示例#1
0
/**
 * This is the container for an instance of a site on a single server. This can be access via
 * __instance__
 *
 * @anonymous name : {local}, isField : {true}, desc : {Refers to the site being run.}, type:
 *     {library}
 * @anonymous name : {core}, isField : {true}, desc : {Refers to corejs.} example :
 *     {core.core.mail() calls corejs/core/mail.js}, type : {library}
 * @anonymous name : {external} isField : {true}, desc : {Refers to the external libraries.}, type :
 *     {library}
 * @anonymous name : {db}, isField : {true}, desc : {Refers to the database.}, type : {database}
 * @anonymous name : {setDB} desc : {changes <tt>db</tt> to refer to a different database.} param :
 *     {type : (string) name : (dbname) desc : (name of the database to which to connect)}
 * @anonymous name : {SYSOUT} desc : {Prints a string.} param : {type : (string) name : (str) desc :
 *     (the string to print)}
 * @anonymous name : {log} desc : {Global logger.} param : {type : (string) name : (str) desc : (the
 *     string to log)}
 * @expose
 * @docmodule system.system.__instance__
 */
public class AppContext extends ServletContextBase implements JSObject, Sizable {

  /** @unexpose */
  static final boolean DEBUG = AppServer.D;
  /**
   * If these files exist in the directory or parent directories of a file being run, run these
   * files first. Includes _init.js and /~~/core/init.js.
   */
  static final String INIT_FILES[] = new String[] {"/~~/core/init.js", "PREFIX_init"};

  /**
   * Initializes a new context for a given site directory.
   *
   * @param f the file to run
   */
  public AppContext(File f) {
    this(f.toString());
  }

  /**
   * Initializes a new context for a given site's path.
   *
   * @param root the path to the site from where ed is being run
   */
  public AppContext(String root) {
    this(root, guessNameAndEnv(root).name, guessNameAndEnv(root).env);
  }

  /**
   * Initializes a new context.
   *
   * @param root the path to the site
   * @param name the name of the site
   * @param environment the version of the site
   */
  public AppContext(String root, String name, String environment) {
    this(root, new File(root), name, environment);
  }

  /**
   * Initializes a new context.
   *
   * @param root the path to the site
   * @param rootFile the directory in which the site resides
   * @param name the name of the site
   * @param environment the version of the site
   */
  public AppContext(String root, File rootFile, String name, String environment) {
    this(root, rootFile, name, environment, null);
  }

  private AppContext(
      String root, File rootFile, String name, String environment, AppContext nonAdminParent) {
    super(name + ":" + environment);
    if (root == null) throw new NullPointerException("AppContext root can't be null");

    if (rootFile == null) throw new NullPointerException("AppContext rootFile can't be null");

    if (name == null) name = guessNameAndEnv(root).name;

    if (name == null) throw new NullPointerException("how could name be null");

    _root = root;
    _rootFile = rootFile;
    _git = new GitDir(_rootFile);
    _name = name;

    _environment = environment;
    _nonAdminParent = nonAdminParent;
    _admin = _nonAdminParent != null;
    _codePrefix = _admin ? "/~~/modules/admin/" : "";
    _moduleRegistry = ModuleRegistry.getNewGlobalChild();

    if (_git.isValid()) {
      _gitBranch = _git.getBranchOrTagName();
      _gitHash = _git.getCurrentHash();
    }

    _isGrid = name.equals("grid");

    _scope =
        new Scope(
            "AppContext:" + root + (_admin ? ":admin" : ""),
            _isGrid ? ed.cloud.Cloud.getInstance().getScope() : Scope.newGlobal(),
            null,
            Language.JS(),
            _rootFile);
    _scope.setGlobal(true);
    _initScope = _scope.child("_init");

    _usage = new UsageTracker(this);

    _baseScopeInit();

    _adminContext = _admin ? null : new AppContext(root, rootFile, name, environment, this);

    _rootContextReachable = new SeenPath();

    if (!_admin)
      _logger.info(
          "Started Context.  root:"
              + _root
              + " environment:"
              + environment
              + " git branch: "
              + _gitBranch);
  }

  /**
   * Returns the adapter type for the given file. Will first use the adapter selector function if it
   * was specified in init.js, otherwise will use the static type (either set in _init file, as a
   * server-wide override in 10gen.properties, or default of DIRECT_10GEN)
   *
   * @param file to produce type for
   * @return adapter type for the specified file
   */
  public AdapterType getAdapterType(File file) {

    // Q : I think this is the right thing to do
    if (inScopeSetup()) {
      return AdapterType.DIRECT_10GEN;
    }

    /*
     * cheap hack - prevent any _init.* file from getting run as anythign but DIRECT_10GEN
     */

    if (file != null && file.getName().indexOf("_init.") != -1) {
      return AdapterType.DIRECT_10GEN;
    }

    if (_adapterSelector == null) {
      return _staticAdapterType;
    }

    /*
     *  only let the app select type if file is part of application (i.e.
     *  don't do it for corejs, core modules, etc...
     */

    String fp = file.getAbsolutePath();
    String fullRoot = _rootFile.getAbsolutePath(); // there must be a nicer way to do this?

