492 lines
16 KiB
C
492 lines
16 KiB
C
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/*
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* librdkafka - Apache Kafka C library
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*
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* Copyright (c) 2019-2022, Magnus Edenhill
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* 2023, Confluent Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _RDKAFKA_MOCK_H_
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#define _RDKAFKA_MOCK_H_
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#ifndef _RDKAFKA_H_
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#error "rdkafka_mock.h must be included after rdkafka.h"
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#endif
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#ifdef __cplusplus
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extern "C" {
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#if 0
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} /* Restore indent */
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#endif
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#endif
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/**
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* @name Mock cluster
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*
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* Provides a mock Kafka cluster with a configurable number of brokers
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* that support a reasonable subset of Kafka protocol operations,
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* error injection, etc.
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*
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* There are two ways to use the mock clusters, the most simple approach
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* is to configure `test.mock.num.brokers` (to e.g. 3) on the rd_kafka_t
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* in an existing application, which will replace the configured
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* `bootstrap.servers` with the mock cluster brokers.
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* This approach is convenient to easily test existing applications.
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*
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* The second approach is to explicitly create a mock cluster on an
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* rd_kafka_t instance by using rd_kafka_mock_cluster_new().
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*
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* Mock clusters provide localhost listeners that can be used as the bootstrap
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* servers by multiple rd_kafka_t instances.
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*
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* Currently supported functionality:
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* - Producer
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* - Idempotent Producer
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* - Transactional Producer
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* - Low-level consumer
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* - High-level balanced consumer groups with offset commits
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* - Topic Metadata and auto creation
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* - Telemetry (KIP-714)
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*
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* @remark This is an experimental public API that is NOT covered by the
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* librdkafka API or ABI stability guarantees.
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*
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*
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* @warning THIS IS AN EXPERIMENTAL API, SUBJECT TO CHANGE OR REMOVAL.
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*
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* @{
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*/
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typedef struct rd_kafka_mock_cluster_s rd_kafka_mock_cluster_t;
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/**
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* @brief Create new mock cluster with \p broker_cnt brokers.
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*
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* The broker ids will start at 1 up to and including \p broker_cnt.
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*
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* The \p rk instance is required for internal book keeping but continues
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* to operate as usual.
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*/
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RD_EXPORT
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rd_kafka_mock_cluster_t *rd_kafka_mock_cluster_new(rd_kafka_t *rk,
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int broker_cnt);
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/**
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* @brief Destroy mock cluster.
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*/
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RD_EXPORT
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void rd_kafka_mock_cluster_destroy(rd_kafka_mock_cluster_t *mcluster);
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/**
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* @returns the rd_kafka_t instance for a cluster as passed to
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* rd_kafka_mock_cluster_new().
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*/
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RD_EXPORT rd_kafka_t *
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rd_kafka_mock_cluster_handle(const rd_kafka_mock_cluster_t *mcluster);
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/**
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* @returns the rd_kafka_mock_cluster_t instance as created by
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* setting the `test.mock.num.brokers` configuration property,
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* or NULL if no such instance.
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*/
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RD_EXPORT rd_kafka_mock_cluster_t *
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rd_kafka_handle_mock_cluster(const rd_kafka_t *rk);
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/**
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* @returns the mock cluster's bootstrap.servers list
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*/
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RD_EXPORT const char *
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rd_kafka_mock_cluster_bootstraps(const rd_kafka_mock_cluster_t *mcluster);
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/**
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* @brief Clear the cluster's error state for the given \p ApiKey.
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*/
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RD_EXPORT
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void rd_kafka_mock_clear_request_errors(rd_kafka_mock_cluster_t *mcluster,
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int16_t ApiKey);
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/**
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* @brief Push \p cnt errors in the \p ... va-arg list onto the cluster's
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* error stack for the given \p ApiKey.
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*
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* \p ApiKey is the Kafka protocol request type, e.g., ProduceRequest (0).
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*
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* The following \p cnt protocol requests matching \p ApiKey will fail with the
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* provided error code and removed from the stack, starting with
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* the first error code, then the second, etc.
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*
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* Passing \c RD_KAFKA_RESP_ERR__TRANSPORT will make the mock broker
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* disconnect the client which can be useful to trigger a disconnect on certain
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* requests.
