argos.deploy
Class ComponentManager

java.lang.Object
  argos.deploy.ComponentManager

public class ComponentManager
extends Object

ComponentManager is the control center for Argos, it handles deployment, redployment and stopping of services. Deployment of new service files is done by calling the public method deploy(). When this method is called it is assumed that the service is not running already. If the service is already running the loading of that service will fail. To redploy a service the method redeploy() is to be used.

Redeploy() will stop the services that are needed to be stopped including any depending services before it calls deploy() and brings those services up again.

Stopping is done in the public method stop(), it will stop the given services and all services that are dependant on the stopped services.

argos.deploy.HotDeployer is the class that will call these methods. It is however possible to call control the ComponentManager through JMX. For this the methods startService(String filename) and startService(String serviceName) has been added.

Field Summary

static String	COMPONENT_STOPPED
NotificationProxy	proxy NotifictionProxy used to send out events.
static String	SERVICE_FAILED This constant is added to notifications when a service has failed loading.
static String	SERVICE_LOADING This constant is added to notifications when a service is about to be loaded.
static String	SERVICE_STARTED This constant is added to notifications when a service has started.
static String	SERVICE_STOPPED This constant is added to notifications when the micro kernel has done everything it is suppose to do to stop the service.
static String	STOPPING_COMPONENT
static String	STOPPING_SERVICE

Method Summary

void	deploy(List<File> files)
static ComponentManager	getInstance() Gets the singelton instance of this class
MBeanNotificationInfo[]	getNotificationInfo() This method returns the types of notifications this object can broadcast
void	redeploy(List<File> files) This method will redploy the given files by stopping all the files and then deploying them with the deploy method.
void	shutdown() This method will stopp all services that has been deployed.
boolean	start(ServiceMetaInfo meta)
boolean	startService(String name) This method will start a service by filename.
void	stop(ComponentMetaInfo component)
List<File>	stop(List<ServiceMetaInfo> services) This methods stops the given services and the services that depends on them.
void	stop(ServiceMetaInfo service)
boolean	stopService(String name) This method will stop a service and only this service

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

SERVICE_STARTED

public static final String SERVICE_STARTED

This constant is added to notifications when a service has started. That means that the micro kernel has done everything it is suppose to do to stop the service.

See Also:

Constant Field Values

SERVICE_STOPPED

public static final String SERVICE_STOPPED

This constant is added to notifications when the micro kernel has done everything it is suppose to do to stop the service.

See Also:

Constant Field Values

SERVICE_LOADING

public static final String SERVICE_LOADING

This constant is added to notifications when a service is about to be loaded. That is after the class loader has been created but before any thing else is done.

See Also:

Constant Field Values

SERVICE_FAILED

public static final String SERVICE_FAILED

This constant is added to notifications when a service has failed loading.

See Also:

Constant Field Values

COMPONENT_STOPPED

public static final String COMPONENT_STOPPED

See Also:

Constant Field Values

STOPPING_COMPONENT

public static final String STOPPING_COMPONENT

See Also:

Constant Field Values

STOPPING_SERVICE

public static final String STOPPING_SERVICE

See Also:

Constant Field Values

proxy

public NotificationProxy proxy

NotifictionProxy used to send out events. See constants for what events can be sent out.

Method Detail

deploy

public void deploy(List<File> files)

start

public boolean start(ServiceMetaInfo meta)

redeploy

public void redeploy(List<File> files)

This method will redploy the given files by stopping all the files and then deploying them with the deploy method.

Parameters:

files - Files that will be redeployed

stop

public List<File> stop(List<ServiceMetaInfo> services)

This methods stops the given services and the services that depends on them.

Parameters:

metadatas - The services meta information

Returns:

A list of files (services) that were actually stopped.

stop

public void stop(ServiceMetaInfo service)

stop

public void stop(ComponentMetaInfo component)

stopService

public boolean stopService(String name)

This method will stop a service and only this service

Parameters:

name - The name of the service that will be stopped

Returns:

True if the service was stopped, false otherwise.

startService

public boolean startService(String name)

This method will start a service by filename.

Parameters:

name - The filename

Returns:

True if the service was started, false if not.

shutdown

public void shutdown()

This method will stopp all services that has been deployed.

getNotificationInfo

public MBeanNotificationInfo[] getNotificationInfo()

This method returns the types of notifications this object can broadcast

Returns:

Types of notifications

getInstance

public static ComponentManager getInstance()

Gets the singelton instance of this class

Returns:

Singelton of ComponentManager