Initial naive pubsub impl generalising from current setup

modules/store/src/main/resources/db/migration/h2/V1.28.0__pubsub.sql

@@ -0,0 +1,8 @@
+CREATE TABLE "pubsub" (
+  "id" varchar(254) not null primary key,
+  "node_id" varchar(254) not null,
+  "url" varchar(254) not null,
+  "topic" varchar(254) not null,
+  "counter" int not null,
+  unique("url", "topic")
+)

modules/store/src/main/resources/db/migration/mariadb/V1.28.0__pubsub.sql

@@ -0,0 +1,8 @@
+CREATE TABLE `pubsub` (
+  `id` varchar(254) not null primary key,
+  `node_id` varchar(254) not null,
+  `url` varchar(254) not null,
+  `topic` varchar(254) not null,
+  `counter` int not null,
+  unique(`url`, `topic`)
+)

modules/store/src/main/resources/db/migration/postgresql/V1.28.0__pubsub.sql

@@ -0,0 +1,8 @@
+CREATE TABLE "pubsub" (
+  "id" varchar(254) not null primary key,
+  "node_id" varchar(254) not null,
+  "url" varchar(254) not null,
+  "topic" varchar(254) not null,
+  "counter" int not null,
+  unique("url", "topic")
+)

modules/store/src/main/scala/docspell/store/records/RPubSub.scala

@@ -0,0 +1,86 @@
+/*
+ * Copyright 2020 Eike K. & Contributors
+ *
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+package docspell.store.records
+
+import cats.data.NonEmptyList
+import cats.implicits._
+
+import docspell.common._
+import docspell.store.qb.DSL._
+import docspell.store.qb.{Column, DML, TableDef}
+
+import doobie._
+import doobie.implicits._
+
+/** A table for supporting naive pubsub across nodes. */
+final case class RPubSub(
+    id: Ident,
+    nodeId: Ident,
+    url: LenientUri,
+    topic: String,
+    counter: Int
+)
+
+object RPubSub {
+  final case class Table(alias: Option[String]) extends TableDef {
+    val tableName: String = "pubsub"
+
+    val id = Column[Ident]("id", this)
+    val nodeId = Column[Ident]("node_id", this)
+    val url = Column[LenientUri]("url", this)
+    val topic = Column[String]("topic", this)
+    val counter = Column[Int]("counter", this)
+
+    val all: NonEmptyList[Column[_]] =
+      NonEmptyList.of(id, nodeId, url, topic, counter)
+  }
+  def as(alias: String): Table =
+    Table(Some(alias))
+
+  val T: Table = Table(None)
+
+  def insert(r: RPubSub): ConnectionIO[Int] =
+    DML.insert(T, T.all, sql"${r.id}, ${r.nodeId}, ${r.url}, ${r.topic}, ${r.counter}")
+
+  /** Insert all topics with counter = 0 */
+  def initTopics(
+      nodeId: Ident,
+      url: LenientUri,
+      topics: NonEmptyList[String]
+  ): ConnectionIO[Int] =
+    DML.delete(T, T.nodeId === nodeId) *>
+      topics.toList
+        .traverse(t =>
+          Ident
+            .randomId[ConnectionIO]
+            .flatMap(id => insert(RPubSub(id, nodeId, url, t, 0)))
+        )
+        .map(_.sum)
+
+  def increment(url: LenientUri, topics: NonEmptyList[String]): ConnectionIO[Int] =
+    DML.update(
+      T,
+      T.url === url && T.topic.in(topics),
+      DML.set(
+        T.counter.increment(1)
+      )
+    )
+
+  def decrement(url: LenientUri, topics: NonEmptyList[String]): ConnectionIO[Int] =
+    DML.update(
+      T,
+      T.url === url && T.topic.in(topics),
+      DML.set(
+        T.counter.decrement(1)
+      )
+    )
+
+  def findSubs(topic: String): ConnectionIO[List[LenientUri]] =
+    run(select(T.url), from(T), T.topic === topic && T.counter > 0)
+      .query[LenientUri]
+      .to[List]
+}

modules/store/src/test/resources/logback-test.xml

@@ -3,7 +3,7 @@
         <withJansi>true</withJansi>
 
         <encoder>
-            <pattern>%highlight(%-5level) %cyan(%logger{15}) - %msg %n</pattern>
+            <pattern>%highlight(%-5level) [%t{10}] %cyan(%logger{15}) - %msg %n</pattern>
         </encoder>
     </appender>