Activation Context (1)

A page render request activates a page. A page render request can include parameters, which Tapestry calls the activation context.

To specify an activation context in a PageLink, use the context parameter. Here we have specified context="personId":
Show Person 1
Click the link above to learn more.

References: PageLink, Page Render Requests, Page Activation, Grammar, Binding Expressions.

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<!-- We need a doctype to allow us to use special characters like &nbsp; 
     We use a "strict" DTD to make IE follow the alignment rules. -->
     
<html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_4.xsd">
<body class="container">
    <h3>Activation Context (1)</h3>

    A <strong>page render request</strong> activates a page. 
    A page render request can include parameters, which Tapestry calls the <strong>activation context</strong>.<br/><br/>
    
    To specify an activation context in a PageLink, use the <code>context</code> parameter. 
    Here we have specified <code>context="personId"</code>:
    
    <div class="eg">
        <t:pagelink page="examples/navigation/ActivationContext2" context="personId">Show Person ${personId}</t:pagelink><br/>
    </div>
    
    Click the link above to learn more.<br/><br/>
    
    References: 
    <a href="http://tapestry.apache.org/5.4/apidocs/org/apache/tapestry5/corelib/components/PageLink.html">PageLink</a>, 
    <a href="http://tapestry.apache.org/page-navigation.html#PageNavigation-PageRenderRequests">Page Render Requests</a>, 
    <a href="http://tapestry.apache.org/page-navigation.html#PageNavigation-Pageactivation">Page Activation</a>, 
    <a href="http://tapestry.apache.org/property-expressions.html#PropertyExpressions-Grammar">Grammar</a>, 
    <a href="http://tapestry.apache.org/component-parameters.html#ComponentParameters-BindingExpressions">Binding Expressions</a>.<br/><br/>

    <t:pagelink t:page="Index">Home</t:pagelink><br/><br/>
    
    <t:tabgroup>
        <t:sourcecodetab src="/web/src/main/java/jumpstart/web/pages/examples/navigation/ActivationContext1.tml"/>
        <t:sourcecodetab src="/web/src/main/java/jumpstart/web/pages/examples/navigation/ActivationContext1.java"/>
        <t:sourcecodetab src="/web/src/main/resources/META-INF/assets/css/examples/olive.css"/>
    </t:tabgroup>
</body>
</html>



package jumpstart.web.pages.examples.navigation;

import org.apache.tapestry5.annotations.Import;
import org.apache.tapestry5.annotations.Property;

@Import(stylesheet = "css/examples/olive.css")
public class ActivationContext1 {

    @Property
    private Long personId;

    void setupRender() {
        personId = new Long(1);
    }

}



.eg {
                margin: 20px 0;
                padding: 14px;
                color: olive;
                border: 1px solid #ddd;
                border-radius: 6px;
                -webkit-border-radius: 6px;
                -mox-border-radius: 6px;
}