Glassfish example source code file (SnifferAdapter.java)

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Java - Glassfish tags/keywords

adapter, adapter, containermapper, exception, exception, inject, inject, log, logging, mappingdata, object, object, override, response, runtimeexception, snifferadapter, util

The Glassfish SnifferAdapter.java source code

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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
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 * file and include the License file at packager/legal/LICENSE.txt.
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package com.sun.enterprise.v3.services.impl;

import com.sun.logging.LogDomains;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.annotations.Scoped;
import org.jvnet.hk2.annotations.Inject;
import org.jvnet.hk2.component.PerLookup;
import org.glassfish.api.container.Sniffer;
import org.glassfish.internal.data.ContainerRegistry;
import org.glassfish.internal.data.EngineInfo;
import com.sun.grizzly.tcp.Adapter;
import com.sun.grizzly.tcp.Request;
import com.sun.grizzly.tcp.Response;
import com.sun.grizzly.util.http.mapper.MappingData;
import com.sun.grizzly.util.buf.MessageBytes;
import com.sun.enterprise.v3.server.ContainerStarter;
import com.sun.enterprise.module.ModulesRegistry;
import com.sun.enterprise.module.Module;

import java.util.Collection;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * These adapters are temporarily registered to the mapper to handle static
 * pages request that a container would like to process rather than serving
 * them statically unchanged. This is useful for things like .jsp or .php
 * files saved in the context root of the application server.
 *
 * @author Jerome Dochez
 * @author Jeanfrancois Arcand
 */
@Service
@Scoped(PerLookup.class)
public class SnifferAdapter implements Adapter {

    @Inject
    ContainerRegistry containerRegistry;

    @Inject
    ContainerStarter containerStarter;

    @Inject
    ModulesRegistry modulesRegistry;

    private Logger logger = LogDomains.getLogger(SnifferAdapter.class, LogDomains.CORE_LOGGER);
    
    private Sniffer sniffer;
    private ContainerMapper mapper;
    private Adapter adapter = null;

    public void initialize(Sniffer sniffer, ContainerMapper mapper) {
        this.sniffer = sniffer;
        this.mapper = mapper;
    }

    // I could synchronize this method since I only start one container and do it
    // synchronously but that seems like an overkill and I would still need to handle
    // pending requests.
    @Override
    public void service(Request req, Response resp) throws Exception {

        if (adapter != null) {
            // this is not supposed to happen, however due to multiple requests coming in, I would
            // not be surprised...
            adapter.service(req, resp);
            return;
        }

        // bingo, we found a sniffer that wants to handle this requested
        // page, let's get to the container or start it.
        // start all the containers associated with sniffers.

        // need to synchronize on the registry to not end up starting the same container from
        // different threads.
        synchronized (containerRegistry) {
            if (adapter != null) {
                // I got started in the meantime
                adapter.service(req, resp);
                return;
            }

            if (containerRegistry.getContainer(sniffer.getContainersNames()[0]) != null) {
                if (logger.isLoggable(Level.FINE)) {
                    logger.fine("Container is claimed to be started...");
                }
                containerRegistry.getContainer(sniffer.getContainersNames()[0]).getContainer();
            } else {
                final long startTime = System.currentTimeMillis();
                logger.log(Level.INFO, "core.snifferadapter.starting.container", sniffer.getModuleType());
                Module snifferModule = modulesRegistry.find(sniffer.getClass());
                try {
                    Collection<EngineInfo> containersInfo = containerStarter.startContainer(sniffer, snifferModule);
                    if (containersInfo != null && containersInfo.size() > 0) {
                        // force the start on each container
                        for (EngineInfo info : containersInfo) {
                            if (logger.isLoggable(Level.FINE)) {
                                logger.log(Level.FINE, "Got container, deployer is {0}", info.getDeployer());
                            }
                            info.getContainer();
                            logger.log(Level.INFO, "core.snifferadapter.container.started",
                                    new Object[]{sniffer.getModuleType(), System.currentTimeMillis() - startTime});
                        }
                    } else {
                        logger.severe("core.snifferadapter.no.container.available");
                    }
                } catch (Exception e) {
                    logger.log(Level.SEVERE,
                               "core.snifferadapter.exception.starting.container",
                               new Object[] { sniffer.getContainersNames()[0] });
                    logger.log(Level.SEVERE, e.toString(), e);
                }
            }

            // at this point the post construct should have been called.
            // seems like there is some possibility that the container is not synchronously started
            // preventing the calls below to succeed...
            MessageBytes decodedURI = req.decodedURI();
            try {
                // Clear the previous mapped information.
                MappingData mappingData =
                        (MappingData) req.getNote(ContainerMapper.MAPPING_DATA);
                mappingData.recycle();

                adapter = mapper.mapUriWithSemicolon(req, decodedURI, 0, null);
                // If a SnifferAdapter doesn't do it's job, avoid recursion 
                // and throw a Runtime exception.
                if (adapter.equals(this)) {
                    adapter = null;
                    throw new RuntimeException("SnifferAdapter cannot map themself.");
                }
            } catch (Exception e) {
                logger.log(Level.SEVERE, "core.snifferadapter.exception.mapping.request", e);
                throw e;
            }

            // pass on,,,
            if (adapter != null) {
                adapter.service(req, resp);
            } else {
                throw new RuntimeException("No Adapter found.");
            }
        }
    }

    @Override
    public void afterService(Request request, Response response) throws Exception {
        if (adapter != null) {
            adapter.afterService(request, response);
        }
    }
}