Temporarily embed the jsonrpc client into implementation.web to get the test sample working

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@685533 13f79535-47bb-0310-9956-ffa450edef68

3 files changed, 554 insertions, 7 deletions

diff --git a/java/sca/modules/implementation-web-runtime/src/main/java/org/apache/tuscany/sca/implementation/web/ComponentContextServlet.java b/java/sca/modules/implementation-web-runtime/src/main/java/org/apache/tuscany/sca/implementation/web/ComponentContextServlet.java
index 6318b9ecb7..bf33f7ad9e 100644
--- a/java/sca/modules/implementation-web-runtime/src/main/java/org/apache/tuscany/sca/implementation/web/ComponentContextServlet.java
+++ b/java/sca/modules/implementation-web-runtime/src/main/java/org/apache/tuscany/sca/implementation/web/ComponentContextServlet.java
@@ -55,6 +55,10 @@ public class ComponentContextServlet extends HttpServlet {
     protected transient ServletContext servletContext;
     private transient List<ContextScriptProcessor> contextScriptProcessors = new ArrayList<ContextScriptProcessor>();
 
+    public ComponentContextServlet() {
+        contextScriptProcessors.add(new JSONRPCScripProcessor());
+    }
+
     @Override
     public void init(ServletConfig servletConfig) throws ServletException {
         this.servletContext = servletConfig.getServletContext();
@@ -99,13 +103,6 @@ public class ComponentContextServlet extends HttpServlet {
         out.println("      return SCA.componentContext.serviceProxys[i];");
         out.println("   };");
         out.println("   if (componentContext == undefined) var componentContext = SCA.componentContext;");
-
-        // TODO remove this dummy service once the rest is implemented
-        out.println("   var proxy = new Object();");
-        out.println("   proxy.sayHello = function(s, f) {f('proxyHello ' + s);};");
-        out.println("   SCA.componentContext.serviceProxys.push(proxy);");
-        out.println("   SCA.componentContext.serviceNames.push('service');");
-
         out.println("}");
 
         for (ContextScriptProcessor csp : contextScriptProcessors) {
diff --git a/java/sca/modules/implementation-web-runtime/src/main/java/org/apache/tuscany/sca/implementation/web/JSONRPCScripProcessor.java b/java/sca/modules/implementation-web-runtime/src/main/java/org/apache/tuscany/sca/implementation/web/JSONRPCScripProcessor.java
new file mode 100644
index 0000000000..e4ec0d71f9
--- /dev/null
+++ b/java/sca/modules/implementation-web-runtime/src/main/java/org/apache/tuscany/sca/implementation/web/JSONRPCScripProcessor.java
@@ -0,0 +1,57 @@
+/*

+ * Licensed to the Apache Software Foundation (ASF) under one

+ * or more contributor license agreements.  See the NOTICE file

+ * distributed with this work for additional information

+ * regarding copyright ownership.  The ASF licenses this file

+ * to you 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.    

+ */

+

+package org.apache.tuscany.sca.implementation.web;

+

+import java.io.IOException;

+import java.io.InputStream;

+import java.io.PrintWriter;

+

+import javax.servlet.http.HttpServletRequest;

+import javax.servlet.http.HttpServletResponse;

+

+import org.apache.tuscany.sca.assembly.Binding;

+import org.apache.tuscany.sca.assembly.ComponentReference;

+

+public class JSONRPCScripProcessor implements ContextScriptProcessor {

+

+    public void scriptInit(HttpServletRequest req, HttpServletResponse response) throws IOException {

+        PrintWriter out = response.getWriter();

+        InputStream is = getClass().getClassLoader().getResourceAsStream("jsonrpc.js");

+        if (is != null) {

+            int i;

+            while ((i = is.read()) != -1) {

+                out.write(i);

+            }           

+        }

+        

+        out.println();

+    }

+

+    public void scriptReference(ComponentReference cr, HttpServletRequest req, HttpServletResponse response) throws IOException {

+        for (Binding b : cr.getBindings()) {

+            if ("org.apache.tuscany.sca.binding.jsonrpc.JSONRPCBinding".equals(b.getClass().getName())) {

+               PrintWriter out = response.getWriter();

+               out.println("SCA.componentContext.serviceNames.push('" + cr.getName() + "');");

