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Feign Micrometer Application Metrics
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/*
* Copyright © 2012 The Feign Authors ([email protected])
*
* 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 feign.micrometer;
import feign.Client;
import feign.FeignException;
import feign.Request;
import feign.Request.Options;
import feign.Response;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.Timer;
import java.io.IOException;
/** Wrap feign {@link Client} with metrics. */
public class MeteredClient extends BaseMeteredClient implements Client {
private final Client client;
public MeteredClient(Client client, MeterRegistry meterRegistry) {
this(client, meterRegistry, new FeignMetricName(Client.class), new FeignMetricTagResolver());
}
public MeteredClient(
Client client,
MeterRegistry meterRegistry,
MetricName metricName,
MetricTagResolver metricTagResolver) {
super(meterRegistry, metricName, metricTagResolver);
this.client = client;
}
@Override
public Response execute(Request request, Options options) throws IOException {
final Timer.Sample sample = Timer.start(meterRegistry);
Timer timer = null;
try {
final Response response = client.execute(request, options);
countResponseCode(request, response, options, response.status(), null);
timer = createTimer(request, response, options, null);
return response;
} catch (FeignException e) {
timer = createTimer(request, null, options, e);
countResponseCode(request, null, options, e.status(), e);
throw e;
} catch (IOException | RuntimeException e) {
timer = createTimer(request, null, options, e);
throw e;
} catch (Exception e) {
timer = createTimer(request, null, options, e);
throw new IOException(e);
} finally {
if (timer == null) {
timer = createTimer(request, null, options, null);
}
sample.stop(timer);
}
}
}
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