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package com.sun.enterprise.ee.admin.lbadmin.lifecycle;
import com.sun.appserv.server.ServerLifecycle;
import com.sun.appserv.server.ServerLifecycleImpl;
import com.sun.appserv.server.ServerLifecycleException;
import com.sun.enterprise.admin.event.ConfigChangeEvent;
import com.sun.enterprise.admin.event.ConfigChangeEventListener;
import com.sun.enterprise.admin.server.core.AdminService;
import com.sun.enterprise.config.ConfigContext;
import com.sun.enterprise.config.ConfigContextEventListener;
import com.sun.enterprise.server.ServerContext;
import com.sun.enterprise.admin.monitor.registry.MonitoringLevel;
/**
* Lifecycle manager for load balancer administration service.
*
* @author Harsha R A
* @since Appserver 9.0
*/
public class LoadbalancerAdminLifeCycle extends ServerLifecycleImpl {
/**
* Constant denoting the status of load balancer admin service not started
*/
public static final byte STATUS_NOT_STARTED = 0;
/**
* Constant denoting the status of load balancer admin service shutdown started
*/
public static final byte STATUS_SHUTDOWN = 1;
/**
* Constant denoting the status of load balancer admin service initialized
*/
public static final byte STATUS_INITED = 2;
/**
* Constant denoting the status of load balancer admin service started
*/
public static final byte STATUS_STARTED = 4;
/**
* Constant denoting the status of load balancer admin service ready
*/
public static final byte STATUS_READY = 8;
/**
* Constant denoting the status of load balancer admin service terminated
*/
public static final byte STATUS_TERMINATED = 0;
private byte serverStatus;
/**
* Default constructor
*/
public LoadbalancerAdminLifeCycle() {
serverStatus = STATUS_NOT_STARTED;
}
/**
* Server is initializing load balancer admin service and setting up the runtime
* environment.
*
* @param sc ServerContext the server runtime context.
*
* @exception IllegalStateException if this subsystem has already been
* started
* @exception ServerLifecycleException if this subsystem detects a fatal
* error that prevents this subsystem from being used
*/
public void onInitialization(ServerContext sc)
throws ServerLifecycleException {
if ((serverStatus & STATUS_INITED) == STATUS_INITED) {
throw new IllegalStateException(
"load balancer Admin is already initialized");
}
serverStatus = STATUS_INITED;
}
/**
* Server is starting up applications.
*
* @param sc ServerContext the server runtime context.
*
* @exception ServerLifecycleException if this subsystem detects a fatal
* error that prevents this subsystem from being used
*/
public void onStartup(ServerContext sc) throws ServerLifecycleException {
serverStatus |= STATUS_STARTED;
}
/**
* Server has completed loading the services and is ready to serve requests.
*
* @param sc ServerContext the server runtime context.
*
* @exception ServerLifecycleException if this subsystem detects a fatal
* error that prevents this subsystem from being used
*/
public void onReady(ServerContext sc) throws ServerLifecycleException {
serverStatus |= STATUS_READY;
AdminService adminService = AdminService.getAdminService();
if(adminService.isDas()) {
ConfigContext ctx = adminService.getAdminContext()
.getAdminConfigContext();
ConfigContextEventListener el = new LoadbalancerAdminEventListener();
ctx.addConfigContextEventListener(el);
}
}
/**
* Server is shutting down applications.
*
* @exception ServerLifecycleException if this subsystem detects a fatal
* error that prevents this subsystem from being used
*/
public void onShutdown() throws ServerLifecycleException {
serverStatus |= STATUS_SHUTDOWN;
}
/**
* Server is terminating the subsystems and the runtime environment.
* Gracefully terminate the active use of the public methods of this
* subsystem. This method should be the last one called on a given
* instance of this subsystem.
*
* @exception ServerLifecycleException if this subsystem detects a fatal
* error that prevents this subsystem from being used
*/
public void onTermination() throws ServerLifecycleException {
serverStatus = STATUS_TERMINATED;
}
}