    if (!fp.startsWith(fullRoot)) {
      return AdapterType.DIRECT_10GEN;
    }

    Object o = _adapterSelector.call(_initScope, new JSString(fp.substring(fullRoot.length())));

    if (o == null) {
      return _staticAdapterType;
    }

    if (!(o instanceof JSString)) {
      log("Error : adapter selector not returning string.  Ignoring and using static adapter type");
      return _staticAdapterType;
    }

    AdapterType t = getAdapterTypeFromString(o.toString());

    return (t == null ? _staticAdapterType : t);
  }

  /**
   * Creates a copy of this context.
   *
   * @return an identical context
   */
  AppContext newCopy() {
    return new AppContext(_root, _rootFile, _name, _environment, _nonAdminParent);
  }

  /** Initializes the base scope for the application */
  private void _baseScopeInit() {
    // --- libraries

    if (_admin) _scope.put("local", new JSObjectBase(), true);
    else _setLocalObject(new JSFileLibrary(_rootFile, "local", this));

    _loadConfig();

    _core = CoreJS.get().getLibrary(getCoreJSVersion(), this, null, true);
    _logger.info("corejs : " + _core.getRoot());
    _scope.put("core", _core, true);

    _external =
        Module.getModule("external").getLibrary(getVersionForLibrary("external"), this, null, true);
    _scope.put("external", _external, true);

    _scope.put("__instance__", this, true);
    _scope.lock("__instance__");

    // --- db

    if (!_isGrid) {
      _scope.put("db", DBProvider.get(this), true);
      _scope.put(
          "setDB",
          new JSFunctionCalls1() {

            public Object call(Scope s, Object name, Object extra[]) {
              if (name.equals(_lastSetTo)) return true;

              DBBase db = (DBBase) AppContext.this._scope.get("db");
              if (!db.allowedToAccess(name.toString()))
                throw new JSException("you are not allowed to access db [" + name + "]");

              if (name.equals(db.getName())) return true;

              AppContext.this._scope.put(
                  "db", DBProvider.get(AppContext.this, name.toString()), false);
              _lastSetTo = name.toString();

              if (_adminContext != null) {
                // yes, i do want a new copy so Constructors don't get copied for both
                _adminContext._scope.put(
                    "db", DBProvider.get(AppContext.this, name.toString()), false);
              }

              return true;
            }

            String _lastSetTo = null;
          },
          true);
    }

    // --- output

    _scope.put(
        "SYSOUT",
        new JSFunctionCalls1() {
          public Object call(Scope s, Object str, Object foo[]) {
            System.out.println(AppContext.this._name + " \t " + str);
            return true;
          }
        },
        true);

    _scope.put("log", _logger, true);

    // --- random?

    _scope.put(
        "openFile",
        new JSFunctionCalls1() {
          public Object call(Scope s, Object name, Object extra[]) {
            return new JSLocalFile(_rootFile, name.toString());
          }
        },
        true);

    _scope.put("globalHead", _globalHead, true);

    Map<String, JSFileLibrary> rootFileMap = new HashMap<String, JSFileLibrary>();
    for (String rootKey : new String[] {"local", "core", "external"}) {
      Object temp = _scope.get(rootKey);
      if (temp instanceof JSFileLibrary) rootFileMap.put(rootKey, (JSFileLibrary) temp);
    }

    _scope.put(
        "fork",
        new JSFunctionCalls1() {
          public Object call(final Scope scope, final Object funcJS, final Object extra[]) {

            if (!(funcJS instanceof JSFunction))
              throw new JSException("fork has to take a function");

            return queueWork("forked", (JSFunction) funcJS, extra);
          }
        });
    _scope.lock("fork");

    ed.appserver.templates.djang10.JSHelper.install(_scope, rootFileMap, _logger);

    _scope.lock("user"); // protection against global user object
  }

  private void _loadConfig() {
    try {

      _configScope.set("__instance__", this);

      _loadConfigFromCloudObject(getSiteObject());
      _loadConfigFromCloudObject(getEnvironmentObject());

      File f;
      if (!_admin) {
        f = getFileSafe("_config.js");
        if (f == null || !f.exists()) f = getFileSafe("_config");
      } else
        f =
            new File(
                Module.getModule("core-modules/admin").getRootFile(getVersionForLibrary("admin")),
                "_config.js");

      _libraryLogger.info("config file [" + f + "] exists:" + f.exists());

      if (f == null || !f.exists()) return;

      Convert c = new Convert(f);
      JSFunction func = c.get();
      func.setUsePassedInScope(true);
      func.call(_configScope);

      _logger.debug("config things " + _configScope.keySet());
    } catch (Exception e) {
      throw new RuntimeException("couldn't load config", e);
    }
  }

  private void _loadConfigFromCloudObject(JSObject o) {
    if (o == null) return;

