(client) Use virtual threads in a few more clients

code/common/service/java/nu/marginalia/service/client/GrpcChannelPoolFactory.java

@@ -27,8 +27,9 @@ public class GrpcChannelPoolFactory {
     private static final Executor executor = useLoom
             ? Executors.newVirtualThreadPerTaskExecutor()
             : NamedExecutorFactory.createFixed("gRPC-Channel-Pool", Math.clamp(Runtime.getRuntime().availableProcessors() / 2, 2, 32));
-    private static final Executor offloadExecutor = NamedExecutorFactory.createFixed("gRPC-Offload-Pool",
-            Math.clamp(Runtime.getRuntime().availableProcessors() / 2, 2, 32));
+    private static final Executor offloadExecutor =  useLoom
+            ? Executors.newVirtualThreadPerTaskExecutor()
+            : NamedExecutorFactory.createFixed("gRPC-Offload-Pool", Math.clamp(Runtime.getRuntime().availableProcessors() / 2, 2, 32));
 
     @Inject
     public GrpcChannelPoolFactory(NodeConfigurationWatcher nodeConfigurationWatcher,

code/functions/domain-info/api/java/nu/marginalia/api/domains/DomainInfoClient.java

@@ -2,6 +2,8 @@ package nu.marginalia.api.domains;
 
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
+import nu.marginalia.api.domains.model.DomainInformation;
+import nu.marginalia.api.domains.model.SimilarDomain;
 import nu.marginalia.service.client.GrpcChannelPoolFactory;
 import nu.marginalia.service.client.GrpcSingleNodeChannelPool;
 import nu.marginalia.service.discovery.property.ServiceKey;
@@ -10,16 +12,19 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.util.List;
-import java.util.concurrent.*;
-
-import nu.marginalia.api.domains.model.*;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
 
 @Singleton
 public class DomainInfoClient {
     private static final Logger logger = LoggerFactory.getLogger(DomainInfoClient.class);
 
     private final GrpcSingleNodeChannelPool<DomainInfoAPIGrpc.DomainInfoAPIBlockingStub> channelPool;
-    private final ExecutorService executor = Executors.newWorkStealingPool(8);
+
+
+    private static final boolean useLoom = Boolean.getBoolean("system.experimentalUseLoom");
+    private static final ExecutorService executor = useLoom ? Executors.newVirtualThreadPerTaskExecutor() : Executors.newWorkStealingPool(8);
 
     @Inject
     public DomainInfoClient(GrpcChannelPoolFactory factory) {

code/functions/live-capture/api/java/nu/marginalia/api/feeds/FeedsClient.java

@@ -24,7 +24,9 @@ import java.util.function.BiConsumer;
 
 @Singleton
 public class FeedsClient {
-    private final ExecutorService executorService = Executors.newCachedThreadPool();
+    private static final boolean useLoom = Boolean.getBoolean("system.experimentalUseLoom");
+    private static final ExecutorService executorService = useLoom ? Executors.newVirtualThreadPerTaskExecutor() : Executors.newCachedThreadPool();
+
     private final GrpcSingleNodeChannelPool<FeedApiGrpc.FeedApiBlockingStub> channelPool;
     private final MqOutbox updateFeedsOutbox;
 

code/functions/math/api/java/nu/marginalia/api/math/MathClient.java

@@ -26,7 +26,9 @@ public class MathClient {
     private static final Logger logger = LoggerFactory.getLogger(MathClient.class);
 
     private final GrpcSingleNodeChannelPool<MathApiGrpc.MathApiBlockingStub> channelPool;
-    private final ExecutorService executor = Executors.newWorkStealingPool(8);
+
+    private static final boolean useLoom = Boolean.getBoolean("system.experimentalUseLoom");
+    private static final ExecutorService executor = useLoom ? Executors.newVirtualThreadPerTaskExecutor() : Executors.newWorkStealingPool(8);
 
     @Inject
     public MathClient(GrpcChannelPoolFactory factory) {

code/index/api/java/nu/marginalia/index/api/IndexClient.java

@@ -38,7 +38,9 @@ public class IndexClient {
             .help("Count of results filtered by NSFW tier")
             .register();
 
-    private static final ExecutorService executor = Executors.newCachedThreadPool();
+
+    private static final boolean useLoom = Boolean.getBoolean("system.experimentalUseLoom");
+    private static final ExecutorService executor = useLoom ? Executors.newVirtualThreadPerTaskExecutor() : Executors.newCachedThreadPool();
 
     @Inject
     public IndexClient(GrpcChannelPoolFactory channelPoolFactory,

code/processes/ping-process/java/nu/marginalia/ping/BackoffStrategy.java

@@ -63,12 +63,12 @@ public class BackoffStrategy {
         double backoffMinutes = baseInterval.toMinutes()
                 * Math.pow(multiplier, Math.clamp(backoffConsecutiveFailures, 1, 10));
 
-        Duration newDuration = Duration.ofMinutes(Math.round(0.5+backoffMinutes));
-        if (newDuration.compareTo(maxInterval) > 0) {
+        var backoffVal = Math.round(0.5+backoffMinutes);
+        if (backoffVal > maxInterval.toMinutes()) {
             return maxInterval;
         }
 
-        return newDuration;
+        return Duration.ofMinutes(backoffVal);
     }
 
     private Duration addJitter(Duration duration) {