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Mini Shell
Mini Shell
/**
* TIBCO PageBus(TM) version 2.0.0
*
* Copyright (c) 2006-2009, TIBCO Software Inc.
* All rights reserved.
*
* Licensed 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.
*
*
* Includes code from the official reference implementation of the OpenAjax
* Hub that is provided by OpenAjax Alliance. Specification is available at:
*
* http://www.openajax.org/member/wiki/OpenAjax_Hub_Specification
*
* Copyright 2006-2009 OpenAjax Alliance
*
* Licensed 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.
*
******************************************************************************/
// prevent re-definition of the OpenAjax object
if(!window["OpenAjax"]){
OpenAjax = new function(){
var t = true;
var f = false;
var g = window;
var ooh = "org.openajax.hub.";
var h = {};
this.hub = h;
h.implementer = "http://openajax.org";
h.implVersion = "2.0";
h.specVersion = "2.0";
h.implExtraData = {};
var libs = {};
h.libraries = libs;
h.registerLibrary = function(prefix, nsURL, version, extra){
libs[prefix] = {
prefix: prefix,
namespaceURI: nsURL,
version: version,
extraData: extra
};
this.publish(ooh+"registerLibrary", libs[prefix]);
}
h.unregisterLibrary = function(prefix){
this.publish(ooh+"unregisterLibrary", libs[prefix]);
delete libs[prefix];
}
h._subscriptions = { c:{}, s:[] };
h._cleanup = [];
h._subIndex = 0;
h._pubDepth = 0;
h.subscribe = function(name, callback, scope, subscriberData, filter)
{
if(!scope){
scope = window;
}
var handle = name + "." + this._subIndex;
var sub = { scope: scope, cb: callback, fcb: filter, data: subscriberData, sid: this._subIndex++, hdl: handle };
var path = name.split(".");
this._subscribe(this._subscriptions, path, 0, sub);
return handle;
}
h.publish = function(name, message)
{
var path = name.split(".");
this._pubDepth++;
this._publish(this._subscriptions, path, 0, name, message);
this._pubDepth--;
if((this._cleanup.length > 0) && (this._pubDepth == 0)) {
for(var i = 0; i < this._cleanup.length; i++)
this.unsubscribe(this._cleanup[i].hdl);
delete(this._cleanup);
this._cleanup = [];
}
}
h.unsubscribe = function(sub)
{
var path = sub.split(".");
var sid = path.pop();
this._unsubscribe(this._subscriptions, path, 0, sid);
}
h._subscribe = function(tree, path, index, sub)
{
var token = path[index];
if(index == path.length)
tree.s.push(sub);
else {
if(typeof tree.c == "undefined")
tree.c = {};
if(typeof tree.c[token] == "undefined") {
tree.c[token] = { c: {}, s: [] };
this._subscribe(tree.c[token], path, index + 1, sub);
}
else
this._subscribe( tree.c[token], path, index + 1, sub);
}
}
h._publish = function(tree, path, index, name, msg, pid) {
if(typeof tree != "undefined") {
var node;
if(index == path.length) {
node = tree;
} else {
this._publish(tree.c[path[index]], path, index + 1, name, msg, pid);
this._publish(tree.c["*"], path, index + 1, name, msg, pid);
node = tree.c["**"];
}
if(typeof node != "undefined") {
var callbacks = node.s;
var max = callbacks.length;
for(var i = 0; i < max; i++) {
if(callbacks[i].cb) {
var sc = callbacks[i].scope;
var cb = callbacks[i].cb;
var fcb = callbacks[i].fcb;
var d = callbacks[i].data;
if(typeof cb == "string"){
// get a function object
cb = sc[cb];
}
if(typeof fcb == "string"){
// get a function object
fcb = sc[fcb];
}
if((!fcb) || (fcb.call(sc, name, msg, d))) {
cb.call(sc, name, msg, d, pid);
}
}
}
}
}
}
h._unsubscribe = function(tree, path, index, sid) {
if(typeof tree != "undefined") {
if(index < path.length) {
var childNode = tree.c[path[index]];
this._unsubscribe(childNode, path, index + 1, sid);
if(childNode.s.length == 0) {
for(var x in childNode.c)
return;
delete tree.c[path[index]];
}
return;
}
else {
var callbacks = tree.s;
var max = callbacks.length;
for(var i = 0; i < max; i++)
if(sid == callbacks[i].sid) {
if(this._pubDepth > 0) {
callbacks[i].cb = null;
this._cleanup.push(callbacks[i]);
}
else
callbacks.splice(i, 1);
return;
}
}
}
}
};
// Register the OpenAjax Hub itself as a library.
