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halyard/rdf4j RDF4J의 RESTFul API처리 클래스 소스 파악(web module위주)

총관리자 2017.08.30 14:29 조회 수 : 3262

* rdf4j-http-workbench모듈은 java servlet을 이용하여 구현했고, rdf4j-http-server는 spring기반으로 구현되어 있음


1. rdf4j-http-workbench : rdf4j-workbench.war를 이용하여 web에서 작업할때 사용되는 모듈(프로젝트)

  가. /rdf4j-http-workbench/src/main/webapp/WEB-INF/web.xml에서 workbench의 RESTFul API와 매핑되는 class파일을 지정함


*rdf4j-workbench.war의 API에서 사용되는 URL매핑(web.xml파일)

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<?xml version="1.0" encoding="UTF-8"?>
<web-app>
 
    <display-name>RDF4J Workbench</display-name>
    <description>RDF4J Workbench</description>
 
    <filter>
        <filter-name>redirect</filter-name>
        <filter-class>
            org.eclipse.rdf4j.workbench.proxy.RedirectFilter
        </filter-class>
        <init-param>
            <param-name>/</param-name>
            <param-value>/repositories</param-value>
        </init-param>
    </filter>
 
    <filter>
        <filter-name>cache</filter-name>
        <filter-class>
            org.eclipse.rdf4j.workbench.proxy.CookieCacheControlFilter
        </filter-class>
    </filter>
 
    <filter>
        <filter-name>CacheFilter</filter-name>
        <filter-class>org.eclipse.rdf4j.workbench.proxy.CacheFilter</filter-class>
        <init-param>
            <param-name>Cache-Control</param-name>
            <param-value>600</param-value>
        </init-param>
    </filter>
 
    <filter-mapping>
        <filter-name>redirect</filter-name>
        <url-pattern>/</url-pattern>
    </filter-mapping>
 
    <filter-mapping>
        <filter-name>cache</filter-name>
        <url-pattern>/repositories/*</url-pattern>
    </filter-mapping>
 
    <filter-mapping>
        <filter-name>CacheFilter</filter-name>
        <url-pattern>*</url-pattern>
    </filter-mapping>
 
    <servlet>
        <servlet-name>workbench</servlet-name>
        <servlet-class>
            org.eclipse.rdf4j.workbench.proxy.WorkbenchGateway
        </servlet-class>
        <init-param>
            <param-name>transformations</param-name>
            <param-value>/transformations</param-value>
        </init-param>
        <init-param>
            <param-name>default-server</param-name>
            <param-value>/rdf4j-server</param-value>
        </init-param>
        <init-param>
            <param-name>accepted-server-prefixes</param-name>
            <param-value>file: http: https:</param-value>
        </init-param>
        <init-param>
            <param-name>change-server-path</param-name>
            <param-value>/NONE/server</param-value>
        </init-param>
        <init-param>
            <param-name>cookie-max-age</param-name>
            <param-value>2592000</param-value>
        </init-param>
        <init-param>
            <param-name>no-repository-id</param-name>
            <param-value>NONE</param-value>
        </init-param>
        <init-param>
            <param-name>default-path</param-name>
            <param-value>/NONE/repositories</param-value>
        </init-param>
        <init-param>
            <param-name>default-command</param-name>
            <param-value>/summary</param-value>
        </init-param>
        <init-param>
            <param-name>default-limit</param-name>
            <param-value>100</param-value>
        </init-param>
        <init-param>
            <param-name>default-queryLn</param-name>
            <param-value>SPARQL</param-value>
        </init-param>
        <init-param>
            <param-name>default-infer</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>default-Accept</param-name>
            <param-value>application/rdf+xml</param-value>
        </init-param>
        <init-param>
            <param-name>default-Content-Type</param-name>
            <param-value>application/rdf+xml</param-value>
        </init-param>
        <init-param>
            <param-name>/summary</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.SummaryServlet
            </param-value>
        </init-param>
        <init-param>
            <param-name>/info</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.InfoServlet</param-value>
        </init-param>
        <init-param>
            <param-name>/information</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.InformationServlet
            </param-value>
        </init-param>
        <init-param>
            <param-name>/repositories</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.RepositoriesServlet
            </param-value>
        </init-param>
        <init-param>
            <param-name>/create</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.CreateServlet
            </param-value>
        </init-param>
        <init-param>
            <param-name>/delete</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.DeleteServlet
            </param-value>
        </init-param>
        <init-param>
            <param-name>/namespaces</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.NamespacesServlet
            </param-value>
        </init-param>
        <init-param>
            <param-name>/contexts</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.ContextsServlet
            </param-value>
        </init-param>
        <init-param>
            <param-name>/types</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.TypesServlet
            </param-value>
        </init-param>
        <init-param>
            <param-name>/explore</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.ExploreServlet
            </param-value>
        </init-param>
        <init-param>
            <param-name>/query</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.QueryServlet
            </param-value>
        </init-param>
        <init-param>
            <param-name>/saved-queries</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.SavedQueriesServlet
            </param-value>
        </init-param>
        <init-param>
            <param-name>/export</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.ExportServlet
            </param-value>
        </init-param>
        <init-param>
            <param-name>/add</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.AddServlet</param-value>
        </init-param>
        <init-param>
            <param-name>/remove</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.RemoveServlet
            </param-value>
        </init-param>
        <init-param>
            <param-name>/clear</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.ClearServlet
            </param-value>
        </init-param>
        <init-param>
            <param-name>/update</param-name>
            <param-value>org.eclipse.rdf4j.workbench.commands.UpdateServlet
            </param-value>
        </init-param>
    </servlet>
 
