Limework/RedisBungee
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Code Releases Activity

Remove internal cache because it's a mess

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This commit is contained in:
Tux 2016-02-26 23:17:24 -05:00
parent 3e3295b9f6
commit 546ee7566d
5 changed files with 31 additions and 230 deletions
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48
src/main/java/com/imaginarycode/minecraft/redisbungee/DataManager.java
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@ -1,5 +1,7 @@
package com.imaginarycode.minecraft.redisbungee;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import com.google.common.net.InetAddresses;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
@ -8,7 +10,6 @@ import com.imaginarycode.minecraft.redisbungee.events.PlayerChangedServerNetwork
import com.imaginarycode.minecraft.redisbungee.events.PlayerJoinedNetworkEvent;
import com.imaginarycode.minecraft.redisbungee.events.PlayerLeftNetworkEvent;
import com.imaginarycode.minecraft.redisbungee.events.PubSubMessageEvent;
import com.imaginarycode.minecraft.redisbungee.util.InternalCache;
import lombok.Getter;
import lombok.RequiredArgsConstructor;
import net.md_5.bungee.api.connection.ProxiedPlayer;
@ -19,6 +20,7 @@ import net.md_5.bungee.event.EventHandler;
import redis.clients.jedis.Jedis;
import java.net.InetAddress;
import java.util.Objects;
import java.util.UUID;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
@ -33,29 +35,20 @@ import java.util.logging.Level;
public class DataManager implements Listener {
private final RedisBungee plugin;
// TODO: Add cleanup for this.
private final InternalCache<UUID, String> serverCache = createCache();
private final InternalCache<UUID, String> proxyCache = createCache(TimeUnit.MINUTES.toMillis(60));
private final InternalCache<UUID, InetAddress> ipCache = createCache(TimeUnit.MINUTES.toMillis(60));
private final InternalCache<UUID, Long> lastOnlineCache = createCache(TimeUnit.MINUTES.toMillis(60));
private final Cache<UUID, String> serverCache = createCache();
private final Cache<UUID, String> proxyCache = createCache();
private final Cache<UUID, InetAddress> ipCache = createCache();
private final Cache<UUID, Long> lastOnlineCache = createCache();
public DataManager(RedisBungee plugin) {
this.plugin = plugin;
plugin.getProxy().getScheduler().schedule(plugin, new Runnable() {
@Override
public void run() {
proxyCache.cleanup();
ipCache.cleanup();
lastOnlineCache.cleanup();
}
}, 1, 1, TimeUnit.MINUTES);
}
private static <K, V> InternalCache<K, V> createCache() {
return new InternalCache<>();
}
private static <K, V> InternalCache<K, V> createCache(long entryWriteExpiry) {
return new InternalCache<>(entryWriteExpiry);
private static <K, V> Cache<K, V> createCache() {
return CacheBuilder.newBuilder()
.maximumSize(1000)
.expireAfterWrite(1, TimeUnit.HOURS)
.build();
}
private final JsonParser parser = new JsonParser();
@ -71,7 +64,7 @@ public class DataManager implements Listener {
@Override
public String call() throws Exception {
try (Jedis tmpRsc = plugin.getPool().getResource()) {
return tmpRsc.hget("player:" + uuid, "server");
return Objects.requireNonNull(tmpRsc.hget("player:" + uuid, "server"), "user not found");
}
}
});
@ -92,11 +85,13 @@ public class DataManager implements Listener {
@Override
public String call() throws Exception {
try (Jedis tmpRsc = plugin.getPool().getResource()) {
return tmpRsc.hget("player:" + uuid, "proxy");
return Objects.requireNonNull(tmpRsc.hget("player:" + uuid, "proxy"), "user not found");
}
}
});
} catch (ExecutionException e) {
if (e.getCause() instanceof NullPointerException && e.getCause().getMessage().equals("user not found"))
return null; // HACK
plugin.getLogger().log(Level.SEVERE, "Unable to get proxy", e);
throw new RuntimeException("Unable to get proxy for " + uuid, e);
}
@ -114,11 +109,15 @@ public class DataManager implements Listener {
public InetAddress call() throws Exception {
try (Jedis tmpRsc = plugin.getPool().getResource()) {
String result = tmpRsc.hget("player:" + uuid, "ip");
return result == null ? null : InetAddresses.forString(result);
if (result == null)
throw new NullPointerException("user not found");
return InetAddresses.forString(result);
}
}
});
} catch (ExecutionException e) {
if (e.getCause() instanceof NullPointerException && e.getCause().getMessage().equals("user not found"))
return null; // HACK
plugin.getLogger().log(Level.SEVERE, "Unable to get IP", e);
throw new RuntimeException("Unable to get IP for " + uuid, e);
}
@ -209,11 +208,11 @@ public class DataManager implements Listener {
case SERVER_CHANGE:
final DataManagerMessage<ServerChangePayload> message3 = RedisBungee.getGson().fromJson(jsonObject, new TypeToken<DataManagerMessage<ServerChangePayload>>() {
}.getType());
final String oldServer = serverCache.put(message3.getTarget(), message3.getPayload().getServer());
serverCache.put(message3.getTarget(), message3.getPayload().getServer());
plugin.getProxy().getScheduler().runAsync(plugin, new Runnable() {
@Override
public void run() {
plugin.getProxy().getPluginManager().callEvent(new PlayerChangedServerNetworkEvent(message3.getTarget(), oldServer, message3.getPayload().getServer()));
plugin.getProxy().getPluginManager().callEvent(new PlayerChangedServerNetworkEvent(message3.getTarget(), message3.getPayload().getOldServer(), message3.getPayload().getServer()));
}
});
break;
@ -245,6 +244,7 @@ public class DataManager implements Listener {
@RequiredArgsConstructor
static class ServerChangePayload {
private final String server;
private final String oldServer;
}
@Getter

