SpineEventEngine · alexander-yevsyukov · Jun 25, 2025
diff --git a/backends/jul-backend/src/main/java/io/spine/logging/backend/jul/AbstractJulBackend.java b/backends/jul-backend/src/main/java/io/spine/logging/backend/jul/AbstractJulBackend.java
@@ -26,7 +26,7 @@
 
 package io.spine.logging.backend.jul;
 
-import io.spine.logging.flogger.backend.LoggerBackend;
+import io.spine.logging.jvm.backend.LoggerBackend;
 
 import java.util.logging.Filter;
 import java.util.logging.Handler;

diff --git a/backends/jul-backend/src/main/java/io/spine/logging/backend/jul/AbstractJulRecord.java b/backends/jul-backend/src/main/java/io/spine/logging/backend/jul/AbstractJulRecord.java
@@ -26,12 +26,12 @@
 
 package io.spine.logging.backend.jul;
 
-import io.spine.logging.flogger.backend.LogData;
-import io.spine.logging.flogger.backend.LogMessageFormatter;
-import io.spine.logging.flogger.backend.MessageUtils;
-import io.spine.logging.flogger.backend.Metadata;
-import io.spine.logging.flogger.backend.MetadataProcessor;
-import io.spine.logging.flogger.backend.SimpleMessageFormatter;
+import io.spine.logging.jvm.backend.LogData;
+import io.spine.logging.jvm.backend.LogMessageFormatter;
+import io.spine.logging.jvm.backend.MessageUtils;
+import io.spine.logging.jvm.backend.Metadata;
+import io.spine.logging.jvm.backend.MetadataProcessor;
+import io.spine.logging.jvm.backend.SimpleMessageFormatter;
 import com.google.errorprone.annotations.CanIgnoreReturnValue;
 
 import java.util.Arrays;

diff --git a/backends/jul-backend/src/main/java/io/spine/logging/backend/jul/JulRecord.java b/backends/jul-backend/src/main/java/io/spine/logging/backend/jul/JulRecord.java
@@ -26,9 +26,9 @@
 
 package io.spine.logging.backend.jul;
 
-import io.spine.logging.flogger.LogContext;
-import io.spine.logging.flogger.backend.LogData;
-import io.spine.logging.flogger.backend.Metadata;
+import io.spine.logging.jvm.LogContext;
+import io.spine.logging.jvm.backend.LogData;
+import io.spine.logging.jvm.backend.Metadata;
 
 import java.util.logging.LogRecord;
 

diff --git a/backends/jul-backend/src/main/kotlin/io/spine/logging/backend/jul/JulBackend.kt b/backends/jul-backend/src/main/kotlin/io/spine/logging/backend/jul/JulBackend.kt
@@ -26,9 +26,9 @@
 
 package io.spine.logging.backend.jul
 
-import io.spine.logging.flogger.backend.LogData
-import io.spine.logging.flogger.backend.LoggerBackend
-import io.spine.logging.flogger.backend.Platform
+import io.spine.logging.jvm.backend.LogData
+import io.spine.logging.jvm.backend.LoggerBackend
+import io.spine.logging.jvm.backend.Platform
 import java.util.logging.Handler
 import java.util.logging.Level
 import java.util.logging.LogRecord

diff --git a/backends/jul-backend/src/main/kotlin/io/spine/logging/backend/jul/JulBackendFactory.kt b/backends/jul-backend/src/main/kotlin/io/spine/logging/backend/jul/JulBackendFactory.kt
@@ -26,8 +26,8 @@
 
 package io.spine.logging.backend.jul
 
-import io.spine.logging.flogger.backend.BackendFactory
-import io.spine.logging.flogger.backend.LoggerBackend
+import io.spine.logging.jvm.backend.BackendFactory
+import io.spine.logging.jvm.backend.LoggerBackend
 
