org.eclipse.persistence.sessions.coordination

Class TransportManager

java.lang.Object

org.eclipse.persistence.sessions.coordination.TransportManager

Direct Known Subclasses:

BroadcastTransportManager, CORBATransportManager, RMITransportManager

public abstract class TransportManager
extends java.lang.Object

Purpose: Provide an abstract class that offers a common API to handling remote command connections.

Description: This class manages the remote connections to other RCM service instances and posts the local connection to this service instance in a name service so that other RCM service instances can connect to it.

Author:

Steven Vo

Since:

OracleAS TopLink 10g (9.0.4)

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Hashtable	connectionsToExternalServices Connections to other services
static java.lang.String	DEFAULT_CONTEXT_FACTORY Default JNDI properties for remote access
static java.lang.String	DEFAULT_DEDICATED_CONNECTION_KEY
static java.lang.String	DEFAULT_DEDICATED_CONNECTION_VALUE
static java.lang.String	DEFAULT_IIOP_URL_PORT
static java.lang.String	DEFAULT_IIOP_URL_PROTOCOL
static int	DEFAULT_NAMING_SERVICE
static boolean	DEFAULT_REMOVE_CONNECTION_ON_ERROR_MODE
static java.lang.String	DEFAULT_URL_PORT
static java.lang.String	DEFAULT_URL_PROTOCOL Defaults for RMI applications
static java.lang.String	DEFAULT_USER_NAME
static int	JNDI_NAMING_SERVICE Valid values for naming service type
protected org.eclipse.persistence.internal.sessions.coordination.RemoteConnection	localConnection The remote command connection to this transport
protected java.util.Hashtable	localContextProperties Properties to obtain the context used for local JNDI access
protected int	namingServiceType The type of naming service used to look up other connections
protected RemoteCommandManager	rcm The RCM that manages this transport
static int	REGISTRY_NAMING_SERVICE
protected java.util.Hashtable	remoteContextProperties Properties to obtain the context used for remote JNDI access
protected boolean	shouldRemoveConnectionOnError Determines whether a connection should be discarded if an error occurs on it

Constructor Summary

Constructors

Constructor and Description
TransportManager()

