Another Middleware Blog

Friday, September 11, 2015

2>&1

Have you asked yourself what 2>&1 means in a shell script? It means that 2 (stderr) is redirected to 1 (stdout). If you combine it with a redirect to /dev/null that line does not display any output or error messages. Example: apt-get update > /dev/null 2>&1

Monday, August 10, 2015

Embedding Oracle Documents Cloud Service UI In Custom Web Pages

Introduction

With Oracle Documents Cloud Service we have the possibility to embed the user interface of Documents Cloud Service in other web pages by simply using an HTML iframe tag. This is the simplest way to integrate with Oracle Documents Cloud Service and to do this you have to follow few simple steps. Note that this integration removes the default branding from interface and dimension parameters of the interface are dictated by the attributes of the iframe.

Enable the embedded content

In the Administration interface of Oracle Documents Cloud Service go to Embedded Content section. A switch allows you to enable or disable content from Oracle Documents within other domains. Also you have to specify the domain and port and if you enable CAPTCHA and Safe Mode. We will come back to these features a little later.

Oracle Documents Cloud Service Administration Interface

For this simple tutorial I used wildcards for the domain name and port and this is not safe. Please use your actual domain name and actual port for your web application.

Define the IFRAME URL

Next step is to identify the URL for the iframe src attribute. If your URL for the service is:

http://<tennant-info>.oraclecloud.com/documents/home/nameasc

the URL for embedded UI will be:

http://<tennant-info>.oraclecloud.com/embed/documents/home/nameasc.

Replace the <tenant-information> with corresponding section form the URLyou’re your Oracle Documents Cloud subscription. Notice that we added “embed” before “documents” in the URL. You can also start with a specific folder but for this you will have to specify the GUID of the folder. In this case the URL will look like:

http://<tennant-information>.oraclecloud.com/embed/folder/<GUID>

Integrate IFRAME in WebPage

I wrote a very simple HTML page (test1.html) that displays the Oracle Documents web interface:

<!DOCTYPE html>

<html>

<body>

width="800" height="600"/>

</body>

</html>

The page was deployed to a web server and final step, testing. Be sure that you disabled pop-up blocker for your page first because a pop-up will be used for authentication.

and here are your files:

Now you can start dragging and dropping files in your folders.

Finally, notice the difference between the embedded interface and standard interface. In the right corner of the embedded interface we have the "Open in Oracle Documents" button (see above image) . This button allows you to switch between the embedded interface and standard web interface of the service.

A final word about enabling CAPTHCA and Safe Mode.

You can enable CAPTCHA to allow only users and restrict access of scripts to your Oracle Documents Cloud Service content. You do this An embedded page with CAPTCHA enabled looks like:

Safe Mode prevents users for performing dangerous actions like copying or moving content in public folders, changing the status of public links (share/unshared content) and deleting permanently files of folders. A user can move a folder or file in trash folder.

Tuesday, March 17, 2015

Multicast over TCP/IP and Java Multicast Sockets

Wednesday, January 14, 2015

Alternative to SitesExplorer on Mac OS X

Use HSQL Database Manager. For example: Oracle Webcenter Sites Jump Start Kit is installed in user’s home Library directory (~/Library/Oracle/JSK/11.1.1.8.0.app). The HSQL Database manager is available from hsqldb.jar available in:

~/Library/Oracle/JSK/11.1.1.8.0.app/App_Server/apache-tomcat-7.0.42/Sites/lib.

From Sites directory launch Database Manager using the command:

$java –cp ./hsqldb.jar org.hsqldb.util.DatabaseManagerSwing

In the Database Manager use the following connection parameters:

Type: HSQL Database Engine In-Memory
Driver: org.hsqldb.jdbcDriver
URL: jdbc:hsqldb:file:./default/data/hypersonic/csDB
User: SA

SQL instructions can be used in order to view and manipulate data from JSK HSQL database.

Thursday, November 20, 2014

Spring-Boot - Jump-Start Spring Application Development

The Spring-Boot project (more information available here) provides a quick and elegant way to start with Spring application development.

Tuesday, November 4, 2014

Oracle MAF – WebCenter Sites Integration

Inspired by Yannik article from here I tried to achieve the same kind of integration but between WebCenter Sites and Oracle MAF using custom MAF components.

Using a simple set of flex assets and three templates (main layout template, template for article and image template) the content is generated and displayed in the MAF application using a custom JavaScript component.

Layout template is calling the article (Demo_C asset) Detail template which is also calling the detail template for image (Demo_M asset):

<%@ taglib prefix="cs" uri="futuretense_cs/ftcs1_0.tld"

%><%@ taglib prefix="asset" uri="futuretense_cs/asset.tld"

%><%@ taglib prefix="assetset" uri="futuretense_cs/assetset.tld"

%><%@ taglib prefix="commercecontext" uri="futuretense_cs/commercecontext.tld"

%><%@ taglib prefix="ics" uri="futuretense_cs/ics.tld"

%><%@ taglib prefix="listobject" uri="futuretense_cs/listobject.tld"

%><%@ taglib prefix="render" uri="futuretense_cs/render.tld"

%><%@ taglib prefix="siteplan" uri="futuretense_cs/siteplan.tld"

%><%@ taglib prefix="searchstate" uri="futuretense_cs/searchstate.tld"

