io.micrometer.core.instrument.binder.grpc.MetricCollectingServerCall Maven / Gradle / Ivy
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/*
* Copyright 2021 VMware, Inc.
*
* 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
*
* https://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 io.micrometer.core.instrument.binder.grpc;
import io.grpc.ForwardingServerCall.SimpleForwardingServerCall;
import io.grpc.Metadata;
import io.grpc.ServerCall;
import io.grpc.Status;
import io.grpc.Status.Code;
import io.micrometer.core.instrument.Counter;
/**
* A simple forwarding server call that collects metrics.
*
* @param The type of message received one or more times from the client.
* @param The type of message sent one or more times to the client.
* @author Daniel Theuke ([email protected])
*/
class MetricCollectingServerCall extends SimpleForwardingServerCall {
private final Counter responseCounter;
private Code responseCode = Code.UNKNOWN;
/**
* Creates a new delegating ServerCall that will wrap the given server call to collect metrics.
*
* @param delegate The original call to wrap.
* @param responseCounter The counter for outgoing responses.
*/
public MetricCollectingServerCall(
final ServerCall delegate,
final Counter responseCounter) {
super(delegate);
this.responseCounter = responseCounter;
}
public Code getResponseCode() {
return this.responseCode;
}
@Override
public void close(final Status status, final Metadata responseHeaders) {
this.responseCode = status.getCode();
super.close(status, responseHeaders);
}
@Override
public void sendMessage(final A responseMessage) {
this.responseCounter.increment();
super.sendMessage(responseMessage);
}
}