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Optimizations and potentially fixing a ConcurrentModificationException involving the TransientEntityTracker

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Fixes #4368
This commit is contained in:
nossr50
2021-01-01 14:04:36 -08:00
parent 959d1e4a05
commit fbecbc167a
6 changed files with 144 additions and 49 deletions
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142
src/main/java/com/gmail/nossr50/util/TransientEntityTracker.java
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@ -19,6 +19,7 @@ import org.jetbrains.annotations.Nullable;
import java.util.*;
public class TransientEntityTracker {
//These two are updated in step with each other
private final @NotNull HashMap<UUID, HashMap<CallOfTheWildType, HashSet<TrackedTamingEntity>>> perPlayerTransientEntityMap;
private final @NotNull HashSet<LivingEntity> chunkLookupCache;
@ -27,30 +28,74 @@ public class TransientEntityTracker {
chunkLookupCache = new HashSet<>();
}
public void initPlayer(@NotNull UUID playerUUID) {
if (!isPlayerRegistered(playerUUID)) {
registerPlayer(playerUUID);
public synchronized @NotNull HashSet<LivingEntity> getChunkLookupCache() {
return chunkLookupCache;
}
public synchronized @NotNull HashMap<UUID, HashMap<CallOfTheWildType, HashSet<TrackedTamingEntity>>> getPerPlayerTransientEntityMap() {
return perPlayerTransientEntityMap;
}
public synchronized void initPlayer(@NotNull Player player) {
if (!isPlayerRegistered(player.getUniqueId())) {
registerPlayer(player.getUniqueId());
}
}
public void cleanupPlayer(@NotNull UUID playerUUID) {
cleanupAllSummons(null, playerUUID);
/**
* Removes a player from the tracker
*
* @param playerUUID target player
*/
public synchronized void cleanupPlayer(@NotNull UUID playerUUID) {
cleanPlayer(null, playerUUID);
}
public void cleanupPlayer(@NotNull Player player) {
//First remove all entities related to this player
/**
* Removes a player from the tracker
*
* @param player target player
*/
public synchronized void cleanupPlayer(@NotNull Player player) {
cleanPlayer(player, player.getUniqueId());
}
/**
* Removes a player from the tracker
*
* @param player target player
* @param playerUUID target player UUID
*/
private void cleanPlayer(@Nullable Player player, @NotNull UUID playerUUID) {
cleanupAllSummons(player, player.getUniqueId());
removePlayerFromMap(playerUUID);
}
private boolean isPlayerRegistered(@NotNull UUID playerUUID) {
return perPlayerTransientEntityMap.get(playerUUID) != null;
private void removePlayerFromMap(@NotNull UUID playerUUID) {
getPerPlayerTransientEntityMap().remove(playerUUID);
}
private void registerPlayer(@NotNull UUID playerUUID) {
perPlayerTransientEntityMap.put(playerUUID, new HashMap<CallOfTheWildType, HashSet<TrackedTamingEntity>>());
/**
* Checks if a player has already been registered
* Being registered constitutes having necessary values initialized in our per-player map
*
* @param playerUUID target player
* @return true if the player is registered
*/
private synchronized boolean isPlayerRegistered(@NotNull UUID playerUUID) {
return getPerPlayerTransientEntityMap().get(playerUUID) != null;
}
/**
* Register a player to our tracker, which initializes the necessary values in our per-player map
*
* @param playerUUID player to register
*/
private synchronized void registerPlayer(@NotNull UUID playerUUID) {
getPerPlayerTransientEntityMap().put(playerUUID, new HashMap<CallOfTheWildType, HashSet<TrackedTamingEntity>>());
for(CallOfTheWildType callOfTheWildType : CallOfTheWildType.values()) {
perPlayerTransientEntityMap.get(playerUUID).put(callOfTheWildType, new HashSet<>());
getPerPlayerTransientEntityMap().get(playerUUID).put(callOfTheWildType, new HashSet<>());
}
}
@ -60,16 +105,18 @@ public class TransientEntityTracker {
* @param playerUUID the target uuid of the player
* @return the tracked entities map for the player, null if the player isn't registered
*/
public @Nullable HashMap<CallOfTheWildType, HashSet<TrackedTamingEntity>> getPlayerTrackedEntityMap(@NotNull UUID playerUUID) {
return perPlayerTransientEntityMap.get(playerUUID);
public synchronized @Nullable HashMap<CallOfTheWildType, HashSet<TrackedTamingEntity>> getPlayerTrackedEntityMap(@NotNull UUID playerUUID) {
return getPerPlayerTransientEntityMap().get(playerUUID);
}
public void registerEntity(@NotNull UUID playerUUID, @NotNull TrackedTamingEntity trackedTamingEntity) {
if(!isPlayerRegistered(playerUUID)) {
mcMMO.p.getLogger().severe("Attempting to register entity to a player which hasn't been initialized!");
initPlayer(playerUUID);
}
/**
* Registers an entity to a player
* This includes registration to our per-player map and our chunk lookup cache
*
* @param playerUUID target player's UUID
