javer的表结构设计

摘要：序设计了几张表，这里简单介绍下主要用来存储对象的每次变更操作以及变更的属性值。存储了每次变更的存储了每次变更的时间变更人支持自动从获取也可以自定义，比如用来存储额外的信息，比如存储了用户，顺带存一下用户名等。

javers设计了几张表，这里简单介绍下

主要用来存储对象的每次变更操作以及变更的属性值。

-- ----------------------------
--  Table structure for jv_snapshot
-- ----------------------------
DROP TABLE IF EXISTS "public"."jv_snapshot";
CREATE TABLE "public"."jv_snapshot" (
    "snapshot_pk" int8 NOT NULL,
    "type" varchar(200) COLLATE "default",
    "version" int8,
    "state" text COLLATE "default",
    "changed_properties" text COLLATE "default",
    "managed_type" varchar(200) COLLATE "default",
    "global_id_fk" int8,
    "commit_fk" int8
)
WITH (OIDS=FALSE);
ALTER TABLE "public"."jv_snapshot" OWNER TO "postgres";

-- ----------------------------
--  Primary key structure for table jv_snapshot
-- ----------------------------
ALTER TABLE "public"."jv_snapshot" ADD PRIMARY KEY ("snapshot_pk") NOT DEFERRABLE INITIALLY IMMEDIATE;

-- ----------------------------
--  Indexes structure for table jv_snapshot
-- ----------------------------
CREATE INDEX  "jv_snapshot_commit_fk_idx" ON "public"."jv_snapshot" USING btree(commit_fk "pg_catalog"."int8_ops" ASC NULLS LAST);
CREATE INDEX  "jv_snapshot_global_id_fk_idx" ON "public"."jv_snapshot" USING btree(global_id_fk "pg_catalog"."int8_ops" ASC NULLS LAST);

-- ----------------------------
--  Foreign keys structure for table jv_snapshot
-- ----------------------------
ALTER TABLE "public"."jv_snapshot" ADD CONSTRAINT "jv_snapshot_commit_fk" FOREIGN KEY ("commit_fk") REFERENCES "public"."jv_commit" ("commit_pk") ON UPDATE NO ACTION ON DELETE NO ACTION NOT DEFERRABLE INITIALLY IMMEDIATE;
ALTER TABLE "public"."jv_snapshot" ADD CONSTRAINT "jv_snapshot_global_id_fk" FOREIGN KEY ("global_id_fk") REFERENCES "public"."jv_global_id" ("global_id_pk") ON UPDATE NO ACTION ON DELETE NO ACTION NOT DEFERRABLE INITIALLY IMMEDIATE;

存储了每次变更的id

-- ----------------------------
--  Table structure for jv_global_id
-- ----------------------------
DROP TABLE IF EXISTS "public"."jv_global_id";
CREATE TABLE "public"."jv_global_id" (
    "global_id_pk" int8 NOT NULL,
    "local_id" varchar(200) COLLATE "default",
    "fragment" varchar(200) COLLATE "default",
    "type_name" varchar(200) COLLATE "default",
    "owner_id_fk" int8
)
WITH (OIDS=FALSE);
ALTER TABLE "public"."jv_global_id" OWNER TO "postgres";

-- ----------------------------
--  Primary key structure for table jv_global_id
-- ----------------------------
ALTER TABLE "public"."jv_global_id" ADD PRIMARY KEY ("global_id_pk") NOT DEFERRABLE INITIALLY IMMEDIATE;

-- ----------------------------
--  Indexes structure for table jv_global_id
-- ----------------------------
CREATE INDEX  "jv_global_id_local_id_idx" ON "public"."jv_global_id" USING btree(local_id COLLATE "default" "pg_catalog"."text_ops" ASC NULLS LAST);

