Support JSON formatter for syslog logging

Fixes quarkusio#25950

core/deployment/src/main/java/io/quarkus/deployment/builditem/LogSyslogFormatBuildItem.java

@@ -0,0 +1,36 @@
+package io.quarkus.deployment.builditem;
+
+import java.util.Optional;
+import java.util.logging.Formatter;
+
+import org.wildfly.common.Assert;
+
+import io.quarkus.builder.item.MultiBuildItem;
+import io.quarkus.runtime.RuntimeValue;
+
+/**
+ * The syslog format build item. Producing this item will cause the logging subsystem to disregard its
+ * syslog logging formatting configuration and use the formatter provided instead. If multiple formatters
+ * are enabled at runtime, a warning message is printed and only one is used.
+ */
+public final class LogSyslogFormatBuildItem extends MultiBuildItem {
+    private final RuntimeValue<Optional<Formatter>> formatterValue;
+
+    /**
+     * Construct a new instance.
+     *
+     * @param formatterValue the optional formatter runtime value to use (must not be {@code null})
+     */
+    public LogSyslogFormatBuildItem(final RuntimeValue<Optional<Formatter>> formatterValue) {
+        this.formatterValue = Assert.checkNotNullParam("formatterValue", formatterValue);
+    }
+
+    /**
+     * Get the formatter value.
+     *
+     * @return the formatter value
+     */
+    public RuntimeValue<Optional<Formatter>> getFormatterValue() {
+        return formatterValue;
+    }
+}

core/deployment/src/main/java/io/quarkus/deployment/logging/LoggingResourceProcessor.java

@@ -65,6 +65,7 @@
 import io.quarkus.deployment.builditem.LogConsoleFormatBuildItem;
 import io.quarkus.deployment.builditem.LogFileFormatBuildItem;
 import io.quarkus.deployment.builditem.LogHandlerBuildItem;
+import io.quarkus.deployment.builditem.LogSyslogFormatBuildItem;
 import io.quarkus.deployment.builditem.NamedLogHandlersBuildItem;
 import io.quarkus.deployment.builditem.RunTimeConfigurationDefaultBuildItem;
 import io.quarkus.deployment.builditem.ShutdownListenerBuildItem;
@@ -231,6 +232,7 @@ LoggingSetupBuildItem setupLoggingRuntimeInit(RecorderContext context, LoggingSe
             List<NamedLogHandlersBuildItem> namedHandlerBuildItems,
             List<LogConsoleFormatBuildItem> consoleFormatItems,
             List<LogFileFormatBuildItem> fileFormatItems,
+            List<LogSyslogFormatBuildItem> syslogFormatItems,
             Optional<ConsoleFormatterBannerBuildItem> possibleBannerBuildItem,
             List<LogStreamBuildItem> logStreamBuildItems,
             BuildProducer<ShutdownListenerBuildItem> shutdownListenerBuildItemBuildProducer,
@@ -271,8 +273,13 @@ LoggingSetupBuildItem setupLoggingRuntimeInit(RecorderContext context, LoggingSe
                 alwaysEnableLogStream = true;
             }
 
+            List<RuntimeValue<Optional<Formatter>>> possibleConsoleFormatters = consoleFormatItems.stream()
+                    .map(LogConsoleFormatBuildItem::getFormatterValue).collect(Collectors.toList());
             List<RuntimeValue<Optional<Formatter>>> possibleFileFormatters = fileFormatItems.stream()
                     .map(LogFileFormatBuildItem::getFormatterValue).collect(Collectors.toList());
+            List<RuntimeValue<Optional<Formatter>>> possibleSyslogFormatters = syslogFormatItems.stream()
+                    .map(LogSyslogFormatBuildItem::getFormatterValue).collect(Collectors.toList());
+
             context.registerSubstitution(InheritableLevel.ActualLevel.class, String.class, InheritableLevel.Substitution.class);
             context.registerSubstitution(InheritableLevel.Inherited.class, String.class, InheritableLevel.Substitution.class);
 
