Null checking applied

api/all/src/main/java/io/opentelemetry/api/GlobalOpenTelemetry.java

@@ -169,6 +169,7 @@ public static OpenTelemetry get() {
    * OpenTelemetrySdk.builder().buildAndRegisterGlobal()} instead of calling this method directly.
    */
   public static void set(OpenTelemetry openTelemetry) {
+    Objects.requireNonNull(openTelemetry, "openTelemetry");
     synchronized (mutex) {
       if (globalOpenTelemetry != null) {
         throw new IllegalStateException(
@@ -192,6 +193,7 @@ public static void set(OpenTelemetry openTelemetry) {
    * @since 1.52.0
    */
   public static void set(Supplier<OpenTelemetry> supplier) {
+    Objects.requireNonNull(supplier, "supplier");
     synchronized (mutex) {
       OpenTelemetry openTelemetry = supplier.get();
       set(openTelemetry);
@@ -386,6 +388,7 @@ public ContextPropagators getPropagators() {
 
     @Override
     public TracerBuilder tracerBuilder(String instrumentationScopeName) {
+      Objects.requireNonNull(instrumentationScopeName, "instrumentationScopeName");
       return delegate.tracerBuilder(instrumentationScopeName);
     }
   }

api/all/src/main/java/io/opentelemetry/api/baggage/ImmutableEntryMetadata.java

@@ -6,7 +6,7 @@
 package io.opentelemetry.api.baggage;
 
 import com.google.auto.value.AutoValue;
-import io.opentelemetry.api.internal.ApiUsageLogger;
+import io.opentelemetry.common.ApiUsageLogger;
 import javax.annotation.concurrent.Immutable;
 
 @Immutable
@@ -25,7 +25,7 @@ abstract class ImmutableEntryMetadata implements BaggageEntryMetadata {
    */
   static ImmutableEntryMetadata create(String metadata) {
     if (metadata == null) {
-      ApiUsageLogger.log("metadata is null");
+      ApiUsageLogger.logNullParam(BaggageEntryMetadata.class, "create", "metadata");
       return EMPTY;
     }
     return new AutoValue_ImmutableEntryMetadata(metadata);

api/all/src/main/java/io/opentelemetry/api/logs/DefaultLogger.java

@@ -7,6 +7,7 @@
 
 import io.opentelemetry.api.common.AttributeKey;
 import io.opentelemetry.api.common.Value;
+import io.opentelemetry.common.ApiUsageLogger;
 import io.opentelemetry.context.Context;
 import java.time.Instant;
 import java.util.concurrent.TimeUnit;
@@ -59,26 +60,46 @@ public LogRecordBuilder setObservedTimestamp(Instant instant) {
 
     @Override
     public LogRecordBuilder setContext(Context context) {
+      if (context == null) {
+        ApiUsageLogger.logNullParam(LogRecordBuilder.class, "setContext", "context");
+        return this;
+      }
       return this;
     }
 
     @Override
     public LogRecordBuilder setSeverity(Severity severity) {
+      if (severity == null) {
+        ApiUsageLogger.logNullParam(LogRecordBuilder.class, "setSeverity", "severity");
+        return this;
+      }
       return this;
     }
 
     @Override
     public LogRecordBuilder setSeverityText(String severityText) {
+      if (severityText == null) {
+        ApiUsageLogger.logNullParam(LogRecordBuilder.class, "setSeverityText", "severityText");
+        return this;
+      }
       return this;
     }
 
     @Override
     public LogRecordBuilder setBody(String body) {
+      if (body == null) {
+        ApiUsageLogger.logNullParam(LogRecordBuilder.class, "setBody", "body");
+        return this;
+      }
       return this;
     }
 
     @Override
     public LogRecordBuilder setBody(Value<?> body) {
+      if (body == null) {
+        ApiUsageLogger.logNullParam(LogRecordBuilder.class, "setBody", "body");
+        return this;
+      }
       return this;
     }
 

api/all/src/main/java/io/opentelemetry/api/logs/DefaultLoggerProvider.java

@@ -5,6 +5,8 @@
 
 package io.opentelemetry.api.logs;
 
+import java.util.Objects;
+
 class DefaultLoggerProvider implements LoggerProvider {
 
   private static final LoggerProvider INSTANCE = new DefaultLoggerProvider();
@@ -18,18 +20,21 @@ static LoggerProvider getInstance() {
 
   @Override
   public LoggerBuilder loggerBuilder(String instrumentationScopeName) {
+    Objects.requireNonNull(instrumentationScopeName, "instrumentationScopeName");
     return NOOP_BUILDER;
   }
 
   private static class NoopLoggerBuilder implements LoggerBuilder {
 
     @Override
     public LoggerBuilder setSchemaUrl(String schemaUrl) {
+      Objects.requireNonNull(schemaUrl, "schemaUrl");
       return this;
     }
 
     @Override
     public LoggerBuilder setInstrumentationVersion(String instrumentationVersion) {
+      Objects.requireNonNull(instrumentationVersion, "instrumentationVersion");
       return this;
     }