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package com.sun.grizzly.asyncweb;
import com.sun.enterprise.web.connector.grizzly.ProcessorTask;
import com.sun.enterprise.web.connector.grizzly.ReadTask;
import com.sun.enterprise.web.connector.grizzly.SelectorThread;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.SelectionKey;
import java.util.Iterator;
import java.util.Set;
import org.safehaus.asyncweb.container.ServiceContainer;
import org.safehaus.asyncweb.container.basic.HttpServiceHandler;
import org.safehaus.asyncweb.transport.Transport;
import java.util.logging.Level;
import org.safehaus.asyncweb.http.HttpRequest;
import org.safehaus.asyncweb.http.HttpResponse;
import org.safehaus.asyncweb.http.HttpService;
import org.safehaus.asyncweb.transport.nio.HttpIOHandler;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
/**
* AsyncWeb Integration into Grizzly.
*
* @author Dave Irving
* @author Jeanfrancois Arcand
*/
public class AsyncWebSelectorThread extends SelectorThread implements Transport {
/**
* Is Grizzly embedded in GlassFish.
*/
protected static boolean embeddedInGlassFish = false;
// Are we running embedded or not.
static{
try{
embeddedInGlassFish =
(Class.forName("org.apache.coyote.tomcat5.Constants") != null);
} catch(Exception ex){
; //Swallow
}
}
private static final String CONFIG_PROPERTY = "asyncWeb.config";
private static final String SERVICE_CONFIG_PROPERTY = "asyncWeb.config.services";
private static final String DEFAULT_SERVICE_CONFIG = "httpServiceDefinitions";
/**
* The default context for receiving requests.
*/
private final static String SERVICE_NAME = "";
/**
* The <code>BasicServiceContainer</code> which handle non blocking
* request.
*/
private ServiceContainer container;
/**
* The default <code>IoHandler</code>
*/
private HttpIOHandler httpIOHandler;
/**
* SelectorThread implementation.
*/
public AsyncWebSelectorThread() {
super();
algorithmClassName = AsyncWebStreamAlgorithm.class.getName();
}
/**
* Init the <code>AsyncWeb</code> runtime and this
* <code>SelectorThread</code>
*/
public void initEndpoint() throws IOException, InstantiationException {
configureAsyncWebRuntime();
httpIOHandler = new HttpIOHandler();
httpIOHandler.setContainer(container);
super.initEndpoint();
}
/**
* Start the <code>SelectorThread
*/
public void startEndpoint() throws IOException, InstantiationException {
super.startEndpoint();
try{
container.start();
} catch (Exception ex){
logger.log(Level.SEVERE,"AsyncWeb startup exception.", ex);
throw new IOException(ex.getMessage());
}
}
/**
* Stop the <code>SelectorThread</code>
*/
public void stoptEndpoint() throws IOException, InstantiationException {
try{
container.stop();
} catch (Exception ex){
logger.log(Level.SEVERE,"AsyncWeb stop exception.", ex);
throw new IOException(ex.getMessage());
}
super.stopEndpoint();
}
/**
* Creates a new <code>AsyncWebProcessorTask</code> and configure it
* to delegate AsyncWeb requests to its associated <code>HttpIoHandler</code>
*
* @return ProcessorTask an instance of AsyncWebProcessorTask
*/
public ProcessorTask newProcessorTask(boolean initialize){
AsyncWebProcessorTask task = new AsyncWebProcessorTask();
task.setMaxHttpHeaderSize(maxHttpHeaderSize);
task.setBufferSize(requestBufferSize);
task.setSelectorThread(this);
task.setRecycle(recycleTasks);
task.setIoHandler(httpIOHandler);
task.initialize();
if ( keepAlivePipeline.dropConnection() ) {
task.setDropConnection(true);
}
task.setPipeline(processorPipeline);
return task;
}
/**
* Cancel keep-alive connections.
