Package com.amazonaws.services.lambda.runtime.api.client.logging

Class FramedTelemetryLogSink

  • All Implemented Interfaces:
    LogSink, Closeable, AutoCloseable
    public class FramedTelemetryLogSink
extends Object
implements LogSink
    FramedTelemetryLogSink implements the logging contract between runtimes and the platform. It implements a simple framing protocol so message boundaries can be determined. Each frame can be visualized as follows: 
     
 +----------------------+------------------------+-----------------------+
 | Frame Type - 4 bytes | Length (len) - 4 bytes | Message - 'len' bytes |
 +----------------------+------------------------+-----------------------+
    The first 4 bytes indicate the type of the frame - log frames have a type defined as the hex value 0xa55a0001. The second 4 bytes should indicate the message's length. The next 'len' bytes contain the message. The byte order is big-endian.