OpenAjax.hub.registerLibrary("OpenAjax", "http://openajax.org/hub", "1.0", {});
}
if(!window["PageBus"]) {
PageBus = new function() {
var D = 0;
var Q = [];
var that = this;
this.version = "2.0.0";
this._debug = function() {
debugger;
};
_badParm = function() {
throw new Error("OpenAjax.hub.Errors.BadParameters");
}
_valPub = function(name) {
if((name == null) || (name.indexOf("*") != -1) || (name.indexOf("..") != -1) ||
(name.charAt(0) == ".") || (name.charAt(name.length-1) == "."))
_badParm();
}
_valSub = function(name) {
var path = name.split(".");
var len = path.length;
for(var i = 0; i < len; i++) {
if((path[i] == "") ||
((path[i].indexOf("*") != -1) && (path[i] != "*") && (path[i] != "**")))
_badParm();
if((path[i] == "**") && (i < len - 1))
_badParm();
}
return path;
}
_cacheIt = function( subData ) {
return ( (subData) && (typeof subData == "object") && (subData["PageBus"]) && (subData.PageBus["cache"]) );
};
/////////////////////////////////
_TopicMatcher = function() {
this._items = {};
};
_TopicMatcher.prototype.store = function( topic, val ) {
var path = topic.split(".");
var len = path.length;
_recurse = function(tree, index) {
if (index == len)
tree["."] = { topic: topic, value: val };
else {
var token = path[index];
if (!tree[token])
tree[token] = {};
_recurse(tree[token], index + 1);
}
};
_recurse( this._items, 0 );
};
_TopicMatcher.prototype.match = function( topic, exactMatch ) {
var path = topic.split(".");
var len = path.length;
var res = [];
_recurse = function(tree, index) {
if(!tree)
return;
var node;
if (index == len)
node = tree;
else {
_recurse(tree[path[index]], index + 1);
if(exactMatch)
return;
if(path[index] != "**")
_recurse(tree["*"], index + 1);
node = tree["**"];
}
if ( (!node) || (!node["."]) )
return;
res.push(node["."]);
};
_recurse( this._items, 0 );
return res;
};
_TopicMatcher.prototype.exists = function( topic, exactMatch ) {
var path = topic.split(".");
var len = path.length;
var res = false;
_recurse = function(tree, index) {
if(!tree)
return;
var node;
if (index == len)
node = tree;
else {
_recurse(tree[path[index]], index + 1);
if(res || exactMatch)
return;
if(path[index] != "**") {
_recurse(tree["*"], index + 1);
if(res)
return;
}
node = tree["**"];
}
if ( (!node) || (!node["."]) )
return;
res = true;
};
_recurse( this._items, 0 );
return res;
};
_TopicMatcher.prototype.clear = function( topic ) {
var path = topic.split(".");
var len = path.length;
_recurse = function(tree, index) {
if(!tree)
return;
if (index == len) {
if (tree["."])
