utilities: Add support for registering use cases

CMakeLists.txt

@@ -1003,6 +1003,7 @@ set(SOURCES
         utilities/transactions/write_unprepared_txn.cc
         utilities/transactions/write_unprepared_txn_db.cc
         utilities/ttl/db_ttl_impl.cc
+        utilities/use_cases.cc
         utilities/wal_filter.cc
         utilities/write_batch_with_index/write_batch_with_index.cc
         utilities/write_batch_with_index/write_batch_with_index_internal.cc)

utilities/use_cases.cc

@@ -0,0 +1,169 @@
+#include <memory>
+#include <set>
+#include <string>
+#include <vector>
+#include <iostream>
+
+#include "rocksdb/db_crashtest_use_case.h"
+#include "rocksdb/options.h"
+#include "rocksdb/use_case.h"
+#include "rocksdb/utilities/customizable_util.h"
+#include "rocksdb/utilities/options_type.h"
+
+namespace ROCKSDB_NAMESPACE {
+Status ToUseCases(const ConfigOptions& cfg_opts, const std::string& value,
+                  std::vector<std::shared_ptr<UseCase>>& use_cases) {
+  Status status;
+  for (size_t start = 0, end = 0;
+       status.ok() && start < value.size() && end != std::string::npos;
+       start = end + 1) {
+    std::string token;
+    status = OptionTypeInfo::NextToken(value, ',', start, &end, &token);
+    if (status.ok()) {
+      if (token.find('*') == std::string::npos) {
+        std::shared_ptr<UseCase> use_case;
+        status = UseCase::CreateFromString(cfg_opts, token, &use_case);
+        if (status.ok() && use_case) {
+          use_cases.push_back(use_case);
+        }
+      } else {
+        // TODO: Pattern match on the factory names in factories to match the
+        // token
+        // std::vector<std::string> factories;
+        // ObjectRegistry::Default()->GetFactoryNames(UseCase::Type(), &factories);
+        // return bad status (some sort)
+      }
+    }
+  }
+  return status;
+}
+
+static int RegisterBuiltinDBCrashtestUseCases(ObjectLibrary& library,
+                                              const std::string& arg) {
+  library.AddFactory<UseCase>(
+      SimpleDefaultParams::kClassName(),
+      [](const std::string& /*uri*/,
+         std::unique_ptr<UseCase>* guard,
+         std::string* /*errmsg*/) {
+        guard->reset(new SimpleDefaultParams());
+        return guard->get();
+      });
+  library.AddFactory<UseCase>(
+      TxnParams::kClassName(),
+      [](const std::string& /*uri*/,
+         std::unique_ptr<UseCase>* guard,
+         std::string* /*errmsg*/) {
+        guard->reset(new TxnParams());
+        return guard->get();
+      });
+  library.AddFactory<UseCase>(
+      BestEffortsRecoveryParams::kClassName(),
+      [](const std::string& /*uri*/,
+         std::unique_ptr<UseCase>* guard,
+         std::string* /*errmsg*/) {
+        guard->reset(new BestEffortsRecoveryParams());
+        return guard->get();
+      });
+  library.AddFactory<UseCase>(
+      BlobParams::kClassName(),
+      [](const std::string& /*uri*/,
+         std::unique_ptr<UseCase>* guard,
+         std::string* /*errmsg*/) {
+        guard->reset(new BlobParams());
+        return guard->get();
+      });
+  library.AddFactory<UseCase>(
+      TieredParams::kClassName(),
+      [](const std::string& /*uri*/,
+         std::unique_ptr<UseCase>* guard,
+         std::string* /*errmsg*/) {
+        guard->reset(new TieredParams());
+        return guard->get();
+      });
+  library.AddFactory<DBCrashtestUseCase>(
+      MultiopsTxnDefaultParams::kClassName(),
+      [](const std::string& /*uri*/,
+         std::unique_ptr<DBCrashtestUseCase>* guard,
+         std::string* /*errmsg*/) {
+        guard->reset(new MultiopsTxnDefaultParams());
+        return guard->get();
+      });
+  return 1;
+}
+
+static int RegisterBuiltinUseCases(ObjectLibrary& library,
+                                   const std::string& arg) {
+  library.AddFactory<UseCase>(
+      DBCrashtestUseCase::kClassName(),
+      [](const std::string& /*uri*/,
+         std::unique_ptr<UseCase>* guard,
+         std::string* /*errmsg*/) {
+         guard->reset(new DBCrashtestUseCase());
+        return guard->get();
+      });
+  RegisterBuiltinDBCrashtestUseCases(library, arg);
+  return 1;
+}
+
+Status UseCase::CreateFromString(const ConfigOptions& cfg_opts,
+                                 const std::string& value,
+                                 std::shared_ptr<UseCase>* result) {
+  static std::once_flag once;
+  std::call_once(once, [&]() {
+    RegisterBuiltinUseCases(*(ObjectLibrary::Default().get()), "");
+  });
+  Status status =
+      LoadSharedObject<UseCase>(cfg_opts, value, result);
+  return status;
+}
+
+Status UseCase::ValidateOptions(const ConfigOptions& cfg_opts,
+                                const std::string& validate_against, 
+                                const DBOptions& db_opts,
+                                std::set<std::string>& valid_opts,
+                                std::set<std::string>& invalid_opts) {
+  std::vector<std::shared_ptr<UseCase>> use_cases;
+  Status s = ToUseCases(cfg_opts, validate_against, use_cases);
+  if (s.ok()) {
+    for (const auto& use_case : use_cases) {
+      use_case->Validate(cfg_opts, db_opts, valid_opts, invalid_opts);
+    }
+    if (!invalid_opts.empty()) {
+      s = Status::InvalidArgument();
+    }
+  }
+  return s;
+}
+
+Status UseCase::ValidateOptions(const ConfigOptions& cfg_opts,
+                                const std::string& validate_against,
+                                const ColumnFamilyOptions& cf_opts,
+                                std::set<std::string>& valid_opts,
+                                std::set<std::string>& invalid_opts) {
+  std::vector<std::shared_ptr<UseCase>> use_cases;
+  Status s = ToUseCases(cfg_opts, validate_against, use_cases);
+  if (s.ok()) {
+    for (const auto& use_case : use_cases) {
+      use_case->Validate(cfg_opts, cf_opts, valid_opts, invalid_opts);
+    }
+    if (!invalid_opts.empty()) {
+      s = Status::InvalidArgument();
+    }
+  }
+  return s;
+}
+
+Status UseCase::ValidateOptions(const ConfigOptions& cfg_opts,
+                                const std::string& validate_against,
+                                const Options& opts,
+                                std::set<std::string>& valid_opts,
+                                std::set<std::string>& invalid_opts) {
+  const DBOptions* db_opts = &opts;
+  const ColumnFamilyOptions* cf_opts = &opts;
+  Status s = ValidateOptions(cfg_opts, validate_against, *db_opts, valid_opts, invalid_opts);
+  if (s.ok()) {
+    s = ValidateOptions(cfg_opts, validate_against, *cf_opts, valid_opts, invalid_opts);
+  }
+  return s;
+}
+}  // namespace ROCKSDB_NAMESPACE