lib-dict: Add dict-fail driver

It can be used for providing various failures

diff --git a/src/lib-dict/Makefile.am b/src/lib-dict/Makefile.am
index f7173a19bc356c3d41e1018858f86ac7233a3d4e..827071de84925fd490bd965af37e8f366b1d32a5 100644 (file)
--- a/src/lib-dict/Makefile.am
+++ b/src/lib-dict/Makefile.am
@@ -14,6 +14,7 @@ base_sources = \
        dict-memcached.c \
        dict-memcached-ascii.c \
        dict-redis.c \
+       dict-fail.c \
        dict-transaction-memory.c
 
 libdict_la_SOURCES = \

diff --git a/src/lib-dict/dict-fail.c b/src/lib-dict/dict-fail.c
new file mode 100644 (file)
index 0000000..34a9a99
--- /dev/null
+++ b/src/lib-dict/dict-fail.c
@@ -0,0 +1,129 @@
+/* Copyright (c) 2017 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "dict.h"
+#include "dict-private.h"
+
+struct dict_iterate_context dict_iter_unsupported =
+{
+       .dict = &dict_driver_fail,
+};
+
+struct dict_transaction_context dict_transaction_unsupported =
+{
+        .dict = &dict_driver_fail,
+};
+
+static int dict_fail_init(struct dict *dict_driver ATTR_UNUSED,
+                         const char *uri ATTR_UNUSED,
+                         const struct dict_settings *set ATTR_UNUSED,
+                         struct dict **dict_r ATTR_UNUSED, const char **error_r)
+{
+       *error_r = "Unsupported operation (dict does not support this feature)";
+       return -1;
+}
+
+static void dict_fail_deinit(struct dict *dict ATTR_UNUSED)
+{
+}
+
+static void dict_fail_wait(struct dict *dict ATTR_UNUSED)
+{
+}
+
+static int dict_fail_lookup(struct dict *dict ATTR_UNUSED, pool_t pool ATTR_UNUSED,
+                           const char *key ATTR_UNUSED, const char **value_r ATTR_UNUSED,
+                           const char **error_r)
+{
+       *error_r = "Unsupported operation (dict does not support this feature)";
+       return -1;
+}
+
+static struct dict_iterate_context *
+dict_fail_iterate_init(struct dict *dict ATTR_UNUSED, const char *const *paths ATTR_UNUSED,
+                      enum dict_iterate_flags flags ATTR_UNUSED)
+{
+       return &dict_iter_unsupported;
+}
+
+static bool dict_fail_iterate(struct dict_iterate_context *ctx ATTR_UNUSED,
+                             const char **key_r ATTR_UNUSED, const char **value_r ATTR_UNUSED)
+{
+       return FALSE;
+}
+
+static int dict_fail_iterate_deinit(struct dict_iterate_context *ctx ATTR_UNUSED,
+                                   const char **error_r)
+{
+       *error_r = "Unsupported operation (dict does not support this feature)";
+       return -1;
+}
+
+static struct dict_transaction_context *dict_fail_transaction_init(struct dict *dict ATTR_UNUSED)
+{
+       return &dict_transaction_unsupported;
+}
+
+static void dict_fail_transaction_commit(struct dict_transaction_context *ctx ATTR_UNUSED,
+                                        bool async ATTR_UNUSED,
+                                        dict_transaction_commit_callback_t *callback,
+                                        void *context)
+{
+       struct dict_commit_result res = {
+               .ret = DICT_COMMIT_RET_FAILED,
+               .error = "Unsupported operation (dict does not support this feature)"
+       };
+       if (callback != NULL)
+               callback(&res, context);
+}
+
+static void dict_fail_transaction_rollback(struct dict_transaction_context *ctx ATTR_UNUSED)
+{
+}
+
+static void dict_fail_set(struct dict_transaction_context *ctx ATTR_UNUSED,
+                         const char *key ATTR_UNUSED, const char *value ATTR_UNUSED)
+{
+}
+
+static void dict_fail_unset(struct dict_transaction_context *ctx ATTR_UNUSED,
+                           const char *key ATTR_UNUSED)
+{
+}
+
+static void dict_fail_atomic_inc(struct dict_transaction_context *ctx ATTR_UNUSED,
+                                const char *key ATTR_UNUSED, long long diff ATTR_UNUSED)
+{
+}
+
+static bool dict_fail_switch_ioloop(struct dict *dict ATTR_UNUSED)
+{
+       return TRUE;
+}
+
+static void dict_fail_set_timestamp(struct dict_transaction_context *ctx ATTR_UNUSED,
+                                   const struct timespec *ts ATTR_UNUSED)
+{
+}
+
+struct dict dict_driver_fail = {
+       .name = "fail",
+       .v = {
+               .init = dict_fail_init,
+               .deinit = dict_fail_deinit,
+               .wait = dict_fail_wait,
+               .lookup = dict_fail_lookup,
+               .iterate_init = dict_fail_iterate_init,
+               .iterate = dict_fail_iterate,
+               .iterate_deinit = dict_fail_iterate_deinit,
+               .transaction_init = dict_fail_transaction_init,
+               .transaction_commit = dict_fail_transaction_commit,
+               .transaction_rollback = dict_fail_transaction_rollback,
+               .set = dict_fail_set,
+               .unset = dict_fail_unset,
+               .atomic_inc = dict_fail_atomic_inc,
+               .lookup_async = NULL,
+               .switch_ioloop = dict_fail_switch_ioloop,
+               .set_timestamp = dict_fail_set_timestamp
+       },
+};

diff --git a/src/lib-dict/dict-private.h b/src/lib-dict/dict-private.h
index 1575e887ac1c5b5f4fbc90d0808d97b17a963be7..06f58b8489143fb0a8385b4419cd49d67b5fe2c9 100644 (file)
--- a/src/lib-dict/dict-private.h
+++ b/src/lib-dict/dict-private.h
@@ -82,5 +82,9 @@ extern struct dict dict_driver_memcached;
 extern struct dict dict_driver_memcached_ascii;
 extern struct dict dict_driver_redis;
 extern struct dict dict_driver_cdb;
+extern struct dict dict_driver_fail;
+
+extern struct dict_iterate_context dict_iter_unsupported;
+extern struct dict_transaction_context dict_transaction_unsupported;
 
 #endif