );
try
{
serviceComponent.dispose();
}
catch (Throwable e)
{
String msg = "Disposing the following service failed : " + serviceComponent.getName();
this.getLogger().error( msg, e );
}
}
/**
* @return The list of currently know services
*/
private List getServiceList()
{
return this.serviceList;
}
/**
* @param list The list of known services
*/
private void setServiceList(List list)
{
this.serviceList = list;
}
/**
* @return The service configuration
*/
private Configuration getServiceConfiguration()
{
return this.serviceConfiguration;
}
/**
* Factory method for creating services. The service
* instances are not initialized at this point.
*
* @param roleConfiguration the role configuration file
* @param logger the logger
* @return the list of service components
* @throws ConfigurationException creating the service instance failed
*/
private List createServiceComponents(Configuration roleConfiguration, Logger logger )
throws ConfigurationException
{
Validate.notNull(roleConfiguration,"roleConfiguration");
Validate.notNull(logger,"logger");
ArrayList result = new ArrayList();
ServiceComponent serviceComponent = null;
// create an appropriate instance of role configuration parser
RoleConfigurationParser roleConfigurationParser = this.createRoleConfigurationParser();
// extract the role entries
RoleEntry[] roleEntryList = roleConfigurationParser.parse(roleConfiguration);
// get the default interceptors defined for the container
ArrayList defaultInterceptorList = this.getDefaultInterceptorServiceList();
// create the service components based on the role entries
for ( int i=0; i<roleEntryList.length; i++ )
{
try
{
// add the default interceptors to all role entries
RoleEntry roleEntry = roleEntryList[i];
if( this.hasDynamicProxies() )
{
roleEntry.addInterceptors(defaultInterceptorList);
}
else
{
roleEntry.setHasDynamicProxy(false);
}
serviceComponent = new AvalonServiceComponentImpl(
roleEntry,
this.getLogger(),
logger
);
result.add( serviceComponent );
}
catch( Throwable t )
{
String serviceComponentName = ( serviceComponent != null ? serviceComponent.getName() : "unknown" );
String msg = "Failed to load the service " + serviceComponentName;
this.getLogger().error( msg, t );
throw new ConfigurationException( msg, t );
}
}
return result;
}
/**
* Load a configuration file either from a file or using the class loader.
* @param location the location of the file
* @param isEncrypted is the configuration encryped
* @return The loaded configuration
* @throws Exception Something went wrong
*/
private Configuration loadConfiguration( String location, String isEncrypted )
throws Exception
{
Configuration result = null;
InputStreamLocator locator = this.createInputStreamLocator();
InputStream is = locator.locate( location );
DefaultConfigurationBuilder builder = new DefaultConfigurationBuilder();
if( is != null )
{
try
{
is = this.getDecryptingInputStream( is, isEncrypted );
result = builder.build( is );
is.close();
is = null;
}
catch ( Exception e )
{
String msg = "Unable to parse the following file : " + location;
this.getLogger().error( msg , e );
throw e;
}
}
return result;
}
/**
* Load a configuration property file either from a file or using the class loader.
*
* @return The loaded proeperty file
* @throws ConfigurationException Something went wrong
*/
private Properties loadComponentConfigurationProperties()
throws ConfigurationException
{
Properties result = new Properties();
ComponentConfigurationPropertiesResolver resolver = null;
String className = this.componentConfigurationPropertiesResolverConfig.getChild("resolver").getValue(
ComponentConfigurationPropertiesResolverImpl.class.getName()
);
try
{
Class resolverClass = this.getClassLoader().loadClass( className );
resolver = (ComponentConfigurationPropertiesResolver) resolverClass.newInstance();
ContainerUtil.enableLogging(resolver, this.getLogger());
ContainerUtil.contextualize(resolver, this.getContext());
ContainerUtil.configure(resolver, this.componentConfigurationPropertiesResolverConfig);
result = resolver.resolve(null);
this.getLogger().debug("Using the following componentConfigurationProperties: " + result);
}
catch (Exception e)
{
String msg = "Resolving componentConfigurationProperties failed using the following class : " + className;
this.getLogger().error(msg, e);
throw new ConfigurationException(msg, e);
}
return result;
}
/**
* Load the parameters
* @param location The location as a file
* @param isEncrypted is the file encrypted
* @return The loaded configuration
* @throws Exception Something went wrong
*/
private Parameters loadParameters( String location, String isEncrypted )
throws Exception
{
InputStreamLocator locator = this.createInputStreamLocator();
InputStream is = locator.locate( location );
Parameters result = new Parameters();
if( is != null )
{
is = this.getDecryptingInputStream( is, isEncrypted );
Properties props = new Properties();
props.load( is );
is.close();
is = null;
result = Parameters.fromProperties( props );
}
return result;
}
/**
* Creates a locator to find a resource either in the file system or in
* the classpath.
