Class LoggingAppender (0.132.0-alpha)

    <appender name="CLOUD" class="com.google.cloud.logging.logback.LoggingAppender">
         <!-- Optional: filter logs at and above this level -->
         <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
             <level>INFO</level>
         </filter>

         <!-- Optional: defaults to "java.log" -->
         <log>application.log</log>

         <!-- Optional: defaults to "ERROR" -->
         <flushLevel>WARN</flushLevel>

         <!-- Optional: defaults to ASYNC -->
         <writeSynchronicity>SYNC</writeSynchronicity>

         <!-- Optional: defaults to true -->
         <autoPopulateMetadata>false</autoPopulateMetadata>

         <!-- Optional: defaults to false -->
         <redirectToStdout>true</redirectToStdout>

         <!-- Optional: auto detects on App Engine Flex, Standard, GCE and GKE, defaults to "global". See supported resource types -->
         <resourceType></resourceType>

         <!-- Optional: defaults to the default credentials of the environment -->
         <credentialsFile>/path/to/credentials/file</credentialsFile>

         <!-- Optional: defaults to the project id obtained during authentication process. Project id is also used to construct resource name of the log entries -->
         <logDestinationProjectId>String</logDestinationProjectId>

         <!-- Optional: add custom labels to log entries using LoggingEnhancer classes -->
         <enhancer>com.example.enhancers.TestLoggingEnhancer</enhancer>
         <enhancer>com.example.enhancers.AnotherEnhancer</enhancer>

         <!-- Optional: specifies if a batch's valid entries should be written even if some other entry failed due to an error. Defaults to true -->
         <partialSuccess>true</partialSuccess>

         <!-- Optional: In the asynchronous mode the call(s) to Logging API takes place asynchronously and few calls to write()
         method may be batched together to compose a single call to Logging API. In order to control the batching settings,
         the logbackBatchingSettings section can be used as shown below.
         See BatchingSettings
         for more info regarding parameters shown below -->
         <logbackBatchingSettings>
            <elementCountThreshold>100</elementCountThreshold>
            <requestByteThreshold>1000</requestByteThreshold>
            <delayThreshold>500</delayThreshold>
            <maxOutstandingElementCount>10000</maxOutstandingElementCount>
            <maxOutstandingRequestBytes>100000</maxOutstandingRequestBytes>
            <limitExceededBehavior>Ignore</limitExceededBehavior>
         </logbackBatchingSettings>
     </appender>