GHNContext (The gCube Application Framework 1.7.0-SNAPSHOT API)

java.lang.Object
- org.gcube.common.core.contexts.GCUBEContext
- - org.gcube.common.core.contexts.GHNContext

Direct Known Subclasses:

GHNClientContext
```
public class GHNContext
extends GCUBEContext
```
A specialisation of GCUBEContext for gCube Hosting Nodes (gHNs).
(*) it manages the lifetime of the gHN, from its initialisation to its shutdown and failure. This functionality supports the internal operation of the gHN and remains transparent to most service developers.
(*) it exposes the configuration of the gHN and its hosting environment. This functionality allows service developers to inspect at runtime the environment in which their code is deployed.
(*) it mediates between RIs of deployed services. This functionality supports dynamic discovery of RIs and, while it is generically available to all service developers, it is key for the correct operation of the gHN and distinguished Local Services.

Clients can obtain the single instance of the GHNContext by invoking its static method getContext(). The first invocation of the method triggers the initialisation of the instance.

Author:

Manuele Simi (ISTI-CNR), Fabio Simeoni (University of Strathclyde);

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static class`	`GHNContext.Mode` GHN modes
`static class`	`GHNContext.Status` Enumerates the possible statuses of the GHN.
`static class`	`GHNContext.Type` GHN types

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`ALLOWEDSCOPES_JNDI_NAME` Name of allowedScopes Name JNDI environment.
`static String`	`CONFIGDIR_NAME` Configuration directory name.
`static String`	`CONTAINER_STATUS_JNDI_NAME` Container status system property.
`static String`	`COORDINATES_JNDI_NAME` Name of Coordinates JNDI environment.
`static String`	`COUNTRY_JNDI_NAME` Name of Country JNDI environment.
`static String`	`CUSTOMLABELS_JNDI_NAME` Name of Custom Labels JNDI environment.
`static int`	`DEFAULT_TEST_INTERVAL` Default test interval in seconds
`static long`	`DEFAULT_TRUSTEDGHNINTERVAL` Name of the interval for trusted gHNs synchronization
`static long`	`DEFAULT_UPDATE_INTERVAL` Default update interval in seconds.
`static String`	`GCF_VERSION` current gcf version
`static String`	`GHN_CLIENT_JNDI_RESOURCE` The classpath resource which contains the configuration of the GHN for client use.
`static String`	`GHN_JNDI_RESOURCE` The classpath resource which contains the configuration of the GHN.
`static String`	`GHN_TYPE` Name of GHNType JNDI environment.
`static short`	`GHN_UPDATE_ATTEMPTS` Number of attempts for GHN updates.
`protected static Properties`	`implementations` Properties set with implementations of the interfaces
`static String`	`IMPLEMENTATIONS_RESOURCE` The classpath resource which contains the current implementations of gCF interfaces.
`static String`	`INFRASTRUCTURE_NAME` Name of Coordinates JNDI environment.
`static String`	`JNDI_SERVICES_BASE_NAME` Name of the jndi root for service configurations.
`static String`	`LOCATION_JNDI_NAME` Name of Location JNDI environment.
`static String`	`MBEANS_PREFIX` Prefix for mbeans.
`static String`	`MODE_JNDI_NAME` Name of the Mode startup JNDI environment
`protected static GCUBEHostingNode`	`node` The GCUBE Hosting Node resource associated with the context.
`static String`	`OPEN_PORTS` Name of OpenPorts JNDI environment.
`static String`	`OVERRIDE_SERVICE_SECURITY` Name of Override service Security JNDI environment.
`static String`	`PROFILE_FILE_NAME` Name of the file in which the GHN is serialised.
`static String`	`PUBLISHED_HOST_NAME` The name of the host to publish in the local profiles, if different from the container's one
`static String`	`PUBLISHED_PORT_NAME` The name of the port to publish in the local profiles, if different from the container's one
`static String`	`SECURITY_JNDI_NAME` Name of Security JNDI environment.
`static int`	`SHUTDOWN_DELAY` Delay before gHN shutdown
`protected static GHNContext`	`singleton` Singleton context.
`static String`	`STARTSCOPES_JNDI_NAME` Name of startScopes Name JNDI environment.
`static String`	`STORAGE_ROOT` The absolute path to the storage root on the local file system.
`static String`	`TESTINTERVAL_JNDI_NAME` Name of the test interval JNDI environment.
`static String`	`TRUSTEDGHNINTERVAL_JNDI_NAME` Name of the interval for trusted gHNs synchronization
`static String`	`UPDATEINTERVAL_JNDI_NAME` Name of the update interval JNDI environment.

