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

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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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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());
}
}
}

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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;
}
}

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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 {
}