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Factored scene movement out into separate helper classes so that code can be a

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bit more cleanly shared and the process of resolving zones and scenes and the
various fiddling done during a scene move can be more easily grokked.


git-svn-id: svn+ssh://src.earth.threerings.net/vilya/trunk@363 c613c5cb-e716-0410-b11b-feb51c14d237
This commit is contained in:
Michael Bayne
2007-07-17 00:25:18 +00:00
parent 755b835c93
commit cb05d5f56b
8 changed files with 404 additions and 325 deletions
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src/java/com/threerings/whirled/zone/server/ZoneProvider.java
+29 -163
View File
@@ -44,20 +44,17 @@ import com.threerings.whirled.zone.data.ZoneSummary;
import com.threerings.whirled.zone.data.ZonedBodyObject;
/**
* Provides zone related services which are presently the ability to move
* from zone to zone.
* Provides zone related services which are presently the ability to move from zone to zone.
*/
public class ZoneProvider
implements ZoneCodes, InvocationProvider
{
/**
* Constructs a zone provider that will interoperate with the supplied
* zone and scene registries. The zone provider will automatically be
* constructed and registered by the {@link ZoneRegistry}, which a
* zone-using system must create and initialize in their server.
* Constructs a zone provider that will interoperate with the supplied zone and scene
* registries. The zone provider will automatically be constructed and registered by the {@link
* ZoneRegistry}, which a zone-using system must create and initialize in their server.
*/
public ZoneProvider (LocationProvider locprov, ZoneRegistry zonereg,
SceneRegistry screg)
public ZoneProvider (LocationProvider locprov, ZoneRegistry zonereg, SceneRegistry screg)
{
_locprov = locprov;
_zonereg = zonereg;
@@ -70,31 +67,25 @@ public class ZoneProvider
* @param caller the user requesting the move.
* @param zoneId the qualified zone id of the new zone.
* @param sceneId the identifier of the new scene.
* @param sceneVer the version of the scene model currently held by
* the client.
* @param sceneVer the version of the scene model currently held by the client.
* @param listener the entity to inform of success or failure.
*/
public void moveTo (ClientObject caller, int zoneId, int sceneId,
int sceneVer, ZoneMoveListener listener)
throws InvocationException
{
// avoid cluttering up the method declaration with final keywords
final BodyObject fsource = (BodyObject)caller;
final int fsceneId = sceneId;
final int fsceneVer = sceneVer;
final ZoneMoveListener flistener = listener;
// look up the caller's current zone id and make sure it is happy
// about their departure from the current zone
if (!(caller instanceof ZonedBodyObject)) {
Log.warning("Request to switch zones by non-ZonedBodyObject!? " +
Log.warning("Request to switch zones by non-ZonedBodyObject " +
"[clobj=" + caller.getClass() + "].");
throw new InvocationException(INTERNAL_ERROR);
}
ZonedBodyObject zcaller = (ZonedBodyObject)caller;
ZoneManager ozmgr = _zonereg.getZoneManager(zcaller.getZoneId());
// look up the caller's current zone id and make sure it is happy about their departure
// from the current zone
BodyObject body = (BodyObject)caller;
ZoneManager ozmgr = _zonereg.getZoneManager(((ZonedBodyObject)caller).getZoneId());
if (ozmgr != null) {
String msg = ozmgr.ratifyBodyExit(fsource);
String msg = ozmgr.ratifyBodyExit(body);
if (msg != null) {
throw new InvocationException(msg);
}
@@ -103,146 +94,23 @@ public class ZoneProvider
// look up the zone manager for the zone
ZoneManager zmgr = _zonereg.getZoneManager(zoneId);
if (zmgr == null) {
Log.warning("Requested to enter a zone for which we have no " +
"manager [user=" + fsource.who() +
", zoneId=" + zoneId + "].");
Log.warning("Requested to enter a zone for which we have no manager " +
"[user=" + body.who() + ", zoneId=" + zoneId + "].");
throw new InvocationException(NO_SUCH_ZONE);
}
// resolve the zone!
ZoneManager.ResolutionListener zl = new ZoneManager.ResolutionListener()
{
public void zoneWasResolved (ZoneSummary summary) {
continueMoveTo(
fsource, summary, fsceneId, fsceneVer, flistener);
}
public void zoneFailedToResolve (int zoneId, Exception reason) {
Log.warning("Unable to resolve zone [zoneId=" + zoneId +
", reason=" + reason + "].");
flistener.requestFailed(NO_SUCH_ZONE);
}
};
zmgr.resolveZone(zoneId, zl);
// resolve the zone and move the user
zmgr.resolveZone(zoneId, new ZoneMoveHandler(
zmgr, (BodyObject)caller, sceneId, sceneVer, listener));
}
/**
* This is called after we have resolved our zone.
