Add option to configure the SSL context for the span exporter

src/main/java/dev/braintrust/config/BraintrustConfig.java

@@ -6,6 +6,8 @@
 import java.util.Optional;
 import java.util.function.Consumer;
 import javax.annotation.Nullable;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.X509TrustManager;
 
 /**
  * Configuration for Braintrust SDK. Uses builder pattern with sensible defaults and environment
@@ -23,6 +25,8 @@ public final class BraintrustConfig {
     private final boolean enableTraceConsoleLog;
     private final boolean debug;
     private final Duration requestTimeout;
+    private final SSLContext sslContext;
+    private final X509TrustManager x509TrustManager;
 
     private BraintrustConfig(Builder builder) {
         this.apiKey = builder.apiKey;
@@ -33,6 +37,8 @@ private BraintrustConfig(Builder builder) {
         this.enableTraceConsoleLog = builder.enableTraceConsoleLog;
         this.debug = builder.debug;
         this.requestTimeout = builder.requestTimeout;
+        this.sslContext = builder.sslContext;
+        this.x509TrustManager = builder.x509TrustManager;
     }
 
     public String apiKey() {
@@ -67,6 +73,14 @@ public Duration requestTimeout() {
         return requestTimeout;
     }
 
+    public SSLContext sslContext() {
+        return sslContext;
+    }
+
+    public X509TrustManager x509TrustManager() {
+        return x509TrustManager;
+    }
+
     /** Creates a new builder initialized with environment variables. */
     public static Builder builder() {
         return new Builder();
@@ -94,6 +108,8 @@ public static final class Builder {
         private String orgName;
         private boolean enableTraceConsoleLog;
         private boolean debug;
+        private SSLContext sslContext;
+        private X509TrustManager x509TrustManager;
         private Duration requestTimeout = Duration.ofSeconds(30);
 
         private Builder() {
@@ -155,6 +171,16 @@ public Builder requestTimeout(Duration timeout) {
             return this;
         }
 
+        public Builder sslContext(SSLContext sslContext) {
+            this.sslContext = sslContext;
+            return this;
+        }
+
+        public Builder x509TrustManager(X509TrustManager x509TrustManager) {
+            this.x509TrustManager = x509TrustManager;
+            return this;
+        }
+
         public BraintrustConfig build() {
             if (apiKey == null || apiKey.isBlank()) {
                 throw new IllegalStateException(

src/main/java/dev/braintrust/trace/BraintrustSpanExporter.java

@@ -92,6 +92,13 @@ private CompletableResultCode exportWithParent(String parent, List<SpanData> spa
                                             "Created exporter with x-bt-parent: {}", p);
                                 }
 
+                                // If SSLContext is set, then apply it
+                                if (config.sslContext() != null
+                                        && config.x509TrustManager() != null) {
+                                    exporterBuilder.setSslContext(
+                                            config.sslContext(), config.x509TrustManager());
+                                }
+
                                 return exporterBuilder.build();
                             });