 /**
  * A [BackendFactory] producing [LoggerBackend] which supports publishing

diff --git a/backends/jul-backend/src/test/kotlin/io/spine/logging/backend/jul/JulRecordSpec.kt b/backends/jul-backend/src/test/kotlin/io/spine/logging/backend/jul/JulRecordSpec.kt
@@ -35,14 +35,14 @@ import io.kotest.matchers.string.shouldContain
 import io.kotest.matchers.string.shouldEndWith
 import io.kotest.matchers.string.shouldNotContain
 import io.kotest.matchers.types.shouldBeSameInstanceAs
-import io.spine.logging.flogger.FloggerMetadataKey
-import io.spine.logging.flogger.LogContext.Key
-import io.spine.logging.flogger.backend.Metadata
-import io.spine.logging.flogger.backend.given.FakeLogData
-import io.spine.logging.flogger.backend.given.FakeMetadata
-import io.spine.logging.flogger.context.Tags
-import io.spine.logging.flogger.parser.ParseException
-import io.spine.logging.flogger.singleKey
+import io.spine.logging.jvm.JvmMetadataKey
+import io.spine.logging.jvm.LogContext.Key
+import io.spine.logging.jvm.backend.Metadata
+import io.spine.logging.jvm.backend.given.FakeLogData
+import io.spine.logging.jvm.backend.given.FakeMetadata
+import io.spine.logging.jvm.context.Tags
+import io.spine.logging.jvm.parser.ParseException
+import io.spine.logging.jvm.singleKey
 import java.time.Instant.ofEpochMilli
 import java.util.concurrent.TimeUnit.NANOSECONDS
 import java.util.logging.Level
@@ -62,7 +62,7 @@ internal class JulRecordSpec {
         private val INT_KEY = singleKey<Int>("int")
         private val STR_KEY = singleKey<String>("str")
         private val PATH_KEY =
-            object : FloggerMetadataKey<String>("path", String::class.java, true) {
+            object : JvmMetadataKey<String>("path", String::class.java, true) {
                 override fun emitRepeated(values: Iterator<String>, out: KeyValueHandler) {
                     val joined = values.asSequence().joinToString("/")
                     out.handle(label, joined)

diff --git a/backends/jul-backend/src/test/kotlin/io/spine/logging/backend/jul/given/FakeJulRecord.kt b/backends/jul-backend/src/test/kotlin/io/spine/logging/backend/jul/given/FakeJulRecord.kt
@@ -27,12 +27,12 @@
 package io.spine.logging.backend.jul.given
 
 import io.spine.logging.backend.jul.AbstractJulRecord
-import io.spine.logging.flogger.backend.LogData
-import io.spine.logging.flogger.backend.LogMessageFormatter
-import io.spine.logging.flogger.backend.Metadata
-import io.spine.logging.flogger.backend.MetadataProcessor
-import io.spine.logging.flogger.backend.SimpleMessageFormatter
-import io.spine.logging.flogger.backend.given.FakeLogData
+import io.spine.logging.jvm.backend.LogData
+import io.spine.logging.jvm.backend.LogMessageFormatter
+import io.spine.logging.jvm.backend.Metadata
+import io.spine.logging.jvm.backend.MetadataProcessor
+import io.spine.logging.jvm.backend.SimpleMessageFormatter
+import io.spine.logging.jvm.backend.given.FakeLogData
 
 /**
  * An instantiatable [AbstractJulRecord].

diff --git a/backends/jul-backend/src/test/kotlin/io/spine/logging/backend/jul/given/JulBackendTestEnv.kt b/backends/jul-backend/src/test/kotlin/io/spine/logging/backend/jul/given/JulBackendTestEnv.kt
@@ -28,7 +28,7 @@ package io.spine.logging.backend.jul.given
 
 import io.spine.logging.backend.jul.AbstractJulBackend
 import io.spine.logging.backend.jul.given.MemoizingJulBackend.ForcingLogger
-import io.spine.logging.flogger.backend.LogData
+import io.spine.logging.jvm.backend.LogData
 import java.util.logging.Handler
 import java.util.logging.Level
 import java.util.logging.LogRecord

diff --git a/...ds/log4j2-backend/src/main/java/io/spine/logging/backend/log4j2/Log4j2BackendFactory.java b/...ds/log4j2-backend/src/main/java/io/spine/logging/backend/log4j2/Log4j2BackendFactory.java
@@ -26,8 +26,8 @@
 
 package io.spine.logging.backend.log4j2;
 