*/
protected void expireIdleKeys(){
if ( keepAliveTimeoutInSeconds <= 0 || !selector.isOpen()) return;
long current = System.currentTimeMillis();
if (current < getNextKeysExpiration()) {
return;
}
setNextKeysExpiration(current + getKaTimeout());
Set<SelectionKey> readyKeys = selector.keys();
if (readyKeys.isEmpty()){
return;
}
Iterator<SelectionKey> iterator = readyKeys.iterator();
SelectionKey key;
while (iterator.hasNext()) {
key = iterator.next();
if ( !key.isValid() ) {
keepAlivePipeline.untrap(key);
continue;
}
// Keep-alive expired
if ( key.attachment() != null ) {
long expire = 0L;
if (key.attachment() instanceof Long){
expire = (Long) key.attachment();
} else {
expire = (Long) ((ReadTask)key.attachment()).getIdleTime();
}
if (current - expire >= getKaTimeout()) {
cancelKey(key);
} else if (expire + getKaTimeout() < getNextKeysExpiration()){
setNextKeysExpiration(expire + getKaTimeout());
}
}
}
}
// ------------------------------------------- AsyncWeb Implementation --//
/**
* Builds an async web container - adding transport and
* services
*
* @return The built container
*/
private void configureAsyncWebRuntime() {
String configDir = null;
if ( embeddedInGlassFish ){
configDir ="file://"
+ System.getProperty("com.sun.aas.instanceRoot")
+ File.separator + "config";
} else if ( rootFolder != null){
try{
configDir ="file://"
+ new File(rootFolder).getCanonicalPath()
+ File.separator + "conf";
} catch (IOException ex){
logger.log(Level.SEVERE,"Config error", ex);
}
} else {
throw new IllegalStateException("rootFolder cannot be null");
}
String[] configs = new String[] { configDir + File.separator
+ "AsyncWeb.xml", configDir
+ File.separator
+ DEFAULT_SERVICE_CONFIG
+ File.separator + "*.xml"};
ApplicationContext ctx = new FileSystemXmlApplicationContext(configs);
container = (ServiceContainer) ctx.getBean("container");
container.addTransport(this);
HttpServiceHandler httpServiceHandler =
(HttpServiceHandler)ctx.getBean("httpServiceHandler");
HttpService rooService = new RootAsyncService();
httpServiceHandler.addHttpService(SERVICE_NAME, rooService);
}
/**
* Set the <code>ServiceContainer</code> used by this
* <code>SelectorThread</code>
*/
public void setServiceContainer(ServiceContainer container) {
this.container = container;
}
// -------------------------------------------------- Default Service ----//
/**
* An example service - just to show that we can indeed respond asynchronously.
* We queue up requests on to a Timer, and respond after a set "latency" period
*
* I.e, this example demonstrates that our replacement for servlets can respond
* when they like and free up the container thread which calls in to them
*
* @author irvingd
*
*/
private static class RootAsyncService implements HttpService {
private byte[] indexFile;
public RootAsyncService(){
String configDir = null;
if ( embeddedInGlassFish ){
configDir = System.getProperty("com.sun.aas.instanceRoot")
+ File.separator + "config" + File.separator
+ DEFAULT_SERVICE_CONFIG
+ File.separator + "index.html";
} else if ( rootFolder != null){
try{
configDir = new File(rootFolder).getCanonicalPath()
+ File.separator + "conf" + File.separator
+ DEFAULT_SERVICE_CONFIG
+ File.separator + "index.html";
} catch (IOException ex){
logger.log(Level.SEVERE,"Config error", ex);
}
} else {
throw new IllegalStateException("rootFolder cannot be null");
}
File file = new File(configDir);
FileChannel fileChannel = null;
FileInputStream stream = null;
try {
stream = new FileInputStream(file);
fileChannel = stream.getChannel();
long size = fileChannel.size();
MappedByteBuffer map
= fileChannel.map(FileChannel.MapMode.READ_ONLY,0,size);
indexFile = new byte[(int)size];
map.get(indexFile);
} catch (IOException ioe) {
logger.log(Level.SEVERE,"RootAsyncService",ioe);
} finally {
if (stream != null) {
try {
stream.close();
} catch (IOException ioe) {
}
}
if (fileChannel != null) {
try {
fileChannel.close();
} catch (IOException ioe) {
}
}
}
}
/**
* Handles a received request.
* We schedule a response to be provided at some later time, and return.
*
* @param request The request to be handled
*/
public void handleRequest(HttpRequest request) {
doRespond(request);
}
public void start() {
// Lifecycle method - probably just use annotations one day
}
public void stop() {
// Lifecycle method - probably just use annotations one day
}
/**
* Actually write and commit a response using the default index.html
*
* @param request The request to respond to
*/
private void doRespond(HttpRequest request) {
HttpResponse response = request.createHttpResponse();
OutputStream out = response.getOutputStream();
try{
out.write(indexFile);
out.flush();
} catch (IOException ex){
logger.log(Level.SEVERE,"RootAsyncService",ex);
} finally{
try {
out.close();
} catch (IOException ex) {}
}
request.commitResponse(response);
}
}
}
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