software.amazon.kinesis.worker.metricstats

Class WorkerMetricStatsDAO

java.lang.Object

software.amazon.kinesis.worker.metricstats.WorkerMetricStatsDAO

public class WorkerMetricStatsDAO
extends Object

Constructor Summary

Constructors

Constructor and Description
WorkerMetricStatsDAO(software.amazon.awssdk.services.dynamodb.DynamoDbAsyncClient dynamoDbAsyncClient, LeaseManagementConfig.WorkerMetricsTableConfig tableConfig, Long workerMetricsReporterFrequencyMillis)

Method Summary

Modifier and Type	Method and Description
boolean	deleteMetrics(WorkerMetricStats workerMetrics) Deletes the WorkerMetricStats entry with conditional check on lastUpdateTime, if the worker has come alive and updated the lastUpdateTime then we no longer need to perform the deletion.
List<WorkerMetricStats>	getAllWorkerMetricStats() Performs the scan on the storage and returns list of all workerMetricStats objects.
void	initialize() Performs initialization of the WorkerMetricStats DAO and table.
void	updateMetrics(WorkerMetricStats workerMetrics) Updates the workerMetrics for the provided worker, method ignores the null attributes and overrides the only non-null from .

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

WorkerMetricStatsDAO

public WorkerMetricStatsDAO(software.amazon.awssdk.services.dynamodb.DynamoDbAsyncClient dynamoDbAsyncClient,
                            LeaseManagementConfig.WorkerMetricsTableConfig tableConfig,
                            Long workerMetricsReporterFrequencyMillis)

Method Detail

initialize

public void initialize()
                throws DependencyException

Performs initialization of the WorkerMetricStats DAO and table. This will create the table if it doesn't exist.

Throws:

DependencyException

updateMetrics

public void updateMetrics(WorkerMetricStats workerMetrics)

Updates the workerMetrics for the provided worker, method ignores the null attributes and overrides the only non-null from . This is a blocking call.

Parameters:

workerMetrics - : Updated WorkerMetricStats object, resourceStats, workerId and lastUpdateTime are required fields from

deleteMetrics

public boolean deleteMetrics(WorkerMetricStats workerMetrics)

Deletes the WorkerMetricStats entry with conditional check on lastUpdateTime, if the worker has come alive and updated the lastUpdateTime then we no longer need to perform the deletion.

Parameters:

workerMetrics - WorkerMetricStats that needs to be deleted.

Returns:

getAllWorkerMetricStats

public List<WorkerMetricStats> getAllWorkerMetricStats()

Performs the scan on the storage and returns list of all workerMetricStats objects.

Returns:

: List of all worker metric stats