    _configScope.putAll((JSObject) o.get("config"));
  }

  /**
   * Get the version of corejs to run for this AppContext.
   *
   * @return the version of corejs as a string. null if should use default
   */
  public String getCoreJSVersion() {
    Object o = _scope.get("corejsversion");
    if (o != null) {
      _logger.error("you are using corejsversion which is deprecated.  please use version.corejs");
      return JS.toString(o);
    }

    return getVersionForLibrary("corejs");
  }

  /**
   * Get the version of a library to run.
   *
   * @param name the name of the library to look up
   * @return the version of the library to run as a string. null if should use default
   */
  public String getVersionForLibrary(String name) {
    String version = getVersionForLibrary(_configScope, name, this);
    _libraryVersions.set(name, version);
    return version;
  }

  public JSObject getLibraryVersionsLoaded() {
    return _libraryVersions;
  }

  /** @unexpose */
  public static String getVersionForLibrary(Scope s, String name) {
    AppRequest ar = AppRequest.getThreadLocal();
    return getVersionForLibrary(s, name, ar == null ? null : ar.getContext());
  }

  /** @unexpose */
  private static String getVersionForLibrary(Scope s, String name, AppContext ctxt) {
    final String version = _getVersionForLibrary(s, name, ctxt);
    _libraryLogger.log(
        ctxt != null && !ctxt._admin ? Level.DEBUG : Level.INFO,
        ctxt + "\t" + name + "\t" + version);
    return version;
  }

  private static String _getVersionForLibrary(Scope s, String name, AppContext ctxt) {
    final JSObject o1 =
        ctxt == null ? null : (JSObject) (s.get("version_" + ctxt.getEnvironmentName()));
    final JSObject o2 = (JSObject) s.get("version");

    _libraryLogger.debug(ctxt + "\t versionConfig:" + (o1 != null) + " config:" + (o2 != null));

    String version = _getString(name, o1, o2);
    if (version != null) return version;

    if (ctxt == null || ctxt._nonAdminParent == null) return null;

    return ctxt._nonAdminParent.getVersionForLibrary(name);
  }

  private static String _getString(String name, JSObject... places) {
    for (JSObject o : places) {
      if (o == null) continue;
      Object temp = o.get(name);
      if (temp == null) continue;
      return temp.toString();
    }
    return null;
  }

  /** @return [ <name> , <env> ] */
  static NameAndEnv guessNameAndEnv(String root) {
    root = ed.io.FileUtil.clean(root);
    root = root.replaceAll("\\.+/", "");
    String pcs[] = root.split("/+");

    if (pcs.length == 0) throw new RuntimeException("no root for : " + root);

    // handle anything with sites/foo
    for (int i = 0; i < pcs.length - 1; i++)
      if (pcs[i].equals("sites")) {
        return new NameAndEnv(pcs[i + 1], i + 2 < pcs.length ? pcs[i + 2] : null);
      }

    final int start = pcs.length - 1;
    for (int i = start; i > 0; i--) {
      String s = pcs[i];

      if (i == start
          && (s.equals("master")
              || s.equals("test")
              || s.equals("www")
              || s.equals("staging")
              ||
              // s.equals("stage") ||
              s.equals("dev"))) continue;

      return new NameAndEnv(s, i + 1 < pcs.length ? pcs[i + 1] : null);
    }

    return new NameAndEnv(pcs[0], pcs.length > 1 ? pcs[1] : null);
  }

  static class NameAndEnv {
    NameAndEnv(String name, String env) {
      this.name = name;
      this.env = env;
    }

    final String name;
    final String env;
  }

  /**
   * Returns the name of the site being run.
   *
   * @return the name of the site
   */
  public String getName() {
    return _name;
  }

  /**
   * Get the database being used.
   *
   * @return The database being used
   */
  public DBBase getDB() {
    return (DBBase) _scope.get("db");
  }

  /**
   * Given the _id of a JSFile, return the file.
   *
   * @param id _id of the file to find
   * @return The file, if found, otherwise null
   */
  JSFile getJSFile(String id) {

    if (id == null) return null;

    DBCollection f = getDB().getCollection("_files");
    return (JSFile) (f.find(new ObjectId(id)));
  }

  /**
   * Returns (and if necessary, reinitializes) the scope this context is using.
   *
   * @return the scope
   */
  public Scope getScope() {
    return _scope();
  }

  public Scope getInitScope() {
    return _initScope;
  }

  public Object getInitObject(String what) {
    return getFromInitScope(what);
  }

  public Object getFromInitScope(String what) {
    if (!_knownInitScopeThings.contains(what))
      System.err.println("*** Unknown thing requested from initScope [" + what + "]");
    return _initScope.get(what);
  }

  public void setInitObject(String name, Object value) {
    _initScope.set(name, value);
  }

  void setTLPreferredScope(AppRequest req, Scope s) {
    _scope.setTLPreferred(s);
  }

  private synchronized Scope _scope() {

    if (_inScopeSetup) return _scope;

    if (_getScopeTime() > _lastScopeInitTime) _scopeInited = false;

    if (_scopeInited) return _scope;

    _scopeInited = true;
    _lastScopeInitTime = System.currentTimeMillis();

    _setupScope();

    _setStaticAdapterType();

    _setAdapterSelectorFunction();

    return _scope;
  }

  protected void _setAdapterSelectorFunction() {

    Object o = this.getFromInitScope(INIT_ADAPTER_SELECTOR);

    if (o == null) {
      log("Adapter selector function not specified in _init file");
      return;
    }

    if (!(o instanceof JSFunction)) {
      log(
          "Adapter selector function specified in _init file  not a function.  Ignoring. ["
              + o.getClass()
              + "]");
      return;
    }

