3 files changed, 136 insertions, 0 deletions
diff --git a/src/com/p4square/restlet/metrics/MetricRouter.java b/src/com/p4square/restlet/metrics/MetricRouter.java
new file mode 100644
index 0000000..d4da270
--- /dev/null
+++ b/src/com/p4square/restlet/metrics/MetricRouter.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2014 Jesse Morgan
+ */
+
+package com.p4square.restlet.metrics;
+
+import com.codahale.metrics.Counter;
+import com.codahale.metrics.MetricRegistry;
+import com.codahale.metrics.Timer;
+
+import org.restlet.Context;
+import org.restlet.Request;
+import org.restlet.Response;
+import org.restlet.Restlet;
+import org.restlet.routing.TemplateRoute;
+import org.restlet.routing.Router;
+
+/**
+ * 
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public class MetricRouter extends Router {
+
+    private final MetricRegistry mMetricRegistry;
+
+    public MetricRouter(Context context, MetricRegistry metrics) {
+        super(context);
+        mMetricRegistry = metrics;
+    }
+
+    @Override
+    protected void doHandle(Restlet next, Request request, Response response) {
+        String baseName;
+        if (next instanceof TemplateRoute) {
+            TemplateRoute temp = (TemplateRoute) next;
+            baseName = MetricRegistry.name("MetricRouter", temp.getTemplate().getPattern());
+        } else {
+            baseName = MetricRegistry.name("MetricRouter", "unknown");
+        }
+
+        final Timer.Context aggTimer = mMetricRegistry.timer("MetricRouter.time").time();
+        final Timer.Context timer = mMetricRegistry.timer(baseName + ".time").time();
+
+        try {
+            super.doHandle(next, request, response);
+        } finally {
+            timer.stop();
+            aggTimer.stop();
+
+            // Record status code
+            boolean success = !response.getStatus().isError();
+            if (success) {
+                mMetricRegistry.counter("MetricRouter.success").inc();
+                mMetricRegistry.counter(baseName + ".response.success").inc();
+            } else {
+                mMetricRegistry.counter("MetricRouter.failure").inc();
+                mMetricRegistry.counter(baseName + ".response.failure").inc();
+            }
+        }
+    }
+}
diff --git a/src/com/p4square/restlet/metrics/MetricsApplication.java b/src/com/p4square/restlet/metrics/MetricsApplication.java
new file mode 100644
index 0000000..6caf742
--- /dev/null
+++ b/src/com/p4square/restlet/metrics/MetricsApplication.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2014 Jesse Morgan
+ */
+
+package com.p4square.restlet.metrics;
+
+import java.util.concurrent.TimeUnit;
+
+import com.codahale.metrics.MetricRegistry;
+import com.codahale.metrics.json.MetricsModule;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import org.restlet.Application;
+import org.restlet.Restlet;
+import org.restlet.resource.Finder;
+
+/**
+ * 
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public class MetricsApplication extends Application {
+    static final ObjectMapper MAPPER;
+    static {
+       MAPPER = new ObjectMapper();
+       MAPPER.registerModule(new MetricsModule(TimeUnit.SECONDS, TimeUnit.MILLISECONDS, true));
+    }
+
+    private final MetricRegistry mMetricRegistry;
+
+    public MetricsApplication(MetricRegistry metrics) {
+        mMetricRegistry = metrics;
+    }
+
+    public MetricRegistry getMetricRegistry() {
+        return mMetricRegistry;
+    }
+
+    @Override
+    public Restlet createInboundRoot() {
+        return new Finder(getContext(), MetricsResource.class);
+    }
+}
diff --git a/src/com/p4square/restlet/metrics/MetricsResource.java b/src/com/p4square/restlet/metrics/MetricsResource.java
new file mode 100644
index 0000000..e2ab14d
--- /dev/null
+++ b/src/com/p4square/restlet/metrics/MetricsResource.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2014 Jesse Morgan
+ */
+
+package com.p4square.restlet.metrics;
+
+import com.codahale.metrics.MetricRegistry;
+
+import org.restlet.ext.jackson.JacksonRepresentation;
+import org.restlet.representation.Representation;
+import org.restlet.resource.ServerResource;
+
+/**
+ * 
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public class MetricsResource extends ServerResource {
+
+    private MetricRegistry mMetricRegistry;
+
+    @Override
+    public void doInit() {
+        mMetricRegistry = ((MetricsApplication) getApplication()).getMetricRegistry();
+    }
+
+    @Override
+    protected Representation get() {
+        JacksonRepresentation<MetricRegistry> rep = new JacksonRepresentation<>(mMetricRegistry);
+        rep.setObjectMapper(MetricsApplication.MAPPER);
+        return rep;
+    }
+}