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Support for distributed tracing.

There is a newer version: 4.1.1

/*
 * Copyright (c) 2022 Oracle and/or its affiliates.
 *
 * 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.helidon.tracing;

import java.util.Optional;

class NoOpTracerProvider implements io.helidon.tracing.spi.TracerProvider {
    private static final NoOpBuilder BUILDER = NoOpBuilder.create();
    private static final Tracer TRACER = BUILDER.build();

    @Override
    public TracerBuilder createBuilder() {
        return BUILDER;
    }

    @Override
    public Tracer global() {
        return TRACER;
    }

    @Override
    public void global(Tracer tracer) {
        // ignored
    }

    @Override
    public Optional currentSpan() {
        return Optional.empty();
    }

    @Override
    public boolean available() {
        return false;
    }
}