    _adapterSelector = (JSFunction) o;
    log("Adapter selector function specified in _init file");
  }

  public void setStaticAdapterTypeValue(AdapterType type) {
    log("Static adapter type directly set : " + type);
    _staticAdapterType = type;
  }

  public AdapterType getStaticAdapterTypeValue() {
    return _staticAdapterType;
  }

  /**
   * Figure out what kind of static adapter type was specified. By default it's a 10genDEFAULT app
   */
  protected void _setStaticAdapterType() {

    /*
     *  app configuration steps could have set this already.  If so, don't bother doing anything
     */
    if (_staticAdapterType != AdapterType.UNSET) {
      log("Static adapter type has already been directly set to " + _staticAdapterType);
      return;
    }

    /*
     * check to see if overridden in 10gen.properties
     */
    String override = Config.get().getProperty(INIT_ADAPTER_TYPE);

    if (override != null) {
      AdapterType t = getAdapterTypeFromString(override);

      if (t == null) {
        log(
            "Static adapter type specified as override ["
                + override
                + "] unknown - will use _init file specified or default");
      } else {
        log("Static adapter type overridden by 10gen.properties or env. Value : " + override);
        _staticAdapterType = t;
        return;
      }
    }

    /*
     *  if not, use the one from _init file if specified
     */

    _staticAdapterType = AdapterType.DIRECT_10GEN;
    Object o = getFromInitScope(INIT_ADAPTER_TYPE);

    if (o == null) {
      log("Static adapter type not specified in _init file - using default value of DIRECT_10GEN");
      return;
    }

    if (!(o instanceof JSString)) {
      log("Static adapter type from _init file not a string - using default value of DIRECT_10GEN");
      return;
    }

    _staticAdapterType = getAdapterTypeFromString(o.toString());

    if (_staticAdapterType == null) {
      log(
          "Static adapter type from _init file ["
              + o.toString()
              + "] unknown - using default value of DIRECT_10GEN");
      _staticAdapterType = AdapterType.DIRECT_10GEN;
      return;
    }

    log("Static adapter type specified in _init file = " + _staticAdapterType);

    return;
  }

  public AdapterType getAdapterTypeFromString(String s) {

    if (AdapterType.DIRECT_10GEN.toString().equals(s.toUpperCase())) {
      return AdapterType.DIRECT_10GEN;
    }

    if (AdapterType.CGI.toString().equals(s.toUpperCase())) {
      return AdapterType.CGI;
    }

    if (AdapterType.WSGI.toString().equals(s.toUpperCase())) {
      return AdapterType.WSGI;
    }

    return null;
  }

  /** @unexpose */
  public File getFileSafe(final String uri) {
    try {
      return getFile(uri);
    } catch (FileNotFoundException fnf) {
      return null;
    }
  }

  /** @unexpose */
  public File getFile(final String uri) throws FileNotFoundException {
    File f = _files.get(uri);

    if (f != null) return f;

    if (uri.startsWith("/~~/") || uri.startsWith("~~/"))
      f = _core.getFileFromPath(uri.substring(3));
    else if (uri.startsWith("/admin/")) f = _core.getFileFromPath("/modules" + uri);
    else if (uri.startsWith("/@@/") || uri.startsWith("@@/"))
      f = _external.getFileFromPath(uri.substring(3));
    else if (_localObject != null && uri.startsWith("/modules/"))
      f = _localObject.getFileFromPath(uri);
    else f = new File(_rootFile, uri);

    if (f == null) throw new FileNotFoundException(uri);

    _files.put(uri, f);
    return f;
  }

  public String getRealPath(String path) {
    try {
      return getFile(path).getAbsolutePath();
    } catch (FileNotFoundException fnf) {
      throw new RuntimeException("file not found [" + path + "]");
    }
  }

  public URL getResource(String path) {
    try {
      File f = getFile(path);
      if (!f.exists()) return null;
      return f.toURL();
    } catch (FileNotFoundException fnf) {
      // the spec says to return null if we can't find it
      // even though this is weird...
      return null;
    } catch (IOException ioe) {
      throw new RuntimeException("error opening [" + path + "]", ioe);
    }
  }

  public InputStream getResourceAsStream(String path) {
    URL url = getResource(path);
    if (url == null) return null;
    try {
      return url.openStream();
    } catch (IOException ioe) {
      throw new RuntimeException("can't getResourceAsStream [" + path + "]", ioe);
    }
  }

  /**
   * This causes the AppContext to be started over. All context level variable will be lost. If code
   * is being managed, will cause it to check that its up to date.
   */
  public void reset() {
    _reset = true;
  }

  /** Checks if this context has been reset. */
  public boolean isReset() {
    return _reset;
  }

  /**
   * Returns the path to the directory the appserver is running. (For example, site/version.)
   *
   * @return the path
   */
  public String getRoot() {
    return _root;
  }

  public File getRootFile() {
    return _rootFile;
  }

  /**
   * Creates an new request for the app server from an HTTP request.
   *
   * @param request HTTP request to create
   * @return the request
   */
  public AppRequest createRequest(HttpRequest request) {
    return createRequest(request, request.getHost(), request.getURI());
  }

