fix[cache]: Comparison method violates its general contract

protocol/src/main/java/com/zfoo/protocol/model/Pair.java

@@ -74,7 +74,7 @@ public boolean equals(Object o) {
 
     @Override
     public int hashCode() {
-        return Objects.hash(key, value);
+        return Objects.hashCode(key);
     }
 
     @Override

protocol/src/main/java/com/zfoo/protocol/model/PairLong.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2020 The zfoo Authors
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and limitations under the License.
+ */
+
+package com.zfoo.protocol.model;
+
+
+import java.util.Objects;
+
+/**
+ * 键值对对象，只能在构造时传入键值
+ *
+ * @param <V> 值类型
+ * @author godotg
+ */
+public class PairLong<V> {
+
+    private long key;
+    private V value;
+
+    public PairLong() {
+
+    }
+
+    /**
+     * 构造
+     *
+     * @param key   键
+     * @param value 值
+     */
+    public PairLong(long key, V value) {
+        this.key = key;
+        this.value = value;
+    }
+
+    /**
+     * 获取键
+     *
+     * @return 键
+     */
+    public long getKey() {
+        return this.key;
+    }
+
+    /**
+     * 获取值
+     *
+     * @return 值
+     */
+    public V getValue() {
+        return this.value;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        PairLong<?> pairLong = (PairLong<?>) o;
+        return key == pairLong.key && Objects.equals(value, pairLong.value);
+    }
+
+    @Override
+    public int hashCode() {
+        return Long.hashCode(key);
+    }
+
+    @Override
+    public String toString() {
+        return "Pair [key=" + key + ", value=" + value + "]";
+    }
+}

scheduler/src/main/java/com/zfoo/scheduler/util/LazyCache.java

@@ -1,6 +1,7 @@
 package com.zfoo.scheduler.util;
 
 import com.zfoo.protocol.model.Pair;
+import com.zfoo.protocol.model.PairLong;
 
 import java.util.ArrayList;
 import java.util.concurrent.ConcurrentHashMap;
@@ -16,7 +17,7 @@
 public class LazyCache<K, V> {
 
     private static final float DEFAULT_BACK_PRESSURE_FACTOR = 0.11f;
-    private static final long MILLIS_MAX_SIZE_CHECK_INTERVAL = 13;
+    private static final long MILLIS_MAX_SIZE_CHECK_INTERVAL = 3;
 
     private static class CacheValue<V> {
         public volatile V value;
@@ -87,6 +88,7 @@ public void put(K key, V value) {
         if (oldCacheValue != null) {
             removeListener.accept(new Pair<>(key, oldCacheValue.value), RemovalCause.REPLACED);
         }
+        checkExpire();
         checkMaximumSize();
     }
 
@@ -134,16 +136,17 @@ public int size() {
     // -----------------------------------------------------------------------------------------------------------------
     private void checkMaximumSize() {
         if (cacheMap.size() > backPressureSize) {
-            var now = TimeUtils.currentTimeMillis();
+            var currentTimeMillis = TimeUtils.currentTimeMillis();
             var sizeCheckTime = sizeCheckTimeAtomic.get();
-            if (now > sizeCheckTime) {
-                if (sizeCheckTimeAtomic.compareAndSet(sizeCheckTime, now + MILLIS_MAX_SIZE_CHECK_INTERVAL)) {
+            if (currentTimeMillis > sizeCheckTime) {
+                if (sizeCheckTimeAtomic.compareAndSet(sizeCheckTime, currentTimeMillis + MILLIS_MAX_SIZE_CHECK_INTERVAL)) {
                     var exceedList = cacheMap.entrySet()
                             .stream()
-                            .sorted((a, b) -> Long.compare(a.getValue().expireTime, b.getValue().expireTime))
+                            .map(it -> new PairLong<>(it.getValue().expireTime, it.getKey()))
+                            .sorted((a, b) -> Long.compare(a.getKey(), b.getKey()))
                             .limit(Math.max(0, cacheMap.size() - maximumSize))
                             .toList();
-                    exceedList.forEach(it -> removeForCause(it.getKey(), RemovalCause.SIZE));
+                    exceedList.forEach(it -> removeForCause(it.getValue(), RemovalCause.SIZE));
                 }
             }
         }

scheduler/src/test/java/com/zfoo/scheduler/util/LazyCacheTest.java

@@ -5,7 +5,11 @@
 import com.zfoo.protocol.util.ThreadUtils;
 import org.junit.Ignore;
 import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 import java.util.function.BiConsumer;
 
