Add dynamic log level change support

ballerina/Ballerina.toml

@@ -1,7 +1,7 @@
 [package]
 org = "ballerina"
 name = "log"
-version = "2.16.1"
+version = "2.17.0"
 authors = ["Ballerina"]
 keywords = ["level", "format"]
 repository = "https://github.com/ballerina-platform/module-ballerina-log"
@@ -15,18 +15,18 @@ graalvmCompatible = true
 [[platform.java21.dependency]]
 groupId = "io.ballerina.stdlib"
 artifactId = "log-native"
-version = "2.16.1"
-path = "../native/build/libs/log-native-2.16.1.jar"
+version = "2.17.0"
+path = "../native/build/libs/log-native-2.17.0-SNAPSHOT.jar"
 
 [[platform.java21.dependency]]
 groupId = "io.ballerina.stdlib"
 artifactId = "log-compiler-plugin"
-version = "2.16.1"
-path = "../compiler-plugin/build/libs/log-compiler-plugin-2.16.1.jar"
+version = "2.17.0"
+path = "../compiler-plugin/build/libs/log-compiler-plugin-2.17.0-SNAPSHOT.jar"
 
 [[platform.java21.dependency]]
 groupId = "io.ballerina.stdlib"
 artifactId = "log-test-utils"
-version = "2.16.1"
-path = "../test-utils/build/libs/log-test-utils-2.16.1.jar"
+version = "2.17.0"
+path = "../test-utils/build/libs/log-test-utils-2.17.0-SNAPSHOT.jar"
 scope = "testOnly"

ballerina/CompilerPlugin.toml

@@ -3,4 +3,4 @@ id = "log-compiler-plugin"
 class = "io.ballerina.stdlib.log.compiler.LogCompilerPlugin"
 
 [[dependency]]
-path = "../compiler-plugin/build/libs/log-compiler-plugin-2.16.1.jar"
+path = "../compiler-plugin/build/libs/log-compiler-plugin-2.17.0-SNAPSHOT.jar"

ballerina/Dependencies.toml

@@ -5,7 +5,7 @@
 
 [ballerina]
 dependencies-toml-version = "2"
-distribution-version = "2201.13.0"
+distribution-version = "2201.13.1"
 
 [[package]]
 org = "ballerina"
@@ -88,7 +88,7 @@ modules = [
 [[package]]
 org = "ballerina"
 name = "log"
-version = "2.16.1"
+version = "2.17.0"
 dependencies = [
 	{org = "ballerina", name = "io"},
 	{org = "ballerina", name = "jballerina.java"},

ballerina/init.bal

@@ -21,6 +21,25 @@ function init() returns error? {
     rootLogger = new RootLogger();
     check validateDestinations(destinations);
     setModule();
+
+    // Register the global root logger in the registry
+    lock {
+        loggerRegistry["root"] = rootLogger;
+    }
+
+    // Register each configured module as a Logger in the Ballerina-side registry.
+    // Module loggers use the module name as their ID. The initial level is also pushed
+    // to the Java-side ConcurrentHashMap so that RootLogger.print() can do a lock-free lookup.
+    foreach Module mod in modules {
+        ConfigInternal moduleConfig = {
+            level: mod.level
+        };
+        RootLogger moduleLogger = new RootLogger(moduleConfig, mod.name, true);
+        lock {
+            loggerRegistry[mod.name] = moduleLogger;
+        }
+        setModuleLevelNative(mod.name, mod.level);
+    }
 }
 
 isolated function validateDestinations(OutputDestination[] destinations) returns Error? {

ballerina/logger.bal

@@ -53,4 +53,20 @@ public type Logger isolated object {
    # + keyValues - The key-value pairs to be added to the logger context
    # + return - A new Logger instance with the given key-values added to its context
    public isolated function withContext(*KeyValues keyValues) returns Logger|error;
+
+   # Returns the effective log level of this logger.
+   # For root and custom loggers, returns the explicitly set level.
+   # For child loggers (created via `withContext`), returns the inherited level from the parent logger.
+   #
+   # + return - The effective log level
+   public isolated function getLevel() returns Level;
+
+   # Sets the log level of this logger at runtime.
+   # This is supported on root loggers, module loggers, and loggers created via `fromConfig`.
+   # Child loggers (created via `withContext`) do not support this operation and will return an error.
+   # To change a child logger's effective level, set the level on its parent logger instead.
+   #
+   # + level - The new log level to set
+   # + return - An error if the operation is not supported, nil on success
+   public isolated function setLevel(Level level) returns error?;
 };

ballerina/natives.bal

@@ -468,14 +468,17 @@ isolated function replaceString(handle receiver, handle target, handle replaceme
     paramTypes: ["java.lang.CharSequence", "java.lang.CharSequence"]
 } external;
 
-isolated function isLogLevelEnabled(string loggerLogLevel, string logLevel, string moduleName) returns boolean {
-    string moduleLogLevel = loggerLogLevel;
-    if modules.length() > 0 {
-        if modules.hasKey(moduleName) {
-            moduleLogLevel = modules.get(moduleName).level;
-        }
-    }
-    return logLevelWeight.get(logLevel) >= logLevelWeight.get(moduleLogLevel);
+final readonly & map<int> LOG_LEVEL_WEIGHT = {
+    "ERROR": 1000,
+    "WARN": 900,
+    "INFO": 800,
+    "DEBUG": 700
+};
+
+isolated function isLevelEnabled(string effectiveLevel, string logLevel) returns boolean {
+    int requestedWeight = LOG_LEVEL_WEIGHT[logLevel] ?: 0;
+    int effectiveWeight = LOG_LEVEL_WEIGHT[effectiveLevel] ?: 800;
+    return requestedWeight >= effectiveWeight;
 }
 
 isolated function getModuleName(KeyValues keyValues, int offset = 2) returns string {
@@ -492,3 +495,20 @@ isolated function getCurrentFileSize(string filePath) returns int = @java:Method
 isolated function getTimeSinceLastRotation(string filePath, string policy, int maxFileSize, int maxAgeInMillis, int maxBackupFiles) returns int = @java:Method {'class: "io.ballerina.stdlib.log.Utils"} external;
 
 isolated function rotateLog(string filePath, string policy, int maxFileSize, int maxAgeInMillis, int maxBackupFiles) returns error? = @java:Method {'class: "io.ballerina.stdlib.log.Utils"} external;
+
+// ========== Internal native function declarations for runtime log configuration ==========
+
+isolated function generateLoggerIdNative(int stackOffset) returns string = @java:Method {
+    'class: "io.ballerina.stdlib.log.LogConfigManager",
+    name: "generateLoggerId"
+} external;
+
+isolated function getModuleLevelNative(string moduleName) returns Level? = @java:Method {
+    'class: "io.ballerina.stdlib.log.LogConfigManager",
+    name: "getModuleLevel"
+} external;
+
+isolated function setModuleLevelNative(string moduleName, Level level) = @java:Method {
+    'class: "io.ballerina.stdlib.log.LogConfigManager",
+    name: "setModuleLevel"
+} external;