MessagePack

The deserialization library (messagepack) I am using does not provide null-terminated strings. Instead, I get a pointer to the beginning of the string and a length. What is the fastest way to compare this string to a normal null-terminated string? The fastest way is strncmp() which limits the length to be compared. if (strncmp(sa, sb, length)==0) ... This assumes however that the length you use is the maximum length of the two strings. If the null terminated string could have a bigger length, you first have to compare the length. if(strncmp(sa,sb, length)==0 && strlen(sa)<=length) // sa being

大纲 本系列会分为2-3篇文章. 第一篇介绍了SignalR的预备知识和原理 本文介绍SignalR以及ASP.NET Core里使用SignalR . 本文的内容: 介绍SignalR 在ASP.NET Core中使用SignalR SignalR SignalR是一个.NET Core/.NET Framework的开源实时框架. SignalR的可使用Web Socket, Server Sent Events 和 Long Polling作为底层传输方式. SignalR基于这三种技术构建, 抽象于它们之上, 它让你更好的关注业务问题而不是底层传输技术问题. SignalR这个框架分服务器端和客户端, 服务器端支持ASP.NET Core 和 ASP.NET; 而客户端除了支持浏览器里的javascript以外, 也支持其它类型的客户端, 例如桌面应用. 回落机制 SignalR使用的三种底层传输技术分别是Web Socket, Server Sent Events 和 Long Polling. 其中Web Socket仅支持比较现代的浏览器, Web服务器也不能太老. 而Server Sent Events 情况可能好一点, 但是也存在同样的问题. 所以SignalR采用了回落机制, SignalR有能力去协商支持的传输类型. Web

Recently I've found MessagePack , an alternative binary serialization format to Google's Protocol Buffers and JSON which also outperforms both. Also there's the BSON serialization format that is used by MongoDB for storing data. Can somebody elaborate the differences and the dis-/advantages of BSON vs MessagePack ? Just to complete the list of performant binary serialization formats: There are also Gobs which are going to be the successor of Google's Protocol Buffers . However in contrast to all the other mentioned formats those are not language-agnostic and rely on Go's built-in reflection

Has someone tried to use MessagePack with an Android app? Is it possible? I have tried to use the Jar from msgpack-java and received the following Exception: Caused by: java.lang.ExceptionInInitializerError at org.msgpack.Packer.pack(Packer.java:532) at org.msgpack.MessagePack.pack(MessagePack.java:31) ... 15 more Caused by: java.lang.ExceptionInInitializerError at org.msgpack.template.TemplateRegistry.<clinit>(TemplateRegistry.java:38) ... 17 more Caused by: java.lang.VerifyError: org.msgpack.template.BeansFieldEntryReader at org.msgpack.template.builder.BeansTemplateBuilder.<init

我们在使用 MessagePack 对 List 对象数据进行序列化的时候，发现序列化以后的二进制数组数据偏大的情况。 请注意，不是所有的 List 对象都会出现这种情况，这个根据你 List 对象中存储的内容有关。 有关本问题的测试源代码请参考： https://github.com/cwiki-us-demo/serialize-deserialize-demo-java/blob/master/src/test/java/com/insight/demo/serialize/MessagePackDataTest.java 中的内容。 考察下面的代码： List<MessageData> dataList = MockDataUtils.getMessageDataList(600000); ObjectMapper objectMapper = new ObjectMapper(new MessagePackFactory()); raw = objectMapper.writeValueAsBytes(dataList); FileUtils.byteCountToDisplaySize(raw.length); logger.debug("Raw Size: [{}]", FileUtils.byteCountToDisplaySize(raw.length));

老的 msgpack-java（例如 0.6.7）并不支持 MessagePack str8 数据类型。 当你的希望的你的应用程序需要支持老的版本的话，你需要禁用这个数据类型，例如使用下面的语句： MessagePack.PackerConfig config = new MessagePack.PackerConfig().withStr8FormatSupport(false); ObjectMapper mapperWithConfig = new ObjectMapper(new MessagePackFactory(config)); // This string is serialized as bin8 type byte[] resultWithoutStr8Format = mapperWithConfig.writeValueAsBytes(str8LengthString); https://www.cwiki.us/display/Serialization/MessagePack+Jackson+Dataformat 来源： https://www.cnblogs.com/huyuchengus/p/11330460.html

在本测试代码中，我们定义了一个 POJO 类，名字为 MessageData，你可以访问下面的链接找到有关这个类的定义。 https://github.com/cwiki-us-demo/serialize-deserialize-demo-java/blob/master/src/main/java/com/insight/demo/serialize/model/msgpack/MessageData.java POJO 的序列化和反序列化 你仅仅需要对 MessagePackFactory 进行实例化，然后传递参数到 com.fasterxml.jackson.databind.ObjectMapper 的构造方法。 然后你就可以用与 jackson-databind 相同的方法使用 MessagePack 格式化数据。 本测试方法，可以在 https://github.com/cwiki-us-demo/serialize-deserialize-demo-java/blob/master/src/test/java/com/insight/demo/serialize/MessagePackSerializer.java 中找到。 /** * SerializationPOJO */ @Test public void

我们知道 Java 是一个静态类型的语言。通过输入 Value MessagePack能够实现动态的特性。 Value 有方法来检查自己的类型（ isIntegerType() , isArrayType() , 等...)，同时也转换为自己的类型 ( asStringValue() , convert(Template)）。 本代码可以在 https://github.com/cwiki-us-demo/messagepack-6-demo-java/blob/master/src/test/java/com/insight/demo/msgpack/MessagePack6DynamicTyping.java 中查看。 package com.insight.demo.msgpack; import org.junit.Test; import org.msgpack.MessagePack; import org.msgpack.type.Value; import org.msgpack.unpacker.Converter; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.ArrayList; import java.util.List; import static org