Google cloud platform 如何在GCP Stackdriver日志UI中嵌套日志条目？

使用GCP日志客户端或API术语，如何嵌套如图所示的日志条目

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本用例在中进行了解释

确保在您发送的请求和应用程序日志中将

traceId

字段设置为非空值。下面是Scala中的示例代码：

import com.google.cloud.MonitoredResource
import com.google.cloud.logging.Payload._
import com.google.cloud.logging._
import collection.JavaConverters._
import org.threeten.bp.Duration

val logging = LoggingOptions.getDefaultInstance().getService()
val traceId = "keasdfwxcbrbntpoiuwehrtiojsadf";

var firstEntry = {
  LogEntry.newBuilder(StringPayload.of("string-payload-one"))
    .setSeverity(Severity.ERROR)
    .setLogName("app")
    .setTimestamp(1519955138399L)
    .setResource(MonitoredResource.newBuilder("global").build())
    .setLabels(Map("environment" -> "testing").asJava)
    .setTrace(traceId)
    .build()
}

var midEntry = {
  LogEntry.newBuilder(StringPayload.of("string-payload-two"))
    .setSeverity(Severity.INFO)
    .setLogName("request")
    .setResource(MonitoredResource.newBuilder("global").build())
    .setHttpRequest(HttpRequest.newBuilder().setStatus(200).setRequestUrl("/about-us").setLatency(Duration.ofMillis(1234)).build())
    .setTimestamp(1519955137906L)
    .setLabels(Map("environment" -> "testing").asJava)
    .setTrace(traceId)
    .build()
}

var lastEntry = {
  LogEntry.newBuilder(StringPayload.of("string-payload-three"))
    .setSeverity(Severity.ERROR)
    .setLogName("app")
    .setResource(MonitoredResource.newBuilder("global").build())
    .setTimestamp(1519955138523L)
    .setLabels(Map("environment" -> "testing").asJava)
    .setTrace(traceId)
    .build()
}

logging.write(List(firstEntry, midEntry, lastEntry).asJava)

最后，日志条目应显示在各自的日志中，并作为请求的子项显示在“交叉日志”中，如下所示：