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WIP(ch9lab) add source for java-based todo-api app

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This commit is contained in:
Dan K
2019-07-22 15:38:35 -04:00
parent c37d409c1d
commit 81fbcfc240
20 changed files with 610 additions and 0 deletions
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19
todo-api-micro/src/main/java/com/redhat/training/example/todoapi/rest/HelloWorldEndpoint.java Executable file
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package com.redhat.training.example.todoapi.rest;
import javax.ws.rs.Path;
import javax.ws.rs.core.Response;
import javax.ws.rs.GET;
import javax.ws.rs.Produces;
@Path("/hello")
public class HelloWorldEndpoint {
@GET
@Produces("text/plain")
public Response doGet() {
return Response.ok("Hello World!").build();
}
}

25
todo-api-micro/src/main/java/com/redhat/training/example/todoapi/rest/Main.java Normal file
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package com.redhat.training.example.todoapi.rest;
import org.wildfly.swarm.Swarm;
import org.wildfly.swarm.datasources.DatasourcesFraction;
public class Main {
public static void main(String[] args) throws Exception {
String host = System.getenv("HOST");
new Swarm()
.fraction(new DatasourcesFraction()
.jdbcDriver("mysql", (d) -> {
d.driverClassName("com.mysql.cj.jdbc.Driver");
d.xaDatasourceClass("com.mysql.jdbc.jdbc2.optional.MysqlXADataSource");
d.driverModuleName("com.mysql");
})
.dataSource("MySQLDS", (ds) -> {
ds.driverName("mysql");
ds.connectionUrl("jdbc:mysql://"+host+":8889/todo");
ds.userName("root");
ds.password("root");
}))
.start()
.deploy();
}
}

24
todo-api-micro/src/main/java/com/redhat/training/model/Host.java Normal file
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package com.redhat.training.model;
import java.net.InetAddress;
public class Host {
private String ip;
private String hostname;
public Host(String ip, String hostname) {
this.ip = ip;
this.hostname = hostname;
}
public String getIp() {
return ip;
}
public String getHostname() {
return hostname;
}
}

53
todo-api-micro/src/main/java/com/redhat/training/model/Item.java Normal file
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package com.redhat.training.model;
import javax.persistence.*;
@Entity
public class Item {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String description;
private Boolean done = false;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Boolean isDone() {
return done;
}
public void setDone(Boolean done) {
this.done = done;
}
@Override
public boolean equals(Object o) {
if (this == o) { return true; }
if (o == null || getClass() != o.getClass()) { return false; }
Item item = (Item) o;
return id.equals(item.id);
}
@Override
public int hashCode() {
return id.hashCode();
}
}

30
todo-api-micro/src/main/java/com/redhat/training/rest/CORSRequestFilter.java Normal file
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package com.redhat.training.rest;
import java.io.IOException;
import java.util.logging.Logger;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerRequestFilter;
import javax.ws.rs.container.PreMatching;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.Provider;
@Provider
@PreMatching
public class CORSRequestFilter implements ContainerRequestFilter {
private final static Logger log = Logger.getLogger(CORSRequestFilter.class.getName());
@Override
public void filter(ContainerRequestContext requestCtx) throws IOException {
log.fine("Executing REST request filter");
// When HttpMethod comes as OPTIONS, just acknowledge that it accepts...
if (requestCtx.getRequest().getMethod().equals( "OPTIONS" )) {
log.fine("HTTP Method (OPTIONS) - Detected!");
// Just send a OK signal back to the browser
requestCtx.abortWith(Response.status(Response.Status.OK).build());
}
}
}

32
todo-api-micro/src/main/java/com/redhat/training/rest/CORSResponseFilter.java Normal file
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package com.redhat.training.rest;
import java.io.IOException;
import java.util.logging.Logger;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerResponseContext;
import javax.ws.rs.container.ContainerResponseFilter;
import javax.ws.rs.container.PreMatching;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.Provider;
@Provider
@PreMatching
public class CORSResponseFilter implements ContainerResponseFilter {
private final static Logger log = Logger.getLogger(CORSResponseFilter.class.getName());
@Override
public void filter(ContainerRequestContext requestCtx, ContainerResponseContext responseCtx) throws IOException {
log.fine("Executing REST response filter");
MultivaluedMap<String, Object> headers = responseCtx.getHeaders();
headers.add("Access-Control-Allow-Origin", "*");
headers.add("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT, OPTIONS");
headers.add("Access-Control-Allow-Headers", "X-Requested-With, Content-Type");
//responseCtx.getHeaders().add( "Access-Control-Allow-Credentials", "true" );
}
}

