[P4RT] Separate entry update -> AppDB parsing and DB installation.

Author: kishanps

p4rt_app/p4runtime/BUILD.bazel

@@ -132,6 +132,7 @@ cc_library(
     srcs = ["p4runtime_impl.cc"],
     hdrs = ["p4runtime_impl.h"],
     deps = [
+        ":entity_update",
         ":ir_translation",
         ":p4info_verification",
         ":p4runtime_read",
@@ -156,7 +157,6 @@ cc_library(
         "//p4rt_app/sonic:response_handler",
         "//p4rt_app/sonic:state_verification",
         "//p4rt_app/sonic:vrf_entry_translation",
-        "//p4rt_app/sonic/adapters:table_adapter",
         "//p4rt_app/sonic/adapters:warm_boot_state_adapter",
         "//p4rt_app/utils:event_data_tracker",
         "//p4rt_app/utils:status_utility",
@@ -342,11 +342,11 @@ cc_library(
     srcs = ["resource_utilization.cc"],
     hdrs = ["resource_utilization.h"],
     deps = [
+        ":entity_update",
         "//gutil:collections",
         "//gutil:status",
         "//p4_pdpi:entity_keys",
         "//p4_pdpi:ir_cc_proto",
-        "//p4rt_app/sonic:app_db_manager",
         "@com_github_google_glog//:glog",
         "@com_github_p4lang_p4runtime//:p4info_cc_proto",
         "@com_github_p4lang_p4runtime//:p4runtime_cc_proto",
@@ -360,14 +360,14 @@ cc_test(
     name = "resource_utilization_test",
     srcs = ["resource_utilization_test.cc"],
     deps = [
+        ":entity_update",
         ":resource_utilization",
         "//gutil:collections",
         "//gutil:status",
         "//gutil:status_matchers",
         "//p4_pdpi:entity_keys",
         "//p4_pdpi:ir",
         "//p4_pdpi:ir_cc_proto",
-        "//p4rt_app/sonic:app_db_manager",
         "//sai_p4/instantiations/google:instantiations",
         "//sai_p4/instantiations/google:sai_p4info_cc",
         "@com_github_p4lang_p4runtime//:p4runtime_cc_proto",
@@ -439,3 +439,14 @@ cc_test(
         "@com_google_googletest//:gtest_main",
     ],
 )
+
+cc_library(
+    name = "entity_update",
+    hdrs = ["entity_update.h"],
+    deps = [
+        "//p4_pdpi:entity_keys",
+        "//p4_pdpi:ir_cc_proto",
+        "//p4rt_app/sonic:app_db_manager",
+        "@com_github_p4lang_p4runtime//:p4runtime_cc_proto",
+    ],
+)

p4rt_app/p4runtime/entity_update.h

@@ -0,0 +1,81 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#ifndef PINS_INFRA_P4RT_APP_P4RUNTIME_UPDATE_H_
+#define PINS_INFRA_P4RT_APP_P4RUNTIME_UPDATE_H_
+
+#include <cstdint>
+#include <optional>
+#include <string>
+
+#include "p4/v1/p4runtime.pb.h"
+#include "p4_pdpi/entity_keys.h"
+#include "p4_pdpi/ir.pb.h"
+#include "p4rt_app/sonic/app_db_manager.h"
+
+namespace p4rt_app {
+
+// This file defines data structures for managing individual update requests
+// from P4.
+
+// Action profiles are used to model things like WCMP where we can have multiple
+// actions with different weights. Resource accounting can be measured either
+// against the total number of actions, or the sum total of all the action
+// weights.
+struct ActionProfileResources {
+  std::string name;
+  int32_t number_of_actions = 0;
+  int64_t total_weight = 0;
+};
+
+// Each table resource usually only counts as 1 (i.e. one table entry), but
+// depending on the table they may include an action profile (e.g. WCMP).
+struct TableResources {
+  std::string name;
+  std::optional<ActionProfileResources> action_profile;
+};
+
+// This struct holds all the information needed to process a P4 update in P4RT.
+struct EntityUpdate {
+  // The IR translation of the PI request.
+  pdpi::IrEntity entry;
+
+  // Specifies if this request is an INSERT MODIFY or DELETE.
+  p4::v1::Update::Type update_type;
+
+  // Normalized PI entities. Note this will be semantically the same as the
+  // original request, but does not have to be syntactically the same.
+  p4::v1::Entity pi_entity;
+
+  // A unique hash of the entries match fields. Used to identify duplicates and
+  // any caching of entries.
+  pdpi::EntityKey entity_key;
+
+  // The net utilization change for table entries with group actions. If the
+  // update_type is an insert then this value will simply be the resources for
+  // the entry. If the update_type is a modify then this value is the difference
+  // between the new and old entries. If the update_type is a delete then this
+  // value is the resources of the old entry.
+  // Note: This is only relevant at the moment for tables with action profiles.
+  TableResources resource_utilization_change;
+
+  // The AppDb format of for this update.
+  sonic::AppDbUpdate app_db_update;
+
+  // A pointer to the response in the IrWriteResponse for this update.
+  pdpi::IrUpdateStatus* status;
+};
+
+}  // namespace p4rt_app
+
+#endif  // PINS_INFRA_P4RT_APP_P4RUNTIME_UPDATE_H_