-import io.spine.logging.flogger.backend.LoggerBackend;
-import io.spine.logging.flogger.backend.BackendFactory;
+import io.spine.logging.jvm.backend.LoggerBackend;
+import io.spine.logging.jvm.backend.BackendFactory;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.core.Logger;
 

diff --git a/...ends/log4j2-backend/src/main/java/io/spine/logging/backend/log4j2/Log4j2LogEventUtil.java b/...ends/log4j2-backend/src/main/java/io/spine/logging/backend/log4j2/Log4j2LogEventUtil.java
@@ -26,23 +26,23 @@
 
 package io.spine.logging.backend.log4j2;
 
-import static io.spine.logging.flogger.backend.MetadataProcessor.forScopeAndLogSite;
+import static io.spine.logging.jvm.backend.MetadataProcessor.forScopeAndLogSite;
 import static java.util.concurrent.TimeUnit.NANOSECONDS;
 import static java.util.concurrent.TimeUnit.SECONDS;
 import static java.util.logging.Level.WARNING;
 
-import io.spine.logging.flogger.LogContext;
-import io.spine.logging.flogger.FloggerLogSite;
-import io.spine.logging.flogger.FloggerMetadataKey;
-import io.spine.logging.flogger.backend.BaseMessageFormatter;
-import io.spine.logging.flogger.backend.LogData;
-import io.spine.logging.flogger.backend.MessageUtils;
-import io.spine.logging.flogger.backend.Metadata;
-import io.spine.logging.flogger.backend.MetadataHandler;
-import io.spine.logging.flogger.backend.Platform;
-import io.spine.logging.flogger.backend.SimpleMessageFormatter;
-import io.spine.logging.flogger.context.ScopedLoggingContext;
-import io.spine.logging.flogger.context.Tags;
+import io.spine.logging.jvm.LogContext;
+import io.spine.logging.jvm.JvmLogSite;
+import io.spine.logging.jvm.JvmMetadataKey;
+import io.spine.logging.jvm.backend.BaseMessageFormatter;
+import io.spine.logging.jvm.backend.LogData;
+import io.spine.logging.jvm.backend.MessageUtils;
+import io.spine.logging.jvm.backend.Metadata;
+import io.spine.logging.jvm.backend.MetadataHandler;
+import io.spine.logging.jvm.backend.Platform;
+import io.spine.logging.jvm.backend.SimpleMessageFormatter;
+import io.spine.logging.jvm.context.ScopedLoggingContext;
+import io.spine.logging.jvm.context.Tags;
 import java.util.logging.Level;
 import java.util.stream.Collectors;
 import java.util.stream.StreamSupport;
@@ -111,7 +111,7 @@ private static LogEvent toLog4jLogEvent(
       org.apache.logging.log4j.Level level,
       Throwable thrown) {
 
-    FloggerLogSite logSite = logData.getLogSite();
+    JvmLogSite logSite = logData.getLogSite();
     StackTraceElement locationInfo =
         new StackTraceElement(
             logSite.getClassName(),
@@ -205,11 +205,11 @@ private static void appendLogData(LogData data, StringBuilder out) {
     out.append("\n  line number: ").append(data.getLogSite().getLineNumber());
   }
 
-  private static final MetadataHandler<FloggerMetadataKey.KeyValueHandler> HANDLER =
+  private static final MetadataHandler<JvmMetadataKey.KeyValueHandler> HANDLER =
       MetadataHandler.builder(Log4j2LogEventUtil::handleMetadata).build();
 
   private static void handleMetadata(
-          FloggerMetadataKey<Object> key, Object value, FloggerMetadataKey.KeyValueHandler kvh) {
+          JvmMetadataKey<Object> key, Object value, JvmMetadataKey.KeyValueHandler kvh) {
     if (key.getClass().equals(LogContext.Key.TAGS.getClass())) {
       processTags(key, value, kvh);
     } else {
@@ -225,7 +225,7 @@ private static void handleMetadata(
   }
 
   private static void processTags(
-          FloggerMetadataKey<Object> key, Object value, FloggerMetadataKey.KeyValueHandler kvh) {
+          JvmMetadataKey<Object> key, Object value, JvmMetadataKey.KeyValueHandler kvh) {
     ValueQueue valueQueue = ValueQueue.appendValueToNewQueue(value);
     // Unlike single metadata (which is usually formatted as a single value), tags are always
     // formatted as a list.

