+++ /dev/null
-package org.ibex.xml;
-import org.ibex.js.*;
-import org.ibex.util.*;
-import org.ibex.io.*;
-import java.io.*;
-import java.net.*;
-import java.util.*;
-import javax.servlet.*;
-import javax.servlet.http.*;
-import com.thoughtworks.xstream.*;
-import org.prevayler.*;
-import org.prevayler.implementation.snapshot.*;
-
-
-public class Servlet extends HttpServlet {
-
- private ServletResolver resolver = new ServletResolver();
- private class ServletResolver implements XML.Node.Stream.Resolver {
- public XML.Node.Stream.Functor resolve(String uri) {
- if (uri.indexOf(':') == -1) throw new RuntimeException("uri does not contain an method: " + uri);
- String method = uri.substring(0, uri.indexOf(':'));
- String rest = uri.substring(uri.indexOf(':'))+1;
- //case "xtree": return XTree.tag(rest);
- //#switch(method)
- case "webinf": return new Template(cx.getRealPath(rest));
- case "java": try { return (XML.Node.Stream.Functor)Class.forName(rest).newInstance(); }
- catch (Exception e) { throw new RuntimeException(e); }
- //#end
- throw new RuntimeException("unknown method " + method);
- }
- }
-
- public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
- JSScope scope = new ServletScope(request, response);
- String path = cx.getRealPath(((HttpServletRequest)request).getServletPath());
- Reader xmlreader = new InputStreamReader(new FileInputStream(path));
- XML.Node.Stream s = new JSRewriter(XML.Node.Stream.in(xmlreader), scope);
- s.out(response.getWriter());
- }
-
- public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException { doGet(request, response); }
-
- public class ServletScope extends JSScope {
- HttpServletRequest request;
- HttpServletResponse response;
- public ServletScope(ServletRequest request, ServletResponse response) {
- super(null);
- this.request = (HttpServletRequest)request;
- this.response = (HttpServletResponse)response;
- }
- private JS params = new JS() {
- public Object get(Object key) { return request.getParameter(JS.toString(key)); }
- public Enumeration keys() { return request.getParameterNames(); }
- };
- private JS cookies = new JS() {
- /*
- public Object get(Object key) { return request.getCookie(JS.toString(key)); }
- public Enumeration keys() { return request.getCookieNames(); }
- */
- };
- private JS sessionAttributes = new JS() {
- public Object get(Object key) { return request.getSession(true).getAttribute(JS.toString(key)); }
- public void put(Object key, Object val) {
- if (val == null) request.getSession(true).removeAttribute(JS.toString(key));
- else request.setAttribute(JS.toString(key), val); }
- public Enumeration keys() { return request.getSession(true).getAttributeNames(); }
- };
- private JS requestHeader = new JS() {
- public Object get(Object key) { return request.getHeader(JS.toString(key)); }
- public Enumeration keys() { return request.getHeaderNames(); }
- };
- private JS responseHeader = new JS() {
- public void put(Object key, Object val) { response.setHeader(JS.toString(key), JS.toString(val)); }
- };
-
-
- /** lets us put multi-level get/put/call keys all in the same method */
- private class Sub extends JS {
- Object key;
- Sub(Object key) { this.key = key; }
- public void put(Object key, Object val) throws JSExn {
- ServletScope.this.put(JS.toString(this.key) + "." + JS.toString(key), val); }
- public Object get(Object key) throws JSExn {
- return ServletScope.this.get(JS.toString(this.key) + "." + JS.toString(key)); }
- public Object call(Object a0, Object a1, Object a2, Object[] rest, int nargs) throws JSExn {
- return ServletScope.this.callMethod(this.key, a0, a1, a2, rest, nargs);
- }
- public Object callMethod(Object method, Object a0, Object a1, Object a2, Object[] rest, int nargs) throws JSExn {
- return ServletScope.this.callMethod(JS.toString(this.key) + "."