@@ -289,9 +296,7 @@ LoggingSetupBuildItem setupLoggingRuntimeInit(RecorderContext context, LoggingSe
                     recorder.initializeLogging(log, buildLog, discoveredLogComponents,
                             categoryMinLevelDefaults.content, alwaysEnableLogStream,
                             wsDevUiLogHandler, streamingDevUiLogHandler, handlers, namedHandlers,
-                            consoleFormatItems.stream().map(LogConsoleFormatBuildItem::getFormatterValue)
-                                    .collect(Collectors.toList()),
-                            possibleFileFormatters,
+                            possibleConsoleFormatters, possibleFileFormatters, possibleSyslogFormatters,
                             possibleSupplier, launchModeBuildItem.getLaunchMode(), true)));
             LogConfig logConfig = new LogConfig();
             ConfigInstantiator.handleObject(logConfig);

core/runtime/src/main/java/io/quarkus/runtime/logging/LoggingSetupRecorder.java

@@ -82,6 +82,7 @@ public static void handleFailedStart(RuntimeValue<Optional<Supplier<String>>> ba
                 Collections.emptyList(),
                 Collections.emptyList(),
                 Collections.emptyList(),
+                Collections.emptyList(),
                 Collections.emptyList(), banner, LaunchMode.DEVELOPMENT, false);
     }
 
@@ -95,6 +96,7 @@ public ShutdownListener initializeLogging(LogConfig config, LogBuildTimeConfig b
             final List<RuntimeValue<Map<String, Handler>>> additionalNamedHandlers,
             final List<RuntimeValue<Optional<Formatter>>> possibleConsoleFormatters,
             final List<RuntimeValue<Optional<Formatter>>> possibleFileFormatters,
+            final List<RuntimeValue<Optional<Formatter>>> possibleSyslogFormatters,
             final RuntimeValue<Optional<Supplier<String>>> possibleBannerSupplier,
             LaunchMode launchMode,
             boolean validateFilters) {
@@ -173,7 +175,7 @@ public void close() throws SecurityException {
 
         if (config.syslog.enable) {
             final Handler syslogHandler = configureSyslogHandler(config.syslog, errorManager, cleanupFiler,
-                    namedFilters, validateFilters);
+                    namedFilters, possibleSyslogFormatters, validateFilters);
             if (syslogHandler != null) {
                 handlers.add(syslogHandler);
             }
@@ -213,7 +215,8 @@ public void close() throws SecurityException {
 
         Map<String, Handler> namedHandlers = shouldCreateNamedHandlers(config, additionalNamedHandlers)
                 ? createNamedHandlers(config, consoleRuntimeConfig.getValue(), additionalNamedHandlers,
-                        possibleConsoleFormatters, possibleFileFormatters, errorManager, cleanupFiler, namedFilters, launchMode,
+                        possibleConsoleFormatters, possibleFileFormatters, possibleSyslogFormatters,
+                        errorManager, cleanupFiler, namedFilters, launchMode,
                         shutdownNotifier, false)
                 : Collections.emptyMap();
         if (!categories.isEmpty()) {
@@ -323,7 +326,7 @@ public static void initializeBuildTimeLogging(LogConfig config, LogBuildTimeConf
         }
 
         Map<String, Handler> namedHandlers = createNamedHandlers(config, consoleConfig, Collections.emptyList(),
-                Collections.emptyList(), Collections.emptyList(), errorManager, logCleanupFilter,
+                Collections.emptyList(), Collections.emptyList(), Collections.emptyList(), errorManager, logCleanupFilter,
                 Collections.emptyMap(), launchMode, dummy, true);
 
         for (Map.Entry<String, CategoryConfig> entry : categories.entrySet()) {
@@ -409,6 +412,7 @@ private static Map<String, Handler> createNamedHandlers(LogConfig config, Consol
             List<RuntimeValue<Map<String, Handler>>> additionalNamedHandlers,
             List<RuntimeValue<Optional<Formatter>>> possibleConsoleFormatters,
             List<RuntimeValue<Optional<Formatter>>> possibleFileFormatters,
+            List<RuntimeValue<Optional<Formatter>>> possibleSyslogFormatters,
             ErrorManager errorManager, LogCleanupFilter cleanupFilter,
             Map<String, Filter> namedFilters, LaunchMode launchMode,
             ShutdownNotifier shutdownHandler, boolean validateFilters) {
@@ -438,7 +442,7 @@ private static Map<String, Handler> createNamedHandlers(LogConfig config, Consol
                 continue;
             }
             final Handler syslogHandler = configureSyslogHandler(namedSyslogConfig, errorManager, cleanupFilter,
-                    namedFilters, validateFilters);
+                    namedFilters, possibleSyslogFormatters, validateFilters);
             if (syslogHandler != null) {
                 addToNamedHandlers(namedHandlers, syslogHandler, sysLogConfigEntry.getKey());
             }
@@ -692,7 +696,9 @@ private static void applyFilter(boolean validateFilters, ErrorManager errorManag
 