Method Summary

Methods

Modifier and Type	Method and Description
void	addConnectionToExternalService(org.eclipse.persistence.internal.sessions.coordination.RemoteConnection connection) INTERNAL: Add a remote Connection to a remote service.
void	connectBackToRemote(org.eclipse.persistence.internal.sessions.coordination.RemoteConnection connection) INTERNAL: This method is called by the remote command manager when this service should connect back ('handshake') to the service from which this remote connection came.
abstract org.eclipse.persistence.internal.sessions.coordination.RemoteConnection	createConnection(ServiceId serviceId) INTERNAL: Return a remote connection to the specified service
void	createConnections() INTERNAL: Does nothing by default.
DiscoveryManager	createDiscoveryManager() ADVANCED: Factory of new DiscoveryManager for different transports.
abstract void	createLocalConnection() INTERNAL: Put the remote connection to local host in naming service and return the of the created remote connection
protected java.lang.String	decrypt(java.lang.String encryptedPwd) INTERNAL: Security method called by the children classes
void	discardConnections() INTERNAL: Remove all remote connections for its list and the local connection from JNDI or JMS Subsriber
protected java.lang.String	encrypt(java.lang.String pwd) INTERNAL: Security method.
java.util.Hashtable	getConnectionsToExternalServices() INTERNAL:
java.util.Hashtable	getConnectionsToExternalServicesForCommandPropagation() INTERNAL: Returns clone of the original map.
org.eclipse.persistence.internal.sessions.coordination.RemoteConnection	getConnectionToLocalHost() INTERNAL: Return a remote connection to this service
javax.naming.Context	getContext(java.util.Hashtable contextProperties) INTERNAL: Helper method to get a naming context.
java.lang.String	getEncryptedPassword() PUBLIC: Return the encrypted (assumed) password used as the value to the SECURITY_CREDENTIALS key in the cached context properties.
java.lang.String	getInitialContextFactoryName() PUBLIC: Return the context factory name used as the value to the INITIAL_CONTEXT_FACTORY key in the cached context properties.
java.util.Hashtable	getLocalContextProperties() ADVANCED: Return the properties that will be used to create the initial context for local JNDI access.
int	getNamingServiceType() PUBLIC: Return the type of naming service used to look up remote connections to other service instances.
java.lang.String	getPassword() PUBLIC: Return the password used as the value to the SECURITY_CREDENTIALS key in the cached context properties.
RemoteCommandManager	getRemoteCommandManager() INTERNAL:
java.util.Hashtable	getRemoteContextProperties() ADVANCED: Return the cached properties that will be used to create the initial context when doing remote JNDI lookups.
javax.naming.Context	getRemoteHostContext(java.lang.String remoteHostURL) INTERNAL: Return the context used for looking up in the JNDI space of the specified remote URL.
java.lang.String	getUserName() PUBLIC: Return the user name used as the value to the SECURITY_PRINCIPAL key in the cached context properties.
protected boolean	hasPassword() INTERNAL:
void	initialize() INTERNAL: Initialize default properties.
void	removeAllConnectionsToExternalServices() INTERNAL: Remove all remote connections from the list.
void	removeConnectionToExternalService(org.eclipse.persistence.internal.sessions.coordination.RemoteConnection connection) INTERNAL: Remove a remote connection from the list of connections to receive remote commands.
abstract void	removeLocalConnection() ADVANCED: Remove the local connection from remote accesses.
void	setEncryptedPassword(java.lang.String encryptedPassword) ADVANCED: Set the encrypted password used as the value to the SECURITY_CREDENTIALS key in the cached context properties.
void	setEncryptionClassName(java.lang.String encryptionClassName) INTERNAL SECURITY: Set encryption class that will be loaded by the SecurableObjectHolder
void	setInitialContextFactoryName(java.lang.String contextFactoryName) ADVANCED: Set the context factory name used as the value to the INITIAL_CONTEXT_FACTORY key in the cached context properties.
void	setLocalContextProperties(java.util.Hashtable properties) ADVANCED: Set the properties that will be used to create the initial context for local JNDI access.
void	setNamingServiceType(int serviceType) ADVANCED: Set the type of naming service used to look up remote connections to other service instances.
void	setPassword(java.lang.String password) ADVANCED: Set the password used as the value to the SECURITY_CREDENTIALS key in the cached context properties.
void	setRemoteContextProperties(java.util.Hashtable properties) ADVANCED: Set the cached properties that will be used to create the initial context when doing remote JNDI lookups.
void	setShouldRemoveConnectionOnError(boolean shouldRemoveConnectionOnError) PUBLIC: Set whether connections to remote services should be disconnected when an error occurs.
void	setUserName(java.lang.String userName) ADVANCED: Set the user name used as the value to the SECURITY_PRINCIPAL key in the cached context properties.
boolean	shouldRemoveConnectionOnError() PUBLIC: Return whether connections to remote services should be disconnected when an error occurs.

Methods inherited from class java.lang.Object

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

Field Detail

localConnection

protected org.eclipse.persistence.internal.sessions.coordination.RemoteConnection localConnection

The remote command connection to this transport

rcm

protected RemoteCommandManager rcm

The RCM that manages this transport

namingServiceType

protected int namingServiceType

The type of naming service used to look up other connections

localContextProperties

protected java.util.Hashtable localContextProperties

Properties to obtain the context used for local JNDI access

remoteContextProperties

protected java.util.Hashtable remoteContextProperties

Properties to obtain the context used for remote JNDI access

shouldRemoveConnectionOnError

protected boolean shouldRemoveConnectionOnError

Determines whether a connection should be discarded if an error occurs on it

connectionsToExternalServices

protected java.util.Hashtable connectionsToExternalServices

Connections to other services

DEFAULT_REMOVE_CONNECTION_ON_ERROR_MODE

public static final boolean DEFAULT_REMOVE_CONNECTION_ON_ERROR_MODE

See Also:

Constant Field Values

JNDI_NAMING_SERVICE

public static final int JNDI_NAMING_SERVICE

Valid values for naming service type

See Also:

