(dom-sample) Use WAL journal for dom sample db

code/functions/live-capture/java/nu/marginalia/domsample/DomSampleService.java

@@ -35,15 +35,22 @@ public class DomSampleService {
 
         if (StringUtils.isEmpty(browserlessAddress) || serviceConfiguration.node() > 1) {
             logger.warn("Live capture service will not run");
-            browserlessURI = null; // satisfy final
+            browserlessURI = null;
         }
         else {
             browserlessURI = new URI(browserlessAddress);
-
-            Thread.ofPlatform().daemon().start(this::run);
         }
     }
 
+    public void start() {
+        if (browserlessURI == null) {
+            logger.warn("DomSampleService is not enabled due to missing browserless URI or multi-node configuration");
+            return;
+        }
+
+        Thread.ofPlatform().daemon().start(this::run);
+    }
+
     public void syncDomains() {
         Set<String> dbDomains = new HashSet<>();
 

code/functions/live-capture/java/nu/marginalia/domsample/db/DomSampleDb.java

@@ -26,7 +26,9 @@ public class DomSampleDb implements AutoCloseable {
             stmt.executeUpdate("CREATE TABLE IF NOT EXISTS samples (url TEXT PRIMARY KEY, domain TEXT, sample BLOB, requests BLOB, accepted_popover BOOLEAN DEFAULT FALSE)");
             stmt.executeUpdate("CREATE INDEX IF NOT EXISTS domain_index ON samples (domain)");
             stmt.executeUpdate("CREATE TABLE IF NOT EXISTS schedule (domain TEXT PRIMARY KEY, last_fetch TIMESTAMP DEFAULT NULL)");
+            stmt.execute("PRAGMA journal_mode=WAL");
         }
+
     }
 
     public void syncDomains(Set<String> domains) {

code/services-core/assistant-service/java/nu/marginalia/assistant/AssistantService.java

@@ -5,6 +5,7 @@ import com.google.inject.Inject;
 import io.jooby.Context;
 import io.jooby.Jooby;
 import nu.marginalia.assistant.suggest.Suggestions;
+import nu.marginalia.domsample.DomSampleService;
 import nu.marginalia.functions.domains.DomainInfoGrpcService;
 import nu.marginalia.functions.math.MathGrpcService;
 import nu.marginalia.livecapture.LiveCaptureGrpcService;
@@ -30,6 +31,7 @@ public class AssistantService extends JoobyService {
                             ScreenshotService screenshotService,
                             DomainInfoGrpcService domainInfoGrpcService,
                             LiveCaptureGrpcService liveCaptureGrpcService,
+                            DomSampleService domSampleService,
                             FeedsGrpcService feedsGrpcService,
                             MathGrpcService mathGrpcService,
                             Suggestions suggestions)
@@ -41,10 +43,11 @@ public class AssistantService extends JoobyService {
                         liveCaptureGrpcService,
                         feedsGrpcService),
                 List.of());
-        this.screenshotService = screenshotService;
 
+        this.screenshotService = screenshotService;
         this.suggestions = suggestions;
 
+        domSampleService.start();
     }
 
     public void startJooby(Jooby jooby) {