AsyncEntityController.java

package net.eusashead.hateoas.response.argumentresolver;

/*
 * #[license]
 * spring-responseentitybuilder
 * %%
 * Copyright (C) 2013 Eusa's Head
 * %%
 * 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.
 * %[license]
 */

import java.util.concurrent.Callable;

import net.eusashead.hateoas.response.DeleteResponseBuilder;
import net.eusashead.hateoas.response.EntityResponseBuilder;
import net.eusashead.hateoas.response.OptionsResponseBuilder;
import net.eusashead.hateoas.response.PostResponseBuilder;
import net.eusashead.hateoas.response.PutResponseBuilder;
import net.eusashead.hateoas.test.model.Entity;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
@RequestMapping(value="/async/{name}", consumes="application/json;charset=utf-8")
public class AsyncEntityController {

	@Autowired
	private EntityService service;

	@RequestMapping(method={RequestMethod.GET, RequestMethod.HEAD})
	public Callable<ResponseEntity<Entity>> get(@PathVariable final String name, final EntityResponseBuilder<Entity> builder) {

		return new Callable<ResponseEntity<Entity>>() {

			@Override
			public ResponseEntity<Entity> call() throws Exception {
				Entity entity = service.getEntity(name);
				return builder.entity(entity).etag().build();
			}
		};

	}

	@RequestMapping(method=RequestMethod.OPTIONS)
	public Callable<ResponseEntity<Entity>> options(final OptionsResponseBuilder<Entity> builder) {

		return new Callable<ResponseEntity<Entity>>() {

			@Override
			public ResponseEntity<Entity> call() throws Exception {
				return builder.allow(HttpMethod.GET, HttpMethod.HEAD).entity(new Entity("foo")).build();
			}
		};
	}

	@RequestMapping(method=RequestMethod.POST)
	public Callable<ResponseEntity<Void>> post(@RequestBody final Entity entity, final PostResponseBuilder builder) {

		return new Callable<ResponseEntity<Void>>() {

			@Override
			public ResponseEntity<Void> call() throws Exception {
				Entity created = service.save(entity);
				return builder.location("/path/to/{name}", created.getName()).build();
			}
		};
	}

	@RequestMapping(method=RequestMethod.PUT)
	public Callable<ResponseEntity<Void>> put(@RequestBody final Entity entity, final PutResponseBuilder<Entity> builder) {

		return new Callable<ResponseEntity<Void>>() {

			@Override
			public ResponseEntity<Void> call() throws Exception {
				Entity modified = service.save(entity);
				return builder.entity(modified).etag().build();
			}
		};
	}

	@RequestMapping(method=RequestMethod.DELETE)
	public Callable<ResponseEntity<Void>> delete(@PathVariable final String name, final DeleteResponseBuilder builder) {

		return new Callable<ResponseEntity<Void>>() {

			@Override
			public ResponseEntity<Void> call() throws Exception {
				service.delete(name);
				return builder.build();
			}
		};
	}
}