Fields inherited from class org.gcube.common.core.contexts.GCUBEContext
logger, timers

Constructor Summary

Constructors
Modifier Constructor and Description

protected GHNContext()
Creates an instance

Constructors
Modifier	Constructor and Description
`protected`	`GHNContext()` Creates an instance

Method Summary

Methods
Modifier and Type	Method and Description
`Set<GCUBEScope>`	`addScope(GCUBEScope... scopes)` Adds one or more scopes to the GHN.
`protected void`	`configureGHN(File file)` Used internally to load external configuration.
`protected void`	`configureGHNResource()` Used internally to configure the `GCUBEHostingNode` resource that models the local gHN.
`void`	`delegateCredentials(GCUBEServiceContext context, GSSCredential credentials)` Delegates credentials to a service.
`GCUBEScope[]`	`getAllowedScopes()` Returns the allowed scopes of the GHN.
`String`	`getBaseURL()` Returns the base endpoint of the gHN.
`String`	`getBaseURLToPublish()` Returns the base endpoint of the gHN.
`static GHNContext`	`getContext()` Returns a context instance.
`ArrayList<HashMap<String,String>>`	`getCPUInfo()` Returns information about the processors underlying of the gHN.
`List<String>`	`getDeployedPortTypes()` Returns the names of the port-types of the gCube services deployed in the GHN.
`File`	`getFile(String fileName, boolean... writeMode)` Gives read or write access to a `File`.
`Integer`	`getFreePort()` Returns the number of the first free port on the gHN in the range specified in the GHN configuration (`openPorts`) or, if no such range exist, in the range 60000-65000;
`long`	`getFreeSpace(String localFS)` Returns the amount of free space on a partition of the underlying file system.
`GCUBEHostingNode`	`getGHN()` Sets the GCUBE Hosting Node resource associated with the context.
`String`	`getGHNID()` Returns the GHN identifier.
`String`	`getHostDomain()` Returns the host domain of the gHN.
`String`	`getHostname()` Returns the hostname of the gHN.
`String`	`getHostnameAndPort()` Returns the hostname and port of the gHN.
`static <INTERFACE> INTERFACE`	`getImplementation(Class<INTERFACE> interfaceClass)` Returns an implementation for a gCF interface.
`String`	`getIP()` Returns the IP address.
`Map<String,Double>`	`getLoadStatistics()` Returns load statistics for the gHN.
`LocalInstanceContext`	`getLocalInstanceContext()`
`String`	`getLocation()` Returns the installation folder of the gHN.
`GHN`	`getManagementBean()` Return the management bean of the GHN.
`Map<String,Long>`	`getMemoryUsage()` Returns virtual memory statistics.
`GHNContext.Mode`	`getMode()` Gets the GHN mode.
`int`	`getPort()` Returns the port of the gHN.
`String`	`getPublishedHostDomain()` Returns the host domain of the gHN.
`String`	`getPublishedHostname()` Returns the hostname of the gHN.
`String`	`getPublishedHostnameAndPort()` Returns the hostname and port of the gHN to publish.
`int`	`getPublishedPort()` Returns the port of the gHN.
`InputStream`	`getResource(String resourceName)` Returns a classpath resource given its path.
`GCUBEServiceContext`	`getServiceContext(String serviceClass, String serviceName)` Returns the context of a registered service from its class and name.
`Set<GCUBEServiceContext>`	`getServiceContexts()` Returns all the registered service contexts (no matter about which status they have)
`String`	`getServiceEndpointPrefix()` Returns the prefix to the relative endpoint of services.
`GCUBEScope[]`	`getStartScopes()` Returns the start scopes of the GHN.
`GHNContext.Status`	`getStatus()` Returns the current status of the GHN.
`String`	`getStatusMessage()` Returns the message associated to the current status of the GHN.
`String`	`getStorageRoot()` Returns the absolute path to the storage root folder on local the file system.
`long`	`getTrustedGHNSynchInterval()` Returns the synchronization interval for the local list of trusted gHNs
`GHNContext.Type`	`getType()` Returns the GHN type.
`String`	`getUptime()` Returns the length of time since the underlying machine.
`String`	`getVirtualPlatformsLocation()` Returns the virtual platforms folder of the gHN.
`protected void`	`initialise()` Used internally to initialise the context at class loading time.
`boolean`	`isClientMode()` Indicates whether the context is running within a container or else in client mode.
`boolean`	`isGHNReady()` Checks if the GHN has completed the startup procedure.
`boolean`	`isSecurityEnabled()` Indicates whether the GHN is operating in a secure infrastructure.
`boolean`	`overrideServiceSecurity()` Indicates whether the GHN security status must override the security status of the services.
`void`	`registerService(GCUBEServiceContext context)` Registers a service context in the current node.
`Set<GCUBEScope>`	`removeScope(GCUBEScope... scopes)` Removes one or more scopes from the GHN.
`void`	`restart(String... message)` Restarts the gHN.
`void`	`restartAndClean(String... message)`
`void`	`setMode(GHNContext.Mode mode)` Sets the GHN mode.
`void`	`setStatus(GHNContext.Status newStatus, String... message)` Sets the current status of the GHN.
`void`	`shutdown(String... message)` Shuts down the gHN.
`void`	`subscribeForCredential(CredentialConsumer consumer)` Subscribes a consumer to `CredentialDelegationEvents`.
`void`	`subscribeForCredentialRequest(CredentialRequestConsumer consumer)` Subscribes a consumer to `CredentialRequestEvents`.
`void`	`subscribeGHNEvents(GHNConsumer consumer, Events.GHNTopic... topics)` Subscribes a consumer to one or more `GHNTopics`.
`void`	`unsubscribeGHNEvents(GHNConsumer consumer, Events.GHNTopic... topics)` Unsubscribe a consumer to one or more `GHNTopics`.

