com.yahoo.bullet.rest.service.RESTPubSubService Maven / Gradle / Ivy

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/*
 *  Copyright 2018, Yahoo Inc.
 *  Licensed under the terms of the Apache License, Version 2.0.
 *  See the LICENSE file associated with the project for terms.
 */
package com.yahoo.bullet.rest.service;

import org.springframework.stereotype.Service;
import java.util.concurrent.ConcurrentLinkedQueue;

@Service
public class RESTPubSubService {
    private ConcurrentLinkedQueue queries = new ConcurrentLinkedQueue<>();
    private ConcurrentLinkedQueue results = new ConcurrentLinkedQueue<>();

    /**
     * Get the next query from the query queue. Queries are removed after being read once.
     *
     * @return The next query.
     */
    public String getQuery() {
        return queries.poll();
    }

    /**
     * Get the next result from the result queue. Results are removed after being read once.
     *
     * @return the next result.
     */
    public String getResult() {
        return results.poll();
    }

    /**
     * Add a result to the result queue.
     *
     * @param result The result to add to the result queue.
     */
    public void postResult(String result) {
        results.add(result);
    }

    /**
     * Add a query to the query queue.
     *
     * @param query The query to add to the queue.
     */
    public void postQuery(String query) {
        queries.add(query);
    }
}