6
src/main/java/com/imaginarycode/minecraft/redisbungee/RedisBungee.java
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@ -1,5 +1,7 @@
package com.imaginarycode.minecraft.redisbungee;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import com.google.common.collect.*;
import com.google.common.io.ByteStreams;
import com.google.gson.Gson;
@ -64,7 +66,9 @@ public final class RedisBungee extends Plugin {
private LuaManager.Script getServerPlayersScript;
private static final Object SERVER_TO_PLAYERS_KEY = new Object();
private final InternalCache<Object, Multimap<String, UUID>> serverToPlayersCache = new InternalCache<>(2000);
private final Cache<Object, Multimap<String, UUID>> serverToPlayersCache = CacheBuilder.newBuilder()
.expireAfterWrite(5, TimeUnit.SECONDS)
.build();
/**
* Fetch the {@link RedisBungeeAPI} object created on plugin start.

3
src/main/java/com/imaginarycode/minecraft/redisbungee/RedisBungeeListener.java
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@ -120,13 +120,14 @@ public class RedisBungeeListener implements Listener {
@EventHandler
public void onServerChange(final ServerConnectedEvent event) {
final String currentServer = event.getPlayer().getServer() == null ? null : event.getPlayer().getServer().getInfo().getName();
plugin.getProxy().getScheduler().runAsync(plugin, new RedisCallable<Void>(plugin) {
@Override
protected Void call(Jedis jedis) {
jedis.hset("player:" + event.getPlayer().getUniqueId().toString(), "server", event.getServer().getInfo().getName());
jedis.publish("redisbungee-data", RedisBungee.getGson().toJson(new DataManager.DataManagerMessage<>(
event.getPlayer().getUniqueId(), DataManager.DataManagerMessage.Action.SERVER_CHANGE,
new DataManager.ServerChangePayload(event.getServer().getInfo().getName()))));
new DataManager.ServerChangePayload(event.getServer().getInfo().getName(), currentServer))));
return null;
}
});

