[#389] Support Exception Chain Metadata (PExceptionMetaData)

Author: feelform

lib/context/trace/exception-builder.js

@@ -0,0 +1,39 @@
+/**
+ * Pinpoint Node.js Agent
+ * Copyright 2020-present NAVER Corp.
+ * Apache License v2.0
+ */
+
+'use strict'
+
+const { nextExceptionId } = require('./id-generator')
+
+class Exception {
+    constructor(className, message, startTime) {
+        this.className = className
+        this.message = message
+        this.startTime = startTime
+        this.exceptionId = nextExceptionId()
+        this.exceptionDepth = 1
+        this.frameStack = []
+    }
+}
+
+class ExceptionBuilder {
+    constructor(error) {
+        this.error = error
+    }
+
+    build() {
+        return new Exception(
+            this.error.name || 'Error',
+            this.error.message || '',
+            Date.now()
+        )
+    }
+}
+
+module.exports = {
+    Exception,
+    ExceptionBuilder
+}

lib/context/trace/exceptions-builder.js

@@ -0,0 +1,41 @@
+/**
+ * Pinpoint Node.js Agent
+ * Copyright 2020-present NAVER Corp.
+ * Apache License v2.0
+ */
+
+'use strict'
+
+class Exceptions {
+    constructor(traceRoot, span, exceptions) {
+        this.traceRoot = traceRoot
+        this.span = span
+        this.exceptions = exceptions
+    }
+}
+
+class ExceptionsBuilder {
+    constructor(traceRoot) {
+        this.traceRoot = traceRoot
+        this.exceptions = []
+    }
+
+    setSpan(span) {
+        this.span = span
+        return this
+    }
+
+    addException(exception) {
+        this.exceptions.push(exception)
+        return this
+    }
+
+    build() {
+        return new Exceptions(this.traceRoot, this.span, this.exceptions)
+    }
+}
+
+module.exports = {
+    Exceptions,
+    ExceptionsBuilder
+}

lib/context/trace/id-generator.js

@@ -16,6 +16,8 @@ const continuedTransactionId = new LongIdGenerator(-1001)
 const disabledId = new LongIdGenerator(-1002)
 // INITIAL_CONTINUED_DISABLED_ID in AtomicIdGenerator.java
 const continueDisabledId = new LongIdGenerator(-1003)
+// INITIAL_EXCEPTION_ID
+const exceptionId = new LongIdGenerator(1)
 
 module.exports = {
     nextTransactionId: function () {
@@ -41,5 +43,8 @@ module.exports = {
     },
     getContinuedDisabledId: function () {
         return continueDisabledId
+    },
+    nextExceptionId: function () {
+        return exceptionId.next(1)
     }
 }