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From mcconn...@apache.org
Subject cvs commit: jakarta-avalon-excalibur/assembly/src/java/org/apache/excalibur/assembly/service DefaultServiceManager.java ServiceException.java ServiceManager.java ServiceRuntimeException.java UnknownServiceException.java package.html
Date Tue, 19 Nov 2002 03:14:09 GMT
mcconnell    2002/11/18 19:14:09

  Added:       assembly/src/java/org/apache/excalibur/assembly/service
                        DefaultServiceManager.java ServiceException.java
                        ServiceManager.java ServiceRuntimeException.java
                        UnknownServiceException.java package.html
  Log:
  Addition of a servivce manager as a seperated facilitity.  This is part of the
  overall type/service/profile/applicance refactoring.
  
  Revision  Changes    Path
  1.1                  jakarta-avalon-excalibur/assembly/src/java/org/apache/excalibur/assembly/service/DefaultServiceManager.java
  
  Index: DefaultServiceManager.java
  ===================================================================
  /* ==================================================================== 
   * The Apache Software License, Version 1.1 
   * 
   * Copyright (c) 2002 The Apache Software Foundation. All rights 
   * reserved. 
   * 
   * Redistribution and use in source and binary forms, with or without 
   * modification, are permitted provided that the following conditions 
   * are met: 
   * 
   * 1. Redistributions of source code must retain the above copyright 
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   *    if any, must include the following acknowledgment:
   *    "This product includes software developed by the
   *    Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software 
   *    itself, if and wherever such third-party acknowledgments  
   *    normally appear.
   *
   * 4. The names "Jakarta", "Avalon", and "Apache Software Foundation" 
   *    must not be used to endorse or promote products derived from this
   *    software without prior written permission. For written 
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache",
   *    nor may "Apache" appear in their name, without prior written
   *    permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation. For more
   * information on the Apache Software Foundation, please see 
   * <http://www.apache.org/>.
   */ 
  
  package org.apache.excalibur.assembly.service;
  
  import java.util.Map;
  import java.util.Hashtable;
  import java.util.Iterator;
  import java.util.ArrayList;
  
  import org.apache.avalon.framework.Version;
  import org.apache.avalon.framework.logger.Logger;
  import org.apache.avalon.framework.logger.AbstractLogEnabled;
  import org.apache.avalon.framework.configuration.Configuration;
  import org.apache.excalibur.meta.info.Service;
  import org.apache.excalibur.meta.info.builder.ServiceBuilder;
  import org.apache.excalibur.meta.info.builder.ServiceCreator;
  import org.apache.excalibur.meta.info.ReferenceDescriptor;
  import org.apache.excalibur.meta.info.DependencyDescriptor;
  import org.apache.excalibur.meta.info.ServiceDescriptor;
  import org.apache.excalibur.meta.info.StageDescriptor;
  import org.apache.excalibur.meta.verifier.ComponentVerifier;
  
  /**
   * A service manager implemetation provides support for the creation, 
   * storage and retrival of service defintions.
   *
   * @author <a href="mailto:mcconnell@apache.org">Stephen McConnell</a>
   * @version $Revision: 1.1 $ $Date: 2002/11/19 03:14:09 $
   */
  public class DefaultServiceManager extends AbstractLogEnabled implements ServiceManager
  {
      //==============================================================
      // state
      //==============================================================
  
     /**
      * The classloader supplied to the manager.
      */
      private final ClassLoader m_classloader;
  
     /**
      * The parent service manager (may be null)
      */
      private final ServiceManager m_parent;
  
     /**
      * The service builder.
      */
      private final ServiceBuilder m_builder = new ServiceBuilder();
  
      /**
       * Table of component types keyed by implementation classname.
       */
      private Hashtable m_services = new Hashtable();
  
      //==============================================================
      // constructor
      //==============================================================
  
     /**
      * Creation of a new {@link ServiceManager} based on a supplied parent 
      * and classloader.
      * @param parent the parent service manager (may be null)
      * @param classloader the classloader
      */
      public DefaultServiceManager( ServiceManager parent, ClassLoader classloader )
      {
          if( classloader == null )
          {
              throw new NullPointerException("classloader");
          }
          m_parent = parent;
          m_classloader = classloader;
      }
  
