サーバサイドの構築 2
6．各種設定ファイル（applicationContext.xml、web.xml、curl-access.txt）の設定
Spring Frameworkの設定ファイル“applicationContext.xml”をWEB-INFディレクトリ配下に追加し、Spring Frameworkを利用するため、web.xmlを修正します。また、Curlのアクセス制御ファイル“curl-access.txt”をwarディレクトリ配下に追加します。
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/jee
http://www.springframework.org/schema/jee/spring-jee-2.5.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
<context:component-scan base-package="memo"/>
</beans>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<!-- InvokeApplicationContextServlet -->
<servlet>
<servlet-name>InvokeApplicationContextServlet</servlet-name>
<servlet-class>com.curlap.orb.servlet.InvokeApplicationContextServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>InvokeApplicationContextServlet</servlet-name>
<url-pattern>/invoke-application-context</url-pattern>
</servlet-mapping>
<!-- NewInstanceServlet -->
<servlet>
<servlet-name>NewInstanceServlet</servlet-name>
<servlet-class>com.curlap.orb.servlet.NewInstanceServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>NewInstanceServlet</servlet-name>
<url-pattern>/new-instance</url-pattern>
</servlet-mapping>
<!-- InvokeHttpSessionServlet -->
<servlet>
<servlet-name>InvokeHttpSessionServlet</servlet-name>
<servlet-class>com.curlap.orb.servlet.InvokeHttpSessionServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>InvokeHttpSessionServlet</servlet-name>
<url-pattern>/invoke-http-session</url-pattern>
</servlet-mapping>
<!-- DestroyInstanceServlet -->
<servlet>
<servlet-name>DestroyInstanceServlet</servlet-name>
<servlet-class>com.curlap.orb.servlet.DestroyInstanceServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DestroyInstanceServlet</servlet-name>
<url-pattern>/destroy-instance</url-pattern>
</servlet-mapping>
<!-- DefaultFilter -->
<filter>
<filter-name>DefaultFilter</filter-name>
<filter-class>com.curlap.orb.servlet.DefaultInstanceManagementFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>DefaultFilter</filter-name>
<!-- <url-pattern>/*</url-pattern> -->
<url-pattern>/invoke-application-context</url-pattern>
<url-pattern>/new-instance</url-pattern>
<url-pattern>/invoke-http-session</url-pattern>
<url-pattern>/destroy-instance</url-pattern>
</filter-mapping>
<!--
Curl ORB - Environment - (since 0.6)
default: none
- none (none security)
- development
- test
- production
-->
<context-param>
<param-name>com.curlap.orb.environment</param-name>
<param-value>development</param-value>
</context-param>
<!--
Curl ORB - DI container integration - (since 0.6)
default: com.curlap.orb.context.ServletApplicationContext
- spring : com.curlap.orb.context.Spring2_5ApplicationContext
- seasar2: com.curlap.orb.context.Seasar2ApplicationContext
-->
<context-param>
<param-name>com.curlap.orb.applicationContextClass</param-name>
<param-value>com.curlap.orb.context.Spring2_5ApplicationContext</param-value>
</context-param>
<!-- Listener for Spring framework -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>
<!--
Curl ORB - filter of generator - (since 0.6)
NOTE: It is enabled when this environment is development.
-->
<context-param>
<param-name>com.curlap.orb.generator.filter</param-name>
<param-value>org.apache.commons.,org.springframework.,org.seasar.,ognl.,org.aopalliance.,junit.,org.datanucleus.</param-value>
</context-param>
</web-app>
curl-access.txt
# curl-access.txt for an Internet Web site version: 2.0 allow-all:
7．Google App EngineのDataStore機能を利用したサービス作成
ここでは、DataStoreを操作するため、JDO（Java Data Objects）、JPA（Java Persistence API）を利用して、ストレージに書き込む機能・読み込む機能・削除する機能を作成します。
まず、データクラスであるMemoクラスとサービスクラスであるMemoServiceインターフェース、MemoServiceImplクラスを作成します。
Memo.java
package memo;
import java.util.Date;
import javax.jdo.annotations.IdGeneratorStrategy;
import javax.jdo.annotations.IdentityType;
import javax.jdo.annotations.PersistenceCapable;
import javax.jdo.annotations.Persistent;
import javax.jdo.annotations.PrimaryKey;
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Memo {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Long id;
@Persistent
private String name;
@Persistent
private String message;
@Persistent
private Date date;
public Long getId() {
return id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
/* NOTE: ORB needs the constructor of no arguments. */
public Memo() {
// do nothing
}
public Memo(String name, String message, Date date) {
this.name = name;
this.message = message;
this.date = date;
}
}
MemoService.java
package memo;
import java.util.List;
public interface MemoService {
public List<Memo> getMemos();
public void registerMemo(Memo memo);
public void removeMemo(Long id);
}
MemoServiceImpl.java
package memo.impl;
import java.util.List;
import javax.jdo.PersistenceManager;
import memo.Memo;
import memo.MemoService;
import org.springframework.stereotype.Service;
import com.curlap.orb.security.RemoteService;
import common.PMF;
@RemoteService
@Service("memoService")
public class MemoServiceImpl implements MemoService {
@SuppressWarnings("unchecked")
@Override
public List<Memo> getMemos() {
PersistenceManager pm = PMF.get().getPersistenceManager();
String query = "select from " + Memo.class.getName();
List<Memo> memos = (List<Memo>) pm.newQuery(query).execute();
return memos;
}
@Override
public void registerMemo(Memo memo) {
PersistenceManager pm = PMF.get().getPersistenceManager();
try {
pm.makePersistent(new Memo(memo.getName(), memo.getMessage(), memo.getDate()));
} finally {
if (!pm.isClosed())
pm.close();
}
}
@Override
public void removeMemo(Long id) {
PersistenceManager pm = PMF.get().getPersistenceManager();
try {
pm.deletePersistent(pm.getObjectById(Memo.class, id));
} finally {
if (!pm.isClosed())
pm.close();
}
}
}
また、PersistenceManagerFactoryのユーティリティPMFも作成します。
PMF.java
package common;
import javax.jdo.JDOHelper;
import javax.jdo.PersistenceManagerFactory;
/* This code from google. */
public final class PMF {
private static final PersistenceManagerFactory pmfInstance =
JDOHelper.getPersistenceManagerFactory("transactions-optional");
private PMF() {}
public static PersistenceManagerFactory get() {
return pmfInstance;
}
}
8．Web Applicationの起動
Web Applicationとは、Google App Engine SDKに含まれるWebサーバです。プロジェクト（ここではmemo_server）を選択して右クリックし、Run As → Web Applicationをクリックすることで、Web Applicationを実行できます。Eclipse上では、localhost:8080が稼動するデフォルト設定になっています。
