drcl.inet.contract
Class IDConfig

java.lang.Object
  |
  +--drcl.comp.Contract
        |
        +--drcl.inet.contract.IDConfig

public class IDConfig

extends Contract

The IdentityConfiguration contract. This contract defines three services at the reactor:

IdentityAddition

The initiator sends a message that consists of:

1. an integer of value 0 (the "add" command),
2. the set of identities (long[]) to be added, and
3. the set of corresponding life periods (double[]).

In response, the reactor adds the set of identities to its database and each identity will stay for the time specified in the corresponding period and then removed. One may specify a negative value or Double.NaN as the period value to have the corresponding identity not removed.

IdentityRemoval

The initiator sends a message that consists of:

1. an integer of value 1 (the "remove" command) and
2. the set of identities (long[]) to be removed.

In response, the reactor removes the set of identities from its database.

IdentityTimeoutQuery

The initiator sends a message that consists of:

1. an integer of value 2 (the "query" command) and
2. the set of identities (long[]) in question.

In response, the reactor sends back the set of time values (double[]), each of which corresponds to the time when the corresponding identity will be removed.

This class also provides a set of static methods to faciliate conducting the above services (add(..., Port), remove(..., Port) and query(..., Port)) from the specified port. These methods are particularly useful in implementing a protocol that is in charge of maintaining the identities of the node.

Version:

1.0, 10/17/2000

Author:

Hung-ying Tyan

Inner Class Summary

static class

IDConfig.Message

Field Summary

static int	ADD
static IDConfig	INSTANCE
static int	QUERY
static int	REMOVE

Fields inherited from class drcl.comp.Contract

Role_INITIATOR, Role_PEER, Role_REACTOR

Constructor Summary

IDConfig()

IDConfig(int role_)

Method Summary

static void	add(long[] id_, double[] timeout_, Port out_)
static void	add(long id_, double timeout_, Port out_)
static java.lang.Object	createAddRequest(long id_)
static java.lang.Object	createAddRequest(long[] id_, double[] timeout_)
static java.lang.Object	createAddRequest(long id_, double timeout_)
static java.lang.Object	createQueryRequest()
static java.lang.Object	createQueryRequest(long id_)
static java.lang.Object	createQueryRequest(long[] id_)
static java.lang.Object	createRemoveRequest(long id_)
static java.lang.Object	createRemoveRequest(long[] id_)
java.lang.Object	getContractContent() Returns the content of this contract (format?).
java.lang.String	getName()
static double[]	query(long[] id_, Port out_)
static double	query(long id_, Port out_)
static void	remove(long[] id_, Port out_)
static void	remove(long id_, Port out_)

Methods inherited from class drcl.comp.Contract

getRole, match, setRole

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final IDConfig INSTANCE

ADD

public static final int ADD

REMOVE

public static final int REMOVE

QUERY

public static final int QUERY

Constructor Detail

IDConfig

public IDConfig()

IDConfig

public IDConfig(int role_)

Method Detail

getName

public java.lang.String getName()

Overrides:

getName in class Contract

getContractContent

public java.lang.Object getContractContent()

Description copied from class: Contract

Returns the content of this contract (format?).

Overrides:

getContractContent in class Contract

add

public static void add(long id_,
                       double timeout_,
                       Port out_)

add

public static void add(long[] id_,
                       double[] timeout_,
                       Port out_)

remove

public static void remove(long id_,
                          Port out_)

remove

public static void remove(long[] id_,
                          Port out_)

query

public static double query(long id_,
                           Port out_)

query

public static double[] query(long[] id_,
                             Port out_)

createAddRequest

public static java.lang.Object createAddRequest(long id_)

createAddRequest

public static java.lang.Object createAddRequest(long id_,
                                                double timeout_)

createAddRequest

public static java.lang.Object createAddRequest(long[] id_,
                                                double[] timeout_)

createRemoveRequest

public static java.lang.Object createRemoveRequest(long id_)

createRemoveRequest

public static java.lang.Object createRemoveRequest(long[] id_)

createQueryRequest

public static java.lang.Object createQueryRequest()

createQueryRequest

public static java.lang.Object createQueryRequest(long id_)

createQueryRequest

public static java.lang.Object createQueryRequest(long[] id_)