  /**
   * Creates an new request for the app server from an HTTP request.
   *
   * @param request HTTP request to create
   * @param uri the URI requested
   * @return the request
   */
  public AppRequest createRequest(HttpRequest request, String host, String uri) {
    _numRequests++;

    if (AppRequest.isAdmin(request)) return new AppRequest(_adminContext, request, host, uri);

    return new AppRequest(this, request, host, uri);
  }

  /**
   * Tries to find the given file, assuming that it's missing the ".jxp" extension
   *
   * @param f File to check
   * @return same file if not found to be missing the .jxp, or a new File w/ the .jxp appended
   */
  File tryNoJXP(File f) {
    if (f.exists()) return f;

    if (f.getName().indexOf(".") >= 0) return f;

    File temp = new File(f.toString() + ".jxp");
    return temp.exists() ? temp : f;
  }

  File tryOtherExtensions(File f) {
    if (f.exists()) return f;

    if (f.getName().indexOf(".") >= 0) return f;

    for (int i = 0; i < JSFileLibrary._srcExtensions.length; i++) {
      File temp = new File(f.toString() + JSFileLibrary._srcExtensions[i]);
      if (temp.exists()) return temp;
    }

    return f;
  }

  /**
   * Maps a servlet-like URI to a jxp file.
   *
   * @param f File to check
   * @return new File with <root>.jxp if exists, orig file if not
   * @example /wiki/geir -> maps to wiki.jxp if exists
   */
  File tryServlet(File f) {
    if (f.exists()) return f;

    String uri = f.toString();

    if (uri.startsWith(_rootFile.toString())) uri = uri.substring(_rootFile.toString().length());

    if (_core != null && uri.startsWith(_core._base.toString()))
      uri = "/~~" + uri.substring(_core._base.toString().length());

    while (uri.startsWith("/")) uri = uri.substring(1);

    int start = 0;
    while (true) {

      int idx = uri.indexOf("/", start);
      if (idx < 0) break;
      String foo = uri.substring(0, idx);

      File temp = getFileSafe(foo + ".jxp");

      if (temp != null && temp.exists()) f = temp;

      start = idx + 1;
    }

    return f;
  }

  /**
   * Returns the index.jxp for the File argument if it's an existing directory, and the index.jxp
   * file exists
   *
   * @param f directory to check
   * @return new File for index.jxp in that directory, or same file object if not
   */
  File tryIndex(File f) {

    if (!(f.isDirectory() && f.exists())) return f;

    for (int i = 0; i < JSFileLibrary._srcExtensions.length; i++) {
      File temp = new File(f, "index" + JSFileLibrary._srcExtensions[i]);
      if (temp.exists()) return temp;
    }

    return f;
  }

  JxpSource getSource(File f) throws IOException {

    if (DEBUG) System.err.println("getSource\n\t " + f);

    File temp = _findFile(f);

    if (DEBUG) System.err.println("\t " + temp);

    if (!temp.exists()) return handleFileNotFound(f);

    //  if it's a directory (and we know we can't find the index file)
    //  TODO : at some point, do something where we return an index for the dir?
    if (temp.isDirectory()) return null;

    // if we are at init time, save it as an initializaiton file
    loadedFile(temp);

    // Ensure that this is w/in the right tree for the context
    if (_localObject != null && _localObject.isIn(temp)) return _localObject.getSource(temp);

    // if not, is it core?
    if (_core.isIn(temp)) return _core.getSource(temp);

    throw new RuntimeException("what?  can't find:" + f);
  }

  /**
   * Finds the appropriate file for the given path.
   *
   * <p>We have a hierarchy of attempts as we try to find a file :
   *
   * <p>1) first, see if it exists as is, or if it's really a .jxp w/o the extension 2) next, see if
   * it can be deconstructed as a servlet such that /foo/bar maps to /foo.jxp 3) See if we can find
   * the index file for it if a directory
   */
  File _findFile(File f) {

    File temp;

    if ((temp = tryNoJXP(f)) != f) {
      return temp;
    }

    if ((temp = tryOtherExtensions(f)) != f) {
      return temp;
    }

    if ((temp = tryServlet(f)) != f) {
      return temp;
    }

    if ((temp = tryIndex(f)) != f) {
      return temp;
    }

    return f;
  }

  public void loadedFile(File f) {
    if (_inScopeSetup) _initFlies.add(f);
  }

  public void addInitDependency(File f) {
    _initFlies.add(f);
  }

  JxpServlet getServlet(File f) throws IOException {
    // if this site doesn't exist, don't return anything
    if (!_rootFile.exists()) return null;

    JxpSource source = getSource(f);
    if (source == null) return null;
    return source.getServlet(this);
  }

  private void _setupScope() {
    if (_inScopeSetup) return;

    final Scope saveTLPref = _scope.getTLPreferred();
    _scope.setTLPreferred(null);

    final Scope saveTL = Scope.getThreadLocal();
    _scope.makeThreadLocal();

    _inScopeSetup = true;

    try {
      Object fo = getConfigObject("framework");

      if (fo != null) {

        Framework f = null;

        if (fo instanceof JSString) {
          f = Framework.byName(fo.toString(), null); // we allow people to just specify name
          _logger.info("Setting framework by name [" + fo.toString() + "]");
        } else if (fo instanceof JSObjectBase) {

