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Apache CXF Observability using Micrometer Observation

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.apache.cxf.tracing.micrometer;

import org.apache.cxf.common.injection.NoJSR250Annotations;
import org.apache.cxf.interceptor.Fault;
import org.apache.cxf.message.Message;
import org.apache.cxf.phase.Phase;

import io.micrometer.observation.ObservationRegistry;

@NoJSR250Annotations
public class ObservationStopInterceptor extends AbstractObservationInterceptor {
    public ObservationStopInterceptor(final ObservationRegistry observationRegistry) {
        super(Phase.POST_MARSHAL, observationRegistry);
    }

    @Override
    public void handleMessage(Message message) throws Fault {
        @SuppressWarnings("unchecked")
        final TraceScopeHolder holder =
                (TraceScopeHolder) message.getExchange().get(OBSERVATION_SCOPE);

        super.stopTraceSpan(holder, observation -> {
            MessageInContext context = (MessageInContext) observation.getContext();
            context.setResponse(message);
        });
    }
}