77
src/main/java/com/imaginarycode/minecraft/redisbungee/util/InternalCache.java
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@ -1,77 +0,0 @@
package com.imaginarycode.minecraft.redisbungee.util;
import lombok.Data;
import java.util.Iterator;
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ExecutionException;
// I would use the Guava cache, but can't because I need a few more properties.
public class InternalCache<K, V> {
private final ConcurrentMap<K, Holder> map = new ConcurrentHashMap<>(128, 0.75f, 4);
private final long entryWriteExpiry;
public InternalCache() {
this.entryWriteExpiry = 0;
}
public InternalCache(long entryWriteExpiry) {
this.entryWriteExpiry = entryWriteExpiry;
}
public V get(K key, Callable<V> loader) throws ExecutionException {
Holder value = map.get(key);
if (value == null || (entryWriteExpiry > 0 && System.currentTimeMillis() > value.expiry)) {
V freshValue;
try {
freshValue = loader.call();
} catch (Exception e) {
throw new ExecutionException(e);
}
if (freshValue == null)
return null;
map.putIfAbsent(key, value = new Holder(freshValue, System.currentTimeMillis() + entryWriteExpiry));
}
return value.value;
}
public V put(K key, V value) {
Holder holder = map.put(key, new Holder(value, System.currentTimeMillis() + entryWriteExpiry));
if (holder == null)
return null;
return holder.value;
}
public void invalidate(K key) {
map.remove(key);
}
// Run periodically to clean up the cache mappings.
public void cleanup() {
if (entryWriteExpiry <= 0)
return;
long fixedReference = System.currentTimeMillis();
for (Iterator<Map.Entry<K, Holder>> it = map.entrySet().iterator(); it.hasNext(); ) {
Map.Entry<K, Holder> entry = it.next();
if (entry.getValue().expiry <= fixedReference)
it.remove();
}
}
@Data
private class Holder {
private final V value;
private final long expiry;
}
}

127
src/test/java/com/imaginarycode/minecraft/redisbungee/test/InternalCacheTest.java
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@ -1,127 +0,0 @@
package com.imaginarycode.minecraft.redisbungee.test;
import com.imaginarycode.minecraft.redisbungee.util.InternalCache;
import org.junit.Assert;
import org.junit.Test;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
public class InternalCacheTest {
@Test
public void testNonCached() {
InternalCache<String, String> cache = new InternalCache<>();
try {
Assert.assertEquals("hi", cache.get("hi", new Callable<String>() {
@Override
public String call() throws Exception {
return "hi";
}
}));
} catch (ExecutionException e) {
throw new AssertionError(e);
}
}
@Test
public void testCached() {
InternalCache<String, String> cache = new InternalCache<>();
try {
Assert.assertEquals("hi", cache.get("hi", new Callable<String>() {
@Override
public String call() throws Exception {
return "hi";
}
}));
Assert.assertEquals("hi", cache.get("hi", new Callable<String>() {
@Override
public String call() throws Exception {
Assert.fail("Cache is using loader!");
return null;
}
}));
} catch (ExecutionException e) {
throw new AssertionError(e);
}
}
@Test
public void testWriteExpiry() {
final Object one = new Object();
InternalCache<String, Object> cache = new InternalCache<>(100); // not very long
try {
// Successive calls should always work.
Assert.assertEquals(one, cache.get("hi", new Callable<Object>() {
@Override
public Object call() throws Exception {
return one;
}
}));
Assert.assertEquals(one, cache.get("hi", new Callable<Object>() {
@Override
public Object call() throws Exception {
Assert.fail("Cache is using loader!");
return null;
}
}));
// But try again in a second and a bit:
try {
Thread.sleep(150);
} catch (InterruptedException e) {
throw new AssertionError(e);
}
final Object two = new Object();
Assert.assertEquals(two, cache.get("hi", new Callable<Object>() {
@Override
public Object call() throws Exception {
return two;
}
}));
} catch (ExecutionException e) {
throw new AssertionError(e);
}
}
@Test
public void testCleanup() {
InternalCache<String, Object> cache = new InternalCache<>(10);
final Object one = new Object();
final Object two = new Object();
try {
Assert.assertEquals(one, cache.get("hi", new Callable<Object>() {
@Override
public Object call() throws Exception {
return one;
}
}));
try {
Thread.sleep(5);
} catch (InterruptedException e) {
throw new AssertionError(e);
}
cache.cleanup();
Assert.assertEquals(one, cache.get("hi", new Callable<Object>() {
@Override
public Object call() throws Exception {
return two;
}
}));
try {
Thread.sleep(5);
} catch (InterruptedException e) {
throw new AssertionError(e);
}
cache.cleanup();
Assert.assertEquals(two, cache.get("hi", new Callable<Object>() {
@Override
public Object call() throws Exception {
return two;
}
}));
} catch (ExecutionException e) {
throw new AssertionError(e);
}
}
}