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/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * 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 io.gravitee.node.tracing;

import io.gravitee.tracing.api.Span;
import io.gravitee.tracing.api.Tracer;

/**
 * @author David BRASSELY (david.brassely at graviteesource.com)
 * @author GraviteeSource Team
 */
public class LazyTracer implements Tracer, TracingService.TracerListener {

    private io.gravitee.node.api.tracing.Tracer tracer;

    @Override
    public Span span(String spanName) {
        if (tracer != null) {
            return tracer.trace(spanName);
        }

        return new NoOpSpan();
    }

    @Override
    public void onRegister(io.gravitee.node.api.tracing.Tracer tracer) {
        this.tracer = tracer;
    }
}