Wicket Sessionを使う

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Wicket 表を作るで、呪文を唱えるたびに MP が減っていくようにしたい

Session Object
ユーザへの Session Object の割り付け
WebPageからの使い方
- RecitePage.java
- RecitePage.html
スクリーンショット

Session Object †

package com.snail.wicket.exam;

import org.apache.wicket.Request;
import org.apache.wicket.protocol.http.WebSession;

public final class MySession extends WebSession {

  private static final long serialVersionUID = -1354773246805396494L;
  
  private int magicPoint;
  
  public MySession(Request request) {
    super(request);
    magicPoint = 100;
  }

  public int getMagicPoint() {
    return magicPoint;
  }

  public void setMagicPoint(int magicPoint) {
    this.magicPoint = magicPoint;
  }

}

Wicketでは、Session で持ち回る情報は、WebSession? を継承したクラスに格納する
コンストラクタは、MySession?(Request)

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ユーザへの Session Object の割り付け †

package com.snail.wicket.exam;

import org.apache.wicket.Request;
import org.apache.wicket.Response;
import org.apache.wicket.Session;
import org.apache.wicket.protocol.http.WebApplication;

public class WicketApplication extends WebApplication {

  public WicketApplication() {
    super();
  }

  @SuppressWarnings("unchecked")
  @Override
  public Class getHomePage() {
    return MenuPage.class;
  }
  
  @Override
  public Session newSession(Request req,Response res){
	return new MySession(req);
  }
}

Session Object をユーザ(ブラウザのCookie) に割り付けるには、WebApplication?#newSession(req,res) を Override する
WebApplication? は、Wicket アプリケーションで一番最初に動くクラス
- cf.Wicket Quick Start は、どう動いているのか？

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WebPage?からの使い方 †

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RecitePage?.java †

package com.snail.wicket.exam.list;

import com.snail.wicket.exam.MySession;

import org.apache.wicket.markup.html.WebPage;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.form.Button;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.panel.FeedbackPanel;
import org.apache.wicket.model.CompoundPropertyModel;

public class RecitePage extends WebPage {
  private static final long serialVersionUID = -2267116207092439035L;

  private FeedbackPanel feedback = new FeedbackPanel("msg");
  private MagicVO magic;

  public RecitePage(MagicVO pMagic) {
    add(feedback);

    magic = pMagic;

    Form form = new Form("f", new CompoundPropertyModel(magic));
    add(form);

    form.add(new Label(MagicVO.NAME_COL));
    form.add(new Label(MagicVO.EFFECT_COL));
    form.add(new Label(MagicVO.MP_COL));

    final MySession session = (MySession) getSession();
    form.add(new Label("rem",
        Integer.toString(session.getMagicPoint())));

    form.add(new Button("cancel") {
        @Override
        public void onSubmit() {
          setResponsePage(new ListPage());
        }
      });

    form.add(new Button("sure") {
        @Override
        public void onSubmit() {
          int useMP = Integer.parseInt(magic.getMp());
          int remMP = session.getMagicPoint();

          if (remMP < useMP) {
            error("MP is lacking to put " + magic.getName()
              + "in motion.");
          } else {
            session.setMagicPoint(remMP - useMP);
            setResponsePage(new ListPage());
          }
        }
      });
  }
}

WebPage?#getSession() で、Session Object を取得可能

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RecitePage?.html †

<?xml version="1.0" encoding="UTF-8"?>
<html
  xmlns="http://www.w3.org/1999/xhtml"
  xmlns:wicket="http://wicket.apache.org/">
<head>
<title>Result Page</title>
</head>
<body>

Are you sure you recite this magic? <br/>
<span wicket:id="msg"> error message will be here </span>
<form wicket:id="f">
  Name: <span wicket:id="name">Name will be here</span><br/>
  Effect: <span wicket:id="effect">Effect will be here</span><br/>
  Use MP: <span wicket:id="mp">Magic Point will be here</span><br/>
  Remains MP: <span wicket:id="rem">Remains Magic Point will be here</span><br/>
  <input type="submit" wicket:id="sure" value="sure"/>
  <input type="submit" wicket:id="cancel" value="cancel"/>
</form>

</body>
</html>