grpc with Vertx Logs 需要解释

Question

我已经使用 Kotlin 实现了带有 Vertx 的 grpc API 并启用了 FINEST 日志级别以用于调试目的。在我的集成测试中，我尝试使用通道将 grpc 客户端连接到服务器。

客户端代码段：

    val clientAsync1 = ctx.async()
            val channel1 = VertxChannelBuilder
                    .forAddress(vertx, "localhost", 10000)
                    .usePlaintext(true)
                    .build()
            val stub1 = ExampleGrpc.newVertxStub(channel1)

            val request = builderUtil.buildRequest()

            stub1.attemptFriendship(request) { stream ->
                    stream.handler { response ->

                    }
            }

我在 grpc verticle 的日志中看到以下内容：

    [main] 2018-05-24T12:42:27.69+09:00 FINE [io.grpc.internal.ManagedChannelImpl]  [{0}] Exiting idle mode
    [grpc-default-executor-0] 2018-05-24T12:42:27.71+09:00 FINE [io.grpc.internal.ManagedChannelImpl]  [{0}] resolved address: {1}, config={2}
    [main] 2018-05-24T12:42:27.713+09:00 FINE [io.grpc.internal.ManagedChannelImpl]  [{0}] {1} created for {2}
    [main] 2018-05-24T12:42:27.759+09:00 FINE [io.grpc.internal.InternalSubchannel]  [{0}] Created {1} for {2}
    [vert.x-eventloop-thread-0] 2018-05-24T12:42:28.081+09:00 FINE [io.grpc.internal.InternalSubchannel]  [{0}] {1} for {2} is ready
    [vert.x-eventloop-thread-0] 2018-05-24T12:42:35.956+09:00 FINE [io.grpc.internal.ManagedChannelImpl]  [{0}] Created with target {1}
    [vert.x-eventloop-thread-0] 2018-05-24T12:42:35.961+09:00 FINE [io.grpc.internal.ManagedChannelImpl]  [{0}] Exiting idle mode
    [grpc-default-executor-0] 2018-05-24T12:42:35.962+09:00 FINE [io.grpc.internal.ManagedChannelImpl]  [{0}] resolved address: {1}, config={2}
    [grpc-default-executor-0] 2018-05-24T12:42:35.962+09:00 FINE [io.grpc.internal.ManagedChannelImpl]  [{0}] {1} created for {2}
    [grpc-default-executor-0] 2018-05-24T12:42:35.963+09:00 FINE [io.grpc.internal.InternalSubchannel]  [{0}] Created {1} for {2}
    [vert.x-eventloop-thread-0] 2018-05-24T12:42:35.974+09:00 FINE [io.grpc.internal.InternalSubchannel]  [{0}] {1} for {2} is ready
    [vert.x-eventloop-thread-0] 2018-05-24T12:42:46.808+09:00 FINE [io.grpc.internal.ManagedChannelImpl]  [{0}] shutdown() called
    [vert.x-eventloop-thread-0] 2018-05-24T12:42:46.81+09:00 FINE [io.grpc.internal.ManagedChannelImpl]  [{0}] Shutting down

谁能解释一下 [{0}]{1}{2} 是什么意思？请注意，已创建多个通道来完成测试，并且响应是流。

Answer 1

{0}格式是MessageFormat which is the default formatter used by java.util.logging. When calling a method like log(Level level, String msg, Object[] params)的格式，params应该和msg组合成日志字符串。这是有益的，因为如果不打印日志，则可以避免处理。

如 java.util.logging.Logger 文档中所示：

Typically, formatters use java.text.MessageFormat style formatting to format parameters, so for example a format string "{0} {1}" would format two parameters as strings.

虽然在您的环境中配置的 java.util.logging.Formatter 似乎没有这样做。

grpc with Vertx Logs 需要解释

grpc with Vertx Logs Explanation Needed

kotlin

grpc

vert.x

grpc-java