+               out.println("SCA.componentContext.serviceProxys.push(new JSONRpcClient('" + cr.getReference().getTargets().get(0).getName() + "').Service);");

+            }

+        }

+    }

+

+}

diff --git a/java/sca/modules/implementation-web-runtime/src/main/resources/jsonrpc.js b/java/sca/modules/implementation-web-runtime/src/main/resources/jsonrpc.js
new file mode 100644
index 0000000000..8eb477c2e5
--- /dev/null
+++ b/java/sca/modules/implementation-web-runtime/src/main/resources/jsonrpc.js
@@ -0,0 +1,493 @@
+/*

+ * JSON-RPC JavaScript client

+ *

+ * $Id: jsonrpc.js,v 1.36.2.3 2006/03/08 15:09:37 mclark Exp $

+ *

+ * Copyright (c) 2003-2004 Jan-Klaas Kollhof

+ * Copyright (c) 2005 Michael Clark, Metaparadigm Pte Ltd

+ *

+ * This code is based on Jan-Klaas' JavaScript o lait library (jsolait).

+ *

+ * 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.

+ *

+ */

+

+/*

+ * Modifications for Apache Tuscany:

+ * - JSONRpcClient_createMethod changed so callback is last arg

+ */

+

+/* escape a character */

+

+escapeJSONChar =

+function escapeJSONChar(c)

+{

+    if(c == "\"" || c == "\\") return "\\" + c;

+    else if (c == "\b") return "\\b";

+    else if (c == "\f") return "\\f";

+    else if (c == "\n") return "\\n";

+    else if (c == "\r") return "\\r";

+    else if (c == "\t") return "\\t";

+    var hex = c.charCodeAt(0).toString(16);

+    if(hex.length == 1) return "\\u000" + hex;

+    else if(hex.length == 2) return "\\u00" + hex;

+    else if(hex.length == 3) return "\\u0" + hex;

+    else return "\\u" + hex;

+};

+

+

+/* encode a string into JSON format */

+

+escapeJSONString =

+function escapeJSONString(s)

+{

+    /* The following should suffice but Safari's regex is b0rken

+       (doesn't support callback substitutions)

+       return "\"" + s.replace(/([^\u0020-\u007f]|[\\\"])/g,

+       escapeJSONChar) + "\"";

+    */

+

+    /* Rather inefficient way to do it */

+    var parts = s.split("");

+    for(var i=0; i < parts.length; i++) {

+	var c =parts[i];

+	if(c == '"' ||

+	   c == '\\' ||

+	   c.charCodeAt(0) < 32 ||

+	   c.charCodeAt(0) >= 128)

+	    parts[i] = escapeJSONChar(parts[i]);

+    }

+    return "\"" + parts.join("") + "\"";

+};

+

+

+/* Marshall objects to JSON format */

+

+toJSON = function toJSON(o)

+{

+    if(o == null) {

+	return "null";

+    } else if(o.constructor == String) {

+	return escapeJSONString(o);

+    } else if(o.constructor == Number) {

+	return o.toString();

+    } else if(o.constructor == Boolean) {

+	return o.toString();

+    } else if(o.constructor == Date) {

+	return '{javaClass: "java.util.Date", time: ' + o.valueOf() +'}';

+    } else if(o.constructor == Array) {

+	var v = [];

+	for(var i = 0; i < o.length; i++) v.push(toJSON(o[i]));

+	return "[" + v.join(", ") + "]";

+    } else {

+	var v = [];

+	for(attr in o) {

+	    if(o[attr] == null) v.push("\"" + attr + "\": null");

+	    else if(typeof o[attr] == "function"); /* skip */

+	    else v.push(escapeJSONString(attr) + ": " + toJSON(o[attr]));

+	}

+	return "{" + v.join(", ") + "}";

+    }

+};

+

+

+/* JSONRpcClient constructor */

+

+JSONRpcClient =

+function JSONRpcClient_ctor(serverURL, user, pass, objectID)

+{

+    this.serverURL = serverURL;

+    this.user = user;

+    this.pass = pass;

+    this.objectID = objectID;

+

+    /* Add standard methods */

+    if(this.objectID) {

+	this._addMethods(["listMethods"]);

+	var req = this._makeRequest("listMethods", []);

+    } else {

+	this._addMethods(["system.listMethods"]);

+	var req = this._makeRequest("system.listMethods", []);

