Chronicle 与 Chronicle-queue 包

我刚刚开始使用历史记录队列 - 但是我对使用哪个 API 来读取/写入队列有点困惑。具体来说编年史队列 5 https://www.javadoc.io/doc/net.openhft/chronicle-queue/5.17.17 vs 编年史-3.5.* https://www.javadoc.io/doc/net.openhft/chronicle/3.5.3

我经历过这个link https://github.com/OpenHFT/Chronicle-Queue#contents它基本上使用chronicle-queue API，但还有其他类似的this https://www.baeldung.com/java-chronicle-queue它使用编年史。

下面这2个有什么区别？

 Chronicle chronicle =  ChronicleQueueBuilder.indexed(_location).build();
 ExcerptAppender appender = chronicle.createAppender();
 appender.startExcerpt();
 appender.writeUTF("Hello World");

vs

ChronicleQueue queue = ChronicleQueue.singleBuilder(_location).build();
final net.openhft.chronicle.queue.ExcerptAppender appender = queue.acquireAppender();
 try (DocumentContext dc = appender.writingDocument()) 
 {
     dc.wire().write("hello").text("world " );
 }

Javadoc 文档编年史队列 https://static.javadoc.io/net.openhft/chronicle-queue/5.17.17/net/openhft/chronicle/queue/ChronicleQueue.html and 编年史 https://static.javadoc.io/net.openhft/chronicle/3.5.3/net/openhft/chronicle/Chronicle.html看起来很相似

他们都在向历史记录队列写入消息。我相信这一点

Chronicle chronicle =  ChronicleQueueBuilder.indexed(_location).build();
ExcerptAppender appender = chronicle.createAppender();
appender.startExcerpt();
appender.writeUTF("Hello World");

现在可以像这样写入编年史队列 5

try (final ChronicleQueue queue = SingleChronicleQueueBuilder.binary("temp-dir").build()) {
   final ExcerptAppender appender = queue.acquireAppender();
   appender.writeText("Hello World");
}

或者如果你想存储key:value数据，像这样

try (final ChronicleQueue queue = SingleChronicleQueueBuilder.binary("temp-dir-2").build()) {
  final ExcerptAppender appender = queue.acquireAppender();
  try (DocumentContext dc = appender.writingDocument()) {
    dc.wire().write("hello").text("world");
  }
  DumpQueueMain.dump("temp-dir-2");
}

您可以使用

DumpQueueMain.dump("temp-dir-2");

例如，查看数据是如何存储的

# position: 131360, header: 2
--- !!data #binary
hello: world