Methods inherited from class org.gcube.common.core.contexts.GCUBEContext
debugContext, getJNDIContext, getName, getProperty, getTiming, printContext, resetTimer, setJNDIContext

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - GCF_VERSION
```
public static final String GCF_VERSION
```
    current gcf version
    
    See Also:
    Constant Field Values
  - CUSTOMLABELS_JNDI_NAME
```
public static final String CUSTOMLABELS_JNDI_NAME
```
    Name of Custom Labels JNDI environment.
    
    See Also:
    Constant Field Values
  - COORDINATES_JNDI_NAME
```
public static final String COORDINATES_JNDI_NAME
```
    Name of Coordinates JNDI environment.
    
    See Also:
    Constant Field Values
  - COUNTRY_JNDI_NAME
```
public static final String COUNTRY_JNDI_NAME
```
    Name of Country JNDI environment.
    
    See Also:
    Constant Field Values
  - LOCATION_JNDI_NAME
```
public static final String LOCATION_JNDI_NAME
```
    Name of Location JNDI environment.
    
    See Also:
    Constant Field Values
  - SECURITY_JNDI_NAME
```
public static final String SECURITY_JNDI_NAME
```
    Name of Security JNDI environment.
    
    See Also:
    Constant Field Values
  - OVERRIDE_SERVICE_SECURITY
```
public static final String OVERRIDE_SERVICE_SECURITY
```
    Name of Override service Security JNDI environment.
    
    See Also:
    Constant Field Values
  - STARTSCOPES_JNDI_NAME
```
public static final String STARTSCOPES_JNDI_NAME
```
    Name of startScopes Name JNDI environment.
    
    See Also:
    Constant Field Values
  - ALLOWEDSCOPES_JNDI_NAME
```
public static final String ALLOWEDSCOPES_JNDI_NAME
```
    Name of allowedScopes Name JNDI environment.
    