* @param trackedTamingEntity target entity
*/
public synchronized void registerEntity(@NotNull UUID playerUUID, @NotNull TrackedTamingEntity trackedTamingEntity) {
//Add to map entry
getTrackedEntities(playerUUID, trackedTamingEntity.getCallOfTheWildType()).add(trackedTamingEntity);
@ -85,7 +132,7 @@ public class TransientEntityTracker {
* @param callOfTheWildType target type
* @return the set of tracked entities for the player, null if the player isn't registered, the set can be empty
*/
private @Nullable HashSet<TrackedTamingEntity> getTrackedEntities(@NotNull UUID playerUUID, @NotNull CallOfTheWildType callOfTheWildType) {
private synchronized @Nullable HashSet<TrackedTamingEntity> getTrackedEntities(@NotNull UUID playerUUID, @NotNull CallOfTheWildType callOfTheWildType) {
HashMap<CallOfTheWildType, HashSet<TrackedTamingEntity>> playerEntityMap = getPlayerTrackedEntityMap(playerUUID);
if(playerEntityMap == null)
@ -94,21 +141,45 @@ public class TransientEntityTracker {
return playerEntityMap.get(callOfTheWildType);
}
private void addToChunkLookupCache(@NotNull TrackedTamingEntity trackedTamingEntity) {
chunkLookupCache.add(trackedTamingEntity.getLivingEntity());
/**
* Adds an entity to our chunk lookup cache
*
* @param trackedTamingEntity target tracked taming entity
*/
private synchronized void addToChunkLookupCache(@NotNull TrackedTamingEntity trackedTamingEntity) {
getChunkLookupCache().add(trackedTamingEntity.getLivingEntity());
}
public void unregisterEntity(@NotNull LivingEntity livingEntity) {
/**
* Removes an entity from our tracker
* This includes removal from our per-player map and our chunk lookup cache
*
* @param livingEntity target entity
*/
private void unregisterEntity(@NotNull LivingEntity livingEntity) {
chunkLookupCacheCleanup(livingEntity);
perPlayerTransientMapCleanup(livingEntity);
}
/**
* Removes an entity from our chunk lookup cache
*
* @param livingEntity target entity
*/
private void chunkLookupCacheCleanup(@NotNull LivingEntity livingEntity) {
chunkLookupCache.remove(livingEntity);
getChunkLookupCache().remove(livingEntity);
}
/**
* Clean a living entity from our tracker
* Iterates over all players and their registered entities
* Doesn't do any kind of failure checking, if it doesn't find any player with a registered entity nothing bad happens or is reported
* However it should never happen like that, so maybe we could consider adding some failure to execute checking in the future
*
* @param livingEntity
*/
private void perPlayerTransientMapCleanup(@NotNull LivingEntity livingEntity) {
for(UUID uuid : perPlayerTransientEntityMap.keySet()) {
for(UUID uuid : getPerPlayerTransientEntityMap().keySet()) {
for(CallOfTheWildType callOfTheWildType : CallOfTheWildType.values()) {
HashSet<TrackedTamingEntity> trackedEntities = getTrackedEntities(uuid, callOfTheWildType);
@ -127,10 +198,16 @@ public class TransientEntityTracker {
}
}
public @NotNull List<LivingEntity> getAllTransientEntitiesInChunk(@NotNull Chunk chunk) {
/**
* Get all transient entities that exist in a specific chunk
*
* @param chunk the chunk to match
* @return a list of transient entities that are located in the provided chunk
*/
public synchronized @NotNull List<LivingEntity> getAllTransientEntitiesInChunk(@NotNull Chunk chunk) {
ArrayList<LivingEntity> matchingEntities = new ArrayList<>();
for(LivingEntity livingEntity : chunkLookupCache) {
for(LivingEntity livingEntity : getChunkLookupCache()) {
if(livingEntity.getLocation().getChunk().equals(chunk)) {
matchingEntities.add(livingEntity);
}
@ -139,17 +216,14 @@ public class TransientEntityTracker {
return matchingEntities;
}
/*
* Gross code below
*/
/**
* Get the amount of a summon currently active for a player
*
* @param playerUUID target player
* @param callOfTheWildType summon type
* @return the amount of summons currently active for player of target type
*/
public int getAmountCurrentlySummoned(@NotNull UUID playerUUID, @NotNull CallOfTheWildType callOfTheWildType) {
public synchronized int getAmountCurrentlySummoned(@NotNull UUID playerUUID, @NotNull CallOfTheWildType callOfTheWildType) {
HashSet<TrackedTamingEntity> trackedEntities = getTrackedEntities(playerUUID, callOfTheWildType);
if(trackedEntities == null)
@ -165,7 +239,7 @@ public class TransientEntityTracker {
* @param livingEntity entity to remove
* @param player associated player
*/
public void removeSummon(@NotNull LivingEntity livingEntity, @Nullable Player player, boolean timeExpired) {
public synchronized void removeSummon(@NotNull LivingEntity livingEntity, @Nullable Player player, boolean timeExpired) {
//Kill the summon & remove it
if(livingEntity.isValid()) {
livingEntity.setHealth(0); //Should trigger entity death events