diff --git a/...nds/log4j2-backend/src/main/java/io/spine/logging/backend/log4j2/Log4j2LoggerBackend.java b/...nds/log4j2-backend/src/main/java/io/spine/logging/backend/log4j2/Log4j2LoggerBackend.java
@@ -26,8 +26,8 @@
 
 package io.spine.logging.backend.log4j2;
 
-import io.spine.logging.flogger.backend.LogData;
-import io.spine.logging.flogger.backend.LoggerBackend;
+import io.spine.logging.jvm.backend.LogData;
+import io.spine.logging.jvm.backend.LoggerBackend;
 import org.apache.logging.log4j.core.Logger;
 
 import static io.spine.logging.backend.log4j2.Log4j2LogEventUtil.toLog4jLevel;

diff --git a/backends/log4j2-backend/src/main/java/io/spine/logging/backend/log4j2/ValueQueue.java b/backends/log4j2-backend/src/main/java/io/spine/logging/backend/log4j2/ValueQueue.java
@@ -26,10 +26,10 @@
 
 package io.spine.logging.backend.log4j2;
 
-import static io.spine.logging.flogger.util.Checks.checkNotNull;
+import static io.spine.logging.jvm.util.Checks.checkNotNull;
 
-import io.spine.logging.flogger.FloggerMetadataKey.KeyValueHandler;
-import io.spine.logging.flogger.context.Tags;
+import io.spine.logging.jvm.JvmMetadataKey.KeyValueHandler;
+import io.spine.logging.jvm.context.Tags;
 import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.List;

diff --git a/...ne.logging.flogger.backend.BackendFactory → ....spine.logging.jvm.backend.BackendFactory b/...ne.logging.flogger.backend.BackendFactory → ....spine.logging.jvm.backend.BackendFactory
diff --git a/...og4j2-backend/src/test/kotlin/io/spine/logging/backend/log4j2/Log4j2BackendFactorySpec.kt b/...og4j2-backend/src/test/kotlin/io/spine/logging/backend/log4j2/Log4j2BackendFactorySpec.kt
@@ -26,7 +26,7 @@
 
 package io.spine.logging.backend.log4j2
 
-import io.spine.logging.flogger.backend.BackendFactory
+import io.spine.logging.jvm.backend.BackendFactory
 import io.kotest.matchers.collections.shouldHaveSize
 import io.kotest.matchers.nulls.shouldNotBeNull
 import io.kotest.matchers.types.shouldBeInstanceOf

diff --git a/...log4j2-backend/src/test/kotlin/io/spine/logging/backend/log4j2/Log4j2LoggerBackendSpec.kt b/...log4j2-backend/src/test/kotlin/io/spine/logging/backend/log4j2/Log4j2LoggerBackendSpec.kt
@@ -33,13 +33,13 @@ import io.kotest.matchers.shouldBe
 import io.kotest.matchers.string.shouldContain
 import io.kotest.matchers.types.shouldBeSameInstanceAs
 import io.spine.logging.backend.log4j2.given.MemoizingAppender
-import io.spine.logging.flogger.FloggerLogSite
-import io.spine.logging.flogger.LogContext.Key
-import io.spine.logging.flogger.backend.given.FakeLogData
-import io.spine.logging.flogger.given.FakeLogSite
-import io.spine.logging.flogger.parser.ParseException
-import io.spine.logging.flogger.repeatedKey
-import io.spine.logging.flogger.singleKey
+import io.spine.logging.jvm.JvmLogSite
+import io.spine.logging.jvm.LogContext.Key
+import io.spine.logging.jvm.backend.given.FakeLogData
+import io.spine.logging.jvm.given.FakeLogSite
+import io.spine.logging.jvm.parser.ParseException
+import io.spine.logging.jvm.repeatedKey
+import io.spine.logging.jvm.singleKey
 import java.util.concurrent.atomic.AtomicInteger
 import org.apache.logging.log4j.LogManager
 import org.apache.logging.log4j.core.Appender
@@ -175,7 +175,7 @@ internal class Log4j2LoggerBackendSpec {
             testLogSite(logSite)
         }
 