          JSObjectBase obj = (JSObjectBase) fo;

          if (obj.containsKey("name")) {

            String s = obj.getAsString("version");

            f = Framework.byName(obj.getAsString("name"), s);
            _logger.info("Setting framework by name [" + obj.getAsString("name") + "]");
          } else if (obj.containsKey("custom")) {

            Object o = obj.get("custom");

            if (o instanceof JSObjectBase) {
              f = Framework.byCustom((JSObjectBase) o);
              _logger.info("Setting framework by custom [" + o + "]");
            } else {
              throw new RuntimeException("Error - custom framework wasn't an object [" + o + "]");
            }
          } else if (obj.containsKey("classname")) {
            f = Framework.byClass(obj.getAsString("classname"));
            _logger.info("Setting framework by class [" + obj.getAsString("classname") + "]");
          }
        }

        if (f == null) {
          throw new RuntimeException("Error : can't find framework [" + fo + "]");
        }

        f.install(this);
      }

      _runInitFiles(INIT_FILES);

      if (_adminContext != null) {
        _adminContext._scope.set("siteScope", _scope);
        _adminContext._setLocalObject(_localObject);
      }

      _lastScopeInitTime = _getScopeTime();
    } catch (RuntimeException re) {
      _scopeInited = false;
      throw re;
    } catch (Exception e) {
      _scopeInited = false;
      throw new RuntimeException(e);
    } finally {
      _inScopeSetup = false;
      _scope.setTLPreferred(saveTLPref);

      if (saveTL != null) saveTL.makeThreadLocal();

      this.approxSize(_rootContextReachable);
    }
  }

  public boolean inScopeSetup() {
    return _inScopeSetup;
  }

  private void _runInitFiles(String[] files) throws IOException {

    if (files == null) return;

    for (JSFunction func : _initRefreshHooks) {
      func.call(_initScope, null);
    }

    for (int i = 0; i < files.length; i++) runInitFile(files[i].replaceAll("PREFIX", _codePrefix));
  }

  public void addInitRefreshHook(JSFunction func) {
    _initRefreshHooks.add(func);
  }

  /** @param path (ex: /~~/foo.js ) */
  public void runInitFile(String path) throws IOException {
    _runInitFile(tryOtherExtensions(getFile(path)));
  }

  private void _runInitFile(File f) throws IOException {
    if (f == null) return;

    if (!f.exists()) return;

    _initFlies.add(f);
    JxpSource s = getSource(f);
    JSFunction func = s.getFunction();
    func.setUsePassedInScope(true);
    func.call(_initScope);
  }

  long _getScopeTime() {
    long last = 0;
    for (File f : _initFlies) if (f.exists()) last = Math.max(last, f.lastModified());
    return last;
  }

  /**
   * Convert this AppContext to a string by returning the name of the directory it's running in.
   *
   * @return the filename of its root directory
   */
  public String toString() {
    return _rootFile.toString();
  }

  public String debugInfo() {
    return _rootFile + " admin:" + _admin;
  }

  public void fix(Throwable t) {
    StackTraceHolder.getInstance().fix(t);
  }

  /**
   * Get a "global" head array. This array contains HTML that will be inserted into the head of
   * every request served by this app context. It's analagous to the <tt>head</tt> array, but
   * persistent.
   *
   * @return a mutable array
   */
  public JSArray getGlobalHead() {
    return _globalHead;
  }

  /**
   * Gets the date of creation for this app context.
   *
   * @return the creation date as a JS Date.
   */
  public JSDate getWhenCreated() {
    return _created;
  }

  /**
   * Gets the number of requests served by this app context.
   *
   * @return the number of requests served
   */
  public int getNumRequests() {
    return _numRequests;
  }

  /**
   * Get the name of the git branch we think we're running.
   *
   * @return the name of the git branch, as a string
   */
  public String getGitBranch() {
    return _gitBranch;
  }

  public String getGitHash() {
    return _gitHash;
  }

  /**
   * Update the git branch that we're running and return it.
   *
   * @return the name of the git branch, or null if there isn't any
   */
  public String getCurrentGitBranch() {
    return getCurrentGitBranch(false);
  }

  public String getCurrentGitBranch(boolean forceUpdate) {
    if (_gitBranch == null) return null;

    if (_gitFile == null) _gitFile = new File(_rootFile, ".git/HEAD");

    if (!_gitFile.exists()) throw new RuntimeException("this should be impossible");

    if (forceUpdate || _lastScopeInitTime < _gitFile.lastModified()) {
      _gitBranch = _git.getBranchOrTagName();
      _gitHash = _git.getCurrentHash();
    }

    return _gitBranch;
  }

  /**
   * Get the environment in which this site is running
   *
   * @return the environment name as a string
   */
  public String getEnvironmentName() {
    return _environment;
  }

  /**
   * updates the context to the correct branch based on environment and to the latest version of the
   * code if name or environemnt is missing, does nothing
   */
  public String updateCode() {

    if (!_git.isValid()) throw new RuntimeException(_rootFile + " is not a git repository");

    _logger.info("going to update code");
    _git.fullUpdate();

    if (_name == null || _environment == null) return getCurrentGitBranch();

    JSObject env = getEnvironmentObject();
    if (env == null) return null;

