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OpenTracing integration for Microprofile

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/**
 * Copyright 2015-2018 Red Hat, Inc, and individual contributors.
 *
 * 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.swarm.mpopentracing.deployment;

import io.opentracing.contrib.interceptors.OpenTracingInterceptor;
import org.jboss.logging.Logger;

import javax.enterprise.event.Observes;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.BeforeBeanDiscovery;
import javax.enterprise.inject.spi.Extension;

/**
 * @author Pavol Loffay
 */
public class OpenTracingCDIExtension implements Extension {

  private static final Logger logger = Logger.getLogger(OpenTracingCDIExtension.class);

  public void observeBeforeBeanDiscovery(@Observes BeforeBeanDiscovery bbd, BeanManager manager) {
    logger.info("Registering Tracer CDI producer");
    String extensionName = OpenTracingCDIExtension.class.getName();
    for (Class clazz : new Class[] {
            TracerProducer.class,
            OpenTracingInterceptor.class,
    }) {
      bbd.addAnnotatedType(manager.createAnnotatedType(clazz), extensionName + "_" + clazz.getName());
    }
  }
}