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/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */

package org.elasticsearch.script;

import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Writeable;
import org.elasticsearch.common.xcontent.ToXContentFragment;
import org.elasticsearch.common.xcontent.XContentBuilder;

import java.io.IOException;
import java.util.Objects;

public class ScriptContextStats implements Writeable, ToXContentFragment, Comparable {
    private final String context;
    private final long compilations;
    private final long cacheEvictions;
    private final long compilationLimitTriggered;

    public ScriptContextStats(String context, long compilations, long cacheEvictions, long compilationLimitTriggered) {
        this.context = Objects.requireNonNull(context);
        this.compilations = compilations;
        this.cacheEvictions = cacheEvictions;
        this.compilationLimitTriggered = compilationLimitTriggered;
    }

    public ScriptContextStats(StreamInput in) throws IOException {
        context = in.readString();
        compilations = in.readVLong();
        cacheEvictions = in.readVLong();
        compilationLimitTriggered = in.readVLong();
    }

    @Override
    public void writeTo(StreamOutput out) throws IOException {
        out.writeString(context);
        out.writeVLong(compilations);
        out.writeVLong(cacheEvictions);
        out.writeVLong(compilationLimitTriggered);
    }

    public String getContext() {
        return context;
    }

    public long getCompilations() {
        return compilations;
    }

    public long getCacheEvictions() {
        return cacheEvictions;
    }

    public long getCompilationLimitTriggered() {
        return compilationLimitTriggered;
    }

    @Override
    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
        builder.startObject();
        builder.field(Fields.CONTEXT, getContext());
        builder.field(Fields.COMPILATIONS, getCompilations());
        builder.field(Fields.CACHE_EVICTIONS, getCacheEvictions());
        builder.field(Fields.COMPILATION_LIMIT_TRIGGERED, getCompilationLimitTriggered());
        builder.endObject();
        return builder;
    }

    @Override
    public int compareTo(ScriptContextStats o) {
        return this.context.compareTo(o.context);
    }

    static final class Fields {
        static final String CONTEXT = "context";
        static final String COMPILATIONS = "compilations";
        static final String CACHE_EVICTIONS = "cache_evictions";
        static final String COMPILATION_LIMIT_TRIGGERED = "compilation_limit_triggered";
    }
}