Ćwiczenie 10 Tworzenie aplikacji listy zakupów Aplikacja REST z wykorzystaniem JAXRS, JPA, Maven

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Valerie Fields
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1 Ćwiczenie 10 Tworzenie aplikacji listy zakupów Aplikacja REST z wykorzystaniem JAXRS, JPA, Maven Tworzenie aplikacji 1. Tworzymy nowy projekt Maven o nazwie webjpa i wybieramy archetyp. Jako lokalizację wybieramy c:/projekt:

2 2. Struktura folderów i plików projektu:klasa wykonująca operacje na bazie danych (ProductRepository): package data; import javax.enterprise.context.applicationscoped; import javax.inject.inject; import javax.persistence.entitymanager; import javax.persistence.entitytransaction; import javax.ejb.stateless; import javax.ejb.transactionattribute; import javax.ejb.transactionattributetype; import javax.naming.context; import javax.naming.initialcontext; import javax.persistence.query; import javax.persistence.criteria.criteriabuilder; import javax.persistence.criteria.criteriaquery; import javax.persistence.criteria.root; import javax.persistence.*; import javax.annotation.resource; import javax.transaction.usertransaction;

3 import java.util.logging.logger; import java.util.list; import public class ProductRepository { private Logger logger = private EntityManager private UserTransaction ut; public Product findbyid(long id) { return em.find(product.class, id); public List<Product> findallorderedbyname() { CriteriaBuilder cb = em.getcriteriabuilder(); CriteriaQuery<Product> criteria = cb.createquery(product.class); Root<Product> product = criteria.from(product.class); criteria.select(product).orderby(cb.asc(product.get("name"))); return em.createquery(criteria).getresultlist(); public void deleteproduct(long id){ try{ ut.begin(); Product product = em.find(product.class, id); em.remove(product); ut.commit(); catch (Exception e) { logger.warning(e.getmessage()); 3. Tworzymy model danych (klasa Product): package model; import java.io.serializable;

4 import javax.persistence.column; import javax.persistence.entity; import javax.persistence.generatedvalue; import javax.persistence.id; import javax.persistence.table; import javax.persistence.uniqueconstraint; import javax.validation.constraints.digits; import javax.validation.constraints.notnull; import javax.validation.constraints.pattern; import javax.validation.constraints.size; import javax.xml.bind.annotation.xmlrootelement; import org.hibernate.validator.constraints. ; @Table(name = "product", uniqueconstraints = "id")) public class Product implements Serializable { private static final long serialversionuid private int private String private int quantity; public int getid(int id) { return id; public void setid(int id) { this.id = id; public String getname() { return name; public void setname(string name) { this.name = name; public int getquantity() { return quantity;

5 public void setquantity(int quantity) { this.quantity = quantity; public Product() { public Product(int id, String name, int quantity) { this.id = id; this.name = name; this.quantity = public String tostring() { return "[" + id + "] - " + name + " - " + quantity; 4. Klasa RestConfig: package rest; import javax.ws.rs.applicationpath; import public class RestConfig extends Application { 5. Tworzymy klasę odpowiedzialną za obsługę REST. Wymiana danych będzie odbywać się w fomracie JSON. W klasie zostaną wygenerowane przykładowe dane do sprawdzenia działania aplikacji. Kod klasy Endpoint: package rest; import java.util.arrays; import java.util.hashmap; import java.util.list; import java.util.map; import javax.inject.inject; import javax.ws.rs.consumes; import javax.ws.rs.delete; import javax.ws.rs.get; import javax.ws.rs.post; import javax.ws.rs.put; import javax.ws.rs.path; import javax.ws.rs.pathparam; import javax.ws.rs.produces; import javax.ws.rs.webapplicationexception; import javax.ws.rs.core.mediatype; import javax.ws.rs.core.response;