      //==============================================================
      // LogEnabled
      //==============================================================
  
      /**
       * Setup logging for all subcomponents
       * @param logger the logging channel
       */
      public void enableLogging( final Logger logger )
      {
          super.enableLogging( logger );
          m_builder.enableLogging( logger.getChildLogger( "builder" ) );
      }
  
      //==============================================================
      // ServiceManager
      //==============================================================
  
      /**
       * Locate a {@link Service} instances associated with the 
       * supplied classname and version. If a formal service defintion is 
       * unknown the method returns a default service defintion based on 
       * the supplied classname and version.
       *
       * @return the service matching the supplied implementation classname.
       * @exception UnknownServiceException if a matching service cannot be found
       */
      public Service getService( String classname, Version version ) throws UnknownServiceException
      {
          Map map = getServiceMap( classname, false );
          if( map != null )
          {
              Service service = (Service) map.get( version );
              if( service != null )
              {
                  return service;
              }
          }
  
          //
          // check the parent first
          //
  
          if( m_parent != null )
          {
              return m_parent.getService( classname, version );
          }
          else
          {
              final String error = "Unknown service defintion: " + classname + "/" + version;
              throw new UnknownServiceException( error );
          }
      }
  
      //==============================================================
      // implemetation
      //==============================================================
  
      /**
       * Add a service to the manager.
       *
       * @param path the service class name
       * @return the set of service defintions
       */
      public void addService( Service service ) throws ServiceException
      {
          //
          // make sure we are dealing with a service that is verified
          //
  
          verifyService( service );
  
          //
          // make sure that there is not already a local defintion for 
          // this service
          //
  
          String classname = service.getClassname();
          Version version = service.getVersion();
          Map map = getServiceMap( classname, false );
          if( map != null )
          {
              if( map.get( version ) != null )
              {
                  final String error = 
                    "Duplicate service defintion: " + service;
                  throw new ServiceException( error );
              }            
          }
          else
          {
              map = getServiceMap( classname, true );
          }
   
          map.put( version, service );
      }
  
      /**
       * Install the set of services associated with the supplied path. 
       *
       * @param path the service class name
       * @return the set of service defintions
       */
      public Service installService( String path ) throws ServiceException
      {
          final String classname = path.replace( '/', '.' );
  
          Service service;
          try
          {
              service = m_builder.build( classname, m_classloader );
          }
          catch( Throwable e )
          {
              final String error = 
                 "Could not register a service relative to the path: " 
                 + path + " due to a service build error.";
              throw new ServiceException( error, e );
          }
  
          addService( service );
          return service;
      }
  
  
     /**
      * Internal utility that returns a map of services keyed by version.  The 
      * map is resolved from the m_services list based on the classname key.
      * @param classname the classname key
      * @param create if TRUE create a new map if no map found
      * @return the service map for the class
      */
      private Map getServiceMap( String classname, boolean create )
      {
          Map map = (Map) m_services.get( classname );
          if(( map == null ) && create )
          {
              map = new Hashtable();
              m_services.put( classname, map );
          }
          return map;
      }
  
  
     /**
      * Verify that a class exists within the classloader representing the 
      * service type.
      * @param service the service to verify
      * @exception ServiceException if a verification error occurs
      */
      private void verifyService( Service service ) throws ServiceException
      {
          Class clazz;
          try
          {
              clazz = m_classloader.loadClass( service.getClassname() );
          }
          catch( Throwable e )
          {
              final String error = "Unresolvable service class.";
              throw new ServiceException( error, e );
          }
      }
  }
  
  
  
  1.1                  jakarta-avalon-excalibur/assembly/src/java/org/apache/excalibur/assembly/service/ServiceException.java
  