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*/
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RD_EXPORT
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void rd_kafka_mock_push_request_errors(rd_kafka_mock_cluster_t *mcluster,
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int16_t ApiKey,
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size_t cnt,
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...);
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/**
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* @brief Same as rd_kafka_mock_push_request_errors() but takes
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* an array of errors.
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*/
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RD_EXPORT void
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rd_kafka_mock_push_request_errors_array(rd_kafka_mock_cluster_t *mcluster,
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int16_t ApiKey,
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size_t cnt,
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const rd_kafka_resp_err_t *errors);
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/**
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* @brief Apply broker configuration group.initial.rebalance.delay.ms
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* to the whole \p mcluster.
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*/
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RD_EXPORT void rd_kafka_mock_group_initial_rebalance_delay_ms(
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rd_kafka_mock_cluster_t *mcluster,
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int32_t delay_ms);
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/**
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* @brief Push \p cnt errors and RTT tuples in the \p ... va-arg list onto
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* the broker's error stack for the given \p ApiKey.
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*
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* \p ApiKey is the Kafka protocol request type, e.g., ProduceRequest (0).
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*
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* Each entry is a tuple of:
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* rd_kafka_resp_err_t err - error to return (or 0)
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* int rtt_ms - response RTT/delay in milliseconds (or 0)
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*
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* The following \p cnt protocol requests matching \p ApiKey will fail with the
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* provided error code and removed from the stack, starting with
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* the first error code, then the second, etc.
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*
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* @remark The broker errors take precedence over the cluster errors.
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*/
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RD_EXPORT rd_kafka_resp_err_t
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rd_kafka_mock_broker_push_request_error_rtts(rd_kafka_mock_cluster_t *mcluster,
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int32_t broker_id,
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int16_t ApiKey,
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size_t cnt,
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...);
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/**
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* @brief Get the count of errors in the broker's error stack for
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* the given \p ApiKey.
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*
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* @param mcluster the mock cluster.
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* @param broker_id id of the broker in the cluster.
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* @param ApiKey is the Kafka protocol request type, e.g., ProduceRequest (0).
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* @param cntp pointer for receiving the count.
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*
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* @returns \c RD_KAFKA_RESP_ERR_NO_ERROR if the count was retrieved,
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* \c RD_KAFKA_RESP_ERR__UNKNOWN_BROKER if there was no broker with this id,
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* \c RD_KAFKA_RESP_ERR__INVALID_ARG if some of the parameters are not valid.
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*/
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RD_EXPORT rd_kafka_resp_err_t
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rd_kafka_mock_broker_error_stack_cnt(rd_kafka_mock_cluster_t *mcluster,
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int32_t broker_id,
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int16_t ApiKey,
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size_t *cntp);
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/**
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* @brief Set the topic error to return in protocol requests.
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*
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* Currently only used for TopicMetadataRequest and AddPartitionsToTxnRequest.
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*/
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RD_EXPORT
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void rd_kafka_mock_topic_set_error(rd_kafka_mock_cluster_t *mcluster,
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const char *topic,
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rd_kafka_resp_err_t err);
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/**
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* @brief Creates a topic.
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*
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* This is an alternative to automatic topic creation as performed by
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* the client itself.
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*
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* @remark The Topic Admin API (CreateTopics) is not supported by the
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* mock broker.
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*/
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RD_EXPORT rd_kafka_resp_err_t
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rd_kafka_mock_topic_create(rd_kafka_mock_cluster_t *mcluster,
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const char *topic,
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int partition_cnt,
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int replication_factor);
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/**
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* @brief Sets the partition leader.
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*
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* The topic will be created if it does not exist.
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*
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* \p broker_id needs to be an existing broker, or -1 to make the
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* partition leader-less.
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*/
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RD_EXPORT rd_kafka_resp_err_t
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rd_kafka_mock_partition_set_leader(rd_kafka_mock_cluster_t *mcluster,
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const char *topic,
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int32_t partition,
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int32_t broker_id);
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/**
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* @brief Sets the partition's preferred replica / follower.
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*
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* The topic will be created if it does not exist.
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*
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* \p broker_id does not need to point to an existing broker.
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*/
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RD_EXPORT rd_kafka_resp_err_t
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rd_kafka_mock_partition_set_follower(rd_kafka_mock_cluster_t *mcluster,
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const char *topic,
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int32_t partition,
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int32_t broker_id);
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/**
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* @brief Sets the partition's preferred replica / follower low and high
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* watermarks.