     private static Handler configureSyslogHandler(final SyslogConfig config, final ErrorManager errorManager,
             final LogCleanupFilter logCleanupFilter,
-            final Map<String, Filter> namedFilters, final boolean validateFilters) {
+            final Map<String, Filter> namedFilters,
+            final List<RuntimeValue<Optional<Formatter>>> possibleSyslogFormatters,
+            final boolean validateFilters) {
         try {
             final SyslogHandler handler = new SyslogHandler(config.endpoint.getHostString(), config.endpoint.getPort());
             handler.setAppName(config.appName.orElse(getProcessName()));
@@ -704,11 +710,32 @@ private static Handler configureSyslogHandler(final SyslogConfig config, final E
             handler.setTruncate(config.truncate);
             handler.setUseCountingFraming(config.useCountingFraming);
             handler.setLevel(config.level);
-            final PatternFormatter formatter = new PatternFormatter(config.format);
+
+            Formatter formatter = null;
+            boolean formatterWarning = false;
+            for (RuntimeValue<Optional<Formatter>> value : possibleSyslogFormatters) {
+                if (formatter != null) {
+                    formatterWarning = true;
+                }
+                final Optional<Formatter> val = value.getValue();
+                if (val.isPresent()) {
+                    formatter = val.get();
+                }
+            }
+            if (formatter == null) {
+                formatter = new PatternFormatter(config.format);
+            }
             handler.setFormatter(formatter);
+
             handler.setErrorManager(errorManager);
             handler.setFilter(logCleanupFilter);
             applyFilter(validateFilters, errorManager, logCleanupFilter, config.filter, namedFilters, handler);
+
+            if (formatterWarning) {
+                handler.getErrorManager().error("Multiple syslog formatters were activated", null,
+                        ErrorManager.GENERIC_FAILURE);
+            }
+
             if (config.async.enable) {
                 return createAsyncHandler(config.async, config.level, handler);
             }

extensions/logging-json/deployment/src/main/java/io/quarkus/logging/json/deployment/LoggingJsonProcessor.java

@@ -5,6 +5,7 @@
 import io.quarkus.deployment.annotations.Record;
 import io.quarkus.deployment.builditem.LogConsoleFormatBuildItem;
 import io.quarkus.deployment.builditem.LogFileFormatBuildItem;
+import io.quarkus.deployment.builditem.LogSyslogFormatBuildItem;
 import io.quarkus.logging.json.runtime.JsonLogConfig;
 import io.quarkus.logging.json.runtime.LoggingJsonRecorder;
 
@@ -21,4 +22,10 @@ public LogConsoleFormatBuildItem setUpConsoleFormatter(LoggingJsonRecorder recor
     public LogFileFormatBuildItem setUpFileFormatter(LoggingJsonRecorder recorder, JsonLogConfig config) {
         return new LogFileFormatBuildItem(recorder.initializeFileJsonLogging(config));
     }
+
+    @BuildStep
+    @Record(ExecutionTime.RUNTIME_INIT)
+    public LogSyslogFormatBuildItem setUpSyslogFormatter(LoggingJsonRecorder recorder, JsonLogConfig config) {
+        return new LogSyslogFormatBuildItem(recorder.initializeSyslogJsonLogging(config));
+    }
 }

extensions/logging-json/deployment/src/test/java/io/quarkus/logging/json/SyslogJsonFormatterCustomConfigTest.java