    String branch = env.get("branch").toString();
    _logger.info("updating to [" + branch + "]");

    _git.checkout(branch);
    Python.deleteCachedJythonFiles(_rootFile);

    return getCurrentGitBranch(true);
  }

  private JSObject getSiteObject() {
    return AppContextHolder.getSiteFromCloud(_name);
  }

  private JSObject getEnvironmentObject() {
    return AppContextHolder.getEnvironmentFromCloud(_name, _environment);
  }

  private void _setLocalObject(JSFileLibrary local) {
    _localObject = local;
    _scope.put("local", _localObject, true);
    _scope.put("jxp", _localObject, true);
    _scope.warn("jxp");
  }

  JxpSource handleFileNotFound(File f) {
    String name = f.getName();
    if (name.endsWith(".class")) {
      name = name.substring(0, name.length() - 6);
      return getJxpServlet(name);
    }

    return null;
  }

  public JxpSource getJxpServlet(String name) {
    JxpSource source = _httpServlets.get(name);
    if (source != null) return source;

    try {
      Class c = Class.forName(name);
      Object n = c.newInstance();
      if (!(n instanceof HttpServlet))
        throw new RuntimeException("class [" + name + "] is not a HttpServlet");

      HttpServlet servlet = (HttpServlet) n;
      servlet.init(createServletConfig(name));
      source = new ServletSource(servlet);
      _httpServlets.put(name, source);
      return source;
    } catch (Exception e) {
      throw new RuntimeException("can't load [" + name + "]", e);
    }
  }

  ServletConfig createServletConfig(final String name) {
    final Object rawServletConfigs = _scope.get("servletConfigs");
    final Object servletConfigObject =
        rawServletConfigs instanceof JSObject ? ((JSObject) rawServletConfigs).get(name) : null;
    final JSObject servletConfig;
    if (servletConfigObject instanceof JSObject) servletConfig = (JSObject) servletConfigObject;
    else servletConfig = null;

    return new ServletConfig() {
      public String getInitParameter(String name) {
        if (servletConfig == null) return null;
        Object foo = servletConfig.get(name);
        if (foo == null) return null;
        return foo.toString();
      }

      public Enumeration getInitParameterNames() {
        Collection keys;
        if (servletConfig == null) keys = new LinkedList();
        else keys = servletConfig.keySet();
        return new CollectionEnumeration(keys);
      }

      public ServletContext getServletContext() {
        return AppContext.this;
      }

      public String getServletName() {
        return name;
      }
    };
  }

  public static AppContext findThreadLocal() {

    AppContext context = _tl.get();
    if (context != null) return context;

    AppRequest req = AppRequest.getThreadLocal();
    if (req != null) return req._context;

    Scope s = Scope.getThreadLocal();
    if (s != null) {
      Object foo = s.get("__instance__");
      if (foo instanceof AppContext) return (AppContext) foo;
    }

    return null;
  }

  public void makeThreadLocal() {
    _tl.set(this);
  }

  public static void clearThreadLocal() {
    _tl.set(null);
  }

  public String getInitParameter(String name) {
    Object foo = _configScope.get(name);
    if (foo == null) return null;
    return foo.toString();
  }

  public Enumeration getInitParameterNames() {
    return new CollectionEnumeration(_configScope.keySet());
  }

  public Object getConfigObject(String name) {
    return _configScope.get(name);
  }

  public void setConfigObject(String name, Object value) {
    _configScope.set(name, value);
  }

  public String getContextPath() {
    return "";
  }

  public RequestDispatcher getNamedDispatcher(String name) {
    throw new RuntimeException("getNamedDispatcher not implemented");
  }

  public RequestDispatcher getRequestDispatcher(String name) {
    throw new RuntimeException("getRequestDispatcher not implemented");
  }

  public Set getResourcePaths(String path) {
    throw new RuntimeException("getResourcePaths not implemented");
  }

  public AppContext getSiteInstance() {
    if (_nonAdminParent == null) return this;
    return _nonAdminParent;
  }

  public long approxSize() {
    return approxSize(new SeenPath());
  }

  public long approxSize(SeenPath seen) {
    long size = 0;

    seen.visited(this);

    if (seen.shouldVisit(_scope, this)) size += _scope.approxSize(seen, false, true);
    if (seen.shouldVisit(_initScope, this)) size += _initScope.approxSize(seen, true, false);

    size += JSObjectSize.size(_localObject, seen, this);
    size += JSObjectSize.size(_core, seen, this);
    size += JSObjectSize.size(_external, seen, this);

    if (seen.shouldVisit(_adminContext, this)) size += _adminContext.approxSize(seen);

    size += JSObjectSize.size(_logger, seen, this);

    return size;
  }

  public int hashCode() {
    return System.identityHashCode(this);
  }

  public boolean equals(Object o) {
    return o == this;
  }

  public AppWork queueWork(String identifier, JSFunction work, Object... params) {
    return queueWork(new AppWork.FunctionAppWork(this, identifier, work, params));
  }

  public AppWork queueWork(AppWork work) {
    if (_workQueue == null) {
      _workQueue = new ArrayBlockingQueue<AppWork>(100);
      AppWork.addQueue(_workQueue);
    }

    if (_workQueue.offer(work)) return work;

