org.apache.river.outrigger

Class ConstrainableParticipantProxy

java.lang.Object

org.apache.river.outrigger.ParticipantProxy

org.apache.river.outrigger.ConstrainableParticipantProxy

All Implemented Interfaces:

Serializable, Remote, RemoteMethodControl, TransactionConstants, TransactionParticipant, ReferentUuid

final class ConstrainableParticipantProxy
extends ParticipantProxy
implements RemoteMethodControl

Subclass of ParticipantProxy that implements RemoteMethodControl

Author:

Sun Microsystems, Inc.

Field Summary

Fields

Modifier and Type	Field and Description
private static long	serialVersionUID

Fields inherited from class org.apache.river.outrigger.ParticipantProxy

space, spaceUuid

Fields inherited from interface net.jini.core.transaction.server.TransactionConstants

ABORTED, ACTIVE, COMMITTED, NOTCHANGED, PREPARED, VOTING

Constructor Summary

Constructors

Constructor and Description
ConstrainableParticipantProxy(TransactionParticipant space, Uuid spaceUuid, MethodConstraints methodConstraints) Create a new ConstrainableParticipantProxy for the given space.

Method Summary

Modifier and Type	Method and Description
private static TransactionParticipant	constrainServer(TransactionParticipant participant, MethodConstraints methodConstraints) Returns a copy of the server proxy with the specified client constraints and methods mapping.
MethodConstraints	getConstraints() Returns the client constraints placed on this proxy.
private ProxyTrustIterator	getProxyTrustIterator() Returns a proxy trust iterator that is used in ProxyTrustVerifier to retrieve this object's trust verifier.
private void	readObject(ObjectInputStream s)
RemoteMethodControl	setConstraints(MethodConstraints constraints) Returns a new copy of this proxy with the client constraints set to the specified constraints.

Methods inherited from class org.apache.river.outrigger.ParticipantProxy

abort, commit, equals, getReferentUuid, hashCode, prepare, prepareAndCommit, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

Constructor Detail

ConstrainableParticipantProxy

ConstrainableParticipantProxy(TransactionParticipant space,
                              Uuid spaceUuid,
                              MethodConstraints methodConstraints)

Create a new ConstrainableParticipantProxy for the given space.

Parameters:

space - The an inner proxy that implements TransactionParticipant for the space.

spaceUuid - The universally unique ID for the space

Throws:

NullPointerException - if space or spaceUuid is null.

Method Detail

constrainServer

private static TransactionParticipant constrainServer(TransactionParticipant participant,
                                                      MethodConstraints methodConstraints)

Returns a copy of the server proxy with the specified client constraints and methods mapping.

setConstraints

public RemoteMethodControl setConstraints(MethodConstraints constraints)

Description copied from interface: RemoteMethodControl

Returns a new copy of this proxy with the client constraints set to the specified constraints. These constraints completely replace (in the copy) any client constraints previously placed on this proxy; calling the getConstraints method of the copy returns the identical constraints instance. The original proxy is not modified. A null value is interpreted as mapping all methods to empty constraints (one that has no requirements and no preferences). For any given remote call, the specific client requirements and preferences to be satisfied are given by the return value of invoking the getConstraints method of the specified MethodConstraints instance with a Method object representing the remote method.

Client constraints placed on a proxy are included in the serialized state of the proxy. This allows third-party services to be transparent to the client's needs. For example, if remote object s1 obtains a proxy for remote object s2, and passes that proxy to remote object s3, expecting s3 to invoke a remote method on s2, then s1 can control that call by placing its constraints directly on the proxy before passing it to s3. If s3 does not wish to be transparent in this way, then it should explicitly replace the client constraints on received proxies with whatever constraints are appropriate to implement its own policy.

Specified by:

setConstraints in interface RemoteMethodControl

Parameters:

constraints - client constraints, or null

Returns:

a new copy of this proxy with the client constraints set to the specified constraints

See Also:

RemoteMethodControl.getConstraints()

getConstraints

public MethodConstraints getConstraints()

Description copied from interface: RemoteMethodControl

Returns the client constraints placed on this proxy. The return value can be null, which is interpreted as mapping all methods to empty constraints (one that has no requirements and no preferences).

Specified by:

getConstraints in interface RemoteMethodControl

Returns:

the client constraints, or null

See Also:

RemoteMethodControl.setConstraints(net.jini.core.constraint.MethodConstraints)

getProxyTrustIterator

private ProxyTrustIterator getProxyTrustIterator()

Returns a proxy trust iterator that is used in ProxyTrustVerifier to retrieve this object's trust verifier.

readObject

private void readObject(ObjectInputStream s)
                 throws IOException,
                        ClassNotFoundException

Throws:

IOException

ClassNotFoundException