Passing Data Between Pages: by Activation Context

You asked for person 1.

Return
This page used the activation context to save its data through the redirection. The data became part of the URL so the page can be bookmarked.

This technique is usually employed to pass an identifier, eg. personId, but it is not limited to one parameter (see the More Parameters and Variable Parameters examples).

References: Page Render Requests.

Home


<!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>Passing Data Between Pages: by Activation Context</h3>

    <div class="eg">
        <p>You asked for person ${personId}.</p>
        <t:pagelink page="examples/state/PassingDataBetweenPages">Return</t:pagelink>
    </div>
    
    This page used the <strong>activation context</strong> to save its data through the redirection. 
    The data became part of the URL so the page can be bookmarked.<br/><br/>

    This technique is usually employed to pass an <strong>identifier</strong>, eg. personId, 
    but it is not limited to one parameter (see the More Parameters and Variable Parameters examples).<br/><br/>

    References:  
    <a href="http://tapestry.apache.org/page-navigation.html#PageNavigation-PageRenderRequests">Page Render Requests</a>.<br/><br/>

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



package jumpstart.web.pages.examples.state;

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

/**
 * This page demonstrates using the activation context to remember data through the redirect.
 * The data will be appended to the page render request URL.
 */
@Import(stylesheet="css/examples/olive.css")
public class PassingByActivationContext {

    // The activation context

    @Property
    private long personId;

    // The code
    
    // set() is public so that other pages can use it to set up this page.
    
    public void set(Long personId) {
        this.personId = personId;
    }
    
    // onActivate() is called by Tapestry to pass in the activation context from the URL.

    void onActivate(Long personId) {
        this.personId = personId;
    }

    // onPassivate() is called by Tapestry to get the activation context to put in the URL.
    // To return more than one parameter, use Long[], or List<Long>, or Object[], or List<Object>.
    
    Long onPassivate() {
        return personId;
    }
}



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