    See Also:
    Constant Field Values
  - INFRASTRUCTURE_NAME
```
public static final String INFRASTRUCTURE_NAME
```
    Name of Coordinates JNDI environment.
    
    See Also:
    Constant Field Values
  - MODE_JNDI_NAME
```
public static final String MODE_JNDI_NAME
```
    Name of the Mode startup JNDI environment
    
    See Also:
    Constant Field Values
  - PUBLISHED_HOST_NAME
```
public static final String PUBLISHED_HOST_NAME
```
    The name of the host to publish in the local profiles, if different from the container's one
    
    See Also:
    Constant Field Values
  - PUBLISHED_PORT_NAME
```
public static final String PUBLISHED_PORT_NAME
```
    The name of the port to publish in the local profiles, if different from the container's one
    
    See Also:
    Constant Field Values
  - GHN_TYPE
```
public static final String GHN_TYPE
```
    Name of GHNType JNDI environment.
    
    See Also:
    Constant Field Values
  - OPEN_PORTS
```
public static final String OPEN_PORTS
```
    Name of OpenPorts JNDI environment.
    
    See Also:
    Constant Field Values
  - CONTAINER_STATUS_JNDI_NAME
```
public static final String CONTAINER_STATUS_JNDI_NAME
```
    Container status system property.
    
    See Also:
    Constant Field Values
  - CONFIGDIR_NAME
```
public static final String CONFIGDIR_NAME
```
    Configuration directory name.
    
    See Also:
    Constant Field Values
  - PROFILE_FILE_NAME
```
public static final String PROFILE_FILE_NAME
```
    Name of the file in which the GHN is serialised.
    
    See Also:
    Constant Field Values
  - IMPLEMENTATIONS_RESOURCE
```
public static final String IMPLEMENTATIONS_RESOURCE
```
    The classpath resource which contains the current implementations of gCF interfaces.
    
    See Also:
    Constant Field Values
  - GHN_JNDI_RESOURCE
```
public static final String GHN_JNDI_RESOURCE
```
    The classpath resource which contains the configuration of the GHN.
    
    See Also:
    Constant Field Values
  - GHN_CLIENT_JNDI_RESOURCE
```
public static final String GHN_CLIENT_JNDI_RESOURCE
```
    The classpath resource which contains the configuration of the GHN for client use.
    
    See Also:
    Constant Field Values
  - GHN_UPDATE_ATTEMPTS
```
public static final short GHN_UPDATE_ATTEMPTS
```
    Number of attempts for GHN updates.
    
    See Also:
    Constant Field Values
  - UPDATEINTERVAL_JNDI_NAME
```
public static final String UPDATEINTERVAL_JNDI_NAME
```
    Name of the update interval JNDI environment.
    
    See Also:
    Constant Field Values
  - DEFAULT_UPDATE_INTERVAL
```
public static final long DEFAULT_UPDATE_INTERVAL
```
    Default update interval in seconds.
    
    See Also:
    Constant Field Values
  - TRUSTEDGHNINTERVAL_JNDI_NAME
```
public static final String TRUSTEDGHNINTERVAL_JNDI_NAME
```
    Name of the interval for trusted gHNs synchronization
    
    See Also:
    Constant Field Values
  - DEFAULT_TRUSTEDGHNINTERVAL
```
public static final long DEFAULT_TRUSTEDGHNINTERVAL
```
    Name of the interval for trusted gHNs synchronization
    
    See Also:
    Constant Field Values
  - SHUTDOWN_DELAY
```
public static final int SHUTDOWN_DELAY
```
    Delay before gHN shutdown
    
    See Also:
    Constant Field Values
  - STORAGE_ROOT
```
public static final String STORAGE_ROOT
```
    The absolute path to the storage root on the local file system.
  - MBEANS_PREFIX
```
public static final String MBEANS_PREFIX
```
    Prefix for mbeans.
    
