Merging upstream version 1.45.3+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 251 insertions, 0 deletions

diff --git a/src/fluent-bit/lib/librdkafka-2.1.0/examples/producer.c b/src/fluent-bit/lib/librdkafka-2.1.0/examples/producer.c
new file mode 100644
index 000000000..b6fb71150
--- /dev/null
+++ b/src/fluent-bit/lib/librdkafka-2.1.0/examples/producer.c
@@ -0,0 +1,251 @@
+/*
+ * librdkafka - Apache Kafka C library
+ *
+ * Copyright (c) 2017, Magnus Edenhill
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * Simple Apache Kafka producer
+ * using the Kafka driver from librdkafka
+ * (https://github.com/edenhill/librdkafka)
+ */
+
+#include <stdio.h>
+#include <signal.h>
+#include <string.h>
+
+
+/* Typical include path would be <librdkafka/rdkafka.h>, but this program
+ * is builtin from within the librdkafka source tree and thus differs. */
+#include "rdkafka.h"
+
+
+static volatile sig_atomic_t run = 1;
+
+/**
+ * @brief Signal termination of program
+ */
+static void stop(int sig) {
+        run = 0;
+        fclose(stdin); /* abort fgets() */
+}
+
+
+/**
+ * @brief Message delivery report callback.
+ *
+ * This callback is called exactly once per message, indicating if
+ * the message was succesfully delivered
+ * (rkmessage->err == RD_KAFKA_RESP_ERR_NO_ERROR) or permanently
+ * failed delivery (rkmessage->err != RD_KAFKA_RESP_ERR_NO_ERROR).
+ *
+ * The callback is triggered from rd_kafka_poll() and executes on
+ * the application's thread.
+ */
+static void
+dr_msg_cb(rd_kafka_t *rk, const rd_kafka_message_t *rkmessage, void *opaque) {
+        if (rkmessage->err)
+                fprintf(stderr, "%% Message delivery failed: %s\n",
+                        rd_kafka_err2str(rkmessage->err));
+        else
+                fprintf(stderr,
+                        "%% Message delivered (%zd bytes, "
+                        "partition %" PRId32 ")\n",
+                        rkmessage->len, rkmessage->partition);
+
+        /* The rkmessage is destroyed automatically by librdkafka */
+}
+
+
+
+int main(int argc, char **argv) {
+        rd_kafka_t *rk;        /* Producer instance handle */
+        rd_kafka_conf_t *conf; /* Temporary configuration object */
+        char errstr[512];      /* librdkafka API error reporting buffer */
+        char buf[512];         /* Message value temporary buffer */
+        const char *brokers;   /* Argument: broker list */
+        const char *topic;     /* Argument: topic to produce to */
+
+        /*
+         * Argument validation
+         */
+        if (argc != 3) {
+                fprintf(stderr, "%% Usage: %s <broker> <topic>\n", argv[0]);
+                return 1;
+        }
+
+        brokers = argv[1];
+        topic   = argv[2];
+
+
+        /*
+         * Create Kafka client configuration place-holder
+         */
+        conf = rd_kafka_conf_new();
+
+        /* Set bootstrap broker(s) as a comma-separated list of
+         * host or host:port (default port 9092).
+         * librdkafka will use the bootstrap brokers to acquire the full
+         * set of brokers from the cluster. */
+        if (rd_kafka_conf_set(conf, "bootstrap.servers", brokers, errstr,
+                              sizeof(errstr)) != RD_KAFKA_CONF_OK) {
+                fprintf(stderr, "%s\n", errstr);
+                return 1;
+        }
+
+        /* Set the delivery report callback.
+         * This callback will be called once per message to inform
+         * the application if delivery succeeded or failed.
+         * See dr_msg_cb() above.
+         * The callback is only triggered from rd_kafka_poll() and
+         * rd_kafka_flush(). */
+        rd_kafka_conf_set_dr_msg_cb(conf, dr_msg_cb);
+
+        /*
+         * Create producer instance.
+         *
+         * NOTE: rd_kafka_new() takes ownership of the conf object
+         *       and the application must not reference it again after
+         *       this call.
