优化

file/src/main/resources/db/file.sql

@@ -77,6 +77,14 @@ CREATE TABLE IF NOT EXISTS file_export_task (
   content_type VARCHAR(128) NULL COMMENT '文件类型',
   size_bytes BIGINT UNSIGNED NULL COMMENT '文件字节数',
   failure_message VARCHAR(1000) NULL COMMENT '失败原因',
+  dispatch_version INT NOT NULL DEFAULT 1 COMMENT '派发版本，仅执行重试时递增',
+  attempt_count INT NOT NULL DEFAULT 0 COMMENT '已执行尝试次数',
+  max_attempts INT NOT NULL DEFAULT 3 COMMENT '自动重试上限',
+  next_retry_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) COMMENT '允许执行的最早时间',
+  lease_owner VARCHAR(128) NULL COMMENT '当前执行实例标识',
+  lease_until DATETIME(3) NULL COMMENT '执行租约截止时间',
+  last_heartbeat_at DATETIME(3) NULL COMMENT '最后心跳时间',
+  execution_deadline_at DATETIME(3) NULL COMMENT '本次执行截止时间',
   requested_by BIGINT UNSIGNED NOT NULL COMMENT '申请用户ID',
   requested_username VARCHAR(128) NULL COMMENT '申请账号快照',
   requested_at DATETIME(3) NOT NULL COMMENT '申请时间',
@@ -93,5 +101,40 @@ CREATE TABLE IF NOT EXISTS file_export_task (
   UNIQUE KEY uk_file_export_task_no (task_no),
   KEY idx_file_export_owner (tenant_id, app_code, requested_by, requested_at),
   KEY idx_file_export_status (status, requested_at),
+  KEY idx_file_export_dispatch (status, next_retry_at, id),
+  KEY idx_file_export_lease (status, lease_until),
   KEY idx_file_export_expiry (status, expires_at)
 ) ENGINE=InnoDB COMMENT='公共异步导出任务表';
+
+CREATE TABLE IF NOT EXISTS file_export_task_guard (
+  guard_key VARCHAR(64) NOT NULL COMMENT '任务创建串行化锁键',
+  updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
+  PRIMARY KEY (guard_key)
+) ENGINE=InnoDB COMMENT='导出任务创建并发保护表：低频创建入口使用单行锁保证重复提交及活动上限';
+
+INSERT IGNORE INTO file_export_task_guard (guard_key) VALUES ('GLOBAL_CREATE');
+
+CREATE TABLE IF NOT EXISTS file_export_outbox (
+  id BIGINT UNSIGNED NOT NULL COMMENT 'Outbox记录ID',
+  event_id VARCHAR(64) NOT NULL COMMENT '投递意图唯一标识',
+  task_id BIGINT UNSIGNED NOT NULL COMMENT '关联导出任务ID',
+  dispatch_version INT NOT NULL COMMENT '任务派发版本',
+  topic VARCHAR(128) NOT NULL COMMENT '目标Topic',
+  tag VARCHAR(64) NOT NULL COMMENT '消息Tag',
+  message_key VARCHAR(64) NOT NULL COMMENT '消息Key',
+  payload_json JSON NOT NULL COMMENT '命令消息体',
+  status VARCHAR(24) NOT NULL DEFAULT 'PENDING' COMMENT 'PENDING/CLAIMED/SENT/QUARANTINED',
+  attempt_count INT NOT NULL DEFAULT 0 COMMENT '累计发送尝试次数',
+  next_retry_at DATETIME(3) NOT NULL COMMENT '允许发送的最早时间',
+  lease_owner VARCHAR(128) NULL COMMENT '领取实例标识',
+  lease_until DATETIME(3) NULL COMMENT '领取租约截止时间',
+  sent_at DATETIME(3) NULL COMMENT '发送成功时间',
+  last_error VARCHAR(1000) NULL COMMENT '最后发送错误',
+  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+  updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
+  PRIMARY KEY (id),
+  UNIQUE KEY uk_file_export_outbox_event (event_id),
+  UNIQUE KEY uk_file_export_outbox_task_version (task_id, dispatch_version),
+  KEY idx_file_export_outbox_publish (status, next_retry_at, id),
+  KEY idx_file_export_outbox_task (task_id, dispatch_version, status, sent_at)
+) ENGINE=InnoDB COMMENT='导出命令事务Outbox表';