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133 lines
3.9 KiB
Java
133 lines
3.9 KiB
Java
// MCAST.java
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package protocol; // protocol package
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import java.util.*; // import Java utility classes
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import support.*; // import Jasper support classes
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/**
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This is the main class for simulation of multicasting. It handles broadcast,
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unicast and multicast.
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@author Kenneth J. Turner
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@version 1.0 (22nd July 2010, KJT): initial version
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*/
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public class MCAST extends Protocol {
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/** Broadcast service mode */
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public final static int BROADCAST = 0;
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/** Multiple unicast service mode */
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public final static int UNICAST = 1;
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/** Multicast service mode */
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public final static int MULTICAST = 2;
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/** Service entities */
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private static Vector<ProtocolEntity> serviceEntities;
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/** Service mode */
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public static int serviceMode = BROADCAST;
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/** Source */
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private MCASTSource source;
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/** Router A */
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private MCASTRouter userA;
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/** Router B */
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private MCASTRouter userB;
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/** Router C */
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private MCASTRouter userC;
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/** Router D */
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private MCASTRouter userD;
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/** Router E */
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private MCASTRouter userE;
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/** Router F */
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private MCASTRouter userF;
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/**
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Constructor for an MCAST object.
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*/
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public MCAST() {
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source = new MCASTSource("Source"); // create source
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userA = new MCASTRouter("Router A"); // create router A
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userB = new MCASTRouter("Router B"); // create router B
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userC = new MCASTRouter("Router C"); // create router C
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userD = new MCASTRouter("Router D"); // create router D
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userE = new MCASTRouter("Router E"); // create router E
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userF = new MCASTRouter("Router F"); // create router F
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serviceEntities = new Vector<ProtocolEntity>();
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serviceEntities.addElement(source); // add source
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serviceEntities.addElement(userA); // add router A
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serviceEntities.addElement(userB); // add router B
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serviceEntities.addElement(userC); // add router C
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serviceEntities.addElement(userD); // add router D
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serviceEntities.addElement(userE); // add router E
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serviceEntities.addElement(userF); // add router F
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entities = serviceEntities; // store entities for protocol
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}
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/**
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Return a protocol event with the given comment.
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@param entity protocol entity
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@param comment protocol comment
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@return protocol event
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*/
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public static ProtocolEvent comment(ProtocolEntity entity, String comment) {
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return(new ProtocolEvent(ProtocolEvent.COMMENT, entity, comment));
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}
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/**
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Get an entity by letter.
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@param entityLetter entity letter ('A', etc.)
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@return protocol entity
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*/
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public static ProtocolEntity getEntity(char entityLetter) {
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int index = entityLetter - 'A' + 1;
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return(serviceEntities.get(index)); // return entity for index
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}
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/**
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Get an entity's SDUs.
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@param entityLetter entity router letter ('A', etc.)
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@return SDU held by router
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*/
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public static Vector<MCASTSdu> getSDUs(char entityLetter) {
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ProtocolEntity entity = // get entity for letter
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getEntity(entityLetter);
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return(((MCASTRouter) entity).getSDUs()); // return SDUs
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}
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/**
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Set a parameter of the MCAST simulation.
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@param parameter parameter name (broadcast, multicast, unicast)
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@param value parameter value
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*/
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public void setParameter(String parameter, String value) {
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if (parameter.equals("serviceMode")) { // service count?
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if (value.equalsIgnoreCase("broadcast")) // broadcast?
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serviceMode = BROADCAST; // note as broadcast
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else if (value.equalsIgnoreCase("multicast")) // multicast?
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serviceMode = MULTICAST; // note as multicast
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else if (value.equalsIgnoreCase("unicast")) // unicast?
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serviceMode = UNICAST; // note as unicast
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else // not broad/multi/unicast
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System.err.println( // report error
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"MUX.setParameter: invalid service mode '" + value + "'");
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}
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}
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}
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