LCOV - code coverage report
Current view: top level - core/client_config - resolver_registry.c (source / functions) Hit Total Coverage
Test: tmp.CaZ6RjdVn2 Lines: 54 56 96.4 %
Date: 2015-12-10 22:15:08 Functions: 7 7 100.0 %

          Line data    Source code
       1             : /*
       2             :  *
       3             :  * Copyright 2015, Google Inc.
       4             :  * All rights reserved.
       5             :  *
       6             :  * Redistribution and use in source and binary forms, with or without
       7             :  * modification, are permitted provided that the following conditions are
       8             :  * met:
       9             :  *
      10             :  *     * Redistributions of source code must retain the above copyright
      11             :  * notice, this list of conditions and the following disclaimer.
      12             :  *     * Redistributions in binary form must reproduce the above
      13             :  * copyright notice, this list of conditions and the following disclaimer
      14             :  * in the documentation and/or other materials provided with the
      15             :  * distribution.
      16             :  *     * Neither the name of Google Inc. nor the names of its
      17             :  * contributors may be used to endorse or promote products derived from
      18             :  * this software without specific prior written permission.
      19             :  *
      20             :  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      21             :  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      22             :  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      23             :  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
      24             :  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      25             :  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      26             :  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      27             :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      28             :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      29             :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      30             :  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      31             :  *
      32             :  */
      33             : 
      34             : #include "src/core/client_config/resolver_registry.h"
      35             : 
      36             : #include <string.h>
      37             : 
      38             : #include <grpc/support/alloc.h>
      39             : #include <grpc/support/log.h>
      40             : #include <grpc/support/string_util.h>
      41             : 
      42             : #define MAX_RESOLVERS 10
      43             : 
      44             : static grpc_resolver_factory *g_all_of_the_resolvers[MAX_RESOLVERS];
      45             : static int g_number_of_resolvers = 0;
      46             : 
      47             : static char *g_default_resolver_prefix;
      48             : 
      49        3453 : void grpc_resolver_registry_init(const char *default_resolver_prefix) {
      50        3453 :   g_number_of_resolvers = 0;
      51        3453 :   g_default_resolver_prefix = gpr_strdup(default_resolver_prefix);
      52        3453 : }
      53             : 
      54        3451 : void grpc_resolver_registry_shutdown(void) {
      55             :   int i;
      56       17251 :   for (i = 0; i < g_number_of_resolvers; i++) {
      57       13800 :     grpc_resolver_factory_unref(g_all_of_the_resolvers[i]);
      58             :   }
      59        3451 :   gpr_free(g_default_resolver_prefix);
      60        3451 : }
      61             : 
      62       13808 : void grpc_register_resolver_type(grpc_resolver_factory *factory) {
      63             :   int i;
      64       34520 :   for (i = 0; i < g_number_of_resolvers; i++) {
      65       20712 :     GPR_ASSERT(0 != strcmp(factory->vtable->scheme,
      66             :                            g_all_of_the_resolvers[i]->vtable->scheme));
      67             :   }
      68       13808 :   GPR_ASSERT(g_number_of_resolvers != MAX_RESOLVERS);
      69       13808 :   grpc_resolver_factory_ref(factory);
      70       13808 :   g_all_of_the_resolvers[g_number_of_resolvers++] = factory;
      71       13808 : }
      72             : 
      73        9978 : static grpc_resolver_factory *lookup_factory(grpc_uri *uri) {
      74             :   int i;
      75             : 
      76             :   /* handling NULL uri's here simplifies grpc_resolver_create */
      77        9978 :   if (!uri) return NULL;
      78             : 
      79       25472 :   for (i = 0; i < g_number_of_resolvers; i++) {
      80       22436 :     if (0 == strcmp(uri->scheme, g_all_of_the_resolvers[i]->vtable->scheme)) {
      81        5876 :       return g_all_of_the_resolvers[i];
      82             :     }
      83             :   }
      84             : 
      85        3134 :   return NULL;
      86             : }
      87             : 
      88        5878 : static grpc_resolver_factory *resolve_factory(const char *target,
      89             :                                               grpc_uri **uri) {
      90             :   char *tmp;
      91        5780 :   grpc_resolver_factory *factory = NULL;
      92             : 
      93        5878 :   GPR_ASSERT(uri != NULL);
      94        5878 :   *uri = grpc_uri_parse(target, 1);
      95        5878 :   factory = lookup_factory(*uri);
      96        5878 :   if (factory == NULL) {
      97        4100 :     if (g_default_resolver_prefix != NULL) {
      98        4100 :       grpc_uri_destroy(*uri);
      99        4100 :       gpr_asprintf(&tmp, "%s%s", g_default_resolver_prefix, target);
     100        4100 :       *uri = grpc_uri_parse(tmp, 1);
     101        4100 :       factory = lookup_factory(*uri);
     102        4100 :       if (factory == NULL) {
     103           2 :         grpc_uri_destroy(grpc_uri_parse(target, 0));
     104           2 :         grpc_uri_destroy(grpc_uri_parse(tmp, 0));
     105           2 :         gpr_log(GPR_ERROR, "don't know how to resolve '%s' or '%s'", target,
     106             :                 tmp);
     107             :       }
     108        4100 :       gpr_free(tmp);
     109             :     } else {
     110           0 :       grpc_uri_destroy(grpc_uri_parse(target, 0));
     111           0 :       gpr_log(GPR_ERROR, "don't know how to resolve '%s'", target);
     112             :     }
     113             :   }
     114        5878 :   return factory;
     115             : }
     116             : 
     117        2792 : grpc_resolver *grpc_resolver_create(
     118             :     const char *target, grpc_subchannel_factory *subchannel_factory) {
     119        2792 :   grpc_uri *uri = NULL;
     120        2792 :   grpc_resolver_factory *factory = resolve_factory(target, &uri);
     121             :   grpc_resolver *resolver;
     122             :   grpc_resolver_args args;
     123        2792 :   memset(&args, 0, sizeof(args));
     124        2792 :   args.uri = uri;
     125        2792 :   args.subchannel_factory = subchannel_factory;
     126        2792 :   resolver = grpc_resolver_factory_create_resolver(factory, &args);
     127        2792 :   grpc_uri_destroy(uri);
     128        2792 :   return resolver;
     129             : }
     130             : 
     131        3086 : char *grpc_get_default_authority(const char *target) {
     132        3086 :   grpc_uri *uri = NULL;
     133        3086 :   grpc_resolver_factory *factory = resolve_factory(target, &uri);
     134        3086 :   char *authority = grpc_resolver_factory_get_default_authority(factory, uri);
     135        3086 :   grpc_uri_destroy(uri);
     136        3086 :   return authority;
     137             : }

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