 /**
@@ -14,25 +18,36 @@
 @Ignore
 public class LazyCacheTest {
 
+    private static final Logger logger = LoggerFactory.getLogger(LazyCacheTest.class);
+
     private static final BiConsumer<Pair<Integer, String>, LazyCache.RemovalCause> myRemoveCallback = new BiConsumer<Pair<Integer, String>, LazyCache.RemovalCause>() {
         @Override
         public void accept(Pair<Integer, String> pair, LazyCache.RemovalCause removalCause) {
-            System.out.println(StringUtils.format("remove key:[{}] value:[{}] removalCause:[{}]", pair.getKey(), pair.getValue(), removalCause));
+            logger.info("remove key:[{}] value:[{}] removalCause:[{}]", pair.getKey(), pair.getValue(), removalCause);
         }
     };
 
     @Test
     public void putTest() {
-        var lazyCache = new LazyCache<Integer, String>(3, 10 * TimeUtils.MILLIS_PER_SECOND, 5 * TimeUtils.MILLIS_PER_SECOND, myRemoveCallback);
+        var lazyCache = new LazyCache<Integer, String>(10, 10 * TimeUtils.MILLIS_PER_SECOND, 5 * TimeUtils.MILLIS_PER_SECOND, myRemoveCallback);
 
         lazyCache.put(1, "a");
         lazyCache.put(2, "b");
-        ThreadUtils.sleep(1000);
         lazyCache.put(3, "c");
-        ThreadUtils.sleep(1000);
         lazyCache.put(4, "d");
-        ThreadUtils.sleep(1000);
         lazyCache.put(5, "e");
+        lazyCache.put(6, "f");
+        lazyCache.put(7, "g");
+        lazyCache.put(8, "h");
+        lazyCache.put(9, "i");
+        lazyCache.put(10, "j");
+        lazyCache.put(11, "k");
+        lazyCache.put(12, "l");
+        ThreadUtils.sleep(1000);
+        lazyCache.put(13, "m");
+        ThreadUtils.sleep(1000);
+        lazyCache.put(14, "n");
+        ThreadUtils.sleep(1000);
     }
 
     @Test
@@ -84,4 +99,35 @@ public void batchTest() {
             }
         }
     }
+
+
+    @Test
+    public void multipleThreadTest() {
+        int threadNum = Runtime.getRuntime().availableProcessors() + 1;
+        ExecutorService[] executors = new ExecutorService[threadNum];
+        for (int i = 0; i < executors.length; i++) {
+            executors[i] = Executors.newSingleThreadExecutor();
+        }
+        var lazyCache = new LazyCache<Integer, String>(1_0000, 10 * TimeUtils.MILLIS_PER_SECOND, 5 * TimeUtils.MILLIS_PER_SECOND, myRemoveCallback);
+        for (int i = 0; i < executors.length; i++) {
+
+            var executor = executors[i];
+            int i1 = i;
+            executor.execute(new Runnable() {
+                @Override
+                public void run() {
+                    var startIndex = i1 * 1_0000;
+                    for (int j = i1 * 1_0000; j < startIndex + 1_0000; j++) {
+                        lazyCache.put(j, String.valueOf(j));
+                    }
+                    for (int j = 0; j < 10000; j++) {
+                        lazyCache.get(j);
+                        ThreadUtils.sleep(1);
+                    }
+                }
+            });
+        }
+        ThreadUtils.sleep(Long.MAX_VALUE);
+    }
+
 }