-- ----------------------------
--  Foreign keys structure for table jv_global_id
-- ----------------------------
ALTER TABLE "public"."jv_global_id" ADD CONSTRAINT "jv_global_id_owner_id_fk" FOREIGN KEY ("owner_id_fk") REFERENCES "public"."jv_global_id" ("global_id_pk") ON UPDATE NO ACTION ON DELETE NO ACTION NOT DEFERRABLE INITIALLY IMMEDIATE;

存储了每次变更的时间、变更人

-- ----------------------------
--  Table structure for jv_commit
-- ----------------------------
DROP TABLE IF EXISTS "public"."jv_commit";
CREATE TABLE "public"."jv_commit" (
    "commit_pk" int8 NOT NULL,
    "author" varchar(200) COLLATE "default",
    "commit_date" timestamp(6) NULL,
    "commit_id" numeric(22,2)
)
WITH (OIDS=FALSE);
ALTER TABLE "public"."jv_commit" OWNER TO "postgres";

-- ----------------------------
--  Primary key structure for table jv_commit
-- ----------------------------
ALTER TABLE "public"."jv_commit" ADD PRIMARY KEY ("commit_pk") NOT DEFERRABLE INITIALLY IMMEDIATE;

-- ----------------------------
--  Indexes structure for table jv_commit
-- ----------------------------
CREATE INDEX  "jv_commit_commit_id_idx" ON "public"."jv_commit" USING btree(commit_id "pg_catalog"."numeric_ops" ASC NULLS LAST);

支持自动从SpringSecurity获取auditor

public class SpringSecurityAuthorProvider implements AuthorProvider {
    public SpringSecurityAuthorProvider() {
    }

    public String provide() {
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        return auth == null?"unauthenticated":auth.getName();
    }
}

也可以自定义，比如

@Bean
    public AuthorProvider authorProvider() {
        return new MockAuthorProvider();
    }

用来存储额外的信息，比如存储了用户id，顺带存一下用户名等。

-- ----------------------------
--  Table structure for jv_commit_property
-- ----------------------------
DROP TABLE IF EXISTS "public"."jv_commit_property";
CREATE TABLE "public"."jv_commit_property" (
    "property_name" varchar(200) NOT NULL COLLATE "default",
    "property_value" varchar(600) COLLATE "default",
    "commit_fk" int8 NOT NULL
)
WITH (OIDS=FALSE);
ALTER TABLE "public"."jv_commit_property" OWNER TO "postgres";

-- ----------------------------
--  Primary key structure for table jv_commit_property
-- ----------------------------
ALTER TABLE "public"."jv_commit_property" ADD PRIMARY KEY ("commit_fk", "property_name") NOT DEFERRABLE INITIALLY IMMEDIATE;

-- ----------------------------
--  Indexes structure for table jv_commit_property
-- ----------------------------
CREATE INDEX  "jv_commit_property_commit_fk_idx" ON "public"."jv_commit_property" USING btree(commit_fk "pg_catalog"."int8_ops" ASC NULLS LAST);
CREATE INDEX  "jv_commit_property_property_name_property_value_idx" ON "public"."jv_commit_property" USING btree(property_name COLLATE "default" "pg_catalog"."text_ops" ASC NULLS LAST, property_value COLLATE "default" "pg_catalog"."text_ops" ASC NULLS LAST);

-- ----------------------------
--  Foreign keys structure for table jv_commit_property
-- ----------------------------
ALTER TABLE "public"."jv_commit_property" ADD CONSTRAINT "jv_commit_property_commit_fk" FOREIGN KEY ("commit_fk") REFERENCES "public"."jv_commit" ("commit_pk") ON UPDATE NO ACTION ON DELETE NO ACTION NOT DEFERRABLE INITIALLY IMMEDIATE;

可以这样自定义

@Bean
    public CommitPropertiesProvider commitPropertiesProvider() {
        return new CommitPropertiesProvider() {
            @Override
            public Map provide() {
                return ImmutableMap.of("key", "ok");
            }
        };
    }

javers