Merge pull request #78 from appoptics/cc/NH-33233

NH-33233: Refactor Agent API

solarwinds-otel-sdk/src/main/java/com/appoptics/api/ext/SolarWindsAgent.java

@@ -0,0 +1,29 @@
+package com.appoptics.api.ext;
+
+import java.util.logging.Logger;
+
+public class SolarWindsAgent {
+    private SolarWindsAgent() {
+    }
+
+    private static final Logger logger = Logger.getLogger(SolarWindsAgent.class.getName());
+
+    private static boolean isAgentReady = false;
+
+    static {
+        try {
+            Class.forName("com.appoptics.opentelemetry.core.CustomTransactionNameDict");
+            isAgentReady = true;
+            logger.info("The SolarWinds APM agent and the SDK is available.");
+        } catch (ClassNotFoundException | NoClassDefFoundError | NoSuchMethodError e) {
+            logger.warning("The SolarWinds APM Agent is not available. The SDK will be no-op.");
+        }
+    }
+
+    public static boolean setTransactionName(String transactionName) {
+        if (!isAgentReady) {
+            return false;
+        }
+        return Transaction.setName(transactionName);
+    }
+}

solarwinds-otel-sdk/src/main/java/com/appoptics/api/ext/Transaction.java

@@ -0,0 +1,32 @@
+package com.appoptics.api.ext;
+
+import com.appoptics.opentelemetry.core.CustomTransactionNameDict;
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.api.trace.SpanContext;
+import io.opentelemetry.context.Context;
+
+/**
+ * The API to set the custom transaction name for the current trace. It returns false if the current trace is not valid
+ * or not sampled.
+ */
+class Transaction {
+
+    /**
+     * Set the transaction name of the current trace.
+     *
+     * @param name the custom transaction name to be set to the current trace
+     * @return {@code true} if the transaction name is successfully set, or {@code false} if the transaction name is not set because the span is invalid or the not sampled.
+     */
+    static boolean setName(String name) {
+        Context context = Context.current();
+        Span span = Span.fromContext(context);
+        SpanContext spanContext = span.getSpanContext();
+
+        if (!(spanContext.isValid() && spanContext.isSampled())) {
+            return false;
+        }
+        CustomTransactionNameDict.set(spanContext.getTraceId(), name);
+
+        return true;
+    }
+}