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/**
 * RateLimitingStrategy is consulted before sending a request in AsyncSinkWriter to decide if a request should be sent.
 */
public interface RateLimitingStrategy {
    /**
     * Tracks the information of requests being sent (e.g. to track the current inFlightMessages / requests)
     * @param requestInfo    Data class containing information on request being sent
     */
    void startedRequest(RequestInfo requestInfo);

	 /**
     * Tracks the information of requests completing (e.g. to track the current inFlightMessages / requests).
	 * Any dynamic scaling on failed requests should be done here too.
     * @param requestInfo    Data class containing information on request completed
     */
    void completedRequest(RequestInfo requestInfo);

 	 /**
     * Decides whether the next request should be sent.
     * @param requestInfo    Data class containing information on request being sent
     */
    boolean shouldBlock(RequestInfo requestInfo);

	 /**
     * Returns the nextmax batch size to be used by the AsyncSinkWriter.
     */
    int getNextBatchSizegetMaxBatchSize();
}

/**
 * This data class encapsulates the information of starting / completing requests.
 */
public final class RequestInfo {
	public int failedMessages;
	public int batchSize;
	public long requestStartTime;
}