first commit

core/workers/pipeline/messageHandlers/backtestHandler.js

@@ -0,0 +1,25 @@
+// Relay the backtest message it when it comes in.
+
+module.exports = done => {
+  let backtest;
+
+  return {
+    message: message => {
+      if(message.type === 'error') {
+        done(message.error);
+      }
+
+      if(message.backtest) {
+        done(null, message.backtest);
+      }
+    },
+    exit: status => {
+      if(status !== 0) {
+        if(backtest)
+          console.error('Child process died after finishing backtest');
+        else
+          done('Child process has died.');
+      }
+    }
+  }
+}

core/workers/pipeline/messageHandlers/importerHandler.js

@@ -0,0 +1,26 @@
+module.exports = cb => {
+
+  return {
+    message: message => {
+
+      if(message.event === 'marketUpdate')
+        cb(null, {
+          done: false,
+          latest: message.payload
+        })
+
+      else if(message.type === 'error') {
+        cb(message.error);
+      }
+
+      else if(message.type === 'log')
+        console.log(message.log);
+    },
+    exit: status => {
+      if(status !== 0)
+        return cb('Child process has died.');
+      else
+        cb(null, { done: true });
+    }
+  }
+}

core/workers/pipeline/messageHandlers/realtimeHandler.js

@@ -0,0 +1,24 @@
+// pass back all messages as is
+// (except for errors and logs)
+
+module.exports = cb => {
+
+  return {
+    message: message => {
+
+      if(message.type === 'error') {
+        cb(message.error);
+      }
+
+      else
+        cb(null, message);
+
+    },
+    exit: status => {
+      if(status !== 0)
+        cb('Child process has died.');
+      else
+        cb(null, { done: true });
+    }
+  }
+}