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There is a newer version: 8.15.1

/*
 * 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.rest;

import org.elasticsearch.common.io.stream.BytesStream;
import org.elasticsearch.core.Nullable;
import org.elasticsearch.xcontent.XContentBuilder;
import org.elasticsearch.xcontent.XContentType;

import java.io.IOException;
import java.io.OutputStream;

/**
 * A channel used to construct bytes / builder based outputs, and send responses.
 */
public interface RestChannel {

    XContentBuilder newBuilder() throws IOException;

    XContentBuilder newErrorBuilder() throws IOException;

    XContentBuilder newBuilder(@Nullable XContentType xContentType, boolean useFiltering) throws IOException;

    XContentBuilder newBuilder(@Nullable XContentType xContentType, @Nullable XContentType responseContentType, boolean useFiltering)
        throws IOException;

    XContentBuilder newBuilder(
        @Nullable XContentType xContentType,
        @Nullable XContentType responseContentType,
        boolean useFiltering,
        OutputStream out
    ) throws IOException;

    BytesStream bytesOutput();

    /**
     * Releases the current output buffer for this channel. Must be called after the buffer derived from {@link #bytesOutput} is no longer
     * needed.
     */
    void releaseOutputBuffer();

    RestRequest request();

    /**
     * @return true iff an error response should contain additional details like exception traces.
     */
    boolean detailedErrorsEnabled();

    void sendResponse(RestResponse response);
}