/**
* 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);
}