*
* @return the locator
*/
private InputStreamLocator createInputStreamLocator()
{
return new InputStreamLocator( this.getApplicationRootDir(), this.getLogger() );
}
/**
* Set the application directory of the container.
*
* @param dir The applicationRootDir to set.
*/
private void setApplicationRootDir(File dir)
{
this.getLogger().debug( "Setting applicationRootDir to " + dir.getAbsolutePath() );
Validate.notNull(dir,"applicationRootDir is <null>");
Validate.isTrue(dir.exists(),"applicationRootDir does not exist");
this.applicationRootDir = dir;
}
/**
* @return Returns the applicationRootDir.
*/
private File getApplicationRootDir()
{
return this.applicationRootDir;
}
/**
* @return Returns the serviceManager of the parent container
*/
private ServiceManager getParentServiceManager()
{
return this.parentServiceManager;
}
/**
* @return is a parent ServiceManager available
*/
private boolean hasParentServiceManager()
{
return (this.getParentServiceManager() != null);
}
/**
* Set the temporary directory of the container.
*
* @param dir The tempRootDir to set.
*/
private void setTempRootDir(File dir)
{
this.getLogger().debug( "Setting tempRootDir to " + dir.getAbsolutePath() );
Validate.notNull(dir,"tempRootDir is <null>");
Validate.isTrue(dir.exists(),"tempRootDir does not exist");
Validate.isTrue(dir.canWrite(),"tempRootDir is not writeable");
this.tempRootDir = dir;
}
/**
* @return Returns the tempRootDir.
*/
private File getTempRootDir()
{
return tempRootDir;
}
/**
* @return Returns the isComponentConfigurationEncrypted.
*/
private String isComponentConfigurationEncrypted()
{
return isComponentConfigurationEncrypted;
}
/**
* @param isComponentConfigurationEncrypted The isComponentConfigurationEncrypted to set.
*/
private void setComponentConfigurationEncrypted(
String isComponentConfigurationEncrypted)
{
this.isComponentConfigurationEncrypted = isComponentConfigurationEncrypted;
}
/**
* @return Returns the isComponentRolesEncrypted.
*/
private String isComponentRolesEncrypted()
{
return isComponentRolesEncrypted;
}
/**
* @param isComponentRolesEncrypted The isComponentRolesEncrypted to set.
*/
private void setComponentRolesEncrypted(String isComponentRolesEncrypted)
{
this.isComponentRolesEncrypted = isComponentRolesEncrypted;
}
/**
* @return Returns the isParametersEncrypted.
*/
private String isParametersEncrypted()
{
return isParametersEncrypted;
}
/**
* @param isParametersEncrypted The isParametersEncrypted to set.
*/
private void setParametersEncrypted(String isParametersEncrypted)
{
this.isParametersEncrypted = isParametersEncrypted;
}
/**
* Create a decrypting input stream using the default password.
*
* @param is the input stream to be decrypted
* @param isEncrypted the encryption mode (true|false|auto)
* @return an decrypting input stream
* @throws Exception reading the input stream failed
*/
private InputStream getDecryptingInputStream( InputStream is, String isEncrypted )
throws Exception
{
return CryptoStreamFactory.getDecryptingInputStream(is, isEncrypted);
}
/**
* @return Returns the containerFlavour.
*/
private String getContainerFlavour()
{
return containerFlavour;
}
/**
* @param containerFlavour The containerFlavour to set.
*/
private void setContainerFlavour(String containerFlavour)
{
this.containerFlavour = containerFlavour;
}
/**
* @return Returns the componentRolesFlavour.
*/
private String getComponentRolesFlavour()
{
return componentRolesFlavour;
}
/**
* @param componentRolesFlavour The componentRolesFlavour to set.
*/
private void setComponentRolesFlavour(String componentRolesFlavour)
{
this.componentRolesFlavour = componentRolesFlavour;
}
/**
* @return Returns the context.
*/
private Context getContext()
{
return context;
}
/**
* @return Returns the hasDynamicProxies.
*/
private boolean hasDynamicProxies()
{
return this.hasDynamicProxies;
}
/**
* @return Returns the defaultInterceptorServiceList.
*/
private ArrayList getDefaultInterceptorServiceList()
{
return defaultInterceptorServiceList;
}
/**
* @return the containers class loader
*/
private ClassLoader getClassLoader()
{
return this.getClass().getClassLoader();
}
/**
* Wait for the time configured as 'reconfigurationDelay' before
* reconfiguring the container or services.
*/
private void waitForReconfiguration()
{
try
{
Thread.sleep(this.reconfigurationDelay);
}
catch(InterruptedException e)
{
// nothing to do
}
}
}