  Index: ServiceException.java
  ===================================================================
  /* ==================================================================== 
   * The Apache Software License, Version 1.1 
   * 
   * Copyright (c) 2002 The Apache Software Foundation. All rights 
   * reserved. 
   * 
   * Redistribution and use in source and binary forms, with or without 
   * modification, are permitted provided that the following conditions 
   * are met: 
   * 
   * 1. Redistributions of source code must retain the above copyright 
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   *    if any, must include the following acknowledgment:
   *    "This product includes software developed by the
   *    Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software 
   *    itself, if and wherever such third-party acknowledgments  
   *    normally appear.
   *
   * 4. The names "Jakarta", "Avalon", and "Apache Software Foundation" 
   *    must not be used to endorse or promote products derived from this
   *    software without prior written permission. For written 
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache",
   *    nor may "Apache" appear in their name, without prior written
   *    permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation. For more
   * information on the Apache Software Foundation, please see 
   * <http://www.apache.org/>.
   */ 
  
  package org.apache.excalibur.assembly.service;
  
  import org.apache.avalon.framework.CascadingException;
  
  /**
   * Exception to indicate that there was a service related error.
   *
   * @author <a href="mailto:mcconnell@apache.org">Stephen McConnell</a>
   * @version $Revision: 1.1 $ $Date: 2002/11/19 03:14:09 $
   */
  public class ServiceException
      extends CascadingException
  {
  
      /**
       * Construct a new <code>ServiceException</code> instance.
       *
       * @param message The detail message for this exception.
       */
      public ServiceException( final String message )
      {
          this( message, null );
      }
  
      /**
       * Construct a new <code>ServiceException</code> instance.
       *
       * @param message The detail message for this exception.
       * @param throwable the root cause of the exception
       */
      public ServiceException( final String message, final Throwable throwable )
      {
          super( message, throwable );
      }
  }
  
  
  
  
  1.1                  jakarta-avalon-excalibur/assembly/src/java/org/apache/excalibur/assembly/service/ServiceManager.java
  
  Index: ServiceManager.java
  ===================================================================
  /* ==================================================================== 
   * The Apache Software License, Version 1.1 
   * 
   * Copyright (c) 2002 The Apache Software Foundation. All rights 
   * reserved. 
   * 
   * Redistribution and use in source and binary forms, with or without 
   * modification, are permitted provided that the following conditions 
   * are met: 
   * 
   * 1. Redistributions of source code must retain the above copyright 
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   *    if any, must include the following acknowledgment:
   *    "This product includes software developed by the
   *    Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software 
   *    itself, if and wherever such third-party acknowledgments  
   *    normally appear.
   *
   * 4. The names "Jakarta", "Avalon", and "Apache Software Foundation" 
   *    must not be used to endorse or promote products derived from this
   *    software without prior written permission. For written 
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache",
   *    nor may "Apache" appear in their name, without prior written
   *    permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation. For more
   * information on the Apache Software Foundation, please see 
   * <http://www.apache.org/>.
   */ 
  
  package org.apache.excalibur.assembly.service;
  
  import org.apache.avalon.framework.Version;
  
  import org.apache.excalibur.meta.info.Service;
  
  /**
   * A type manager implemetation provides support for the creation, 
   * storage and retrival of service defintions.
   *
   * @author <a href="mailto:mcconnell@apache.org">Stephen McConnell</a>
   * @version $Revision: 1.1 $ $Date: 2002/11/19 03:14:09 $
   */
  public interface ServiceManager
  {
  
      /**
       * Locate a {@link Service} instances associated with the 
       * supplied classname and version. 
       *
       * @return the service matching the supplied classname
       *   and version
       * @exception UnknownServiceException if a matching service cannot be found
       */
      public Service getService( String classname, Version version ) throws UnknownServiceException;
  
  }
  
  
  
  1.1                  jakarta-avalon-excalibur/assembly/src/java/org/apache/excalibur/assembly/service/ServiceRuntimeException.java
  