    throw new RuntimeException("work queue full!");
  }

  public Logger getLogger(String sub) {
    return _logger.getChild(sub);
  }

  public ModuleRegistry getModuleRegistry() {
    return _moduleRegistry;
  }

  // ----  START JSObject INTERFACE

  public Object get(Object n) {
    return _scope.get(n);
  }

  public JSFunction getFunction(String name) {
    return _scope.getFunction(name);
  }

  public final Set<String> keySet() {
    return _scope.keySet();
  }

  public Set<String> keySet(boolean includePrototype) {
    return _scope.keySet(includePrototype);
  }

  public boolean containsKey(String s) {
    return _scope.containsKey(s);
  }

  public boolean containsKey(String s, boolean includePrototype) {
    return _scope.containsKey(s, includePrototype);
  }

  public Object set(Object n, Object v) {
    return _scope.putExplicit(n.toString(), v);
  }

  public Object setInt(int n, Object v) {
    throw new RuntimeException("not allowed");
  }

  public Object getInt(int n) {
    return _scope.getInt(n);
  }

  public Object removeField(Object n) {
    return _scope.removeField(n);
  }

  public JSFunction getConstructor() {
    return null;
  }

  public JSObject getSuper() {
    return null;
  }

  // ----  END BROKEN JSOBJET INTERFACE

  public TimeZone getTimeZone() {
    return _tz;
  }

  public void setTimeZone(String tz) {
    if (tz.length() == 3) tz = tz.toUpperCase();
    _tz = TimeZone.getTimeZone(tz);
    if (!_tz.getID().equals(tz)) throw new RuntimeException("can't find time zone[" + tz + "]");
  }

  final String _name;
  final String _root;
  final File _rootFile;
  final GitDir _git;

  private String _gitBranch;
  private String _gitHash;
  final String _environment;
  final boolean _admin;

  final AppContext _adminContext;
  final String _codePrefix;

  final AppContext _nonAdminParent;

  private JSFileLibrary _localObject;
  private JSFileLibrary _core;
  private JSFileLibrary _external;

  final Scope _scope;
  final SeenPath _rootContextReachable;
  final Scope _initScope;
  final Scope _configScope = new Scope();
  final UsageTracker _usage;
  final ModuleRegistry _moduleRegistry;

  final JSArray _globalHead = new JSArray();

  private final Map<String, File> _files = Collections.synchronizedMap(new HashMap<String, File>());
  private final Set<File> _initFlies = new HashSet<File>();
  private final Map<String, JxpSource> _httpServlets =
      Collections.synchronizedMap(new HashMap<String, JxpSource>());
  private final JSObject _libraryVersions = new JSObjectBase();

  private Queue<AppWork> _workQueue;
  private TimeZone _tz = TimeZone.getDefault();

  boolean _scopeInited = false;
  boolean _inScopeSetup = false;
  long _lastScopeInitTime = 0;

  final boolean _isGrid;

  boolean _reset = false;
  int _numRequests = 0;
  final JSDate _created = new JSDate();

  private File _gitFile = null;
  private long _lastGitCheckTime = 0;

  private Collection<JSFunction> _initRefreshHooks = new ArrayList<JSFunction>();

  /*
   *  adapter type - can have either a static ("all files in this app are X")
   *  or dynamic - the provided selector function dynamically chooses, falling
   *  back to the static if it returns null
   */
  public static final String INIT_ADAPTER_TYPE = "adapterType";
  public static final String INIT_ADAPTER_SELECTOR = "adapterSelector";

  private AdapterType _staticAdapterType = AdapterType.UNSET;
  private JSFunction _adapterSelector = null;

  private static Logger _libraryLogger = Logger.getLogger("library.load");

  static {
    _libraryLogger.setLevel(Level.INFO);
  }

  private static final Set<String> _knownInitScopeThings = new HashSet<String>();
  private static final ThreadLocal<AppContext> _tl = new ThreadLocal<AppContext>();

  static {
    _knownInitScopeThings.add("mapUrlToJxpFileCore");
    _knownInitScopeThings.add("mapUrlToJxpFile");
    _knownInitScopeThings.add("allowed");
    _knownInitScopeThings.add("staticCacheTime");
    _knownInitScopeThings.add("handle404");
    _knownInitScopeThings.add(INIT_ADAPTER_TYPE);
    _knownInitScopeThings.add(INIT_ADAPTER_SELECTOR);
  }

  public static final class AppContextReachable extends ReflectionVisitor.Reachable {
    public boolean follow(Object o, Class c, java.lang.reflect.Field f) {

      if (_reachableStoppers.contains(c)) return false;

      if (f != null && _reachableStoppers.contains(f.getType())) return false;

      return super.follow(o, c, f);
    }
  }

  private static final Set<Class> _reachableStoppers = new HashSet<Class>();

  static {
    _reachableStoppers.add(HttpServer.class);
    _reachableStoppers.add(AppServer.class);
    _reachableStoppers.add(DBTCP.class);
    _reachableStoppers.add(Mongo.class);
    _reachableStoppers.add(WeakBag.class);
    _reachableStoppers.add(WeakValueMap.class);
  }
}
示例#2
0
 static {
   _libraryLogger.setLevel(Level.INFO);
 }