+         */
+        rk = rd_kafka_new(RD_KAFKA_PRODUCER, conf, errstr, sizeof(errstr));
+        if (!rk) {
+                fprintf(stderr, "%% Failed to create new producer: %s\n",
+                        errstr);
+                return 1;
+        }
+
+        /* Signal handler for clean shutdown */
+        signal(SIGINT, stop);
+
+        fprintf(stderr,
+                "%% Type some text and hit enter to produce message\n"
+                "%% Or just hit enter to only serve delivery reports\n"
+                "%% Press Ctrl-C or Ctrl-D to exit\n");
+
+        while (run && fgets(buf, sizeof(buf), stdin)) {
+                size_t len = strlen(buf);
+                rd_kafka_resp_err_t err;
+
+                if (buf[len - 1] == '\n') /* Remove newline */
+                        buf[--len] = '\0';
+
+                if (len == 0) {
+                        /* Empty line: only serve delivery reports */
+                        rd_kafka_poll(rk, 0 /*non-blocking */);
+                        continue;
+                }
+
+                /*
+                 * Send/Produce message.
+                 * This is an asynchronous call, on success it will only
+                 * enqueue the message on the internal producer queue.
+                 * The actual delivery attempts to the broker are handled
+                 * by background threads.
+                 * The previously registered delivery report callback
+                 * (dr_msg_cb) is used to signal back to the application
+                 * when the message has been delivered (or failed).
+                 */
+        retry:
+                err = rd_kafka_producev(
+                    /* Producer handle */
+                    rk,
+                    /* Topic name */
+                    RD_KAFKA_V_TOPIC(topic),
+                    /* Make a copy of the payload. */
+                    RD_KAFKA_V_MSGFLAGS(RD_KAFKA_MSG_F_COPY),
+                    /* Message value and length */
+                    RD_KAFKA_V_VALUE(buf, len),
+                    /* Per-Message opaque, provided in
+                     * delivery report callback as
+                     * msg_opaque. */
+                    RD_KAFKA_V_OPAQUE(NULL),
+                    /* End sentinel */
+                    RD_KAFKA_V_END);
+
+                if (err) {
+                        /*
+                         * Failed to *enqueue* message for producing.
+                         */
+                        fprintf(stderr,
+                                "%% Failed to produce to topic %s: %s\n", topic,
+                                rd_kafka_err2str(err));
+
+                        if (err == RD_KAFKA_RESP_ERR__QUEUE_FULL) {
+                                /* If the internal queue is full, wait for
+                                 * messages to be delivered and then retry.
+                                 * The internal queue represents both
+                                 * messages to be sent and messages that have
+                                 * been sent or failed, awaiting their
+                                 * delivery report callback to be called.
+                                 *
+                                 * The internal queue is limited by the
+                                 * configuration property
+                                 * queue.buffering.max.messages and
+                                 * queue.buffering.max.kbytes */
+                                rd_kafka_poll(rk,
+                                              1000 /*block for max 1000ms*/);
+                                goto retry;
+                        }
+                } else {
+                        fprintf(stderr,
+                                "%% Enqueued message (%zd bytes) "
+                                "for topic %s\n",
+                                len, topic);
+                }
+
+
+                /* A producer application should continually serve
+                 * the delivery report queue by calling rd_kafka_poll()
+                 * at frequent intervals.
+                 * Either put the poll call in your main loop, or in a
+                 * dedicated thread, or call it after every
+                 * rd_kafka_produce() call.
+                 * Just make sure that rd_kafka_poll() is still called
+                 * during periods where you are not producing any messages
+                 * to make sure previously produced messages have their
+                 * delivery report callback served (and any other callbacks
+                 * you register). */
+                rd_kafka_poll(rk, 0 /*non-blocking*/);
+        }
+
+
+        /* Wait for final messages to be delivered or fail.
+         * rd_kafka_flush() is an abstraction over rd_kafka_poll() which
+         * waits for all messages to be delivered. */
+        fprintf(stderr, "%% Flushing final messages..\n");
+        rd_kafka_flush(rk, 10 * 1000 /* wait for max 10 seconds */);
+
+        /* If the output queue is still not empty there is an issue
+         * with producing messages to the clusters. */
+        if (rd_kafka_outq_len(rk) > 0)
+                fprintf(stderr, "%% %d message(s) were not delivered\n",
+                        rd_kafka_outq_len(rk));
+
+        /* Destroy the producer instance */
+        rd_kafka_destroy(rk);
+
+        return 0;
+}