Package com.sun.jini.reggie

Class ConstrainableEventLease

java.lang.Object
com.sun.jini.lease.AbstractLease
com.sun.jini.reggie.EventLease
com.sun.jini.reggie.ConstrainableEventLease
All Implemented Interfaces:
Serializable, RemoteMethodControl, Lease, ReferentUuid
public final class ConstrainableEventLease extends EventLease implements RemoteMethodControl
EventLease subclass that supports constraints.
Author:
Sun Microsystems, Inc.
See Also:

  • Method Details

    • createLeaseMap

      public LeaseMap createLeaseMap(long duration)
      Creates a constraint-aware lease map.
      Specified by:
      createLeaseMap in interface Lease
      Parameters:
      duration - the duration to put into a Long and use as the value for the current lease in the created LeaseMap
      Returns:
      the created LeaseMap object

    • canBatch

      public boolean canBatch(Lease lease)
      Two leases can be batched if they are both RegistrarLeases, share the same server, and have compatible constraints.
      Specified by:
      canBatch in interface Lease
      Parameters:
      lease - the Lease to be evaluated
      Returns:
      a boolean indicating whether or not the lease given as a parameter can be batched (placed in the same LeaseMap) with the current lease

    • 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:

    • 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:

    • getReferentUuid

      public Uuid getReferentUuid()
      Returns the lease Uuid.
      Specified by:
      getReferentUuid in interface ReferentUuid
      Returns:
      the Uuid associated with the resource this proxy represents. Will not return null.

    • hashCode

      public int hashCode()
      Returns the lease Uuid's hash code.
      Overrides:
      hashCode in class Object

    • equals

      public boolean equals(Object obj)
      Returns true if lease Uuids match, false otherwise.
      Overrides:
      equals in class Object

    • toString

      public String toString()
      Returns a string created from the proxy class name, the registrar's service ID, the id of the lessee or event (depending on the subclass), and the result of the underlying server proxy's toString method.
      Overrides:
      toString in class Object
      Returns:
      String