app.portBindings and newManifest.tcpPorts may be null

src/databaseerror.js

@@ -0,0 +1,32 @@
+/* jslint node:true */
+
+'use strict';
+
+exports = module.exports = DatabaseError;
+
+var assert = require('assert'),
+    util = require('util');
+
+function DatabaseError(reason, errorOrMessage) {
+    assert.strictEqual(typeof reason, 'string');
+    assert(errorOrMessage instanceof Error || typeof errorOrMessage === 'string' || typeof errorOrMessage === 'undefined' || errorOrMessage === null);
+
+    Error.call(this);
+    Error.captureStackTrace(this, this.constructor);
+
+    this.reason = reason;
+    if (typeof errorOrMessage === 'undefined' || errorOrMessage === null) {
+        this.message = reason;
+    } else if (typeof errorOrMessage === 'string') {
+        this.message = errorOrMessage;
+    } else {
+        this.message = 'Internal error';
+        this.nestedError = errorOrMessage;
+    }
+}
+util.inherits(DatabaseError, Error);
+
+DatabaseError.INTERNAL_ERROR = 'Internal error';
+DatabaseError.ALREADY_EXISTS = 'Entry already exist';
+DatabaseError.NOT_FOUND = 'Record not found';
+DatabaseError.BAD_FIELD = 'Invalid field';