    See Also:
    Constant Field Values
  - DEFAULT_TEST_INTERVAL
```
public static final int DEFAULT_TEST_INTERVAL
```
    Default test interval in seconds
    
    See Also:
    Constant Field Values
  - TESTINTERVAL_JNDI_NAME
```
public static final String TESTINTERVAL_JNDI_NAME
```
    Name of the test interval JNDI environment.
    
    See Also:
    Constant Field Values
  - JNDI_SERVICES_BASE_NAME
```
public static final String JNDI_SERVICES_BASE_NAME
```
    Name of the jndi root for service configurations.
    
    See Also:
    Constant Field Values
  - implementations
```
protected static Properties implementations
```
    Properties set with implementations of the interfaces
  - singleton
```
protected static GHNContext singleton
```
    Singleton context.
  - node
```
protected static GCUBEHostingNode node
```
    The GCUBE Hosting Node resource associated with the context.
- Constructor Detail
  - GHNContext
```
protected GHNContext()
```
    Creates an instance
- Method Detail
  - getContext
```
public static GHNContext getContext()
```
    Returns a context instance.
    
    Returns:
    the instance.
  - initialise
```
protected void initialise()
                   throws Exception
```
    Used internally to initialise the context at class loading time.
    
    Throws:
    
    Exception - if the context could not be initialised.
  - isClientMode
```
public boolean isClientMode()
```
    Indicates whether the context is running within a container or else in client mode.
    
    Returns:
    true if the context is running in client mode, false otherwise
  - configureGHN
```
protected void configureGHN(File file)
                     throws Exception
```
    Used internally to load external configuration.
    
    Parameters:
    file - the configuration file.
    
    Throws:
    
    Exception - if it could not load external configuration
  - configureGHNResource
```
protected void configureGHNResource()
                             throws Exception
```
    Used internally to configure the GCUBEHostingNode resource that models the local gHN.
    
    Throws:
    
    Exception - if the resource could not be configured
  - setStatus
```
public void setStatus(GHNContext.Status newStatus,
             String... message)
               throws IllegalStateException
```
    Sets the current status of the GHN.
    
    Parameters:
    newStatus - the status.
    message - message associated to the status
    
    Throws:
    
    IllegalStateException - if the transition from the current to the new status is illegal.
  - getStatus
```
public GHNContext.Status getStatus()
```
    Returns the current status of the GHN.
    
    Returns:
    the status.
  - getStatusMessage
```
public String getStatusMessage()
```
    Returns the message associated to the current status of the GHN.
    
    Returns:
    the status message.
  - restart
```
public void restart(String... message)
```
    Restarts the gHN.
  - restartAndClean
```
public void restartAndClean(String... message)
```
  - shutdown
```
public void shutdown(String... message)
```
    Shuts down the gHN.
  - registerService
```
public void registerService(GCUBEServiceContext context)
                     throws Exception
```
    Registers a service context in the current node.
    
    Parameters:
    context - the context.
    
    Throws:
    
    Exception - if the service is already registered or the registration could not be completed.
    
    IllegalStateException - if the container is down.
  - getServiceContext
```
public GCUBEServiceContext getServiceContext(String serviceClass,
                                    String serviceName)
                                      throws Exception
```
    Returns the context of a registered service from its class and name.
    
    Parameters:
    serviceClass - the service class.
    serviceName - the service name.
    
    Returns:
    the service context.
    
    Throws:
    
    Exception - if the service is not registered.
    
    IllegalStateException - if the gHN is down.
  - getServiceContexts
```
public Set<GCUBEServiceContext> getServiceContexts()
                                            throws Exception
```
    Returns all the registered service contexts (no matter about which status they have)
    
    Returns:
    the Set of all service contexts
    
    Throws:
    
    Exception - if there is no service registered.
    
    IllegalStateException - if the gHN is down.
  - subscribeGHNEvents
```
public void subscribeGHNEvents(GHNConsumer consumer,
                      Events.GHNTopic... topics)
                        throws Exception
```
    Subscribes a consumer to one or more GHNTopics.
    
    Parameters:
    consumer - the consumer.
    topics - the topics of interest.
    