*/
protected void continueMoveTo (
BodyObject source, ZoneSummary summary, int sceneId, int sceneVer,
ZoneMoveListener listener)
{
// avoid cluttering up the method declaration with final keywords
final BodyObject fsource = source;
final ZoneSummary fsum = summary;
final int fsceneVer = sceneVer;
final ZoneMoveListener flistener = listener;
// give the zone manager a chance to veto the request
ZoneManager zmgr = _zonereg.getZoneManager(summary.zoneId);
String errmsg = zmgr.ratifyBodyEntry(source, summary.zoneId);
if (errmsg != null) {
listener.requestFailed(errmsg);
return;
}
// create a callback object that will handle the resolution or
// failed resolution of the scene
SceneRegistry.ResolutionListener rl = null;
rl = new SceneRegistry.ResolutionListener() {
public void sceneWasResolved (SceneManager scmgr) {
// make sure our caller is still around; under heavy load,
// clients might end their session while the scene is
// resolving
if (!fsource.isActive()) {
Log.info("Abandoning zone move, client gone " +
"[who=" + fsource.who() +
", dest=" + scmgr.where() + "].");
// No one to respond to, just mark that we're okay with it.
InvocationMarshaller.setNoResponse(flistener);
return;
}
finishMoveTo(fsource, fsum, scmgr, fsceneVer, flistener);
}
public void sceneFailedToResolve (int sceneId, Exception reason) {
Log.warning("Unable to resolve scene [sceneid=" + sceneId +
", reason=" + reason + "].");
// pretend like the scene doesn't exist to the client
flistener.requestFailed(NO_SUCH_PLACE);
}
};
// make sure the scene they are headed to is actually loaded into
// the server
_screg.resolveScene(sceneId, rl);
}
/**
* This is called after the scene to which we are moving is guaranteed
* to have been loaded into the server.
*/
protected void finishMoveTo (
BodyObject source, ZoneSummary summary, SceneManager scmgr,
int sceneVersion, ZoneMoveListener listener)
{
// move to the place object associated with this scene
PlaceObject plobj = scmgr.getPlaceObject();
int ploid = plobj.getOid();
try {
// try doing the actual move
PlaceConfig config = _locprov.moveTo(source, ploid);
// now that we've finally moved, we can update the user object
// with the new scene and zone ids
source.startTransaction();
try {
((ScenedBodyObject)source).setSceneId(scmgr.getScene().getId());
((ZonedBodyObject)source).setZoneId(summary.zoneId);
} finally {
source.commitTransaction();
}
// check to see if they need a newer version of the scene data
SceneModel model = scmgr.getScene().getSceneModel();
if (sceneVersion < model.version) {
SceneUpdate[] updates = scmgr.getUpdates(sceneVersion);
if (updates != null) {
listener.moveSucceededWithUpdates(
ploid, config, summary, updates);
} else {
listener.moveSucceededWithScene(
ploid, config, summary, model);
}
} else {
// then send the moveTo response
listener.moveSucceeded(ploid, config, summary);
}
// let the zone manager know that someone just came on in
ZoneManager zmgr = _zonereg.getZoneManager(summary.zoneId);
zmgr.bodyDidEnterZone(source, summary.zoneId);
} catch (InvocationException ie) {
listener.requestFailed(ie.getMessage());
} catch (RuntimeException re) {
Log.logStackTrace(re);
listener.requestFailed(INTERNAL_ERROR);
}
}
/**
* Ejects the specified body from their current scene and sends them a
* request to move to the specified new zone and scene. This is the
* zone-equivalent to {@link LocationProvider#moveBody}.
* Ejects the specified body from their current scene and sends them a request to move to the
* specified new zone and scene. This is the zone-equivalent to {@link
* LocationProvider#moveBody}.
*
* @return null if the user was forcibly moved, or a string indicating
* the reason for denial of departure of their current zone (from
* {@link ZoneManager#ratifyBodyExit}).
* @return null if the user was forcibly moved, or a string indicating the reason for denial of
* departure of their current zone (from {@link ZoneManager#ratifyBodyExit}).
*/
public String moveBody (ZonedBodyObject source, int zoneId, int sceneId)
{
@@ -264,18 +132,16 @@ public class ZoneProvider
}
/**
* Ejects the specified body from their current scene and zone. This
* is the zone equivalent to {@link
* LocationProvider#leaveOccupiedPlace}.
* Ejects the specified body from their current scene and zone. This is the zone equivalent to
* {@link LocationProvider#leaveOccupiedPlace}.
*
* @return null if the user was forcibly moved, or a string indicating
* the reason for denial of departure of their current zone (from
* {@link ZoneManager#ratifyBodyExit}).
* @return null if the user was forcibly moved, or a string indicating the reason for denial of
* departure of their current zone (from {@link ZoneManager#ratifyBodyExit}).
*/
public String leaveOccupiedZone (ZonedBodyObject source)
{
// look up the caller's current zone id and make sure it is happy
// about their departure from the current zone
// look up the caller's current zone id and make sure it is happy about their departure
// from the current zone
ZoneManager zmgr = _zonereg.getZoneManager(source.getZoneId());
String msg;
if (zmgr != null &&