feat: 抽象消息收集器。

mybatis-flex-core/src/main/java/com/mybatisflex/core/audit/AbstractMessageCollector.java

@@ -0,0 +1,77 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  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
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  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.mybatisflex.core.audit;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+
+/**
+ * 抽象消息收集器。
+ *
+ * @author 王帅
+ * @since 2023-09-28
+ */
+public abstract class AbstractMessageCollector implements MessageCollector {
+
+    private final MessageReporter messageSender;
+    private final List<AuditMessage> messages = Collections.synchronizedList(new ArrayList<>());
+    private final ReentrantReadWriteLock rrwLock = new ReentrantReadWriteLock();
+
+    protected AbstractMessageCollector(MessageReporter messageSender) {
+        this.messageSender = messageSender;
+    }
+
+    @Override
+    public void collect(AuditMessage message) {
+        try {
+            rrwLock.readLock().lock();
+            messages.add(message);
+        } finally {
+            rrwLock.readLock().unlock();
+        }
+    }
+
+    protected void doSendMessages() {
+        if (messages.isEmpty()) {
+            return;
+        }
+        List<AuditMessage> sendMessages;
+        try {
+            rrwLock.writeLock().lock();
+            sendMessages = new ArrayList<>(messages);
+            messages.clear();
+        } finally {
+            rrwLock.writeLock().unlock();
+        }
+        messageSender.sendMessages(sendMessages);
+    }
+
+    public void release() {
+        doSendMessages();
+    }
+
+    protected List<AuditMessage> getMessages() {
+        return messages;
+    }
+
+    protected MessageReporter getMessageSender() {
+        return messageSender;
+    }
+
+}