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/*
 * (c) Copyright 2018 Palantir Technologies Inc. All rights reserved.
 *
 * 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 com.palantir.tracing.api;

import java.util.Map;
import java.util.Optional;
import org.immutables.value.Value;

/** A value class representing a completed Span, see {@link OpenSpan} for a description of the fields. */
@Value.Immutable
@ImmutablesStyle
public abstract class Span {

    public abstract String getTraceId();

    public abstract Optional getParentSpanId();

    public abstract String getSpanId();

    public abstract SpanType type();

    public abstract String getOperation();

    public abstract long getStartTimeMicroSeconds();

    public abstract long getDurationNanoSeconds();
    /**
     * Returns a map of custom key-value metadata with which spans will be annotated. For example, a "userId" key could
     * be added to associate spans with the requesting user.
     */
    public abstract Map getMetadata();

    public static Builder builder() {
        return new Builder();
    }

    public static class Builder extends ImmutableSpan.Builder {}
}