schema_crash.c

/*
  This is free and unencumbered software released into the public domain.

  Anyone is free to copy, modify, publish, use, compile, sell, or
  distribute this software, either in source code form or as a compiled
  binary, for any purpose, commercial or non-commercial, and by any
  means.

  In jurisdictions that recognize copyright laws, the author or authors
  of this software dedicate any and all copyright interest in the
  software to the public domain. We make this dedication for the benefit
  of the public at large and to the detriment of our heirs and
  successors. We intend this dedication to be an overt act of
  relinquishment in perpetuity of all present and future rights to this
  software under copyright law.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  OTHER DEALINGS IN THE SOFTWARE.

  For more information, please refer to <http://unlicense.org/>
*/

#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#include "cassandra.h"

void print_error(CassFuture* future) {
  const char* message;
  size_t message_length;
  cass_future_error_message(future, &message, &message_length);
  fprintf(stderr, "Error: %.*s\n", (int)message_length, message);
}

CassCluster* create_cluster(const char* hosts) {
  CassCluster* cluster = cass_cluster_new();
  cass_cluster_set_contact_points(cluster, hosts);
  return cluster;
}

CassError connect_session(CassSession* session, const CassCluster* cluster) {
  CassError rc = CASS_OK;
  CassFuture* future = cass_session_connect(session, cluster);

  cass_future_wait(future);
  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
    print_error(future);
  }
  cass_future_free(future);

  return rc;
}

CassError execute_query(CassSession* session, const char* query) {
  CassError rc = CASS_OK;
  CassFuture* future = NULL;
  CassStatement* statement = cass_statement_new(query, 0);

  future = cass_session_execute(session, statement);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
    print_error(future);
  }

  cass_future_free(future);
  cass_statement_free(statement);

  return rc;
}

int main(int argc, char* argv[]) {
  CassCluster* cluster = NULL;
  CassSession* session = cass_session_new();
  char* hosts = "192.168.56.1";

  cass_log_set_level(CASS_LOG_INFO);

  if (argc > 1) {
    hosts = argv[1];
  }
  cluster = create_cluster(hosts);

  if (connect_session(session, cluster) != CASS_OK) {
    cass_cluster_free(cluster);
    cass_session_free(session);
    return -1;
  }

  execute_query(session, "DROP KEYSPACE test");

  execute_query(session,
                "CREATE KEYSPACE test WITH replication = { \
                           'class': 'SimpleStrategy', 'replication_factor': '1' };");
  
  execute_query(session, "USE test;");

  execute_query(session, 
                "CREATE TABLE schema_meta (key text, "
                "value bigint, "
                "PRIMARY KEY (key));");

  execute_query(session, 
                "CREATE FUNCTION avg_state(state tuple<int, bigint>, val int) "
                "CALLED ON NULL INPUT RETURNS tuple<int, bigint> "
                "LANGUAGE java AS "
                "  'if (val != null) { "
                "    state.setInt(0, state.getInt(0) + 1); "
                "    state.setLong(1, state.getLong(1) + val.intValue()); "
                "  } ;"
                "  return state;'"
                ";");
  execute_query(session, 
                "CREATE FUNCTION avg_final (state tuple<int, bigint>) "
                "CALLED ON NULL INPUT RETURNS double "
                "LANGUAGE java AS "
                "  'double r = 0; "
                "  if (state.getInt(0) == 0) return null; "
                "  r = state.getLong(1); "
                "  r /= state.getInt(0); "
                "  return Double.valueOf(r);' "
                ";");

  execute_query(session, 
                "CREATE AGGREGATE average(int) "
                "SFUNC avg_state STYPE tuple<int, bigint> FINALFUNC avg_final "
                "INITCOND(0, 0);");

  execute_query(session, 
                "CREATE MATERIALIZED VIEW schema_meta_by_value "
                "AS SELECT value "
                "   FROM schema_meta "
                "   WHERE value IS NOT NULL and key IS NOT NULL "
                "PRIMARY KEY(value, key)"
               );

  execute_query(session, 
                "CREATE TYPE address (street text, city text)"
               );

  execute_query(session, 
                "CREATE INDEX schema_meta_index "
                "ON schema_meta (value)"
               );

  {
    const char* keyspace = "test";
    const char* table = "schema_meta";
    const char* index = "schema_meta_index";
    const CassSchemaMeta* schema_meta = cass_session_get_schema_meta(session);
    const CassKeyspaceMeta* keyspace_meta = cass_schema_meta_keyspace_by_name(schema_meta, keyspace);

    if (keyspace_meta != NULL) {
      printf("Found keyspace \"%s\"\n", keyspace);
    } else {
      fprintf(stderr, "Unable to find \"%s\" keyspace in the schema metadata\n", keyspace);
    }

    const CassTableMeta* table_meta = cass_keyspace_meta_table_by_name(keyspace_meta, table);

    if (table_meta != NULL) {
      printf("Found table \"%s\"\n", table);
    } else {
      fprintf(stderr, "Unable to find \"%s\" table in the schema metadata\n", table);
    }

    const CassIndexMeta* index_meta = cass_table_meta_index_by_name(table_meta, index);

    if (index_meta != NULL) {
      printf("Found index \"%s\"\n", index);
    } else {
      fprintf(stderr, "Unable to find \"%s\" index in the schema metadata\n", index);
    }

    cass_schema_meta_free(schema_meta);
  }

  execute_query(session, "DROP KEYSPACE test");

  cass_cluster_free(cluster);
  cass_session_free(session);

  return 0;
}