Package org.apache.geronimo.jetty6

Source Code of org.apache.geronimo.jetty6.JettyFilterHolder$InternalFilterHolder

/**
*  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.geronimo.jetty6;

import java.util.Map;

import org.apache.geronimo.gbean.GBeanInfo;
import org.apache.geronimo.gbean.GBeanInfoBuilder;
import org.apache.geronimo.gbean.GBeanLifecycle;
import org.apache.geronimo.j2ee.j2eeobjectnames.NameFactory;
import org.apache.geronimo.jetty6.handler.LifecycleCommand;
import org.mortbay.jetty.servlet.FilterHolder;

/**
* @version $Rev: 601045 $ $Date: 2007-12-05 03:15:27 +0800 (Wed, 05 Dec 2007) $
*/
public class JettyFilterHolder implements GBeanLifecycle {

    private final FilterHolder filterHolder;

    //todo consider an interface instead of this constructor for endpoint use.
    public JettyFilterHolder() {
        filterHolder = null;
    }

    public JettyFilterHolder(String filterName, String filterClass, Map initParams, JettyServletRegistration jettyServletRegistration) throws Exception {
        filterHolder = new InternalFilterHolder(jettyServletRegistration);
        if (jettyServletRegistration != null) {
            filterHolder.setName(filterName);
            filterHolder.setClassName(filterClass);
            filterHolder.setInitParameters(initParams);
            (jettyServletRegistration.getServletHandler()).addFilter(filterHolder);
        }
    }

    public String getFilterName() {
        return filterHolder.getName();
    }

    public void doStart() throws Exception {
        filterHolder.start();
    }

    public void doStop() throws Exception {
        filterHolder.stop();
    }

    public void doFail() {
        try {
            filterHolder.stop();
        } catch (Exception e) {
            //ignore?
        }
    }

    private static class InternalFilterHolder extends FilterHolder {
        private final JettyServletRegistration servletRegistration;
        private boolean destroyed;

        public InternalFilterHolder(JettyServletRegistration servletRegistration) {
            this.servletRegistration = servletRegistration;
        }


        public synchronized Object newInstance() throws InstantiationException, IllegalAccessException {
            return servletRegistration.newInstance(_className);
        }

        public void destroyInstance(Object o) throws Exception {
            if (!destroyed) {
                super.destroyInstance(o);
                servletRegistration.destroyInstance(o);
                destroyed = true;
            }
        }
       
        public void doStop() {
            LifecycleCommand lifecycleCommand = (new LifecycleCommand() {
                public void lifecycleMethod() throws Exception {
                    internalDoStop();
                }
            });
            try {
                this.servletRegistration.getLifecycleChain().lifecycleCommand(lifecycleCommand);
            } catch (Exception e) {
                //ignore????
            }
        }
       
        public void doStart() throws Exception {
            LifecycleCommand lifecycleCommand = (new LifecycleCommand() {
                public void lifecycleMethod() throws Exception {
                    internalDoStart();
                }
            });
            this.servletRegistration.getLifecycleChain().lifecycleCommand(lifecycleCommand);
        }
       
        private void internalDoStart() throws Exception {
            super.doStart();
        }

        private void internalDoStop() {
            super.doStop();
        }

    }

    public static final GBeanInfo GBEAN_INFO;

    static {
        GBeanInfoBuilder infoBuilder = GBeanInfoBuilder.createStatic(JettyFilterHolder.class, NameFactory.WEB_FILTER);
        infoBuilder.addAttribute("filterName", String.class, true);
        infoBuilder.addAttribute("filterClass", String.class, true);
        infoBuilder.addAttribute("initParams", Map.class, true);

        infoBuilder.addReference("JettyServletRegistration", JettyServletRegistration.class, NameFactory.WEB_MODULE);

        infoBuilder.setConstructor(new String[]{"filterName", "filterClass", "initParams", "JettyServletRegistration"});

        GBEAN_INFO = infoBuilder.getBeanInfo();

    }

    public static GBeanInfo getGBeanInfo() {
        return GBEAN_INFO;
    }

}
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