ScalesResource.java

/*
 * Copyright 2012 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.carlomicieli.rest.resources;

import static com.github.carlomicieli.rest.representations.ScalesArrayRepresentation.createArray;

import java.net.URI;

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.CacheControl;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Scope;
import org.springframework.dao.DataAccessException;

import com.github.carlomicieli.entities.Scale;
import com.github.carlomicieli.rest.representations.ScaleRepresentation;
import com.github.carlomicieli.services.ScaleService;
import com.sun.jersey.api.spring.Autowire;

/**
 * 
 * @author Carlo Micieli
 *
 */
@Autowire
@Scope("request")
@Path("/scales")
public class ScalesResource {
	private static final Logger log = LoggerFactory.getLogger("rest");
	
	private @Inject ScaleService scaleService;
	
	private CacheControl getCacheControl() {
		CacheControl cache = new CacheControl();
		cache.setMaxAge(10);
		cache.setPrivate(true);
		return cache;
	}
	
	/**
	 * Return the list of all brands.
	 * <p>
	 * <code>GET /brands</code>
	 * </p>
	 * 
	 * @return the list of brands.
	 */
	@GET
	@Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
	public Response getScales() {
		log.info("GET /scales");
		
		try {
			final ScaleRepresentation[] scales =
					createArray(scaleService.getAllScales());
	
			return Response.ok(scales)
					.cacheControl(getCacheControl())
					.build();
		}
		catch( DataAccessException ex ) {
			log.error(ex.getMessage());
			throw new WebApplicationException(Status.INTERNAL_SERVER_ERROR);
		}
	}
	
	@GET
	@Path("/{scaleId}")
	@Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
	public Response getScale(@PathParam("scaleId") long scaleId) {
		log.info("GET /scales/{}", scaleId);
		
		try {
			final ScaleRepresentation scaleRep =
					new ScaleRepresentation(scaleService.getScale(scaleId));
			return Response.ok(scaleRep)
					.tag(scaleRep.tag())
					.cacheControl(getCacheControl())
					.build();
		}
		catch( DataAccessException ex ) {
			log.error(ex.getMessage());
			throw new WebApplicationException(Status.INTERNAL_SERVER_ERROR);
		}
	}
	
	@POST
	@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
	public Response post(MultivaluedMap<String, String> formValues) {
		return post(new ScaleRepresentation(formValues));
	}
	
	@POST
	@Consumes({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
	public Response post(ScaleRepresentation scaleRep) {
		log.info("POST /scales");
		
		final Scale scale = scaleRep.getInner();
		
		try {
			long id = scaleService.create(scale);
			
			// the response contains the ETag for the resource just created.
			return Response.created(URI.create(Long.toString(id)))
					.tag(scaleRep.tag())
					.build();
		}
		catch( RuntimeException ex ) {
			log.error(ex.getMessage());
			throw new WebApplicationException(Status.INTERNAL_SERVER_ERROR);
		}
	}
	
	@PUT
	@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
	public Response put(MultivaluedMap<String, String> formValues) {
		return put(new ScaleRepresentation(formValues));
	}
	
	@PUT
	@Consumes({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
	public Response put(ScaleRepresentation scaleRep) {
		log.info("PUT /scales");
		
		final Scale scale = scaleRep.getInner();
		
		try {
			scaleService.save(scale);
			
			// the response contains the ETag for the resource just created.
			return Response.noContent()
					.tag(scaleRep.tag())
					.build();
		}
		catch( RuntimeException ex ) {
			log.error(ex.getMessage());
			throw new WebApplicationException(Status.INTERNAL_SERVER_ERROR);
		}
	}
	
	@DELETE
	@Consumes({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
	public void delete(ScaleRepresentation scaleRep) {
		delete(scaleRep.getId());
	}
	
	@DELETE
	@Path("/{scaleId}")
	public void delete(@PathParam("scaleId") long scaleId) {
		log.info("DELETE /scales");
		
		try {
			scaleService.remove(new Scale(scaleId));
		}
		catch( RuntimeException ex ) {
			log.error(ex.getMessage());
			throw new WebApplicationException(Response.Status.INTERNAL_SERVER_ERROR);
		}
	}
}