+    }

+    var m = this._sendRequest(req);

+    this._addMethods(m);

+};

+

+

+/* JSONRpcCLient.Exception */

+

+JSONRpcClient.Exception =

+function JSONRpcClient_Exception_ctor(code, message, javaStack)

+{

+    this.code = code;

+    var name;

+    if(javaStack) {

+	this.javaStack = javaStack;

+	var m = javaStack.match(/^([^:]*)/);

+	if(m) name = m[0];

+    }

+    if(name) this.name = name;

+    else this.name = "JSONRpcClientException";

+    this.message = message;

+};

+

+JSONRpcClient.Exception.CODE_REMOTE_EXCEPTION = 490;

+JSONRpcClient.Exception.CODE_ERR_CLIENT = 550;

+JSONRpcClient.Exception.CODE_ERR_PARSE = 590;

+JSONRpcClient.Exception.CODE_ERR_NOMETHOD = 591;

+JSONRpcClient.Exception.CODE_ERR_UNMARSHALL = 592;

+JSONRpcClient.Exception.CODE_ERR_MARSHALL = 593;

+

+JSONRpcClient.Exception.prototype = new Error();

+

+JSONRpcClient.Exception.prototype.toString =

+function JSONRpcClient_Exception_toString(code, msg)

+{

+    return this.name + ": " + this.message;

+};

+

+

+/* Default top level exception handler */

+

+JSONRpcClient.default_ex_handler =

+function JSONRpcClient_default_ex_handler(e) { alert(e); };

+

+

+/* Client settable variables */

+

+JSONRpcClient.toplevel_ex_handler = JSONRpcClient.default_ex_handler;

+JSONRpcClient.profile_async = false;

+JSONRpcClient.max_req_active = 1;

+JSONRpcClient.requestId = 1;

+

+

+/* JSONRpcClient implementation */

+

+JSONRpcClient.prototype._createMethod =

+function JSONRpcClient_createMethod(methodName)

+{

+    var fn=function()

+    {

+	var args = [];

+	var callback = null;

+	for(var i=0;i<arguments.length;i++) args.push(arguments[i]);

+

+/*	TUSCANY change callback to be last arg instead of first to match binding.ajax

+	if(typeof args[0] == "function") callback = args.shift();

+*/

+	if(typeof args[arguments.length-1] == "function") callback = args.pop();

+

+	var req = fn.client._makeRequest.call(fn.client, fn.methodName,

+					      args, callback);

+	if(callback == null) {

+	    return fn.client._sendRequest.call(fn.client, req);

+	} else {

+	    JSONRpcClient.async_requests.push(req);

+	    JSONRpcClient.kick_async();

+	    return req.requestId;

+	}

+    };

+    fn.client = this;

+    fn.methodName = methodName;

+    return fn;

+};

+

+JSONRpcClient.prototype._addMethods =

+function JSONRpcClient_addMethods(methodNames)

+{

+    for(var i=0; i<methodNames.length; i++) {

+	var obj = this;

+	var names = methodNames[i].split(".");

+	for(var n=0; n<names.length-1; n++) {

+	    var name = names[n];

+	    if(obj[name]) {

+		obj = obj[name];

+	    } else {

+		obj[name]  = new Object();

+		obj = obj[name];

+	    }

+	}

+	var name = names[names.length-1];

+	if(!obj[name]) {

+	    var method = this._createMethod(methodNames[i]);

+	    obj[name] = method;

+	}

+    }

+};

+

+JSONRpcClient._getCharsetFromHeaders =

+function JSONRpcClient_getCharsetFromHeaders(http)

+{

+    try {

+	var contentType = http.getResponseHeader("Content-type");

+	var parts = contentType.split(/\s*;\s*/);

+	for(var i =0; i < parts.length; i++) {

+	    if(parts[i].substring(0, 8) == "charset=")

+		return parts[i].substring(8, parts[i].length);

+	}

+    } catch (e) {}

+    return "UTF-8"; /* default */

+};

+

+/* Async queue globals */

+JSONRpcClient.async_requests = [];

+JSONRpcClient.async_inflight = {};

+JSONRpcClient.async_responses = [];

+JSONRpcClient.async_timeout = null;

+JSONRpcClient.num_req_active = 0;

+

+JSONRpcClient._async_handler =

+function JSONRpcClient_async_handler()