6 import model.product; import public class Endpoint private ProductRepository public List<Product> getall() { try{ return repository.findallorderedbyname(); catch (Exception e) { Map<String, String> responseobj = new HashMap<String, String>(); responseobj.put("error", e.getmessage()); throw new public Product getproduct(@pathparam("id") int id) { Product product = new Product(id, "chleb", 2); public Product addproduct(product product) { @Consumes(MediaType.APPLICATION_JSON) public Response saveproduct(@pathparam("id") int id, Product product) { Response.ResponseBuilder builder = null; builder = Response.ok("{\"status\" : \"ok\""); public Response delproduct(@pathparam("id") long id) { Response.ResponseBuilder builder = null; builder = Response.ok("{\"status\" : \"ok\""); return builder.build();

7 6. Klasa Resources package util; import java.util.logging.logger; import javax.enterprise.inject.produces; import javax.enterprise.inject.spi.injectionpoint; import javax.persistence.entitymanager; import javax.persistence.persistencecontext; public class private EntityManager public Logger producelog(injectionpoint injectionpoint) { return Logger.getLogger(injectionPoint.getMember().getDeclaringClass().getName()); 7. Plik beans.xml: <?xml version="1.0" encoding="utf-8"?>  <beans xmlns=" xmlns:xsi=" xsi:schemalocation=" bean-discovery-mode="all"> </beans> 8. Plik persistnce.xml: <?xml version="1.0" encoding="utf-8"?> <persistence xmlns=" xmlns:xsi=" xsi:schemalocation=" version="1.0"> <persistence-unit name="university-app"> <provider>org.hibernate.ejb.hibernatepersistence</provider> <jta-data-source>java:jboss/datasources/wseidatasource</jta-data-source> <class>model.student</class> <properties> <property name="hibernate.show_sql" value="true" /> <property name="hibernate.cache.provider_class" value="org.hibernate.cache.hashtablecacheprovider" /> <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.jbosstransactionmanagerlookup" /> <property name="hibernate.dialect"

8 value="org.hibernate.dialect.mysqldialect" /> <property name="hibernate.id.new_generator_mappings" value="false" /> </properties> </persistence-unit> </persistence> 9. Plik pom.xml: <project xmlns=" xmlns:xsi=" xsi:schemalocation=" <modelversion>4.0.0</modelversion> <groupid>pl.edu.wsei</groupid> <artifactid>webjpa</artifactid> <packaging>war</packaging> <version>0.0.1-snapshot</version> <name>webjpa Maven Webapp</name> <url> <dependencies> <groupid>junit</groupid> <artifactid>junit</artifactid> <version>3.8.1</version> <scope>test</scope> <groupid>org.jboss.spec.javax.ws.rs</groupid> <artifactid>jboss-jaxrs-api_2.0_spec</artifactid> <scope>provided</scope> <groupid>org.hibernate.javax.persistence</groupid> <artifactid>hibernate-jpa-2.1-api</artifactid> <scope>provided</scope> <groupid>org.hibernate.validator</groupid> <artifactid>hibernate-validator</artifactid> <version>6.0.7.final</version> <groupid>org.jboss.spec.javax.ejb</groupid> <artifactid>jboss-ejb-api_3.2_spec</artifactid> <scope>provided</scope>  <groupid>javax.enterprise</groupid> <artifactid>cdi-api</artifactid> <scope>provided</scope> <groupid>javax.transaction</groupid> <artifactid>jta</artifactid> <version>1.1</version>

9 <groupid>javax.annotation</groupid> <artifactid>jsr250-api</artifactid> <version>1.0</version> </dependencies> <build> <finalname>webjpa</finalname> </build> <dependencymanagement> <dependencies> <groupid>org.jboss.spec</groupid> <artifactid>jboss-javaee-7.0</artifactid> <version>1.0.3.final</version> <scope>import</scope> <type>pom</type> </dependencies> </dependencymanagement> </project> 10/ Uruchom wiersz poleceń cmd i przejdź do folderu c:/projekt/webjpa. Następnie wpisz polecenie: mvn install. Jeżeli instalacja zakończy się sukcesem, w folderze target aplikacji pojawi się plik wepjpa.war, który można zainstalować na serwerze. Efekt działania aplikacji:

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