OpenTracing Grizzly HTTP Server Instrumentation

OpenTracing instrumentation for Grizzly HTTP Server.

OpenTracing Agents

When using a runtime agent like java-agent or java-specialagent TCPNIOTransports will be automatically instrumented as long as their FilterChain contains an HttpServerFilter. This is the case with the plain HttpServer through its constructor or HttpServer.createSimpleServer static factory methods:

HttpServer httpServer = new HttpServer();
NetworkListener listener = new NetworkListener("grizzly", "localhost", "8080");
httpServer.addListener(listener);
httpServer.start();

or

HttpServer httpServer = HttpServer.createSimpleServer();
httpServer.start();

Alternatively, chains created directly will also be instrumented automatically under the same condition:

FilterChainBuilder filterChainBuilder = FilterChainBuilder.stateless();
filterChainBuilder.add(new TransportFilter());
filterChainBuilder.add(new HttpServerFilter());
filterChainBuilder.add(new SomeWorkerFilter());
TCPNIOTransport transport = TCPNIOTransportBuilder.newInstance().build();
transport.setProcessor(filterChainBuilder.build());
transport.bind("localhost", "8080");
transport.start();

Refer to the agents’ documentation for how to include this library as an instrumentation plugin.

Non-Agent Configuration

When not using any of the OpenTracing Agents the traced filter chain instance must be instantiated directly. Use of the plain HttpServer without a runtime Agent is not currently supported.

FilterChainBuilder filterChainBuilder = new TracedFilterChainBuilder();
filterChainBuilder.add(new TransportFilter());
filterChainBuilder.add(new HttpServerFilter());
filterChainBuilder.add(new SomeWorkFilter());
...