메뉴 건너뛰기

Bigdata, Semantic IoT, Hadoop, NoSQL

Bigdata, Hadoop ecosystem, Semantic IoT등의 프로젝트를 진행중에 습득한 내용을 정리하는 곳입니다.
필요한 분을 위해서 공개하고 있습니다. 문의사항은 gooper@gooper.com로 메일을 보내주세요.


* 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)

<?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

<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

<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

<!-- 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

번호 제목 글쓴이 날짜 조회 수
79 protege 설명및 사용법 file 총관리자 2017.04.04 2754
78 Jena 2.3를 Hadoop 2.7.2의 NFS로 mount하고 fuseki를 이용하여 start할때 오류 메세지 총관리자 2016.12.02 1557
77 거침없이 배우는 Drools 책의 샘플소스 file 총관리자 2016.07.22 1232
76 update를 많이 하면 heap memory가 많이 소진되고 최종적으로 OOM가 발생하는데 이에 대한 설명 총관리자 2017.04.10 717
75 fuseki용 config-examples.ttl 예시 내용 총관리자 2017.05.17 646
74 Halyard - RDF4J와 Apache HBase를 이용하여 구현된 TripleStore이며 SPARQL 1.1쿼리를 지원한다. 총관리자 2016.12.29 630
73 동시에 많은 요청이 endpoint로 몰려서java.net.NoRouteToHostException가 발생하는 경우의 처리방법 총관리자 2016.10.17 510
72 DataSetCreator실행시 "Illegal character in fragment at index"오류가 나는 경우 조치방안 총관리자 2016.06.17 480
71 Drools 6.0 - 비즈니스 룰 기반으로 간단한 룰 애플리케이션 만들기 file 총관리자 2016.07.18 440
70 ontology, jena, sparql등 전반에 대한 설명및 예제를 제공하는 사이트 총관리자 2015.12.08 427
69 S2RDF를 실행부분만 추출하여 1건의 triple data를 HDFS에 등록, sparql을 sql로 변환, sql실행하는 방법및 S2RDF소스 컴파일 방법 총관리자 2016.06.15 410
68 sparql 문법구조 설명 file 총관리자 2015.12.09 378
67 특정문자열이나 URI를 임의로 select 절에 지정하여 사용할때 사용하는 sparql 문장 총관리자 2016.08.25 376
66 System Properties Comparison Elasticsearch vs. Hive vs. Jena file 총관리자 2016.03.10 285
65 룰에 매칭되면 발생되는 엑티베이션 객체에 대한 작업(이전값 혹은 현재값)을 처리하는 클래스 파일 총관리자 2016.07.21 285
64 SPARQL의 유형, SPARQL 만들기등에 대한 설명 총관리자 2016.02.18 274
63 fuseki에 update하는 방법(java api이용)및 주의 사항 총관리자 2015.12.30 258
62 sparql 1.1 BIND(if() as ?bind변수) 버그로 추정되는 문제점및 해결방안 -> select 문에 (if(,,) as ?bind변수) file 총관리자 2016.01.21 257
61 ?a는 모두 표시하면서 ?b와 비교하여 ?a=?b는 표시하고 ?a!=?b 인경우는 ""로 구성된 결과 집합을 구하는 경우 file 총관리자 2016.01.29 255
60 How-to: Build a Complex Event Processing App on Apache Spark and Drools file 총관리자 2016.10.31 253

A personal place to organize information learned during the development of such Hadoop, Hive, Hbase, Semantic IoT, etc.
We are open to the required minutes. Please send inquiries to gooper@gooper.com.

위로