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feat(events): cursor-paginate agent events (ClickHouse impl)

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Orders by (timestamp DESC, instance_id ASC). Cursor is
base64url('timestampIso|instanceId') with a tuple keyset predicate
for stable paging across ties.
This commit is contained in:
hsiegeln
2026-04-17 11:57:35 +02:00
parent 67a834153e
commit d293dafb99
2 changed files with 139 additions and 20 deletions
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74
cameleer-server-app/src/test/java/com/cameleer/server/app/storage/ClickHouseAgentEventRepositoryIT.java
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@@ -153,4 +153,78 @@ class ClickHouseAgentEventRepositoryIT {
assertThat(results.get(1).eventType()).isEqualTo("SECOND");
assertThat(results.get(2).eventType()).isEqualTo("FIRST");
}
@Test
void queryPage_emptyTable_returnsEmptyPage() {
com.cameleer.server.core.agent.AgentEventPage page =
repo.queryPage(null, null, null, null, null, null, 10);
assertThat(page.data()).isEmpty();
assertThat(page.hasMore()).isFalse();
assertThat(page.nextCursor()).isNull();
}
@Test
void queryPage_boundary_noHasMoreWhenLimitEqualsRowCount() {
Instant base = Instant.parse("2026-04-01T10:00:00Z");
for (int i = 0; i < 3; i++) {
insertAt("agent-1", "app-a", "TICK", "t" + i, base.plusSeconds(i));
}
com.cameleer.server.core.agent.AgentEventPage page =
repo.queryPage(null, null, null, null, null, null, 3);
assertThat(page.data()).hasSize(3);
assertThat(page.hasMore()).isFalse();
assertThat(page.nextCursor()).isNull();
}
@Test
void queryPage_paginatesAcrossThreePages() {
Instant base = Instant.parse("2026-04-01T10:00:00Z");
for (int i = 0; i < 5; i++) {
insertAt("agent-1", "app-a", "TICK", "t" + i, base.plusSeconds(i));
}
com.cameleer.server.core.agent.AgentEventPage p1 =
repo.queryPage(null, null, null, null, null, null, 2);
assertThat(p1.data()).hasSize(2);
assertThat(p1.hasMore()).isTrue();
assertThat(p1.nextCursor()).isNotBlank();
assertThat(p1.data().get(0).detail()).isEqualTo("t4");
assertThat(p1.data().get(1).detail()).isEqualTo("t3");
com.cameleer.server.core.agent.AgentEventPage p2 =
repo.queryPage(null, null, null, null, null, p1.nextCursor(), 2);
assertThat(p2.data()).hasSize(2);
assertThat(p2.hasMore()).isTrue();
assertThat(p2.data().get(0).detail()).isEqualTo("t2");
assertThat(p2.data().get(1).detail()).isEqualTo("t1");
com.cameleer.server.core.agent.AgentEventPage p3 =
repo.queryPage(null, null, null, null, null, p2.nextCursor(), 2);
assertThat(p3.data()).hasSize(1);
assertThat(p3.hasMore()).isFalse();
assertThat(p3.nextCursor()).isNull();
assertThat(p3.data().get(0).detail()).isEqualTo("t0");
}
@Test
void queryPage_tiebreakByInstanceIdAsc_whenTimestampsEqual() {
Instant ts = Instant.parse("2026-04-01T10:00:00Z");
insertAt("agent-z", "app-a", "TICK", "z", ts);
insertAt("agent-a", "app-a", "TICK", "a", ts);
insertAt("agent-m", "app-a", "TICK", "m", ts);
com.cameleer.server.core.agent.AgentEventPage p1 =
repo.queryPage(null, null, null, null, null, null, 2);
assertThat(p1.data()).hasSize(2);
// (timestamp DESC, instance_id ASC): ties resolve to a, m, z
assertThat(p1.data().get(0).instanceId()).isEqualTo("agent-a");
assertThat(p1.data().get(1).instanceId()).isEqualTo("agent-m");
assertThat(p1.hasMore()).isTrue();
com.cameleer.server.core.agent.AgentEventPage p2 =
repo.queryPage(null, null, null, null, null, p1.nextCursor(), 2);
assertThat(p2.data()).hasSize(1);
assertThat(p2.data().get(0).instanceId()).isEqualTo("agent-z");
assertThat(p2.hasMore()).isFalse();
}
}