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| <th class="colFirst" scope="row"><a href="FileSink.html" title="class in org.apache.heron.metricsmgr.sink">FileSink</a></th> |
| <td class="colLast"> |
| <div class="block">A metrics sink that writes to a file in json format |
| We would create/overwrite a file every time the flush() in invoked |
| We would save at most fileMaximum metrics file in disk</div> |
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| <th class="colFirst" scope="row"><a href="FileSinkTest.html" title="class in org.apache.heron.metricsmgr.sink">FileSinkTest</a></th> |
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| <td class="colLast"> |
| <div class="block">A metrics sink that writes to a Graphite server</div> |
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| <th class="colFirst" scope="row"><a href="GraphiteSink.Graphite.html" title="class in org.apache.heron.metricsmgr.sink">GraphiteSink.Graphite</a></th> |
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| <th class="colFirst" scope="row"><a href="PrometheusSink.html" title="class in org.apache.heron.metricsmgr.sink">PrometheusSink</a></th> |
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| <div class="block">A web sink that exposes and endpoint that Prometheus can scrape |
| |
| metrics are generated in a text format and separated with a newline "\n" |
| https://prometheus.io/docs/instrumenting/exposition_formats |
| |
| metrics format: |
| heron_metric{topology="topology-name",component="component-id",instance="instance-id"} value timestamp</div> |
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| <th class="colFirst" scope="row"><a href="SinkContextImpl.html" title="class in org.apache.heron.metricsmgr.sink">SinkContextImpl</a></th> |
| <td class="colLast"> |
| <div class="block">Context needed for an IMetricsSink to init.</div> |
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| <th class="colFirst" scope="row"><a href="WebSink.html" title="class in org.apache.heron.metricsmgr.sink">WebSink</a></th> |
| <td class="colLast"> |
| <div class="block">A metrics sink that publishes metrics on a http endpoint</div> |
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| <div class="block">WebSink Tester.</div> |
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