-        private fun testLogSite(logSite: FloggerLogSite) {
+        private fun testLogSite(logSite: JvmLogSite) {
             val data = FakeLogData("")
                 .setLogSite(logSite)
             backend.log(data)

diff --git a/...log4j2-backend/src/test/kotlin/io/spine/logging/backend/log4j2/Log4j2ScopedLoggingSpec.kt b/...log4j2-backend/src/test/kotlin/io/spine/logging/backend/log4j2/Log4j2ScopedLoggingSpec.kt
@@ -29,12 +29,12 @@ package io.spine.logging.backend.log4j2
 import io.kotest.matchers.collections.shouldHaveSize
 import io.kotest.matchers.shouldBe
 import io.spine.logging.backend.log4j2.given.MemoizingAppender
-import io.spine.logging.flogger.LogContext.Key
-import io.spine.logging.flogger.context.ContextDataProvider
-import io.spine.logging.flogger.context.Tags
-import io.spine.logging.flogger.given.ConfigurableLogger
-import io.spine.logging.flogger.repeatedKey
-import io.spine.logging.flogger.singleKey
+import io.spine.logging.jvm.LogContext.Key
+import io.spine.logging.jvm.context.ContextDataProvider
+import io.spine.logging.jvm.context.Tags
+import io.spine.logging.jvm.given.ConfigurableLogger
+import io.spine.logging.jvm.repeatedKey
+import io.spine.logging.jvm.singleKey
 import java.util.concurrent.atomic.AtomicInteger
 import org.apache.logging.log4j.Level
 import org.apache.logging.log4j.LogManager
@@ -48,7 +48,7 @@ import org.junit.jupiter.api.Nested
 import org.junit.jupiter.api.Test
 
 /**
- * Tests for interaction between [ScopedLoggingContext][io.spine.logging.flogger.context.ScopedLoggingContext]
+ * Tests for interaction between [ScopedLoggingContext][io.spine.logging.jvm.context.ScopedLoggingContext]
  * and [Log4j2LoggerBackend].
  *
  * `ScopedLoggingContext` is abstract. To test it with Log4j backend,

diff --git a/backends/probe-backend/src/main/kotlin/io/spine/logging/backend/probe/CaptureLogData.kt b/backends/probe-backend/src/main/kotlin/io/spine/logging/backend/probe/CaptureLogData.kt
@@ -26,7 +26,7 @@
 
 package io.spine.logging.backend.probe
 
-import io.spine.logging.flogger.backend.LogData
+import io.spine.logging.jvm.backend.LogData
 
 /**
  * Runs the given [action], capturing all log data that are passed

diff --git a/...nds/probe-backend/src/main/kotlin/io/spine/logging/backend/probe/DynamicBackendFactory.kt b/...nds/probe-backend/src/main/kotlin/io/spine/logging/backend/probe/DynamicBackendFactory.kt
@@ -26,8 +26,8 @@
 
 package io.spine.logging.backend.probe
 
-import io.spine.logging.flogger.backend.LoggerBackend
-import io.spine.logging.flogger.backend.BackendFactory
+import io.spine.logging.jvm.backend.LoggerBackend
+import io.spine.logging.jvm.backend.BackendFactory
 import io.spine.logging.backend.jul.JulBackendFactory
 