  Index: ServiceRuntimeException.java
  ===================================================================
  /* ==================================================================== 
   * The Apache Software License, Version 1.1 
   * 
   * Copyright (c) 2002 The Apache Software Foundation. All rights 
   * reserved. 
   * 
   * Redistribution and use in source and binary forms, with or without 
   * modification, are permitted provided that the following conditions 
   * are met: 
   * 
   * 1. Redistributions of source code must retain the above copyright 
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   *    if any, must include the following acknowledgment:
   *    "This product includes software developed by the
   *    Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software 
   *    itself, if and wherever such third-party acknowledgments  
   *    normally appear.
   *
   * 4. The names "Jakarta", "Avalon", and "Apache Software Foundation" 
   *    must not be used to endorse or promote products derived from this
   *    software without prior written permission. For written 
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache",
   *    nor may "Apache" appear in their name, without prior written
   *    permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation. For more
   * information on the Apache Software Foundation, please see 
   * <http://www.apache.org/>.
   */ 
  
  package org.apache.excalibur.assembly.service;
  
  import org.apache.avalon.framework.CascadingRuntimeException;
  
  /**
   * Exception to indicate that there was a seervice related runtime error.
   *
   * @author <a href="mailto:mcconnell@apache.org">Stephen McConnell</a>
   * @version $Revision: 1.1 $ $Date: 2002/11/19 03:14:09 $
   */
  public final class ServiceRuntimeException
      extends CascadingRuntimeException
  {
  
      /**
       * Construct a new <code>ServiceRuntimeException</code> instance.
       *
       * @param message The detail message for this exception.
       */
      public ServiceRuntimeException( final String message )
      {
          this( message, null );
      }
  
      /**
       * Construct a new <code>ServiceRuntimeException</code> instance.
       *
       * @param message The detail message for this exception.
       * @param throwable the root cause of the exception
       */
      public ServiceRuntimeException( final String message, final Throwable throwable )
      {
          super( message, throwable );
      }
  }
  
  
  
  
  1.1                  jakarta-avalon-excalibur/assembly/src/java/org/apache/excalibur/assembly/service/UnknownServiceException.java
  
  Index: UnknownServiceException.java
  ===================================================================
  /* ==================================================================== 
   * The Apache Software License, Version 1.1 
   * 
   * Copyright (c) 2002 The Apache Software Foundation. All rights 
   * reserved. 
   * 
   * Redistribution and use in source and binary forms, with or without 
   * modification, are permitted provided that the following conditions 
   * are met: 
   * 
   * 1. Redistributions of source code must retain the above copyright 
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   *    if any, must include the following acknowledgment:
   *    "This product includes software developed by the
   *    Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software 
   *    itself, if and wherever such third-party acknowledgments  
   *    normally appear.
   *
   * 4. The names "Jakarta", "Avalon", and "Apache Software Foundation" 
   *    must not be used to endorse or promote products derived from this
   *    software without prior written permission. For written 
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache",
   *    nor may "Apache" appear in their name, without prior written
   *    permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation. For more
   * information on the Apache Software Foundation, please see 
   * <http://www.apache.org/>.
   */ 
  
  package org.apache.excalibur.assembly.service;
  
  /**
   * Exception to indicate that a service defintioon is unknown within 
   * the scope of a service manager.
   *
   * @author <a href="mailto:mcconnell@apache.org">Stephen McConnell</a>
   * @version $Revision: 1.1 $ $Date: 2002/11/19 03:14:09 $
   */
  public final class UnknownServiceException
      extends ServiceException
  {
  
      /**
       * Construct a new <code>UnknownServiceException</code> instance.
       *
       * @param message The detail message for this exception.
       */
      public UnknownServiceException( final String message )
      {
          this( message, null );
      }
  
      /**
       * Construct a new <code>UnknownServiceException</code> instance.
       *
       * @param message The detail message for this exception.
       * @param throwable the root cause of the exception
       */
      public UnknownServiceException( final String message, final Throwable throwable )
      {
          super( message, throwable );
      }
  }
  
  
  
  
  1.1                  jakarta-avalon-excalibur/assembly/src/java/org/apache/excalibur/assembly/service/package.html
  
  Index: package.html
  ===================================================================
  
  <body>
  <p>
  The <code>type</code> package contains classes and interfaces for the {@link
org.apache.excalibur.assembly.type.TypeManager} and related default implementations supporting
the management of a repository of component types.
  </p>
  </body>
  
  
  

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