hu.icellmobilsoft.coffee.grpc.metrics.micrometer.server.ServerMetricsInterceptor Maven / Gradle / Ivy

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 * %%
 * Copyright (C) 2020 - 2023 i-Cell Mobilsoft Zrt.
 * %%
 * 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.
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package hu.icellmobilsoft.coffee.grpc.metrics.micrometer.server;

import jakarta.enterprise.context.Dependent;

import hu.icellmobilsoft.coffee.grpc.metrics.api.IMetricsInterceptor;
import hu.icellmobilsoft.coffee.grpc.metrics.api.ServerMetricsInterceptorQualifier;
import hu.icellmobilsoft.coffee.grpc.metrics.api.constants.IGrpcMetricConstant;
import hu.icellmobilsoft.coffee.grpc.metrics.micrometer.bundle.MetricsBundle;
import hu.icellmobilsoft.coffee.grpc.metrics.micrometer.common.AbstractMetricsInterceptor;
import io.grpc.Metadata;
import io.grpc.ServerCall;
import io.grpc.ServerCallHandler;
import io.grpc.ServerInterceptor;

/**
 * gRPC server interceptor that will collect metrics using micrometer api
 * 
 * @author czenczl
 * @author Imre Scheffer
 * @since 2.5.0
 *
 */
@ServerMetricsInterceptorQualifier
@Dependent
public class ServerMetricsInterceptor extends AbstractMetricsInterceptor implements ServerInterceptor, IMetricsInterceptor {

    /**
     * Default constructor, constructs a new object.
     */
    public ServerMetricsInterceptor() {
        super();
    }

    @Override
    public  ServerCall.Listener interceptCall(ServerCall call, Metadata requestMetadata,
            ServerCallHandler next) {

        MetricsBundle metricBundle = createMetricBundle(call.getMethodDescriptor());

        MetricsServerCall monitoringCall = new MetricsServerCall(call, metricBundle);

        return new MetricsServerCallListener(next.startCall(monitoringCall, requestMetadata), metricBundle, monitoringCall::getResponseCode);
    }

    @Override
    protected String getRequestMetadataName() {
        return IGrpcMetricConstant.Server.METADATA_NAME_REQUEST_RECEIVED;
    }

    @Override
    protected String getResponseMetadataName() {
        return IGrpcMetricConstant.Server.METADATA_NAME_RESPONSE_SENT;
    }

    @Override
    protected String getTimerMetadataName() {
        return IGrpcMetricConstant.Server.METADATA_NAME_TIMER;
    }

}