Timings v2

TODO: Add #isStopping to FullServerTickHandler#stopTiming in patch 191
expose isRunning

paper-api/src/main/java/co/aikar/timings/TimingIdentifier.java

@@ -0,0 +1,116 @@
+/*
+ * This file is licensed under the MIT License (MIT).
+ *
+ * Copyright (c) 2014 Daniel Ennis <http://aikar.co>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package co.aikar.timings;
+
+import co.aikar.util.LoadingMap;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicInteger;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * <p>Used as a basis for fast HashMap key comparisons for the Timing Map.</p>
+ *
+ * This class uses interned strings giving us the ability to do an identity check instead of equals() on the strings
+ */
+final class TimingIdentifier {
+    /**
+     * Holds all groups. Autoloads on request for a group by name.
+     */
+    static final Map<String, TimingGroup> GROUP_MAP = LoadingMap.of(new ConcurrentHashMap<>(64, .5F), TimingGroup::new);
+    private static final TimingGroup DEFAULT_GROUP = getGroup("Minecraft");
+    final String group;
+    final String name;
+    final TimingHandler groupHandler;
+    private final int hashCode;
+
+    TimingIdentifier(@Nullable String group, @NotNull String name, @Nullable Timing groupHandler) {
+        this.group = group != null ? group: DEFAULT_GROUP.name;
+        this.name = name;
+        this.groupHandler = groupHandler != null ? groupHandler.getTimingHandler() : null;
+        this.hashCode = (31 * this.group.hashCode()) + this.name.hashCode();
+    }
+
+    @NotNull
+    static TimingGroup getGroup(@Nullable String groupName) {
+        if (groupName == null) {
+            //noinspection ConstantConditions
+            return DEFAULT_GROUP;
+        }
+
+        return GROUP_MAP.get(groupName);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (o == null) {
+            return false;
+        }
+
+        TimingIdentifier that = (TimingIdentifier) o;
+        return Objects.equals(group, that.group) && Objects.equals(name, that.name);
+    }
+
+    @Override
+    public int hashCode() {
+        return hashCode;
+    }
+
+    @Override
+    public String toString() {
+        return "TimingIdentifier{id=" + group + ":" + name +'}';
+    }
+
+    static class TimingGroup {
+
+        private static AtomicInteger idPool = new AtomicInteger(1);
+        final int id = idPool.getAndIncrement();
+
+        final String name;
+        final List<TimingHandler> handlers = Collections.synchronizedList(new ArrayList<>(64));
+
+        private TimingGroup(String name) {
+            this.name = name;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            TimingGroup that = (TimingGroup) o;
+            return id == that.id;
+        }
+
+        @Override
+        public int hashCode() {
+            return id;
+        }
+    }
+}