    Throws:
    
    Exception - if the subscription could not be completed.
  - unsubscribeGHNEvents
```
public void unsubscribeGHNEvents(GHNConsumer consumer,
                        Events.GHNTopic... topics)
```
    Unsubscribe a consumer to one or more GHNTopics.
    
    Parameters:
    consumer - the consumer.
    topics - the topics.
  - isSecurityEnabled
```
public boolean isSecurityEnabled()
```
    Indicates whether the GHN is operating in a secure infrastructure.
    
    Returns:
    true if its is, false otherwise.
  - overrideServiceSecurity
```
public boolean overrideServiceSecurity()
```
    Indicates whether the GHN security status must override the security status of the services.
    
    Returns:
    true if its is, false otherwise.
  - subscribeForCredentialRequest
```
public void subscribeForCredentialRequest(CredentialRequestConsumer consumer)
                                   throws Exception
```
    Subscribes a consumer to CredentialRequestEvents.
    
    Parameters:
    consumer - the consumer.
    
    Throws:
    
    Exception - if the subscription could not be completed.
  - subscribeForCredential
```
public void subscribeForCredential(CredentialConsumer consumer)
                            throws Exception
```
    Subscribes a consumer to CredentialDelegationEvents.
    
    Parameters:
    consumer - the consumer.
    
    Throws:
    
    Exception - if the subscription could not be completed.
  - delegateCredentials
```
public void delegateCredentials(GCUBEServiceContext context,
                       GSSCredential credentials)
```
    Delegates credentials to a service.
    
    Parameters:
    context - the service context.
    credentials - the credentials.
  - addScope
```
public Set<GCUBEScope> addScope(GCUBEScope... scopes)
                         throws GCUBEResource.InvalidScopeException
```
    Adds one or more scopes to the GHN.
    
    Parameters:
    scopes - the scopes.
    
    Returns:
    the list of scopes actually added to the GHN.
    
    Throws:
    
    GCUBEResource.InvalidScopeException
  - removeScope
```
public Set<GCUBEScope> removeScope(GCUBEScope... scopes)
```
    Removes one or more scopes from the GHN. Only scopes currently associated with the instance are actually removed.
  - getImplementation
```
public static <INTERFACE> INTERFACE getImplementation(Class<INTERFACE> interfaceClass)
                                   throws Exception
```
    Returns an implementation for a gCF interface. The implementation class is configured in the classpath resource implementations.property found in the GHN's configuration folder.
    
    Type Parameters:
    INTERFACE - the interface.
    Parameters:
    interfaceClass - the Class of the interface.
    
    Returns:
    the implementation, or null if an implementation could not be found.
    
    Throws:
    
    Exception - if the implementation is not compatible with the interface or could not be instantiated.
  - getFile
```
public File getFile(String fileName,
           boolean... writeMode)
             throws IllegalArgumentException
```
    Gives read or write access to a File. Write access induces backups and read access relies on backups to recover from failures.
    
    Overrides:
    
    getFile in class GCUBEContext
    
    Parameters:
    fileName - the file path.
    writeMode - (optional) the access mode, true for write access and false for read access (default).
    
    Returns:
    the file.
    
    Throws:
    
    IllegalArgumentException - if access is in write mode and the path is to a folder.
  - getResource
```
public InputStream getResource(String resourceName)
```
    Returns a classpath resource given its path. By default, a relative path is resolved with respect to the context implementation.
    
    Overrides:
    
    getResource in class GCUBEContext
    
    Returns:
    the resource, or null if the path could not be resolved.
  - getGHNID
```
public String getGHNID()
```
    Returns the GHN identifier.
    
    Returns:
    the identifier.
  - isGHNReady
```
public boolean isGHNReady()
```
    Checks if the GHN has completed the startup procedure.
    
    Returns:
    true if the GHN is started, false otherwise.
  - getManagementBean
```
public GHN getManagementBean()
```
    Return the management bean of the GHN.
    
    Returns:
    the bean.
  - getGHN
```
public GCUBEHostingNode getGHN()
```
    Sets the GCUBE Hosting Node resource associated with the context.
    