    <servlet-mapping>
        <servlet-name>workbench</servlet-name>
        <url-pattern>/repositories/*</url-pattern>
    </servlet-mapping>
 
</web-app>

  나. rdf4j-http-workbench.war에서 사용하는 class파일(예,StatementsController.java)은 "/rdf4j-http-server-spring/src/main/java/org/eclipse/rdf4j/http/server/repository/statements/StatementsController.java"등에 위치함


2. rdf4j-http-server : rdf4j-server.war를 이용하여 RESTFul API를 호출할때 사용되는 모듈(프로젝트)

  가. /rdf4j-http-server/src/main/webapp/WEB-INF/web.xml에서 아래와 같이 설정xml파일을 지정함

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<servlet>
        <servlet-name>rdf4j-http-server</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/common-webapp-servlet.xml, /WEB-INF/common-webapp-system-servlet.xml, /WEB-INF/rdf4j-http-server-servlet.xml</param-value>
        </init-param>
        <load-on-startup>100</load-on-startup>
    </servlet>

  나. /rdf4j-http-server/src/main/webapp/WEB-INF/rdf4j-http-server-servlet.xml에서 API와 매핑되는 class파일을 지정함


*rdf4j-server.war의 repository관련 API에서 사용되는 URL매핑

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<bean id="rdf4jRepositoryUrlMapping"
        class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="order" value="2" />
        <property name="alwaysUseFullPath" value="true" />
        <property name="mappings">
            <props>
                <prop key="/repositories/*/namespaces/*">rdf4jRepositoryNamespaceController</prop>
                <prop key="/repositories/*/namespaces">rdf4jRepositoryNamespacesController</prop>
                <prop key="/repositories/*/contexts">rdf4jRepositoryContextsController</prop>
                <prop key="/repositories/*/statements">rdf4jRepositoryStatementsController</prop>
                <prop key="/repositories/*/rdf-graphs">rdf4jRepositoryContextsController</prop>
                <prop key="/repositories/*/rdf-graphs/*">rdf4jRepositoryGraphController</prop>
                <prop key="/repositories/*/size">rdf4jRepositorySizeController</prop>
                <prop key="/repositories/*/transactions">rdf4jRepositoryTransactionStartController</prop>
                <prop key="/repositories/*/transactions/*">rdf4jRepositoryTransactionController</prop>
                <prop key="/repositories/*">rdf4jRepositoryController</prop>
            </props>
        </property>
        <property name="interceptors">
            <list>
                <ref bean="rdf4jRepositoryInterceptor" />
            </list>
        </property>
    </bean>


*URL매핑에 해당되는 처리 class매핑

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<!-- CONTROLLERS -->
    <bean id="rdf4jProtocolController" class="org.eclipse.rdf4j.http.server.protocol.ProtocolController" />
 
    <bean id="rdf4jRepositoryListController"
        class="org.eclipse.rdf4j.http.server.repository.RepositoryListController">
        <property name="repositoryManager" ref="rdf4jRepositoryManager" />
    </bean>
    <bean id="rdf4jRepositoryController" class="org.eclipse.rdf4j.http.server.repository.RepositoryController">
        <property name="repositoryManager" ref="rdf4jRepositoryManager" />
    </bean>
    <bean id="rdf4jRepositoryContextsController"
        class="org.eclipse.rdf4j.http.server.repository.contexts.ContextsController" />
    <bean id="rdf4jRepositoryNamespacesController"
        class="org.eclipse.rdf4j.http.server.repository.namespaces.NamespacesController" />
    <bean id="rdf4jRepositoryNamespaceController"
        class="org.eclipse.rdf4j.http.server.repository.namespaces.NamespaceController" />
    <bean id="rdf4jRepositorySizeController" class="org.eclipse.rdf4j.http.server.repository.size.SizeController" />
    <bean id="rdf4jRepositoryStatementsController"
        class="org.eclipse.rdf4j.http.server.repository.statements.StatementsController" />
    <bean id="rdf4jRepositoryGraphController"
        class="org.eclipse.rdf4j.http.server.repository.graph.GraphController" />
    <bean id="rdf4jRepositoryTransactionController"
        class="org.eclipse.rdf4j.http.server.repository.transaction.TransactionController" />
    <bean id="rdf4jRepositoryTransactionStartController"
        class="org.eclipse.rdf4j.http.server.repository.transaction.TransactionStartController" />

다 rdf4j-server.war가 사용하는 class파일은(예, StatementsController.java) "/rdf4j-http-server-spring/src/main/java/org/eclipse/rdf4j/http/server/repository/statements/StatementsController.java"에 위치함

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