ehoner commented on code in PR #1662:
URL: https://github.com/apache/samza/pull/1662#discussion_r1227312731
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samza-azure/src/main/java/org/apache/samza/system/azureblob/AzureBlobConfig.java:
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@@ -80,6 +80,12 @@ public class AzureBlobConfig extends MapConfig {
public static final String SYSTEM_MAX_FLUSH_THRESHOLD_SIZE =
SYSTEM_AZUREBLOB_PREFIX + "maxFlushThresholdSize";
private static final int SYSTEM_MAX_FLUSH_THRESHOLD_SIZE_DEFAULT = 10485760;
+ // initialization size of in-memory OutputStream
+ // This value should be between SYSTEM_INIT_BUFFER_SIZE_DEFAULT and
getMaxFlushThresholdSize() exclusive.
+ public static final String SYSTEM_INIT_BUFFER_SIZE = SYSTEM_AZUREBLOB_PREFIX
+ "initBufferSize.bytes";
+ // re-use size for parameterless constructor java.io.ByteArrayOutputStream()
+ public static final int SYSTEM_INIT_BUFFER_SIZE_DEFAULT = 32;
Review Comment:
@mynameborat Can you provide an example? The comment above the field
identifies the source. tbc, `ByteArrayOutputStream` has two constructors, and
the value here is the default when using the [parameterless
constructor](https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/ByteArrayOutputStream.html#%3Cinit%3E()).
Fwiw, I am in-part also avoiding "magic" values. Where the implementation,
`AzureBlobOutputStream`, would need to "understand" if the value is
provided/set, ie. `-1` or `null`, and then select the "correct" constructor.
This allows the config object to establish the "meaning"/intent of the value
and create a "default" that is always usable by the implementation.
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