    Returns:
    the resource
  - getMode
```
public GHNContext.Mode getMode()
```
    Gets the GHN mode.
    
    Returns:
    the mode.
  - getType
```
public GHNContext.Type getType()
```
    Returns the GHN type.
    
    Returns:
    the type.
  - setMode
```
public void setMode(GHNContext.Mode mode)
```
    Sets the GHN mode.
    
    Parameters:
    mode - the new mode.
  - getFreePort
```
public Integer getFreePort()
                    throws RuntimeException,
                           Exception
```
    Returns the number of the first free port on the gHN in the range specified in the GHN configuration (openPorts) or, if no such range exist, in the range 60000-65000;
    
    Returns:
    the port number.
    
    Throws:
    
    Exception - if no free port could be found.
    
    RuntimeException - if no free port-configuration was found.
  - getDeployedPortTypes
```
public List<String> getDeployedPortTypes()
                                  throws Exception,
                                         IllegalStateException
```
    Returns the names of the port-types of the gCube services deployed in the GHN.
    
    Returns:
    the names.
    
    Throws:
    
    Exception - if the names could not be returned.
    
    IllegalStateException - if the query fails
  - getStartScopes
```
public GCUBEScope[] getStartScopes()
```
    Returns the start scopes of the GHN.
    
    Returns:
    the start scopes.
  - getAllowedScopes
```
public GCUBEScope[] getAllowedScopes()
```
    Returns the allowed scopes of the GHN.
    
    Returns:
    the allowed scopes.
  - getTrustedGHNSynchInterval
```
public long getTrustedGHNSynchInterval()
```
    Returns the synchronization interval for the local list of trusted gHNs
    
    Returns:
    the synchronization interval for the local list of trusted gHNs
  - getLocation
```
public String getLocation()
```
    Returns the installation folder of the gHN.
    
    Returns:
    the installation folder.
  - getVirtualPlatformsLocation
```
public String getVirtualPlatformsLocation()
```
    Returns the virtual platforms folder of the gHN.
    
    Returns:
    the folder where local virtual platforms are deployed
  - getBaseURL
```
public String getBaseURL()
                  throws IOException
```
    Returns the base endpoint of the gHN.
    
    Returns:
    the endpoint in the form host:port.
    
    Throws:
    
    IOException - if the endpoint could not be identified.
  - getBaseURLToPublish
```
public String getBaseURLToPublish()
                           throws IOException
```
    Returns the base endpoint of the gHN.
    
    Returns:
    the endpoint in the form host:port.
    
    Throws:
    
    IOException - if the endpoint could not be identified.
  - getPublishedPort
```
public int getPublishedPort()
```
    Returns the port of the gHN.
    
    Returns:
    the port.
  - getPort
```
public int getPort()
```
    Returns the port of the gHN.
    
    Returns:
    the port.
  - getPublishedHostname
```
public String getPublishedHostname()
```
    Returns the hostname of the gHN.
    
    Returns:
    the hostname.
    
    Throws:
    
    IOException - if the hostname could not be returned.
  - getLocalInstanceContext
```
public LocalInstanceContext getLocalInstanceContext()
```
  - getHostname
```
public String getHostname()
```
    Returns the hostname of the gHN.
    
    Returns:
    the hostname.
    
    Throws:
    
    IOException - if the hostname could not be returned.
  - getServiceEndpointPrefix
```
public String getServiceEndpointPrefix()
```
    Returns the prefix to the relative endpoint of services.
    
    Returns:
    the prefix.
  - getStorageRoot
```
public String getStorageRoot()
```
    Returns the absolute path to the storage root folder on local the file system.
    
    Returns:
    the path.
  - getFreeSpace
```
public long getFreeSpace(String localFS)
```
    Returns the amount of free space on a partition of the underlying file system.
    
    Parameters:
    localFS - the partition name.
    
    Returns:
    the free available space in bytes in a String format
  - getUptime
```
public String getUptime()
```
    Returns the length of time since the underlying machine.
    
