public synchronized boolean isRunning() {
    return running;
  }
Agent implementation that controls the HTTP server end points used for REST clients to connect
gemfire data node.
<p>
The RestAgent is used to start http service in embedded mode on any non manager data node with
developer REST APIs service enabled.

@since GemFire 8.0
geode-core/src/main/java/org/apache/geode/management/internal/RestAgent.java