/*
* Copyright 2002-2013 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 org.springframework.xd.dirt.rest.metrics;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.web.PagedResourcesAssembler;
import org.springframework.hateoas.ExposesResourceFor;
import org.springframework.hateoas.PagedResources;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.xd.analytics.metrics.core.Counter;
import org.springframework.xd.analytics.metrics.core.CounterRepository;
import org.springframework.xd.dirt.analytics.NoSuchMetricException;
import org.springframework.xd.rest.domain.metrics.CounterResource;
import org.springframework.xd.rest.domain.metrics.MetricResource;
/**
* Exposes representations of {@link Counter}s.
*
* @author Eric Bottard
*/
@Controller
@RequestMapping("/metrics/counters")
@ExposesResourceFor(CounterResource.class)
public class CountersController extends AbstractMetricsController<CounterRepository, Counter> {
private final DeepCounterResourceAssembler counterResourceAssembler = new DeepCounterResourceAssembler();
@Autowired
public CountersController(CounterRepository counterRepository) {
super(counterRepository);
}
/**
* List Counters that match the given criteria.
*/
@Override
@ResponseBody
@RequestMapping(value = "", method = RequestMethod.GET)
public PagedResources<MetricResource> list(Pageable pageable, PagedResourcesAssembler<Counter> pagedAssembler) {
return super.list(pageable, pagedAssembler);
}
/**
* Retrieve information about a specific counter.
*/
@ResponseBody
@RequestMapping(value = "/{name}", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
public CounterResource display(@PathVariable("name") String name) {
Counter c = repository.findOne(name);
if (c == null) {
throw new NoSuchMetricException(name, "There is no counter named '%s'");
}
return counterResourceAssembler.toResource(c);
}
}