    Returns:
    the uptime of the machine.
  - getMemoryUsage
```
public Map<String,Long> getMemoryUsage()
```
    Returns virtual memory statistics.
    Returns:
    a map with the following keys:
    
    "ramVirtualAvailable"
    "ramVirtualSize"
  - getCPUInfo
```
public ArrayList<HashMap<String,String>> getCPUInfo()
```
    Returns information about the processors underlying of the gHN.
    Returns:
    a list of processor-specific maps with the following keys:
    
    "vendor_id"
    "cpu_family"
    "model"
    "model_name"
    "cpu_MHz"
    "cache_size"
    "bogomips"
  - getLoadStatistics
```
public Map<String,Double> getLoadStatistics()
```
    Returns load statistics for the gHN.
    Returns:
    a map with the following keys:
    
    1min: report the load of the last minute
    
    5mins: report the load of the last 5 minutes
    
    15mins: report the load of the last 1S5 minutes
  - getIP
```
public String getIP()
```
    Returns the IP address.
    
    Returns:
    the address.
  - getHostnameAndPort
```
public String getHostnameAndPort()
```
    Returns the hostname and port of the gHN.
    
    Returns:
    a string with the format hostname:port.
  - getPublishedHostnameAndPort
```
public String getPublishedHostnameAndPort()
```
    Returns the hostname and port of the gHN to publish. These could be different from the effective ones when a proxy or dispatcher is dedicated to manage incoming calls
    
    Returns:
    a string with the format hostname:port.
  - getHostDomain
```
public String getHostDomain()
                     throws IOException
```
    Returns the host domain of the gHN.
    
    Returns:
    the host domain.
    
    Throws:
    
    IOException - if the host domain could not identified.
  - getPublishedHostDomain
```
public String getPublishedHostDomain()
                              throws IOException
```
    Returns the host domain of the gHN.
    
    Returns:
    the host domain.
    
    Throws:
    
    IOException - if the host domain could not identified.

Class GHNContext

Nested Class Summary

Field Summary

Fields inherited from class org.gcube.common.core.contexts.GCUBEContext

Constructor Summary

Method Summary

Methods inherited from class org.gcube.common.core.contexts.GCUBEContext

Methods inherited from class java.lang.Object

Field Detail

GCF_VERSION

CUSTOMLABELS_JNDI_NAME

COORDINATES_JNDI_NAME

COUNTRY_JNDI_NAME

LOCATION_JNDI_NAME

SECURITY_JNDI_NAME

OVERRIDE_SERVICE_SECURITY

STARTSCOPES_JNDI_NAME

ALLOWEDSCOPES_JNDI_NAME

INFRASTRUCTURE_NAME

MODE_JNDI_NAME

PUBLISHED_HOST_NAME

PUBLISHED_PORT_NAME

GHN_TYPE

OPEN_PORTS

CONTAINER_STATUS_JNDI_NAME

CONFIGDIR_NAME

PROFILE_FILE_NAME

IMPLEMENTATIONS_RESOURCE

GHN_JNDI_RESOURCE

GHN_CLIENT_JNDI_RESOURCE

GHN_UPDATE_ATTEMPTS

UPDATEINTERVAL_JNDI_NAME

DEFAULT_UPDATE_INTERVAL

TRUSTEDGHNINTERVAL_JNDI_NAME

DEFAULT_TRUSTEDGHNINTERVAL

SHUTDOWN_DELAY

STORAGE_ROOT

MBEANS_PREFIX

DEFAULT_TEST_INTERVAL

TESTINTERVAL_JNDI_NAME

JNDI_SERVICES_BASE_NAME

implementations

singleton

node

Constructor Detail

GHNContext

Method Detail

getContext

initialise

isClientMode

configureGHN

configureGHNResource

setStatus

getStatus

getStatusMessage

restart

restartAndClean

shutdown

registerService

getServiceContext

getServiceContexts

subscribeGHNEvents

unsubscribeGHNEvents

isSecurityEnabled

overrideServiceSecurity

subscribeForCredentialRequest

subscribeForCredential

delegateCredentials

addScope

removeScope

getImplementation

getFile

getResource

getGHNID

isGHNReady

getManagementBean

getGHN

getMode

getType

setMode