Merge pull request #14 from zanfranceschi/main

Rebasing my side

.github/pull_request_template.md

@@ -7,3 +7,4 @@
 - [ ] Não estou alterando arquivos fora do ou dos meus diretórios de participação.
 - [ ] Testei pelo menos o funcionamento básico do `docker-compose.yml`, todos os serviços estão subindo e minha API respondendo na porta 9999.
 - [ ] Todas imagens contidas no `docker-compose.yml` funcionam na arquitetura linux/amd64.
+

participantes/.gitignore

@@ -2,6 +2,7 @@ isadora-souza-mongodb/init.sql
 diogoviana/storage
 diogoviana/tmp
 cleverton-rocha/postgresql.conf
+wosteimer/src
 ives-samuel-powershell/data
 ives-samuel-powershell/data/database.db
 ives-samuel-powershell/data/database.db-shm
@@ -40,4 +41,32 @@ AlcivanLucas/api_node/db/script.sql
 gldmelo/postgres.conf
 rizzo-nodejs/data
 rizzo-nodejs/data/pg
+edy-elixir-e-ranger-de-dentes/tmp
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/alexander@api02
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/alexander@api02/event_log_client2.DCL
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/alexander@api02/schema.DAT
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/alexander@api02/LATEST.LOG
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/alexander@api02/event_log_client4.DCD
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/alexander@api02/event_log_client5.DCL
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/alexander@api02/event_log_client4.DCL
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/alexander@api02/event_log_client5.DCD
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/alexander@api02/event_log_client3.DCD
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/alexander@api02/event_log_client2.DCD
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/alexander@api02/event_log_client1.DCD
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/alexander@api02/DECISION_TAB.LOG
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/alexander@api02/event_log_client3.DCL
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/diogenes@api01
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/diogenes@api01/event_log_client2.DCL
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/diogenes@api01/schema.DAT
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/diogenes@api01/LATEST.LOG
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/diogenes@api01/event_log_client4.DCD
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/diogenes@api01/event_log_client5.DCL
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/diogenes@api01/event_log_client4.DCL
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/diogenes@api01/event_log_client5.DCD
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/diogenes@api01/event_log_client3.DCD
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/diogenes@api01/event_log_client2.DCD
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/diogenes@api01/event_log_client1.DCD
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/diogenes@api01/DECISION_TAB.LOG
+edy-elixir-e-ranger-de-dentes/tmp/mnesia-data/diogenes@api01/event_log_client3.DCL
 jpaf/postgresql.conf

participantes/4emcos-golang/README.md

@@ -0,0 +1,11 @@
+## Submissão para Rinha de Backend, Segunda Edição: 2024/Q1 - Controle de Concorrência
+
+Submissão feita com:
+- `Go` para api com o framework `Gin Web Framework`
+- `nginx` como load balancer
+- `postgres` como banco de dados
+- [repositório da api](https://github.com/4emcos/rinha-de-backend-2024-q1-golang)
+
+
+[@4emcos](https://twitter.com/4emcos) @ twitter
+[@4emcos](https://www.linkedin.com/in/4emcos/) @ linkedin

participantes/4emcos-golang/ddl.sql

@@ -0,0 +1,103 @@
+SET timezone = 'America/Sao_Paulo';
+CREATE SCHEMA IF NOT EXISTS rinha;
+
+CREATE TABLE rinha.users
+(
+    id              SERIAL PRIMARY KEY,
+    limit_in_cents  INTEGER NOT NULL,
+    initial_balance INTEGER NOT NULL DEFAULT 0
+);
+
+INSERT INTO rinha.users (id, limit_in_cents, initial_balance)
+VALUES (DEFAULT, 1000 * 100, 0),
+       (DEFAULT, 800 * 100, 0),
+       (DEFAULT, 10000 * 100, 0),
+       (DEFAULT, 100000 * 100, 0),
+       (DEFAULT, 5000 * 100, 0);
+
+CREATE UNLOGGED TABLE rinha.history
+(
+    id          SERIAL PRIMARY KEY,
+    user_id     SMALLINT    NOT NULL,
+    value       INTEGER     NOT NULL,
+    type        CHAR(1)     NOT NULL,
+    description VARCHAR(10) NOT NULL,
+    do_at       TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+ALTER TABLE
+    rinha.history
+    SET
+        (autovacuum_enabled = false);
+
+CREATE INDEX idx_history ON rinha.history (user_id);
+
+
+CREATE OR REPLACE FUNCTION rinha.credit(
+    user_id_tx SMALLINT,
+    value_tx INT,
+    description_tx VARCHAR(10))
+    RETURNS TABLE
+            (
+                new_balance   INT,
+                success       BOOL,
+                current_limit INT
+            )
+    LANGUAGE plpgsql
+AS
+$$
+BEGIN
+    PERFORM pg_advisory_xact_lock(user_id_tx);
+
+    INSERT INTO rinha.history VALUES (DEFAULT, user_id_tx, value_tx, 'c', description_tx);
+
+    RETURN QUERY
+        UPDATE rinha.users
+            SET initial_balance = initial_balance + value_tx
+            WHERE id = user_id_tx
+            RETURNING initial_balance, TRUE, limit_in_cents;
+END;
+$$;
+
+CREATE OR REPLACE FUNCTION rinha.debit(
+    user_id_tx SMALLINT,
+    value_tx INT,
+    description_tx VARCHAR(10))
+    RETURNS TABLE
+            (
+                new_balance   INT,
+                success       BOOL,
+                current_limit INT
+            )
+    LANGUAGE plpgsql
+AS
+$$
+DECLARE
+    current_balance     int;
+    current_limit_value int;
+BEGIN
+    PERFORM pg_advisory_xact_lock(user_id_tx);
+
+    SELECT limit_in_cents,
+           initial_balance
+    INTO
+        current_limit_value,
+        current_balance
+    FROM rinha.users
+    WHERE id = user_id_tx;
+
+    IF current_balance - value_tx >= current_limit_value * -1 THEN
+        INSERT INTO rinha.history VALUES (DEFAULT, user_id_tx, value_tx, 'd', description_tx);
+
+        RETURN QUERY
+            UPDATE rinha.users
+                SET initial_balance = initial_balance - value_tx
+                WHERE id = user_id_tx
+                RETURNING initial_balance, TRUE, limit_in_cents;
+
+    ELSE
+        RETURN QUERY SELECT current_balance, FALSE, current_limit_value;
+    END IF;
+END;
+$$;
+