%><%@ page import="COM.FutureTense.Interfaces.*,

COM.FutureTense.Util.ftMessage,

com.fatwire.assetapi.data.*,

com.fatwire.assetapi.*,

COM.FutureTense.Util.ftErrors"

%><cs:ftcs>

<%-- Record dependencies for the Template --%>

<ics:if condition='<%=ics.GetVar("tid")!=null%>'><ics:then><render:logdep cid='<%=ics.GetVar("tid")%>' c="Template"/></ics:then></ics:if>

<!DOCTYPE html>

<head>

<title>WebCenter Sites Demo</title>

</head>

<body>

<%-- <render:callelement elementname="/Common/Navigation/TopNav"/>--%>

<render:calltemplate tname="Detail" c='<%=ics.GetVar("c") %>'

cid='<%=ics.GetVar("cid") %>'

tid='<%=ics.GetVar("tid") %>'>

</render:calltemplate>

<%--<render:callelement elementname="/Common/Navigation/Footer"/> --%>

$(function(){

$('.collapse').collapse();

});

</script>

</body>

</html>

</cs:ftcs>

The custom component is named wcsEmbed and is stored in the file demo1.js:

(function(){

try {

var wcsEmbed = adf.mf.api.amx.TypeHandler.register("http://xmlns.example.com/wcs", "wcsEmbed");

wcsEmbed.prototype.render = function(amxNode, id) {

var rootElement = document.createElement("div");

var c = amxNode.getAttribute("c");

var cid = amxNode.getAttribute("cid");

var pagename = amxNode.getAttribute("pagename");

var pageUrl = "http://localhost:9080/cs/Satellite?c=" + c + "&pagename=" + pagename + "&cid=" + cid;

rootElement.innerHTML = "<iframe id='f1' scrolling='auto' width='100%' height='100%' src='" + pageUrl +"'/>";

//rootElement.innerHTML ="<h1>Hello world!</h1>";

return rootElement;

}

catch (problem) {

alert("Error displaying the URL:" + pageUrl);

}

})();

In the AMX view we are calling the custom components with the parameters that are identifiying the asset: c, cid and pagename:

<?xml version="1.0" encoding="UTF-8" ?>

<amx:view xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:amx="http://xmlns.oracle.com/adf/mf/amx"

xmlns:dvtm="http://xmlns.oracle.com/adf/mf/amx/dvt"

xmlns:wcs="http://xmlns.example.com/wcs">

<amx:panelPage id="pp1">

<amx:facet name="header">

<amx:outputText value="Sites Demo" id="ot1"/>

</amx:facet>

<amx:facet name="primary">

<amx:commandButton id="cb1" text="Back" action="__back"/>

</amx:facet>

<wcs:wcsEmbed id="em1" c="#{bindings.c.inputValue}"

cid="#{bindings.cid.inputValue}"

pagename="#{bindings.pagename.inputValue}" />

</amx:panelPage>

</amx:view>

A couple of things to mention:

- The js and css files for custom components must be associated with the feature.

- Because we are calling a remote URL, in the maf-application.xml, in the security section, the URLs must be whitelisted. For convenience and for this demo only, I whitelisted everything that is coming over http.

The end-result of this application in iOS simulator:

Wednesday, July 9, 2014

Using Flex Assets in Templates and CSElements

Let’s assume that we want to use a FlexAsset in a template and we don’t have access to the id of the asset but only to the value of an attribute of the asset.

We will use the Demo_M (DemoImage) asset type with the definition “DemoImageDefinition”

The attributes used in this definition are file and thumbnail of type BLOB and title, altText and description of type string, string and text.

We have a number of assets of this type and that are using the same definition:

The goal of this tutorial is to access the DemoImage assets using as the identifier for the asset the value of an attribute, let’s say title.

First we need to create a searchstate object:

<%-- Create a searchstate --%>

<searchstate:create name="img_title" />

To narrow the result set we have to provide a constraint for searchstate. We do this by adding a constraint:

<searchstate:addsimplestandardconstraint name="img_title" attribute="title" value="Earth" typename="Demo_A"/>

Next step is to create and assetset using searchstate:

<assetset:setsearchedassets name="imgByTitle" assettypes="Demo_M" constraint="img_title" fixedlist="true"/>

Retrive the wanted attribute (altText for this example):

<assetset:getattributevalues name="imgByTitle" listvarname="altTextList" attribute="altText" typename="Demo_A"/>

Display the attribute value:

<p>Alt text for Earth image is: <ics:listget fieldname="value" listname="altTextList"/></p>

If the attribute has multiple values (like the description attribute):

<assetset:getattributevalues name="imgByTitle" listvarname="descList" attribute="description" typename="Demo_A"/>

<p>

Description:<br/>

<ics:listloop listname="descList">

<ics:listget fieldname="value" listname="descList"/><br/>

</ics:listloop>

</p>

To get the values from asset type primary table (like id, name, etc…) we can use asset:search tag:

<ics:setvar name="prefix:name_op" value="="/>

<ics:setvar name="prefix:name" value="earth"/>

<asset:search prefix="prefix" list="earthAttributes" type="Demo_M"/>

<ics:listloop listname="earthAttributes">

<ics:listget listname="earthAttributes" fieldname="id"/>----

<ics:listget listname="earthAttributes" fieldname="name"/>

</ics:listloop>

</cs:ftcs>

The result of the execution of the template: