wildfire chat server source initial submit

2019-03-16 17:04:23 +08:00
parent e59217bd10
commit cab3ca0916
1466 changed files with 528862 additions and 15919 deletions
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2012-2017 The original author or authors
+ * ------------------------------------------------------
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * and Apache License v2.0 which accompanies this distribution.
+ *
+ * The Eclipse Public License is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * The Apache License v2.0 is available at
+ * http://www.opensource.org/licenses/apache2.0.php
+ *
+ * You may elect to redistribute this code under either of these licenses.
+ */
+
+package io.moquette.spi.impl;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.handler.codec.mqtt.MqttMessage;
+import io.netty.handler.codec.mqtt.MqttMessageIdVariableHeader;
+import java.util.Map;
+
+/**
+ * Utility static methods, like Map get with default value, or elvis operator.
+ */
+public final class Utils {
+
+    public static <T, K> T defaultGet(Map<K, T> map, K key, T defaultValue) {
+        T value = map.get(key);
+        if (value != null) {
+            return value;
+        }
+        return defaultValue;
+    }
+
+    public static int messageId(MqttMessage msg) {
+        return ((MqttMessageIdVariableHeader) msg.variableHeader()).messageId();
+    }
+
+    public static byte[] readBytesAndRewind(ByteBuf payload) {
+        byte[] payloadContent = new byte[payload.readableBytes()];
+        int mark = payload.readerIndex();
+        payload.readBytes(payloadContent);
+        payload.readerIndex(mark);
+        return payloadContent;
+    }
+
+    private Utils() {
+    }
+}