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<?xml version="1.0"?> <!-- Copyright 1999-2004 The Apache Software Foundation 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. --> <xsp:page language="java" xmlns:xsp="http://apache.org/xsp" xmlns:esql="http://apache.org/cocoon/SQL/v2" xmlns:xsp-request="http://apache.org/xsp/request/2.0" > <xsp:structure> <xsp:include>java.util.Enumeration</xsp:include> </xsp:structure> <page> <resources> <resource type="file" href="database.xml?cocoon-view=pretty-content">Descriptor</resource> <resource type="file" href="schema.sql">Schema</resource> <resource type="doc" href="userdocs/actions/database-actions.html">Actions</resource> <resource type="doc" href="userdocs/xsp/esql.html">ESQL</resource> </resources> <title>user-list</title> <content> <h1>Modular Database Actions</h1> <hr/> <p>The intention is to factor out those parts that are dependent on the utilised DBMS as well as the methods used to obtain the values and communicate results. Therefore three classes of modules exist:</p> <ol> <li>Input Modules read data from some source (e.g. the request object or session attributes or whatever)</li> <li>Output Modules send the data to an arbitrary destination. Again, this could be request attributes or anything else. When the database transaction finishes, it is signalled to them whether the transaction succeeded or failed.</li> <li>Database Modules determine the value of a key attribute column in a database if it's is of auto increment type. This could be by querying the database, reading from an arbitrary source (e.g. request object) or just skipping the column when inserting a row and querying the database afterwards. This needs to be done e.g. for Informix's SERIAL or HSQLDB's IDENTITY column types.</li> </ol> <hr/> <h2>Current database content</h2> <esql:connection> <esql:pool>personnel</esql:pool> <p> <sqltbl> <esql:execute-query> <esql:query>select * from user order by name, firstname, uname, uid</esql:query> <esql:results> <esql:row-results> <sqltblrow> <name> <esql:get-string column="name"/> </name> <firstname> <esql:get-string column="firstname"/> </firstname> <uname> <esql:get-string column="uname"/> </uname> <action> <form action="edit-groups"> <input type="hidden" name="user.uid"> <xsp:attribute name="value"><esql:get-string column="uid"/></xsp:attribute> </input> <input type="submit" name="edit-user" value="edit"/> </form> <form> <input type="hidden" name="user.uid"> <xsp:attribute name="value"><esql:get-string column="uid"/></xsp:attribute> </input> <input type="submit" name="del-user" value="delete"/> </form> </action> </sqltblrow> </esql:row-results> </esql:results> <esql:error-results> <error><esql:get-message/></error> </esql:error-results> </esql:execute-query> <form method="Get"> <sqltblrow> <name> <input type="text" name="user.name" size="20" maxsize="20"> <xsp:attribute name="value"><!-- <xsp-request:get-parameter default="" name="user.name"/> --></xsp:attribute> </input> </name> <firstname> <input type="text" name="user.firstname" size="20" maxsize="20"> <xsp:attribute name="value"><!-- <xsp-request:get-parameter default="" name="user.firstname"/> --></xsp:attribute> </input> </firstname> <uname> <input type="text" name="user.uname" size="20" maxsize="20"> <xsp:attribute name="value"><!-- <xsp-request:get-parameter default="" name="user.uname"/> --></xsp:attribute> </input> </uname> <action> <select multiple="1" name="user_groups.gid" size="4"> <esql:execute-query> <esql:query>select gid, gname from groups order by gname</esql:query> <esql:results> <esql:row-results> <option> <xsp:attribute name="value"><esql:get-string column="gid"/></xsp:attribute> <esql:get-string column="gname"/> </option> </esql:row-results> </esql:results> </esql:execute-query> </select> <input type="submit" name="add-user-groups" value="new user"/> </action> </sqltblrow> </form> </sqltbl> </p> <p> <sqltbl> <esql:execute-query> <esql:query>select * from groups order by gname</esql:query> <esql:results> <esql:row-results> <form> <sqltblrow> <gname> <input type="text" name="groups.gname"> <xsp:attribute name="value"><esql:get-string column="gname"/></xsp:attribute> </input> <input type="hidden" name="groups.gid"> <xsp:attribute name="value"><esql:get-string column="gid"/></xsp:attribute> </input> <input type="submit" name="upd-group" value="update"/> <input type="submit" name="del-group" value="delete"/> </gname> </sqltblrow> </form> </esql:row-results> </esql:results> <esql:error-results> <error><esql:get-message/></error> </esql:error-results> </esql:execute-query> <sqltblrow> <gname> <form> <input type="text" name="groups.gname" size="20" maxsize="20"> <xsp:attribute name="value"><!-- <xsp-request:get-parameter default="" name="groups.gname"/> --></xsp:attribute> </input> <input type="submit" name="add-group" value="new group"/> </form> </gname> </sqltblrow> </sqltbl> </p> <p> <form> <esql:execute-query> <esql:query>select user.uid, user.uname, groups.gid, groups.gname from user, user_groups, groups where user.uid=user_groups.uid and user_groups.gid=groups.gid order by user.uname, groups.gname</esql:query> <esql:results> <sqltbl> <esql:row-results> <form action="edit-groups"> <sqltblrow> <uname> <input type="hidden" name="user.uid"> <xsp:attribute name="value"><esql:get-string column="uid"/></xsp:attribute> </input> <esql:get-string column="uname"/> </uname> <gname><esql:get-string column="gname"/></gname> <action> <input value="edit groups" type="submit"/> </action> </sqltblrow> </form> </esql:row-results> </sqltbl> </esql:results> <esql:error-results> <error><esql:get-message/></error> </esql:error-results> </esql:execute-query> </form> </p> </esql:connection> <hr/> <p><h2>Status Information</h2></p> <p><h3>Request Attributes</h3></p> <p> <table border="0"> <tbody> <xsp:logic>{ Enumeration e=request.getAttributeNames(); while ( e.hasMoreElements() ) { String attribute = (String) e.nextElement(); Object value = request.getAttribute(attribute); <tr> <td align="right"><xsp:expr>attribute</xsp:expr></td> <td>="<xsp:expr>value</xsp:expr>"</td> </tr> } }</xsp:logic> </tbody> </table> </p> <p><h3>Request Parameters</h3></p> <p> <table border="0"> <tbody> <xsp:logic>{ Enumeration e=request.getParameterNames(); while ( e.hasMoreElements() ) { String attribute = (String) e.nextElement(); Object[] value = request.getParameterValues(attribute); for (int i=0; i < value.length; i++) { <tr> <td align="right"><xsp:expr>attribute</xsp:expr>[<xsp:expr>i</xsp:expr>]</td> <td>="<xsp:expr>value[i]</xsp:expr>"</td> </tr> } } }</xsp:logic> </tbody> </table><br/> </p> <hr/> </content> </page> </xsp:page> 