 /**

diff --git a/...be-backend/src/main/kotlin/io/spine/logging/backend/probe/DynamicBackendFactoryService.kt b/...be-backend/src/main/kotlin/io/spine/logging/backend/probe/DynamicBackendFactoryService.kt
@@ -27,8 +27,8 @@
 package io.spine.logging.backend.probe
 
 import com.google.auto.service.AutoService
-import io.spine.logging.flogger.backend.LoggerBackend
-import io.spine.logging.flogger.backend.BackendFactory
+import io.spine.logging.jvm.backend.LoggerBackend
+import io.spine.logging.jvm.backend.BackendFactory
 
 /**
  * Adapts [DynamicBackendFactory] to be used with Java's

diff --git a/...s/probe-backend/src/main/kotlin/io/spine/logging/backend/probe/MemoizingBackendFactory.kt b/...s/probe-backend/src/main/kotlin/io/spine/logging/backend/probe/MemoizingBackendFactory.kt
@@ -26,7 +26,7 @@
 
 package io.spine.logging.backend.probe
 
-import io.spine.logging.flogger.backend.LoggerBackend
+import io.spine.logging.jvm.backend.LoggerBackend
 
 /**
  * A backend factory that stores the created instances of [LoggerBackend].

diff --git a/...e-backend/src/main/kotlin/io/spine/logging/backend/probe/MemoizingLoggerBackendFactory.kt b/...e-backend/src/main/kotlin/io/spine/logging/backend/probe/MemoizingLoggerBackendFactory.kt
@@ -26,7 +26,7 @@
 
 package io.spine.logging.backend.probe
 
-import io.spine.logging.flogger.backend.given.MemoizingLoggerBackend
+import io.spine.logging.jvm.backend.given.MemoizingLoggerBackend
 
 /**
  * A factory of [MemoizingLoggerBackend].

diff --git a/backends/probe-backend/src/main/kotlin/io/spine/logging/backend/probe/TypedBackendFactory.kt b/backends/probe-backend/src/main/kotlin/io/spine/logging/backend/probe/TypedBackendFactory.kt
@@ -26,7 +26,7 @@
 
 package io.spine.logging.backend.probe
 
-import io.spine.logging.flogger.backend.LoggerBackend
+import io.spine.logging.jvm.backend.LoggerBackend
 
 /**
  * A typed [BackendFactory][io.spine.logging.backend.system.BackendFactory].

diff --git a/...kotlin/io/spine/dependency/lib/Flogger.kt → ...ain/kotlin/io/spine/dependency/lib/Jvm.kt b/...kotlin/io/spine/dependency/lib/Flogger.kt → ...ain/kotlin/io/spine/dependency/lib/Jvm.kt
@@ -29,7 +29,7 @@ package io.spine.dependency.lib
 // https://github.com/google/flogger
 @Deprecated("Please use Spine Logging library instead.")
 @Suppress("unused", "ConstPropertyName")
-object Flogger {
+object Jvm {
     internal const val version = "0.7.4"
     const val lib = "com.google.flogger:flogger:$version"
 

diff --git a/contexts/grpc-context/src/main/java/io/spine/logging/context/grpc/GrpcContextData.java b/contexts/grpc-context/src/main/java/io/spine/logging/context/grpc/GrpcContextData.java
@@ -26,12 +26,12 @@
 
 package io.spine.logging.context.grpc;
 
-import io.spine.logging.flogger.LoggingScope;
-import io.spine.logging.flogger.context.ContextMetadata;
-import io.spine.logging.flogger.context.LogLevelMap;
-import io.spine.logging.flogger.context.ScopeType;
-import io.spine.logging.flogger.context.ScopedLoggingContext.ScopeList;
-import io.spine.logging.flogger.context.Tags;
+import io.spine.logging.jvm.LoggingScope;
+import io.spine.logging.jvm.context.ContextMetadata;
+import io.spine.logging.jvm.context.LogLevelMap;
+import io.spine.logging.jvm.context.ScopeType;
+import io.spine.logging.jvm.context.ScopedLoggingContext.ScopeList;
+import io.spine.logging.jvm.context.Tags;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.logging.Level;
 import org.jspecify.annotations.Nullable;