Constant Field Values

REGISTRY_NAMING_SERVICE

public static final int REGISTRY_NAMING_SERVICE

See Also:

Constant Field Values

DEFAULT_URL_PROTOCOL

public static final java.lang.String DEFAULT_URL_PROTOCOL

Defaults for RMI applications

See Also:

Constant Field Values

DEFAULT_IIOP_URL_PROTOCOL

public static final java.lang.String DEFAULT_IIOP_URL_PROTOCOL

See Also:

Constant Field Values

DEFAULT_URL_PORT

public static final java.lang.String DEFAULT_URL_PORT

See Also:

Constant Field Values

DEFAULT_IIOP_URL_PORT

public static final java.lang.String DEFAULT_IIOP_URL_PORT

See Also:

Constant Field Values

DEFAULT_NAMING_SERVICE

public static final int DEFAULT_NAMING_SERVICE

See Also:

Constant Field Values

DEFAULT_CONTEXT_FACTORY

public static final java.lang.String DEFAULT_CONTEXT_FACTORY

Default JNDI properties for remote access

See Also:

Constant Field Values

DEFAULT_DEDICATED_CONNECTION_KEY

public static final java.lang.String DEFAULT_DEDICATED_CONNECTION_KEY

See Also:

Constant Field Values

DEFAULT_DEDICATED_CONNECTION_VALUE

public static final java.lang.String DEFAULT_DEDICATED_CONNECTION_VALUE

See Also:

Constant Field Values

DEFAULT_USER_NAME

public static final java.lang.String DEFAULT_USER_NAME

See Also:

Constant Field Values

Constructor Detail

TransportManager

public TransportManager()

Method Detail

createConnection

public abstract org.eclipse.persistence.internal.sessions.coordination.RemoteConnection createConnection(ServiceId serviceId)

INTERNAL: Return a remote connection to the specified service

createConnections

public void createConnections()

INTERNAL: Does nothing by default. In case TransportManager doesn't use DiscoveryManager (createDiscoveryManager method retuns null) this method called during RCM initialization to create all the necessary connections. TransportManager ancestors that override createDiscoveryManager method to return null must override this method, too.

connectBackToRemote

public void connectBackToRemote(org.eclipse.persistence.internal.sessions.coordination.RemoteConnection connection)
                         throws java.lang.Exception

INTERNAL: This method is called by the remote command manager when this service should connect back ('handshake') to the service from which this remote connection came.

Throws:

java.lang.Exception

getConnectionToLocalHost

public org.eclipse.persistence.internal.sessions.coordination.RemoteConnection getConnectionToLocalHost()

INTERNAL: Return a remote connection to this service

createLocalConnection

public abstract void createLocalConnection()

INTERNAL: Put the remote connection to local host in naming service and return the of the created remote connection

getNamingServiceType

public int getNamingServiceType()

PUBLIC: Return the type of naming service used to look up remote connections to other service instances.

Returns:

The type of naming service used.

setNamingServiceType

public void setNamingServiceType(int serviceType)

ADVANCED: Set the type of naming service used to look up remote connections to other service instances. The service type must be one of JNDI_NAMING_SERVICE or REGISTRY_NAMING_SERVICE.

getUserName

public java.lang.String getUserName()

PUBLIC: Return the user name used as the value to the SECURITY_PRINCIPAL key in the cached context properties.

setUserName

public void setUserName(java.lang.String userName)

ADVANCED: Set the user name used as the value to the SECURITY_PRINCIPAL key in the cached context properties.

getPassword

public java.lang.String getPassword()

PUBLIC: Return the password used as the value to the SECURITY_CREDENTIALS key in the cached context properties.

getEncryptedPassword

public java.lang.String getEncryptedPassword()

PUBLIC: Return the encrypted (assumed) password used as the value to the SECURITY_CREDENTIALS key in the cached context properties.

setPassword

public void setPassword(java.lang.String password)

ADVANCED: Set the password used as the value to the SECURITY_CREDENTIALS key in the cached context properties.

setEncryptedPassword

public void setEncryptedPassword(java.lang.String encryptedPassword)

ADVANCED: Set the encrypted password used as the value to the SECURITY_CREDENTIALS key in the cached context properties.