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*
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* The topic will be created if it does not exist.
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*
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* Setting an offset to -1 will revert back to the leader's corresponding
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* watermark.
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*/
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RD_EXPORT rd_kafka_resp_err_t
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rd_kafka_mock_partition_set_follower_wmarks(rd_kafka_mock_cluster_t *mcluster,
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const char *topic,
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int32_t partition,
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int64_t lo,
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int64_t hi);
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/**
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* @brief Push \p cnt Metadata leader response
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* onto the cluster's stack for the given \p topic and \p partition.
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*
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* @param topic Topic to change
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* @param partition Partition to change in \p topic
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* @param leader_id Broker id of the leader node
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* @param leader_epoch Leader epoch corresponding to the given \p leader_id
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*
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* @return Push operation error code
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*/
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RD_EXPORT
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rd_kafka_resp_err_t
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rd_kafka_mock_partition_push_leader_response(rd_kafka_mock_cluster_t *mcluster,
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const char *topic,
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int partition,
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int32_t leader_id,
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int32_t leader_epoch);
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/**
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* @brief Disconnects the broker and disallows any new connections.
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* This does NOT trigger leader change.
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*
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* @param mcluster Mock cluster instance.
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* @param broker_id Use -1 for all brokers, or >= 0 for a specific broker.
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*/
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RD_EXPORT rd_kafka_resp_err_t
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rd_kafka_mock_broker_set_down(rd_kafka_mock_cluster_t *mcluster,
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int32_t broker_id);
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/**
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* @brief Makes the broker accept connections again.
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* This does NOT trigger leader change.
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*
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* @param mcluster Mock cluster instance.
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* @param broker_id Use -1 for all brokers, or >= 0 for a specific broker.
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*/
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RD_EXPORT rd_kafka_resp_err_t
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rd_kafka_mock_broker_set_up(rd_kafka_mock_cluster_t *mcluster,
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int32_t broker_id);
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/**
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* @brief Set broker round-trip-time delay in milliseconds.
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*
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* @param mcluster Mock cluster instance.
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* @param broker_id Use -1 for all brokers, or >= 0 for a specific broker.
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*/
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RD_EXPORT rd_kafka_resp_err_t
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rd_kafka_mock_broker_set_rtt(rd_kafka_mock_cluster_t *mcluster,
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int32_t broker_id,
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int rtt_ms);
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/**
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* @brief Sets the broker's rack as reported in Metadata to the client.
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*
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* @param mcluster Mock cluster instance.
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* @param broker_id Use -1 for all brokers, or >= 0 for a specific broker.
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*/
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RD_EXPORT rd_kafka_resp_err_t
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rd_kafka_mock_broker_set_rack(rd_kafka_mock_cluster_t *mcluster,
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int32_t broker_id,
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const char *rack);
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/**
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* @brief Explicitly sets the coordinator. If this API is not a standard
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* hashing scheme will be used.
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*
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* @param key_type "transaction" or "group"
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* @param key The transactional.id or group.id
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* @param broker_id The new coordinator, does not have to be a valid broker.
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*/
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RD_EXPORT rd_kafka_resp_err_t
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rd_kafka_mock_coordinator_set(rd_kafka_mock_cluster_t *mcluster,
|
||
|
|
const char *key_type,
|
||
|
|
const char *key,
|
||
|
|
int32_t broker_id);
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Set the allowed ApiVersion range for \p ApiKey.
|
||
|
|
*
|
||
|
|
* Set \p MinVersion and \p MaxVersion to -1 to disable the API
|
||
|
|
* completely.
|
||
|
|
*
|
||
|
|
* \p MaxVersion MUST not exceed the maximum implemented value,
|
||
|
|
* see rdkafka_mock_handlers.c.
|
||
|
|
*
|
||
|
|
* @param ApiKey Protocol request type/key
|
||
|
|
* @param MinVersion Minimum version supported (or -1 to disable).
|
||
|
|
* @param MinVersion Maximum version supported (or -1 to disable).
|
||
|
|
*/
|
||
|
|
RD_EXPORT rd_kafka_resp_err_t
|
||
|
|
rd_kafka_mock_set_apiversion(rd_kafka_mock_cluster_t *mcluster,
|
||
|
|
int16_t ApiKey,
|
||
|
|
int16_t MinVersion,
|
||
|
|
int16_t MaxVersion);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Start tracking RPC requests for this mock cluster.