+{

+    JSONRpcClient.async_timeout = null;

+

+    while(JSONRpcClient.async_responses.length > 0) {

+	var res = JSONRpcClient.async_responses.shift();

+	if(res.canceled) continue;

+	if(res.profile) res.profile.dispatch = new Date();

+	try {

+	    res.cb(res.result, res.ex, res.profile);

+	} catch(e) {

+	    JSONRpcClient.toplevel_ex_handler(e);

+	}

+    }

+

+    while(JSONRpcClient.async_requests.length > 0 &&

+	  JSONRpcClient.num_req_active < JSONRpcClient.max_req_active) {

+	var req = JSONRpcClient.async_requests.shift();

+	if(req.canceled) continue;

+	req.client._sendRequest.call(req.client, req);

+    }

+};

+

+JSONRpcClient.kick_async =

+function JSONRpcClient_kick_async()

+{

+    if(JSONRpcClient.async_timeout == null)

+	JSONRpcClient.async_timeout =

+	    setTimeout(JSONRpcClient._async_handler, 0);

+};

+

+JSONRpcClient.cancelRequest =

+function JSONRpcClient_cancelRequest(requestId)

+{

+    /* If it is in flight then mark it as canceled in the inflight map

+       and the XMLHttpRequest callback will discard the reply. */

+    if(JSONRpcClient.async_inflight[requestId]) {

+	JSONRpcClient.async_inflight[requestId].canceled = true;

+	return true;

+    }

+

+    /* If its not in flight yet then we can just mark it as canceled in

+       the the request queue and it will get discarded before being sent. */

+    for(var i in JSONRpcClient.async_requests) {

+	if(JSONRpcClient.async_requests[i].requestId == requestId) {

+	    JSONRpcClient.async_requests[i].canceled = true;

+	    return true;

+	}

+    }

+

+    /* It may have returned from the network and be waiting for its callback

+       to be dispatched, so mark it as canceled in the response queue

+       and the response will get discarded before calling the callback. */

+    for(var i in JSONRpcClient.async_responses) {

+	if(JSONRpcClient.async_responses[i].requestId == requestId) {

+	    JSONRpcClient.async_responses[i].canceled = true;

+	    return true;

+	}

+    }

+

+    return false;

+};

+

+JSONRpcClient.prototype._makeRequest =

+function JSONRpcClient_makeRequest(methodName, args, cb)

+{

+    var req = {};

+    req.client = this;

+    req.requestId = JSONRpcClient.requestId++;

+

+    var obj = {};

+    obj.id = req.requestId;

+    if (this.objectID)

+	obj.method = ".obj#" + this.objectID + "." + methodName;

+    else

+	obj.method = methodName;

+    obj.params = args;

+

+    if (cb) req.cb = cb;

+    if (JSONRpcClient.profile_async)

+	req.profile = { "submit": new Date() };

+    req.data = toJSON(obj);

+

+    return req;

+};

+

+JSONRpcClient.prototype._sendRequest =

+function JSONRpcClient_sendRequest(req)

+{

+    if(req.profile) req.profile.start = new Date();

+

+    /* Get free http object from the pool */

+    var http = JSONRpcClient.poolGetHTTPRequest();

+    JSONRpcClient.num_req_active++;

+

+    /* Send the request */

+    if (typeof(this.user) == "undefined") {

+	http.open("POST", this.serverURL, (req.cb != null));

+    } else {

+	http.open("POST", this.serverURL, (req.cb != null), this.user, this.pass);

+    }

+

+    /* setRequestHeader is missing in Opera 8 Beta */

+    try { http.setRequestHeader("Content-type", "text/plain"); } catch(e) {}

+

+    /* Construct call back if we have one */

+    if(req.cb) {

+	var self = this;

+	http.onreadystatechange = function() {

+	    if(http.readyState == 4) {

+		http.onreadystatechange = function () {};

+		var res = { "cb": req.cb, "result": null, "ex": null};

+		if (req.profile) {

+		    res.profile = req.profile;

+		    res.profile.end = new Date();

+		}

+		try { res.result = self._handleResponse(http); }

+		catch(e) { res.ex = e; }

+		if(!JSONRpcClient.async_inflight[req.requestId].canceled)

+		    JSONRpcClient.async_responses.push(res);

+		delete JSONRpcClient.async_inflight[req.requestId];