getInitialContextFactoryName

public java.lang.String getInitialContextFactoryName()

PUBLIC: Return the context factory name used as the value to the INITIAL_CONTEXT_FACTORY key in the cached context properties.

setInitialContextFactoryName

public void setInitialContextFactoryName(java.lang.String contextFactoryName)

ADVANCED: Set the context factory name used as the value to the INITIAL_CONTEXT_FACTORY key in the cached context properties.

getContext

public javax.naming.Context getContext(java.util.Hashtable contextProperties)

INTERNAL: Helper method to get a naming context.

getRemoteContextProperties

public java.util.Hashtable getRemoteContextProperties()

ADVANCED: Return the cached properties that will be used to create the initial context when doing remote JNDI lookups.

setRemoteContextProperties

public void setRemoteContextProperties(java.util.Hashtable properties)

ADVANCED: Set the cached properties that will be used to create the initial context when doing remote JNDI lookups.

getLocalContextProperties

public java.util.Hashtable getLocalContextProperties()

ADVANCED: Return the properties that will be used to create the initial context for local JNDI access.

setLocalContextProperties

public void setLocalContextProperties(java.util.Hashtable properties)

ADVANCED: Set the properties that will be used to create the initial context for local JNDI access.

getRemoteCommandManager

public RemoteCommandManager getRemoteCommandManager()

INTERNAL:

addConnectionToExternalService

public void addConnectionToExternalService(org.eclipse.persistence.internal.sessions.coordination.RemoteConnection connection)

INTERNAL: Add a remote Connection to a remote service.

removeConnectionToExternalService

public void removeConnectionToExternalService(org.eclipse.persistence.internal.sessions.coordination.RemoteConnection connection)

INTERNAL: Remove a remote connection from the list of connections to receive remote commands.

removeAllConnectionsToExternalServices

public void removeAllConnectionsToExternalServices()

INTERNAL: Remove all remote connections from the list.

getConnectionsToExternalServices

public java.util.Hashtable getConnectionsToExternalServices()

INTERNAL:

getConnectionsToExternalServicesForCommandPropagation

public java.util.Hashtable getConnectionsToExternalServicesForCommandPropagation()

INTERNAL: Returns clone of the original map.

setShouldRemoveConnectionOnError

public void setShouldRemoveConnectionOnError(boolean shouldRemoveConnectionOnError)

PUBLIC: Set whether connections to remote services should be disconnected when an error occurs.

shouldRemoveConnectionOnError

public boolean shouldRemoveConnectionOnError()

PUBLIC: Return whether connections to remote services should be disconnected when an error occurs.

setEncryptionClassName

public void setEncryptionClassName(java.lang.String encryptionClassName)

INTERNAL SECURITY: Set encryption class that will be loaded by the SecurableObjectHolder

hasPassword

protected boolean hasPassword()

INTERNAL:

Returns:

true if a non null password has been set.

initialize

public void initialize()

INTERNAL: Initialize default properties.

encrypt

protected java.lang.String encrypt(java.lang.String pwd)

INTERNAL: Security method.

decrypt

protected java.lang.String decrypt(java.lang.String encryptedPwd)

INTERNAL: Security method called by the children classes

getRemoteHostContext

public javax.naming.Context getRemoteHostContext(java.lang.String remoteHostURL)

INTERNAL: Return the context used for looking up in the JNDI space of the specified remote URL.

createDiscoveryManager

public DiscoveryManager createDiscoveryManager()

ADVANCED: Factory of new DiscoveryManager for different transports. The RemoteCommandManger uses this method to create its DicscoveryManager. Sub-class of TransportManager should return special discovery if required. The default is discovery type is DiscoveryManager; If this method returns null then during initialization RemoteCommandManager calls createConnections method.

discardConnections

public void discardConnections()

INTERNAL: Remove all remote connections for its list and the local connection from JNDI or JMS Subsriber

removeLocalConnection

public abstract void removeLocalConnection()

ADVANCED: Remove the local connection from remote accesses. The implementation should set remove the local connection from JNDI or JMS and set it to null. This method is invoked internally by TopLink when the RCM is shutdown and should not be invoked by user's application.