... the data from the data table into an XML document. Creating the Data Table Rather than using a DataAdapter object to create and populate the data table from live data, the code will create ... DataTable.Columns Add Adds the current DataColumn object to the collection of columns in the data table. DataTable NewRow Creates a DataRow object. DataRow Item(ColumnName) Replaces data in ... I create an XMLdocument with it? Technique The XMLWriter provides a quick way to generate streams or files that contain XML data. The stream is not cached; it is forward-only. The XML data...
... Login Name and Password. It will then check against a table that you will create of names, passwords, and security levels. The method you will create first will then pass back True or False ... I createa Web Service that uses parameters? Technique For this How-To, you are going to create the start of a security Web Service. This security Web Service is going to take in two parameters: ... descriptions to the Web Service. 13.2 Createa Simple XML Web Service Using Parameters I have seen how to createa Web Service using the sample that Microsoft provides. This was instructive...
... applications.The latter use of XML is much discussed and heralded in particular as a great benefit in connectinglegacy applications to modern Web-based applications.Within a Web application, passing ... what the data looks like as an XML document. You can find a more complete version of some similar XML data in Chapter 11, XML Data Storage Class: ForestHashtable.”That chapter also gives youmany ... In other words, wewanted to have a way to create events that would change the content of the XML data.bonForumActorshostguestactorNickNameactorNickNameActionsstartsjoinschatKeychatKeyThingsSubjectschataardvarkszylophonesSubjectKeyHostKeyGuestKeyMessageKeyMessageHostKeyFigure...
... 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. ... 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 ... 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...
... 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...
... ForestHashtable)nInitializes the XML database for use as a chat Web appnLoads XML files into a database using its methodsnDumps the content of the database as XMLina stringnProvides access to the database ... source:if(haveSubject && haveTopic) {String fakeChatItem = chatSubject + “_[“;fakeChatItem = fakeChatItem + chatTopic + “]”;// ‘_’ is separator ina chatItem// ‘.’ is separator in pathNameHashtable ... topic.2. If the actor was in the chat, always join it with the previous status; otherwise,warn and ask again.3. If the actor was in the chat, always join as a guest; otherwise, warn and ask again.08...
... JSP container. A tag library can be pack-aged ina JAR file, as the following definition explains. It comes from the document type definition for a tag library descriptor: A tag library is a JAR ... 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...
... 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 ... exciting things about working with JavaServer Pagesis that you can quickly and very interactively develop Java methods by scripting Javacode directly in the JSP document. The Tomcat Server automatically ... 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 ... 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 ... getChildNodeFromAttributeValue()Again, because ina ForestHashtablechildren have a value of nodeKey.bKeyequal tothe parent’s nodeKey.aKey, we can iterate the children of a node to find one child thathas a certain attribute...
... 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 ... names in the cache,// it will nevertheless cache them, and cache them, andcache them! Filling the cache with them!//uncachedDocument = document + millis + “.tfe”;System.out.println(“Created...