/**
* Start this server. If we manage an own HttpServer, then the HttpServer will be started as well.
*/
public void start() {
// URL as configured takes precedence
String configUrl =
NetworkUtil.replaceExpression(config.getJolokiaConfig().get(ConfigKey.DISCOVERY_AGENT_URL));
jolokiaHttpHandler.start(
lazy, configUrl != null ? configUrl : url, config.getAuthenticator() != null);
if (httpServer != null) {
// Starting our own server in an own thread group with a fixed name
// so that the cleanup thread can recognize it.
ThreadGroup threadGroup = new ThreadGroup("jolokia");
threadGroup.setDaemon(false);
Thread starterThread =
new Thread(
threadGroup,
new Runnable() {
@Override
public void run() {
httpServer.start();
}
});
starterThread.start();
cleaner = new CleanupThread(httpServer, threadGroup);
cleaner.start();
}
}
private String detectAgentUrl(
HttpServer pServer, JolokiaServerConfig pConfig, String pContextPath) {
serverAddress = pServer.getAddress();
InetAddress realAddress;
int port;
if (serverAddress != null) {
realAddress = serverAddress.getAddress();
if (realAddress.isAnyLocalAddress()) {
try {
realAddress = NetworkUtil.getLocalAddress();
} catch (IOException e) {
try {
realAddress = InetAddress.getLocalHost();
} catch (UnknownHostException e1) {
// Ok, ok. We take the original one
realAddress = serverAddress.getAddress();
}
}
}
port = serverAddress.getPort();
} else {
realAddress = pConfig.getAddress();
port = pConfig.getPort();
}
return String.format(
"%s://%s:%d%s", pConfig.getProtocol(), realAddress.getHostAddress(), port, pContextPath);
}
/**
* Initialize the backend systems, the log handler and the restrictor. A subclass can tune this
* step by overriding {@link #createRestrictor(String)} and {@link
* #createLogHandler(ServletConfig, boolean)}
*
* @param pServletConfig servlet configuration
*/
@Override
public void init(ServletConfig pServletConfig) throws ServletException {
super.init(pServletConfig);
Configuration config = initConfig(pServletConfig);
// Create a log handler early in the lifecycle, but not too early
String logHandlerClass = config.get(ConfigKey.LOGHANDLER_CLASS);
logHandler =
logHandlerClass != null
? (LogHandler) ClassUtil.newInstance(logHandlerClass)
: createLogHandler(pServletConfig, Boolean.valueOf(config.get(ConfigKey.DEBUG)));
// Different HTTP request handlers
httpGetHandler = newGetHttpRequestHandler();
httpPostHandler = newPostHttpRequestHandler();
if (restrictor == null) {
restrictor =
createRestrictor(NetworkUtil.replaceExpression(config.get(ConfigKey.POLICY_LOCATION)));
} else {
logHandler.info("Using custom access restriction provided by " + restrictor);
}
configMimeType = config.get(ConfigKey.MIME_TYPE);
backendManager = new BackendManager(config, logHandler, restrictor);
requestHandler = new HttpRequestHandler(config, backendManager, logHandler);
initDiscoveryMulticast(config);
}
// Try to find an URL for system props or config
private String findAgentUrl(Configuration pConfig) {
// System property has precedence
String url = System.getProperty("jolokia." + ConfigKey.DISCOVERY_AGENT_URL.getKeyValue());
if (url == null) {
url = System.getenv("JOLOKIA_DISCOVERY_AGENT_URL");
if (url == null) {
url = pConfig.get(ConfigKey.DISCOVERY_AGENT_URL);
}
}
return NetworkUtil.replaceExpression(url);
}
protected JolokiaHandler(Map<String, String> configParameters, Restrictor restrictor) {
log = new JolokiaLogHandler(LoggerFactory.getLogger(JolokiaHandler.class));
Configuration config = initConfig(configParameters);
if (restrictor == null) {
restrictor =
createRestrictor(NetworkUtil.replaceExpression(config.get(ConfigKey.POLICY_LOCATION)));
}
log.info("Using restrictor " + restrictor);
BackendManager backendManager = new BackendManager(config, log, restrictor);
requestHandler = new HttpRequestHandler(config, backendManager, log);
}
/**
* Description including agent URL
*
* @return agent url
*/
@Override
public String getDescription() {
String hostDescr = host;
try {
if (hostDescr == null) {
hostDescr = NetworkUtil.getLocalAddress().getHostName();
}
} catch (IOException e) {
hostDescr = "localhost";
}
return "Jolokia Agent: http://" + hostDescr + ":" + getPort() + "/jolokia";
}
// Examines servlet config and servlet context for configuration parameters.
// Configuration from the servlet context overrides servlet parameters defined in web.xml
Configuration initConfig(ServletConfig pConfig) {
Configuration config =
new Configuration(ConfigKey.AGENT_ID, NetworkUtil.getAgentId(hashCode(), "servlet"));
// From ServletContext ....
config.updateGlobalConfiguration(new ServletConfigFacade(pConfig));
// ... and ServletConfig
config.updateGlobalConfiguration(new ServletContextFacade(getServletContext()));
// Set type last and overwrite anything written
config.updateGlobalConfiguration(
Collections.singletonMap(ConfigKey.AGENT_TYPE.getKeyValue(), "servlet"));
return config;
}
// Update the agent URL in the agent details if not already done
private void updateAgentDetailsIfNeeded(HttpServletRequest pReq) {
// Lookup the Agent URL if needed
AgentDetails details = backendManager.getAgentDetails();
if (details.isInitRequired()) {
synchronized (details) {
if (details.isInitRequired()) {
if (details.isUrlMissing()) {
String url =
getBaseUrl(
NetworkUtil.sanitizeLocalUrl(pReq.getRequestURL().toString()),
extractServletPath(pReq));
details.setUrl(url);
}
if (details.isSecuredMissing()) {
details.setSecured(pReq.getAuthType() != null);
}
details.seal();
}
}
}
}
protected Configuration initConfig(Map<String, String> params) {
Configuration config =
new Configuration(ConfigKey.AGENT_ID, NetworkUtil.getAgentId(hashCode(), "vertx"));
config.updateGlobalConfiguration(params);
return config;
}