- + JS.toString(method), a0, a1, a2, rest, nargs);
- }
- }
- private Sub getSub(String key) { return new Sub(key); }
-
- public Object callMethod(Object method, final Object a, final Object b, Object c, Object[] rest, int nargs) throws JSExn {
- //#switch(method)
- case "prevalent.query":
- try {
- return prevayler.execute(new JSQuery(JS.cloneWithNewParentScope((JS)a, null)));
- } catch (Exception e) {
- e.printStackTrace();
- throw new RuntimeException(e); }
-
- case "prevalent.execute":
- try {
- prevayler.execute(new JSTransaction(JS.cloneWithNewParentScope((JS)a, null)));
- } catch (Exception e) {
- e.printStackTrace();
- throw new RuntimeException(e); }
-
- case "session.invalidate": request.getSession(true).invalidate(); return null;
- //#end
- return null;
- }
- public Object get(Object key) throws JSExn {
- //#switch(key)
- case "body":
- case "arg": return null;
- case "prevalent": return getSub("prevalent");
- case "prevalent.query": return METHOD;
- case "prevalent.execute": return METHOD;
- case "request": return getSub("request");
- case "request.user": return request.getRemoteUser();
- case "request.header": return requestHeader;
- case "request.method": return request.getMethod();
- case "request.remote": return getSub("request.remote");
- case "request.remote.ip": return request.getRemoteAddr();
- case "request.remote.host": return request.getRemoteHost();
- case "request.ssl": return request.isSecure();
- case "request.path": return request.getPathInfo();
- case "response": return getSub("response");
- case "response.header": return responseHeader;
- case "session": return getSub("session");
- case "session.attr": return sessionAttributes;
- case "session.created": return new JSDate(request.getSession(true).getCreationTime());
- case "session.accessed": return new JSDate(request.getSession(true).getLastAccessedTime());
- case "session.invalidate": return METHOD;
- case "params": return params;
- case "cookie": return cookies;
- //#end
- return null;
- }
- public void put(Object key, Object val) throws JSExn {
- try {
- //#switch(JS.toString(key))
- case "response.code": response.setStatus(JS.toInt(val));
- case "response.redirect": response.sendRedirect(JS.toString(val));
- case "response.contentType": response.setContentType(JS.toString(val));
- //#end
- } catch (IOException e) {
- throw new JSExn(e);
- }
- }
- }
-
- // Prevalence //////////////////////////////////////////////////////////////////////////////
-
- static final Hashtable prevaylers = new Hashtable();
- private Prevayler prevayler;
- private JS prevalent;
- private ServletContext cx = null;
- public void destroy() {
- try {
- synchronized(this.getClass()) {
- Prevayler privatePrevayler = prevayler;
- if (prevayler == null) return;
- prevayler = null;
- prevaylers.remove(cx);
- prevayler.takeSnapshot();
- prevayler.close();
- }
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
-
- private static class SnapshotThread extends Thread {
- ServletContext cx;
- public SnapshotThread(ServletContext cx) { this.cx = cx; }
- public void run() {
- try {
- Thread.sleep(10000);
- Prevayler privatePrevayler = (Prevayler)prevaylers.get(cx);
- if (privatePrevayler == null) return;
- privatePrevayler.takeSnapshot();
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- }
-
- public void init(ServletConfig sc) throws ServletException {
- try {
- cx = sc.getServletContext();
- synchronized(cx) {
- prevayler = (Prevayler)prevaylers.get(cx);
- if (prevalent == null) {
- PrevaylerFactory pf = new PrevaylerFactory();
- String base = cx.getRealPath("/") + "WEB-INF" + File.separatorChar + "prevalent";
- System.err.println("prevayling to " + base);
- pf.configurePrevalenceBase(base);
- XStreamSnapshotManager manager = new XStreamSnapshotManager(new JS(), base, null) {
- protected XStream createXStream() {
- XStream xstream = new XStream();
- xstream.alias("js", JS.class);
- xstream.alias("jsdate", JSDate.class);
- return xstream;
- }
- };
- System.err.println("configuring with " + manager);
- pf.configureSnapshotManager(manager);
- //pf.configureClassLoader(JSTransaction.class.getClassLoader());
- prevayler = pf.create();
- prevaylers.put(cx, prevayler);
- new SnapshotThread(cx).start();
- }
- }
- prevalent = (JS)prevayler.prevalentSystem();
- } catch (Exception e) {
- throw new ServletException(e);
- }
- }
-
- public static class JSTransaction implements Transaction {
- private JS js;
- public JSTransaction(JS js) { this.js = js; }
- public void executeOn(Object o, Date now) {
- try {
- js.call(o, new JSDate(now.getTime()), null, null, 2);
- } catch (Exception e) { throw new RuntimeException(e); }
- }
- }
-
- public static class JSQuery implements Query {
- private JS js;
- public JSQuery(JS js) { this.js = js; }
- public Object query(Object o, Date now) {
- try {
- return js.call(o, new JSDate(now.getTime()), null, null, 2);
- } catch (Exception e) { throw new RuntimeException(e); }
- }
- }
-
-}
projects / org.ibex.xt.git / blobdiff