|
||
|
|
* @sa rd_kafka_mock_get_requests to get the requests.
|
||
|
|
*/
|
||
|
|
RD_EXPORT
|
||
|
|
void rd_kafka_mock_start_request_tracking(rd_kafka_mock_cluster_t *mcluster);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Stop tracking RPC requests for this mock cluster.
|
||
|
|
* Does not clear already tracked requests.
|
||
|
|
*/
|
||
|
|
RD_EXPORT
|
||
|
|
void rd_kafka_mock_stop_request_tracking(rd_kafka_mock_cluster_t *mcluster);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @name Represents a request to the mock cluster along with a timestamp.
|
||
|
|
*/
|
||
|
|
typedef struct rd_kafka_mock_request_s rd_kafka_mock_request_t;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Destroy a rd_kafka_mock_request_t * and deallocate memory.
|
||
|
|
*/
|
||
|
|
RD_EXPORT void rd_kafka_mock_request_destroy(rd_kafka_mock_request_t *mreq);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Destroy a rd_kafka_mock_request_t * array and deallocate it.
|
||
|
|
*/
|
||
|
|
RD_EXPORT void
|
||
|
|
rd_kafka_mock_request_destroy_array(rd_kafka_mock_request_t **mreqs,
|
||
|
|
size_t mreq_cnt);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Get the broker id to which \p mreq was sent.
|
||
|
|
*/
|
||
|
|
RD_EXPORT int32_t rd_kafka_mock_request_id(rd_kafka_mock_request_t *mreq);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Get the ApiKey with which \p mreq was sent.
|
||
|
|
*/
|
||
|
|
RD_EXPORT int16_t rd_kafka_mock_request_api_key(rd_kafka_mock_request_t *mreq);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Get the timestamp in micros at which \p mreq was sent.
|
||
|
|
*/
|
||
|
|
RD_EXPORT int64_t
|
||
|
|
rd_kafka_mock_request_timestamp(rd_kafka_mock_request_t *mreq);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Get the list of requests sent to this mock cluster.
|
||
|
|
*
|
||
|
|
* @param cntp is set to the count of requests.
|
||
|
|
* @return List of rd_kafka_mock_request_t *.
|
||
|
|
* @remark each element of the returned array must be freed with
|
||
|
|
* rd_kafka_mock_request_destroy, and the list itself must be freed too.
|
||
|
|
*/
|
||
|
|
RD_EXPORT rd_kafka_mock_request_t **
|
||
|
|
rd_kafka_mock_get_requests(rd_kafka_mock_cluster_t *mcluster, size_t *cntp);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Clear the list of requests sent to this mock broker, in case request
|
||
|
|
* tracking is/was turned on.
|
||
|
|
*/
|
||
|
|
RD_EXPORT void rd_kafka_mock_clear_requests(rd_kafka_mock_cluster_t *mcluster);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Set the metrics that are expected by the broker for telemetry
|
||
|
|
* collection.
|
||
|
|
*
|
||
|
|
* @param metrics List of prefixes of metric names or NULL.
|
||
|
|
* @param metrics_cnt
|
||
|
|
*
|
||
|
|
* @note if \p metrics is NULL, no metrics will be expected by the broker. If
|
||
|
|
* the first elements of \p metrics is an empty string, that indicates the
|
||
|
|
* broker expects all metrics.
|
||
|
|
*/
|
||
|
|
RD_EXPORT rd_kafka_resp_err_t
|
||
|
|
rd_kafka_mock_telemetry_set_requested_metrics(rd_kafka_mock_cluster_t *mcluster,
|
||
|
|
char **metrics,
|
||
|
|
size_t metrics_cnt);
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Set push frequency to be sent to the client for telemetry collection.
|
||
|
|
* when the broker receives GetTelemetrySubscription requests.
|
||
|
|
*
|
||
|
|
* @param push_interval_ms time for push in milliseconds. Must be more than 0.
|
||
|
|
*/
|
||
|
|
RD_EXPORT rd_kafka_resp_err_t
|
||
|
|
rd_kafka_mock_telemetry_set_push_interval(rd_kafka_mock_cluster_t *mcluster,
|
||
|
|
int64_t push_interval_ms);
|
||
|
|
/**@}*/
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
#endif /* _RDKAFKA_MOCK_H_ */
|