@@ -0,0 +1,72 @@
+package io.quarkus.logging.json;
+
+import static io.quarkus.logging.json.SyslogJsonFormatterDefaultConfigTest.getJsonFormatter;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.time.ZoneId;
+import java.util.logging.Level;
+import java.util.logging.LogRecord;
+
+import org.assertj.core.api.Assertions;
+import org.jboss.logmanager.formatters.StructuredFormatter;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import io.quarkus.logging.json.runtime.AdditionalFieldConfig;
+import io.quarkus.logging.json.runtime.JsonFormatter;
+import io.quarkus.test.QuarkusUnitTest;
+
+public class SyslogJsonFormatterCustomConfigTest {
+
+    @RegisterExtension
+    static final QuarkusUnitTest config = new QuarkusUnitTest()
+            .withApplicationRoot((jar) -> jar.addClasses(SyslogJsonFormatterDefaultConfigTest.class))
+            .withConfigurationResource("application-syslog-json-formatter-custom.properties");
+
+    @Test
+    public void jsonFormatterCustomConfigurationTest() {
+        JsonFormatter jsonFormatter = getJsonFormatter();
+        assertThat(jsonFormatter.isPrettyPrint()).isTrue();
+        assertThat(jsonFormatter.getDateTimeFormatter().toString())
+                .isEqualTo("Value(DayOfMonth)' 'Text(MonthOfYear,SHORT)' 'Value(Year,4,19,EXCEEDS_PAD)");
+        assertThat(jsonFormatter.getDateTimeFormatter().getZone()).isEqualTo(ZoneId.of("UTC+05:00"));
+        assertThat(jsonFormatter.getExceptionOutputType())
+                .isEqualTo(StructuredFormatter.ExceptionOutputType.DETAILED_AND_FORMATTED);
+        assertThat(jsonFormatter.getRecordDelimiter()).isEqualTo("\n;");
+        assertThat(jsonFormatter.isPrintDetails()).isTrue();
+        assertThat(jsonFormatter.getExcludedKeys()).containsExactly("timestamp", "sequence");
+        assertThat(jsonFormatter.getAdditionalFields().size()).isEqualTo(2);
+        assertThat(jsonFormatter.getAdditionalFields().containsKey("foo")).isTrue();
+        assertThat(jsonFormatter.getAdditionalFields().get("foo").type).isEqualTo(AdditionalFieldConfig.Type.INT);
+        assertThat(jsonFormatter.getAdditionalFields().get("foo").value).isEqualTo("42");
+        assertThat(jsonFormatter.getAdditionalFields().containsKey("bar")).isTrue();
+        assertThat(jsonFormatter.getAdditionalFields().get("bar").type).isEqualTo(AdditionalFieldConfig.Type.STRING);
+        assertThat(jsonFormatter.getAdditionalFields().get("bar").value).isEqualTo("baz");
+    }
+
+    @Test
+    public void jsonFormatterOutputTest() throws Exception {
+        JsonFormatter jsonFormatter = getJsonFormatter();
+        String line = jsonFormatter.format(new LogRecord(Level.INFO, "Hello, World!"));
+
+        JsonNode node = new ObjectMapper().readTree(line);
+        // "level" has been renamed to HEY
+        Assertions.assertThat(node.has("level")).isFalse();
+        Assertions.assertThat(node.has("HEY")).isTrue();
+        Assertions.assertThat(node.get("HEY").asText()).isEqualTo("INFO");
+
+        // excluded fields
+        Assertions.assertThat(node.has("timestamp")).isFalse();
+        Assertions.assertThat(node.has("sequence")).isFalse();
+
+        // additional fields
+        Assertions.assertThat(node.has("foo")).isTrue();
+        Assertions.assertThat(node.get("foo").asInt()).isEqualTo(42);
+        Assertions.assertThat(node.has("bar")).isTrue();
+        Assertions.assertThat(node.get("bar").asText()).isEqualTo("baz");
+        Assertions.assertThat(node.get("message").asText()).isEqualTo("Hello, World!");
+    }
+}

extensions/logging-json/deployment/src/test/java/io/quarkus/logging/json/SyslogJsonFormatterDefaultConfigTest.java