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todo-api-micro/src/main/java/com/redhat/training/rest/HostService.java Normal file
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package com.redhat.training.rest;
import java.net.InetAddress;
import java.net.UnknownHostException;
import javax.ejb.Stateless;
import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import com.redhat.training.model.Host;
@Stateless
@Path("host")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public class HostService {
@GET
public Host getHostInfo() throws UnknownHostException {
InetAddress address = InetAddress.getLocalHost();
Host host = new Host(address.getHostAddress(), address.getHostName());
return host;
}
}

97
todo-api-micro/src/main/java/com/redhat/training/rest/ItemService.java Normal file
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package com.redhat.training.rest;
import com.redhat.training.model.Item;
import com.redhat.training.ui.PaginatedListWrapper;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import javax.persistence.TypedQuery;
import javax.ws.rs.*;
import javax.ws.rs.core.Application;
import javax.ws.rs.core.MediaType;
import java.util.List;
@Stateless
@Path("items")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public class ItemService extends Application {
@PersistenceContext
private EntityManager entityManager;
private Integer countItems() {
Query query = entityManager.createQuery("SELECT COUNT(i.id) FROM Item i");
return ((Long) query.getSingleResult()).intValue();
}
private List<Item> findItems(int startPosition, int maxResults, String sortFields, String sortDirections) {
TypedQuery<Item> query =
entityManager.createQuery("SELECT i FROM Item i ORDER BY i." + sortFields + " " + sortDirections,
Item.class);
query.setFirstResult(startPosition);
query.setMaxResults(maxResults);
return query.getResultList();
}
private PaginatedListWrapper findItems(PaginatedListWrapper wrapper) {
wrapper.setTotalResults(countItems());
int start = (wrapper.getCurrentPage() - 1) * wrapper.getPageSize();
wrapper.setList(findItems(start,
wrapper.getPageSize(),
wrapper.getSortFields(),
wrapper.getSortDirections()));
return wrapper;
}
@GET
@Produces(MediaType.APPLICATION_JSON)
public PaginatedListWrapper listItems(@DefaultValue("1")
@QueryParam("page")
Integer page,
@DefaultValue("id")
@QueryParam("sortFields")
String sortFields,
@DefaultValue("asc")
@QueryParam("sortDirections")
String sortDirections) {
PaginatedListWrapper paginatedListWrapper = new PaginatedListWrapper();
paginatedListWrapper.setCurrentPage(page);
paginatedListWrapper.setSortFields(sortFields);
paginatedListWrapper.setSortDirections(sortDirections);
paginatedListWrapper.setPageSize(10);
return findItems(paginatedListWrapper);
}
@GET
@Path("{id}")
public Item getitem(@PathParam("id") Long id) {
return entityManager.find(Item.class, id);
}
@POST
public Item saveItem(Item item) {
if (item.getId() == null) {
Item itemToSave = new Item();
itemToSave.setDescription(item.getDescription());
itemToSave.setDone(item.isDone());
entityManager.persist(item);
} else {
Item itemToUpdate = getitem(item.getId());
itemToUpdate.setDescription(item.getDescription());
itemToUpdate.setDone(item.isDone());
item = entityManager.merge(itemToUpdate);
}
return item;
}
@DELETE
@Path("{id}")
public void deleteItem(@PathParam("id") Long id) {
entityManager.remove(getitem(id));
}
}

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todo-api-micro/src/main/java/com/redhat/training/rest/RestApplication.java Normal file
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package com.redhat.training.rest;
import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
@ApplicationPath("/todo/api")
public class RestApplication extends Application {
}

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todo-api-micro/src/main/java/com/redhat/training/ui/PaginatedListWrapper.java Normal file
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package com.redhat.training.ui;
import com.redhat.training.model.Item;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import java.io.Serializable;
import java.util.List;
@XmlRootElement
public class PaginatedListWrapper implements Serializable {
private static final long serialVersionUID = 1L;
private Integer currentPage;
private Integer pageSize;
private Integer totalResults;
private String sortFields;
private String sortDirections;
@XmlElement
private List<Item> list;
public Integer getCurrentPage() {
return currentPage;
}
public void setCurrentPage(Integer currentPage) {
this.currentPage = currentPage;
}
public Integer getPageSize() {
return pageSize;
}
public void setPageSize(Integer pageSize) {
this.pageSize = pageSize;
}
public Integer getTotalResults() {
return totalResults;
}
public void setTotalResults(Integer totalResults) {
this.totalResults = totalResults;
}
public String getSortFields() {
return sortFields;
}
public void setSortFields(String sortFields) {
this.sortFields = sortFields;
}
public String getSortDirections() {
return sortDirections;
}
public void setSortDirections(String sortDirections) {
this.sortDirections = sortDirections;
}
public List<Item> getList() {
return list;
}
public void setList(List<Item> list) {
this.list = list;
}
}