separate template file for each tab, integrated c3

stagemonitor-web/build.gradle

@@ -2,6 +2,7 @@ dependencies {
 	compile project(":stagemonitor-requestmonitor")
 	compile project(":stagemonitor-jvm")
 	compile project(":stagemonitor-jdbc")
+	compile 'io.dropwizard.metrics:metrics-servlets:3.1.0'
 	compile 'net.sf.uadetector:uadetector-resources:2014.08'
 	provided 'javax.servlet:javax.servlet-api:3.0.1'
 

stagemonitor-web/src/main/java/org/stagemonitor/web/WebPlugin.java

@@ -9,6 +9,10 @@
 import java.util.Map;
 import java.util.regex.Pattern;
 
+import javax.servlet.ServletContextEvent;
+import javax.servlet.ServletContextListener;
+import javax.servlet.annotation.WebListener;
+
 import com.codahale.metrics.MetricRegistry;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -19,7 +23,8 @@
 import org.stagemonitor.core.pool.MBeanPooledResourceImpl;
 import org.stagemonitor.core.pool.PooledResourceMetricsRegisterer;
 
-public class WebPlugin implements StagemonitorPlugin {
+@WebListener
+public class WebPlugin implements StagemonitorPlugin, ServletContextListener {
 
 	public static final String WEB_PLUGIN = "Web Plugin";
 	private final Logger logger = LoggerFactory.getLogger(getClass());
@@ -251,4 +256,13 @@ public Collection<String> getExcludedRequestPaths() {
 	public boolean isMonitorOnlyForwardedRequests() {
 		return monitorOnlyForwardedRequests.getValue();
 	}
+
+	@Override
+	public void contextInitialized(ServletContextEvent sce) {
+		//To change body of implemented methods use File | Settings | File Templates.
+	}
+
+	@Override
+	public void contextDestroyed(ServletContextEvent sce) {
+	}
 }

stagemonitor-web/src/main/java/org/stagemonitor/web/metrics/StagemonitorMetricsServlet.java

@@ -0,0 +1,70 @@
+package org.stagemonitor.web.metrics;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.concurrent.TimeUnit;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import com.codahale.metrics.MetricFilter;
+import com.codahale.metrics.MetricRegistry;
+import com.codahale.metrics.json.MetricsModule;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.ObjectWriter;
+import org.stagemonitor.core.Stagemonitor;
+import org.stagemonitor.core.util.JsonUtils;
+import org.stagemonitor.web.WebPlugin;
+
+@WebServlet("/stagemonitor/metrics")
+public class StagemonitorMetricsServlet extends HttpServlet {
+
+	private final MetricRegistry registry;
+	private final WebPlugin webPlugin;
+	private final ObjectMapper mapper;
+
+	public StagemonitorMetricsServlet() {
+		this(Stagemonitor.getMetricRegistry(), Stagemonitor.getConfiguration(WebPlugin.class), JsonUtils.getMapper());
+		JsonUtils.getMapper().registerModule(new MetricsModule(TimeUnit.SECONDS, TimeUnit.SECONDS, false, MetricFilter.ALL));
+	}
+
+	public StagemonitorMetricsServlet(MetricRegistry registry, WebPlugin webPlugin, ObjectMapper mapper) {
+		this.registry = registry;
+		this.webPlugin = webPlugin;
+		this.mapper = mapper;
+	}
+
+	@Override
+	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+		if (webPlugin.isWidgetEnabled()) {
+			resp.setContentType("application/json");
+//			if (allowedOrigin != null) {
+			resp.setHeader("Access-Control-Allow-Origin", "*");
+//			}
+			resp.setHeader("Cache-Control", "must-revalidate,no-cache,no-store");
+			resp.setStatus(HttpServletResponse.SC_OK);
+
+			final OutputStream output = resp.getOutputStream();
+			try {
+//				if (jsonpParamName != null && req.getParameter(jsonpParamName) != null) {
+//					getWriter(req).writeValue(output, new JSONPObject(req.getParameter(jsonpParamName), registry));
+//				} else {
+				getWriter(req).writeValue(output, registry);
+//				}
+			} finally {
+				output.close();
+			}
+		} else {
+			resp.sendError(HttpServletResponse.SC_NOT_FOUND);
+		}
+	}
+
+	private ObjectWriter getWriter(HttpServletRequest request) {
+		if (Boolean.parseBoolean(request.getParameter("pretty"))) {
+			return mapper.writerWithDefaultPrettyPrinter();
+		}
+		return mapper.writer();
+	}
+}