delete tree["."];
}
else {
_recurse(tree[path[index]], index + 1);
for(var x in tree[path[index]]) {
return;
}
delete tree[path[index]];
}
};
_recurse( this._items, 0 );
};
_TopicMatcher.prototype.wildcardMatch = function( topic ) {
var path = topic.split(".");
var len = path.length;
var res = [];
_recurse = function( tree, index ) {
var tok = path[index];
var node;
if( (!tree) || (index == len) )
return;
if( tok == "**" ) {
for( var n in tree ) {
if( n != "." ) {
node = tree[n];
if( node["."] )
res.push( node["."] );
_recurse( node, index );
}
}
}
else if( tok == "*" ) {
for( var n in tree ) {
if( (n != ".") && (n != "**") ){
node = tree[n];
if( index == len - 1 ) {
if( node["."] )
res.push( node["."] );
}
else
_recurse( node, index + 1 );
}
}
}
else {
node = tree[tok];
if(!node)
return;
if( index == len - 1 ) {
if( node["."] )
res.push( node["."] );
}
else
_recurse( node, index + 1 );
}
};
_recurse( this._items, 0 );
return res;
};
/////////////////////////////////
this._refs = {};
this._doCache = new _TopicMatcher();
this._caches = new _TopicMatcher();
_isCaching = function( topic ) {
return that._doCache.exists( topic, false );
};
_copy = function(obj) {
var c;
if( typeof(obj) == "object" ) {
if(obj == null)
return null;
else if(obj.constructor == Array) {
c = [];
for(var i = 0; i < obj.length; i++)
c[i] = _copy(obj[i]);
return c;
}
else if(obj.constructor == Date) {
c = new Date();
c.setDate(obj.getDate());
return c;
}
c = {};
for(var p in obj)
c[p] = _copy(obj[p]);
return c;
}
else {
return obj;
}
};
this._add = function( topic, subID ) {
var dc;
var dca = this._doCache.match( topic, true );
if( dca.length > 0 )
dc = dca[0].value;
else {
dc = { rc: 0 };
this._doCache.store( topic, dc );
}
dc.rc++;
this._refs[subID] = topic;
};
this._remove = function( subID ) {
var topic = this._refs[subID];
if( !topic )
return;
delete this._refs[subID];
var dca = this._doCache.match( topic, true );
if(dca.length == 0)
return;
dca[0].value.rc--;
if(dca[0].value.rc == 0) {
this._doCache.clear(topic);
var caches = this._caches.wildcardMatch(topic);
for(var i = 0; i < caches.length; i++) {
if( !(this._doCache.exists(caches[i].topic, false)) )
this._caches.clear(caches[i].topic);
}
}
};
this.subscribe = function( topic, scope, onData, subscriberData ) {
if(!subscriberData)
subscriberData = null;
var sid = OpenAjax.hub.subscribe( topic, onData, scope, subscriberData );
// Create caches after we subscribe
if( _cacheIt( subscriberData ) ) {
this._add( topic, sid );
var vals = this.query( topic );
for (var i = 0; i < vals.length; i++) {
try {
onData.call(scope ? scope : window, vals[i].topic, vals[i].value, subscriberData);
}
catch(e) {
PageBus._debug();
}
}
}
return sid;
}
this.publish = function ( topic, data ) {
_valPub( topic );
Q.push({ n: topic, m: data, d: (D + 1) });
if( _isCaching( topic ) ) {
// Cache a copy of the message before we deliver the message
try {
this._caches.store( topic, data );
} catch(e) {
_badParm();
}
}
if(D == 0) {
while(Q.length > 0) {
var qitem = Q.shift();
var path = qitem.n.split(".");
try {
D = qitem.d;
OpenAjax.hub.publish(qitem.n, qitem.m);
D = 0;
}
catch(err) {
D = 0;
throw(err);
}
}
}
}
this.unsubscribe = function(sub) {
try {
this._remove(sub);
OpenAjax.hub.unsubscribe(sub);
}
catch(err) {
_badParm();
}
}
this.store = function( topic, data ) {
if( !_isCaching( topic ) )
throw new Error( "PageBus.cache.NoCache" );
this.publish( topic, data );
};
this.query = function( topic ) {
try {
_valSub( topic );
return this._caches.wildcardMatch( topic );
} catch(e) {
_badParm();
}
};
};
OpenAjax.hub.registerLibrary("PageBus", "http://tibco.com/PageBus", "1.2.0", {});
}
Zerion Mini Shell 1.0