/*
 * JBoss, Home of Professional Open Source.
 *
 * Copyright 2021 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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.wildfly.extension.opentelemetry.api;

import javax.enterprise.inject.spi.CDI;
import javax.ws.rs.client.ClientRequestContext;
import javax.ws.rs.client.ClientRequestFilter;
import javax.ws.rs.ext.Provider;

import io.opentelemetry.api.OpenTelemetry;
import io.opentelemetry.context.Context;

/**
 * @author <a href="jasondlee@redhat.com">Jason Lee</a>
 */
@Provider
public class OpenTelemetryClientRequestFilter implements ClientRequestFilter {
    @Override
    public void filter(ClientRequestContext requestContext) {
        CDI.current().select(OpenTelemetry.class).get()
                .getPropagators()
                .getTextMapPropagator()
                .inject(Context.current(), requestContext,
                        (request, key, value) -> request.getHeaders().add(key, value));
    }
}
