Use locale insensitive lower/upper case conversion (#2838)

instrumentation-api/src/main/java/io/opentelemetry/instrumentation/api/config/NamingConvention.java

@@ -5,19 +5,21 @@
 
 package io.opentelemetry.instrumentation.api.config;
 
+import java.util.Locale;
+
 // config property names are normalized to underscore separated lowercase words
 enum NamingConvention {
   DOT {
     @Override
     public String normalize(String key) {
       // many instrumentation names have dashes ('-')
-      return key.toLowerCase().replace('-', '.');
+      return key.toLowerCase(Locale.ROOT).replace('-', '.');
     }
   },
   ENV_VAR {
     @Override
     public String normalize(String key) {
-      return key.toLowerCase().replace('_', '.');
+      return key.toLowerCase(Locale.ROOT).replace('_', '.');
     }
   };
 

instrumentation-api/src/main/java/io/opentelemetry/instrumentation/api/db/RedisCommandSanitizer.java

@@ -15,6 +15,7 @@ import io.opentelemetry.instrumentation.api.db.RedisCommandSanitizer.CommandSani
 import java.nio.charset.StandardCharsets;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 
 /**
@@ -316,7 +317,9 @@ public final class RedisCommandSanitizer {
     if (!StatementSanitizationConfig.isStatementSanitizationEnabled()) {
       return KeepAllArgs.INSTANCE.sanitize(command, args);
     }
-    return SANITIZERS.getOrDefault(command.toUpperCase(), DEFAULT).sanitize(command, args);
+    return SANITIZERS
+        .getOrDefault(command.toUpperCase(Locale.ROOT), DEFAULT)
+        .sanitize(command, args);
   }
 
   public interface CommandSanitizer {

instrumentation-api/src/main/jflex/SqlSanitizer.flex

@@ -107,7 +107,7 @@ WHITESPACE        = [ \t\r\n]+
     }
 
     SqlStatementInfo getResult(String fullStatement) {
-      return SqlStatementInfo.create(fullStatement, getClass().getSimpleName().toUpperCase(), mainTable);
+      return SqlStatementInfo.create(fullStatement, getClass().getSimpleName().toUpperCase(java.util.Locale.ROOT), mainTable);
     }
   }
 

instrumentation/aws-lambda-1.0/library/src/main/java/io/opentelemetry/instrumentation/awslambda/v1_0/MapUtils.java

@@ -6,6 +6,7 @@
 package io.opentelemetry.instrumentation.awslambda.v1_0;
 
 import java.util.Collections;
+import java.util.Locale;
 import java.util.Map;
 import java.util.stream.Collectors;
 
@@ -13,7 +14,7 @@ final class MapUtils {
   static Map<String, String> lowercaseMap(Map<String, String> source) {
     return emptyIfNull(source).entrySet().stream()
         .filter(e -> e.getKey() != null)
-        .collect(Collectors.toMap(e -> e.getKey().toLowerCase(), Map.Entry::getValue));
+        .collect(Collectors.toMap(e -> e.getKey().toLowerCase(Locale.ROOT), Map.Entry::getValue));
   }
 
   static Map<String, String> emptyIfNull(Map<String, String> map) {

instrumentation/aws-lambda-1.0/library/src/main/java/io/opentelemetry/instrumentation/awslambda/v1_0/ParentContextExtractor.java

@@ -14,6 +14,7 @@ import io.opentelemetry.context.propagation.TextMapGetter;
 import io.opentelemetry.extension.aws.AwsXrayPropagator;
 import io.opentelemetry.instrumentation.api.tracer.BaseTracer;
 import java.util.Collections;
+import java.util.Locale;
 import java.util.Map;
 
 public class ParentContextExtractor {
@@ -69,7 +70,7 @@ public class ParentContextExtractor {
 
     @Override
     public String get(Map<String, String> map, String s) {
-      return map.get(s.toLowerCase());
+      return map.get(s.toLowerCase(Locale.ROOT));
     }
   }
 }

instrumentation/aws-sdk/aws-sdk-2.2/library/src/main/java/io/opentelemetry/instrumentation/awssdk/v2_2/MethodHandleFactory.java

@@ -7,12 +7,13 @@ package io.opentelemetry.instrumentation.awssdk.v2_2;
 
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
+import java.util.Locale;
 import java.util.concurrent.ConcurrentHashMap;
 
 class MethodHandleFactory {
 
   private String lowerCase(String string) {
-    return string.substring(0, 1).toLowerCase() + string.substring(1);
+    return string.substring(0, 1).toLowerCase(Locale.ROOT) + string.substring(1);
   }
 
   private final ClassValue<ConcurrentHashMap<String, MethodHandle>> getterCache =

instrumentation/jdbc/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/jdbc/JdbcConnectionUrlParser.java

@@ -15,6 +15,7 @@ import java.net.URLDecoder;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Properties;
 import java.util.regex.Matcher;
@@ -815,7 +816,7 @@ public enum JdbcConnectionUrlParser {
       return DEFAULT;
     }
     // Make this easier and ignore case.
-    connectionUrl = connectionUrl.toLowerCase();
+    connectionUrl = connectionUrl.toLowerCase(Locale.ROOT);
 
     if (!connectionUrl.startsWith("jdbc:")) {
       return DEFAULT;

javaagent-tooling/src/main/java/io/opentelemetry/javaagent/tooling/LoggingConfigurer.java

@@ -5,6 +5,8 @@
 
 package io.opentelemetry.javaagent.tooling;
 
+import java.util.Locale;
+
 class LoggingConfigurer {
 
   private static final String SIMPLE_LOGGER_SHOW_DATE_TIME_PROPERTY =
@@ -57,7 +59,7 @@ class LoggingConfigurer {
     }
 
     String tracerDebugLevelEnv =
-        System.getenv(tracerDebugLevelSysprop.replace('.', '_').toUpperCase());
+        System.getenv(tracerDebugLevelSysprop.replace('.', '_').toUpperCase(Locale.ROOT));
 
     if (tracerDebugLevelEnv != null) {
       return Boolean.parseBoolean(tracerDebugLevelEnv);