@@ -0,0 +1,62 @@
+package io.quarkus.logging.json;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
+import java.util.Arrays;
+import java.util.logging.Formatter;
+import java.util.logging.Handler;
+import java.util.logging.Level;
+import java.util.logging.LogManager;
+import java.util.logging.Logger;
+
+import org.jboss.logmanager.formatters.StructuredFormatter;
+import org.jboss.logmanager.handlers.SyslogHandler;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.quarkus.bootstrap.logging.InitialConfigurator;
+import io.quarkus.bootstrap.logging.QuarkusDelayedHandler;
+import io.quarkus.logging.json.runtime.JsonFormatter;
+import io.quarkus.test.QuarkusUnitTest;
+
+public class SyslogJsonFormatterDefaultConfigTest {
+
+    @RegisterExtension
+    static final QuarkusUnitTest config = new QuarkusUnitTest()
+            .withConfigurationResource("application-syslog-json-formatter-default.properties");
+
+    @Test
+    public void jsonFormatterDefaultConfigurationTest() {
+        JsonFormatter jsonFormatter = getJsonFormatter();
+        assertThat(jsonFormatter.isPrettyPrint()).isFalse();
+        assertThat(jsonFormatter.getDateTimeFormatter().toString())
+                .isEqualTo(DateTimeFormatter.ISO_OFFSET_DATE_TIME.withZone(ZoneId.systemDefault()).toString());
+        assertThat(jsonFormatter.getDateTimeFormatter().getZone()).isEqualTo(ZoneId.systemDefault());
+        assertThat(jsonFormatter.getExceptionOutputType()).isEqualTo(StructuredFormatter.ExceptionOutputType.DETAILED);
+        assertThat(jsonFormatter.getRecordDelimiter()).isEqualTo("\n");
+        assertThat(jsonFormatter.isPrintDetails()).isFalse();
+        assertThat(jsonFormatter.getExcludedKeys()).isEmpty();
+        assertThat(jsonFormatter.getAdditionalFields().entrySet()).isEmpty();
+    }
+
+    public static JsonFormatter getJsonFormatter() {
+        LogManager logManager = LogManager.getLogManager();
+        assertThat(logManager).isInstanceOf(org.jboss.logmanager.LogManager.class);
+
+        QuarkusDelayedHandler delayedHandler = InitialConfigurator.DELAYED_HANDLER;
+        assertThat(Logger.getLogger("").getHandlers()).contains(delayedHandler);
+        assertThat(delayedHandler.getLevel()).isEqualTo(Level.ALL);
+
+        Handler handler = Arrays.stream(delayedHandler.getHandlers())
+                .filter(h -> (h instanceof SyslogHandler))
+                .findFirst().orElse(null);
+        assertThat(handler).isNotNull();
+        assertThat(handler.getLevel()).isEqualTo(Level.WARNING);
+
+        Formatter formatter = handler.getFormatter();
+        assertThat(formatter).isInstanceOf(JsonFormatter.class);
+        return (JsonFormatter) formatter;
+    }
+}

extensions/logging-json/deployment/src/test/resources/application-syslog-json-formatter-custom.properties

@@ -0,0 +1,16 @@
+quarkus.log.level=INFO
+quarkus.log.syslog.enable=true
+quarkus.log.syslog.level=WARNING
+quarkus.log.syslog.json=true
+quarkus.log.syslog.json.pretty-print=true
+quarkus.log.syslog.json.date-format=d MMM uuuu
+quarkus.log.syslog.json.record-delimiter=\n;
+quarkus.log.syslog.json.zone-id=UTC+05:00
+quarkus.log.syslog.json.exception-output-type=DETAILED_AND_FORMATTED
+quarkus.log.syslog.json.print-details=true
+quarkus.log.syslog.json.key-overrides=level=HEY
+quarkus.log.syslog.json.excluded-keys=timestamp,sequence
+quarkus.log.syslog.json.additional-field.foo.value=42
+quarkus.log.syslog.json.additional-field.foo.type=int
+quarkus.log.syslog.json.additional-field.bar.value=baz
+quarkus.log.syslog.json.additional-field.bar.type=string

extensions/logging-json/deployment/src/test/resources/application-syslog-json-formatter-default.properties

@@ -0,0 +1,5 @@
+quarkus.log.level=INFO
+quarkus.log.syslog.enable=true
+quarkus.log.syslog.level=WARNING
+quarkus.log.syslog.format=%d{yyyy-MM-dd HH:mm:ss,SSS} %-5p [%c{3.}] (%t) %s%e%n
+quarkus.log.syslog.json=true

extensions/logging-json/runtime/src/main/java/io/quarkus/logging/json/runtime/JsonLogConfig.java

@@ -33,6 +33,13 @@ public class JsonLogConfig {
     @ConfigItem(name = "file.json")
     JsonConfig fileJson;
 
+    /**
+     * Syslog logging.
+     */
+    @ConfigDocSection
+    @ConfigItem(name = "syslog.json")
+    JsonConfig syslogJson;
+
     @ConfigGroup
     public static class JsonConfig {
         /**

extensions/logging-json/runtime/src/main/java/io/quarkus/logging/json/runtime/LoggingJsonRecorder.java

@@ -18,6 +18,10 @@ public RuntimeValue<Optional<Formatter>> initializeFileJsonLogging(final JsonLog
         return getFormatter(config.fileJson);
     }
 
+    public RuntimeValue<Optional<Formatter>> initializeSyslogJsonLogging(JsonLogConfig config) {
+        return getFormatter(config.syslogJson);
+    }
+
     private RuntimeValue<Optional<Formatter>> getFormatter(JsonConfig config) {
         if (!config.enable) {
             return new RuntimeValue<>(Optional.empty());