+		JSONRpcClient.kick_async();

+	    }

+	};

+    } else {

+	http.onreadystatechange = function() {};

+    }

+

+    JSONRpcClient.async_inflight[req.requestId] = req;

+	

+    try {

+	http.send(req.data);

+    } catch(e) {

+	JSONRpcClient.poolReturnHTTPRequest(http);

+	JSONRpcClient.num_req_active--;

+	throw new JSONRpcClient.Exception

+	    (JSONRpcClient.Exception.CODE_ERR_CLIENT, "Connection failed");

+    }

+

+    if(!req.cb) return this._handleResponse(http);

+};

+

+JSONRpcClient.prototype._handleResponse =

+function JSONRpcClient_handleResponse(http)

+{

+    /* Get the charset */

+    if(!this.charset) {

+	this.charset = JSONRpcClient._getCharsetFromHeaders(http);

+    }

+

+    /* Get request results */

+    var status, statusText, data;

+    try {

+	status = http.status;

+	statusText = http.statusText;

+	data = http.responseText;

+    } catch(e) {

+	JSONRpcClient.poolReturnHTTPRequest(http);

+	JSONRpcClient.num_req_active--;

+	JSONRpcClient.kick_async();

+	throw new JSONRpcClient.Exception

+	    (JSONRpcClient.Exception.CODE_ERR_CLIENT, "Connection failed");

+    }

+

+    /* Return http object to the pool; */

+    JSONRpcClient.poolReturnHTTPRequest(http);

+    JSONRpcClient.num_req_active--;

+

+    /* Unmarshall the response */

+    if(status != 200) {

+	throw new JSONRpcClient.Exception(status, statusText);

+    }

+    var obj;

+    try {

+	eval("obj = " + data);

+    } catch(e) {

+	throw new JSONRpcClient.Exception(550, "error parsing result");

+    }

+    if(obj.error)

+	throw new JSONRpcClient.Exception(obj.error.code, obj.error.msg,

+					  obj.error.trace);

+    var res = obj.result;

+

+    /* Handle CallableProxy */

+    if(res && res.objectID && res.JSONRPCType == "CallableReference")

+	return new JSONRpcClient(this.serverURL, this.user,

+				 this.pass, res.objectID);

+

+    return res;

+};

+

+

+/* XMLHttpRequest wrapper code */

+

+/* XMLHttpRequest pool globals */

+JSONRpcClient.http_spare = [];

+JSONRpcClient.http_max_spare = 8;

+

+JSONRpcClient.poolGetHTTPRequest =

+function JSONRpcClient_pool_getHTTPRequest()

+{

+    if(JSONRpcClient.http_spare.length > 0) {

+	return JSONRpcClient.http_spare.pop();

+    }

+    return JSONRpcClient.getHTTPRequest();

+};

+

+JSONRpcClient.poolReturnHTTPRequest =

+function JSONRpcClient_poolReturnHTTPRequest(http)

+{

+    if(JSONRpcClient.http_spare.length >= JSONRpcClient.http_max_spare)

+	delete http;

+    else

+	JSONRpcClient.http_spare.push(http);

+};

+

+JSONRpcClient.msxmlNames = [ "MSXML2.XMLHTTP.5.0",

+			     "MSXML2.XMLHTTP.4.0",

+			     "MSXML2.XMLHTTP.3.0",

+			     "MSXML2.XMLHTTP",

+			     "Microsoft.XMLHTTP" ];

+

+JSONRpcClient.getHTTPRequest =

+function JSONRpcClient_getHTTPRequest()

+{

+    /* Mozilla XMLHttpRequest */

+    try {

+	JSONRpcClient.httpObjectName = "XMLHttpRequest";

+	return new XMLHttpRequest();

+    } catch(e) {}

+

+    /* Microsoft MSXML ActiveX */

+    for (var i=0;i < JSONRpcClient.msxmlNames.length; i++) {

+	try {

+	    JSONRpcClient.httpObjectName = JSONRpcClient.msxmlNames[i];

+	    return new ActiveXObject(JSONRpcClient.msxmlNames[i]);

+	} catch (e) {}

+    }

+

+    /* None found */

+    JSONRpcClient.httpObjectName = null;

+    throw new JSONRpcClient.Exception(0, "Can't create XMLHttpRequest object");

+};

+