... veryclose to the one obtained after including the unknownobstacle in the data base and starting again the plan-ning [15]. In fact the main penalization due to un-known obstacles is the decreasing ... Department of the Instituteof Technology since 1999. His researchinterests within the Complex SystemsLaboratory of CEMIF concern methodsof processing inaccurate and uncertaindata with application ... theexperimental data without having recourse to any empirical approach. In the case of a partially known environment, a hybrid method is used in order to exploit the advantages of global and localnavigation...
... applications.The latter use ofXML is much discussed and heralded in particular as a great benefit in connectinglegacy applications to modern Web-based applications.Within a Web application, passing ... principle’s successful application can be seen in the use ofXSLT to transform XML into HTML. In most cases, XSLT is used ina Web applica-tion to create a data-driven application process. In ... in data-display tasks, except in two tasks (displayingchat subject categories to a user starting a chat, and displaying the messages ina chat).TransformTagwas so useful that we were able to...
... store!).When a visitor chooses a chat to join, the selection includes both a chat subjectand a chat topic.The chat subject gives the complete path to the correct chat subjectelement in the XML database. ... to touchthe existing scaffolding. Much can be done to change the appearance of the userinterface, while still incorporating the fundamental message communication function-ality that allows ... Selecting Chat SubjectsAs you have read, our implementation began as a system involving many JSP docu-ments, which used custom tags to access an XML data-interface object and an XSLTprocessor. At...
... Chat Subject and Topic■Performing thread synchronization■Synchronizing the XML database■Finding the chat and actor status in Chat■ Rejoining existing chats■Starting a chat■Adding a ... false;boolean actorIsGuestInChat = false;boolean chatExistsForSubjectAndTopic = false;boolean actorRestartingCurrentChat = false;Getting Chat Subject and TopicThe chat subject and topic, chosen by a ... request,which can be associated with a particular destination and bonForumCommandprocessing.That will help create more complex combinations of the bonForum chat logic, bymaking one more variable available...
... sufficientthat the data storage be capable of containing a tree of elements ina hierarchy. Eachelement optionally contains a list of name=valueattribute pairs and can have contentcorresponding to ... source:if(haveSubject && haveTopic) {String fakeChatItem = chatSubject + “_[“;fakeChatItem = fakeChatItem + chatTopic + “]”;// ‘_’ is separator ina chatItem// ‘.’ is separator in pathNameHashtable ... provide accessto the bonForum Web applicationin the manner of a system console, allowing theowner of the application to carry out necessary maintenance and tuning tasks.Notice that the addChildNodeToNonRootNode()method...
... place it as a JAR file in the TOMCAT_HOME\lib folder. A JSP container, such as Tomcat, canalso use tag libraries by finding the appropriate implementing classes in its default orother class ... TagAttributeInfo,TagData,TagExtraInfo,TagInfo,TagLibraryInfo, andVariableInfo.The doStartTag( ) MethodImplementing the Taginterface implies defining a doStartTag()method. A tag ... is a mechanism of choice in the nested-tag arsenal of the JSPtaglib API:ConnectionTag connectionTag = (ConnectionTag) TagSupport.findAncestorWithClass(➥this, org.apache.taglibs.sql.ConnectionTag.class...
... Note that if you have Xalan-Java-2,you can also set xalanVersionto Xalan Java 1, as long as the compatibility JAR fileis accessible, for example, as TOMCAT_HOME\lib\xalanj1compat.jar.Let’s ... Xalan1Transformerclass,which encapsulates the steps necessary to carry out an XSLT process using the Xalan-Java 1 processor from the Apache XML project.package de.tarent.forum;import java.text.*;import ... XSLT couldwait until later to display a list of available chats. In the original XML-based design, connections between data items were maintainedby matching key values in related elements.The connection...
... their source code, as well as Chapter 8.The addNode() Method’s nodeKeyHashtable Cache In the ForestHashtableclass, the public classes that add data nodes all call a privateclass called addNode().The ... bonForumcontains actors,actions, and thingsnodes. At initialization, one child of actors, called system, is added. A bonForum’sXML database also contains initially a list of links to ... searchthrough a much smaller data set that is guaranteed to contain all the new child nodesthat we must find instead of making many new requests from a database.Climbing Up the Hierarchy In...
... the database. Using a DataGrid Control to Access a Database A DataGrid allows you to access rows ina database table. In the following sections, you'll learn how to create an ASP.NET ... information about a user or the application. Finally, you can of course always store information in static variables or objects. You'll learn about the Session, Application, and Cache objects ... your form. (Adding a SqlConnection object to a form was discussed in Chapter 6, "Introducing Windows Applications and ADO.NET," and in Chapter 7, "Connecting to a Database.")...
... prepared before they can participate in an automatic transaction. Once an object is marked to participate ina transaction, it will automatically execute within a transaction. The object's ... be configured programmatically to participate automatically in an existing transaction, to start a new transaction, or to not participate ina transaction. The following steps prepare a class ... automatic transaction, the objects participating in it can vote to either commit the transaction they are participating in by calling the static SetComplete( ) method of the ContextUtil class or...
... 1. always warn user and ask again for new subjectand/or new topic// 2 if actor was in it, always join with previousstatus, else warn and ask again// 3. if actor was in it, always join as ... warnand ask again// All these choices can be modified reactorRestartingCurrentChat value// For now, we implement choice #2if(actorIsHostInChat) {bonForumCommand = “host_executes_chat”;actorWillRejoinChat ... taken:session.setAttribute(“actorNicknameNotAvailable”,actorNickname);// nickname choice is not unique,disallow it:actorNickname = “”;log(sessionId, “err”,“actorNickname rejected asduplicate:” +actorNickname);}else...